diff --git a/.gitmodules b/.gitmodules
index 1f53219..2c5ce1f 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,6 +1,3 @@
-[submodule "riscv-pk"]
-	path = riscv-pk
-	url = https://github.com/rcore-os/riscv-pk.git
 [submodule "user"]
     path = user
     url = https://github.com/rcore-os/rcore-user.git
diff --git a/README.md b/README.md
index 7c5d6bd..35f5a35 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ Going to be the next generation teaching operating system.
 
 Supported architectures: x86_64, RISCV32/64, AArch64, MIPS32
 
-Tested boards: QEMU, HiFive Unleashed, x86_64 PC (i5/i7), Raspberry Pi 3B+
+Tested boards: QEMU, HiFive Unleashed, x86_64 PC (i5/i7), Raspberry Pi 3B+, Kendryte K210 and FPGA running Rocket Chip
 
 ![demo](./docs/2_OSLab/os2atc/demo.png)
 
diff --git a/crate/memory/src/memory_set/handler/byframe.rs b/crate/memory/src/memory_set/handler/byframe.rs
index e7f90db..f01eca6 100644
--- a/crate/memory/src/memory_set/handler/byframe.rs
+++ b/crate/memory/src/memory_set/handler/byframe.rs
@@ -22,6 +22,20 @@ impl<T: FrameAllocator> MemoryHandler for ByFrame<T> {
         pt.unmap(addr);
     }
 
+    fn clone_map(
+        &self,
+        pt: &mut PageTable,
+        with: &Fn(&mut FnMut()),
+        addr: VirtAddr,
+        attr: &MemoryAttr,
+    ) {
+        let data = Vec::from(pt.get_page_slice_mut(addr));
+        with(&mut || {
+            self.map(pt, addr, attr);
+            pt.get_page_slice_mut(addr).copy_from_slice(&data);
+        });
+    }
+
     fn handle_page_fault(&self, _pt: &mut PageTable, _addr: VirtAddr) -> bool {
         false
     }
diff --git a/crate/memory/src/memory_set/handler/delay.rs b/crate/memory/src/memory_set/handler/delay.rs
index fd7b9d3..ac4e856 100644
--- a/crate/memory/src/memory_set/handler/delay.rs
+++ b/crate/memory/src/memory_set/handler/delay.rs
@@ -16,13 +16,6 @@ impl<T: FrameAllocator> MemoryHandler for Delay<T> {
         attr.apply(entry);
     }
 
-    fn map_eager(&self, pt: &mut PageTable, addr: VirtAddr, attr: &MemoryAttr) {
-        let target = self.allocator.alloc().expect("failed to alloc frame");
-        let entry = pt.map(addr, target);
-        entry.set_present(true);
-        attr.apply(entry);
-    }
-
     fn unmap(&self, pt: &mut PageTable, addr: VirtAddr) {
         let entry = pt.get_entry(addr).expect("failed to get entry");
         if entry.present() {
@@ -34,6 +27,30 @@ impl<T: FrameAllocator> MemoryHandler for Delay<T> {
         pt.unmap(addr);
     }
 
+    fn clone_map(
+        &self,
+        pt: &mut PageTable,
+        with: &Fn(&mut FnMut()),
+        addr: VirtAddr,
+        attr: &MemoryAttr,
+    ) {
+        let entry = pt.get_entry(addr).expect("failed to get entry");
+        if entry.present() {
+            // eager map and copy data
+            let data = Vec::from(pt.get_page_slice_mut(addr));
+            with(&mut || {
+                let target = self.allocator.alloc().expect("failed to alloc frame");
+                let target_data = pt.get_page_slice_mut(addr);
+                let entry = pt.map(addr, target);
+                target_data.copy_from_slice(&data);
+                attr.apply(entry);
+            });
+        } else {
+            // delay map
+            with(&mut || self.map(pt, addr, attr));
+        }
+    }
+
     fn handle_page_fault(&self, pt: &mut PageTable, addr: VirtAddr) -> bool {
         let entry = pt.get_entry(addr).expect("failed to get entry");
         if entry.present() {
@@ -44,6 +61,11 @@ impl<T: FrameAllocator> MemoryHandler for Delay<T> {
         entry.set_target(frame);
         entry.set_present(true);
         entry.update();
+        //init with zero for delay mmap mode
+        let data = pt.get_page_slice_mut(addr);
+        for x in data {
+            *x = 0;
+        }
         true
     }
 }
diff --git a/crate/memory/src/memory_set/handler/file.rs b/crate/memory/src/memory_set/handler/file.rs
new file mode 100644
index 0000000..09f0acb
--- /dev/null
+++ b/crate/memory/src/memory_set/handler/file.rs
@@ -0,0 +1,108 @@
+use super::*;
+
+/// Delay mapping a page to an area of a file.
+#[derive(Clone)]
+pub struct File<F, T> {
+    pub file: F,
+    pub mem_start: usize,
+    pub file_start: usize,
+    pub file_end: usize,
+    pub allocator: T,
+}
+
+pub trait Read: Clone + Send + Sync + 'static {
+    fn read_at(&self, offset: usize, buf: &mut [u8]) -> usize;
+}
+
+impl<F: Read, T: FrameAllocator> MemoryHandler for File<F, T> {
+    fn box_clone(&self) -> Box<MemoryHandler> {
+        Box::new(self.clone())
+    }
+
+    fn map(&self, pt: &mut PageTable, addr: usize, attr: &MemoryAttr) {
+        let entry = pt.map(addr, 0);
+        entry.set_present(false);
+        attr.apply(entry);
+    }
+
+    fn unmap(&self, pt: &mut PageTable, addr: usize) {
+        let entry = pt.get_entry(addr).expect("failed to get entry");
+        if entry.present() {
+            self.allocator.dealloc(entry.target());
+        }
+
+        // PageTable::unmap requires page to be present
+        entry.set_present(true);
+        pt.unmap(addr);
+    }
+
+    fn clone_map(
+        &self,
+        pt: &mut PageTable,
+        with: &Fn(&mut FnMut()),
+        addr: usize,
+        attr: &MemoryAttr,
+    ) {
+        let entry = pt.get_entry(addr).expect("failed to get entry");
+        if entry.present() && !attr.readonly {
+            // eager map and copy data
+            let data = Vec::from(pt.get_page_slice_mut(addr));
+            with(&mut || {
+                let target = self.allocator.alloc().expect("failed to alloc frame");
+                let target_data = pt.get_page_slice_mut(addr);
+                let entry = pt.map(addr, target);
+                target_data.copy_from_slice(&data);
+                attr.apply(entry);
+            });
+        } else {
+            // delay map
+            with(&mut || self.map(pt, addr, attr));
+        }
+    }
+
+    fn handle_page_fault(&self, pt: &mut PageTable, addr: usize) -> bool {
+        let addr = addr & !(PAGE_SIZE - 1);
+        let entry = pt.get_entry(addr).expect("failed to get entry");
+        if entry.present() {
+            return false;
+        }
+        let frame = self.allocator.alloc().expect("failed to alloc frame");
+        entry.set_target(frame);
+        entry.set_present(true);
+        let writable = entry.writable();
+        entry.set_writable(true);
+        entry.update();
+
+        self.fill_data(pt, addr);
+
+        let entry = pt.get_entry(addr).expect("failed to get entry");
+        entry.set_writable(writable);
+        entry.update();
+
+        true
+    }
+}
+
+impl<F: Read, T: FrameAllocator> File<F, T> {
+    fn fill_data(&self, pt: &mut PageTable, addr: VirtAddr) {
+        let data = pt.get_page_slice_mut(addr);
+        let file_offset = addr + self.file_start - self.mem_start;
+        let read_size = (self.file_end as isize - file_offset as isize)
+            .min(PAGE_SIZE as isize)
+            .max(0) as usize;
+        let read_size = self.file.read_at(file_offset, &mut data[..read_size]);
+        if read_size != PAGE_SIZE {
+            data[read_size..].iter_mut().for_each(|x| *x = 0);
+        }
+    }
+}
+
+impl<F, T> Debug for File<F, T> {
+    fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error> {
+        f.debug_struct("FileHandler")
+            .field("mem_start", &self.mem_start)
+            .field("file_start", &self.file_start)
+            .field("file_end", &self.file_end)
+            .finish()
+    }
+}
diff --git a/crate/memory/src/memory_set/handler/linear.rs b/crate/memory/src/memory_set/handler/linear.rs
index 1e10b90..1645f91 100644
--- a/crate/memory/src/memory_set/handler/linear.rs
+++ b/crate/memory/src/memory_set/handler/linear.rs
@@ -20,6 +20,16 @@ impl MemoryHandler for Linear {
         pt.unmap(addr);
     }
 
+    fn clone_map(
+        &self,
+        pt: &mut PageTable,
+        with: &Fn(&mut FnMut()),
+        addr: VirtAddr,
+        attr: &MemoryAttr,
+    ) {
+        with(&mut || self.map(pt, addr, attr));
+    }
+
     fn handle_page_fault(&self, _pt: &mut PageTable, _addr: VirtAddr) -> bool {
         false
     }
diff --git a/crate/memory/src/memory_set/handler/mod.rs b/crate/memory/src/memory_set/handler/mod.rs
index fd6602c..6154e96 100644
--- a/crate/memory/src/memory_set/handler/mod.rs
+++ b/crate/memory/src/memory_set/handler/mod.rs
@@ -1,23 +1,28 @@
 use super::*;
 
 // here may be a interesting part for lab
-pub trait MemoryHandler: Debug + 'static {
+pub trait MemoryHandler: Debug + Send + Sync + 'static {
     fn box_clone(&self) -> Box<MemoryHandler>;
 
     /// Map `addr` in the page table
     /// Should set page flags here instead of in page_fault_handler
     fn map(&self, pt: &mut PageTable, addr: VirtAddr, attr: &MemoryAttr);
 
-    /// Map `addr` in the page table eagerly (i.e. no delay allocation)
-    /// Should set page flags here instead of in page_fault_handler
-    fn map_eager(&self, pt: &mut PageTable, addr: VirtAddr, attr: &MemoryAttr) {
-        // override this when pages are allocated lazily
-        self.map(pt, addr, attr);
-    }
-
     /// Unmap `addr` in the page table
     fn unmap(&self, pt: &mut PageTable, addr: VirtAddr);
 
+    /// Clone map `addr` from one page table to another.
+    /// `pt` is the current active page table.
+    /// `with` is the `InactivePageTable::with` function.
+    /// Call `with` then use `pt` as target page table inside.
+    fn clone_map(
+        &self,
+        pt: &mut PageTable,
+        with: &Fn(&mut FnMut()),
+        addr: VirtAddr,
+        attr: &MemoryAttr,
+    );
+
     /// Handle page fault on `addr`
     /// Return true if success, false if error
     fn handle_page_fault(&self, pt: &mut PageTable, addr: VirtAddr) -> bool;
@@ -29,7 +34,7 @@ impl Clone for Box<MemoryHandler> {
     }
 }
 
-pub trait FrameAllocator: Debug + Clone + 'static {
+pub trait FrameAllocator: Debug + Clone + Send + Sync + 'static {
     fn alloc(&self) -> Option<PhysAddr>;
     fn dealloc(&self, target: PhysAddr);
 }
@@ -37,8 +42,10 @@ pub trait FrameAllocator: Debug + Clone + 'static {
 mod byframe;
 mod delay;
 mod linear;
+mod file;
 //mod swap;
 
 pub use self::byframe::ByFrame;
 pub use self::delay::Delay;
 pub use self::linear::Linear;
+pub use self::file::{File, Read};
diff --git a/crate/memory/src/memory_set/mod.rs b/crate/memory/src/memory_set/mod.rs
index 77eddc1..9eb566a 100644
--- a/crate/memory/src/memory_set/mod.rs
+++ b/crate/memory/src/memory_set/mod.rs
@@ -3,6 +3,7 @@
 
 use alloc::{boxed::Box, string::String, vec::Vec};
 use core::fmt::{Debug, Error, Formatter};
+use core::mem::size_of;
 
 use crate::paging::*;
 
@@ -23,8 +24,6 @@ pub struct MemoryArea {
     name: &'static str,
 }
 
-unsafe impl Send for MemoryArea {}
-
 impl MemoryArea {
     /*
      **  @brief  get slice of the content in the memory area
@@ -54,13 +53,27 @@ impl MemoryArea {
     pub fn contains(&self, addr: VirtAddr) -> bool {
         addr >= self.start_addr && addr < self.end_addr
     }
-    /// Check the array is within the readable memory
-    fn check_read_array<S>(&self, ptr: *const S, count: usize) -> bool {
-        ptr as usize >= self.start_addr && unsafe { ptr.add(count) as usize } <= self.end_addr
+    /// Check the array is within the readable memory.
+    /// Return the size of space covered in the area.
+    fn check_read_array<S>(&self, ptr: *const S, count: usize) -> usize {
+        // page align
+        let min_bound = (ptr as usize).max(Page::of_addr(self.start_addr).start_address());
+        let max_bound = unsafe { ptr.add(count) as usize }
+            .min(Page::of_addr(self.end_addr + PAGE_SIZE - 1).start_address());
+        if max_bound >= min_bound {
+            max_bound - min_bound
+        } else {
+            0
+        }
     }
-    /// Check the array is within the writable memory
-    fn check_write_array<S>(&self, ptr: *mut S, count: usize) -> bool {
-        !self.attr.readonly && self.check_read_array(ptr, count)
+    /// Check the array is within the writable memory.
+    /// Return the size of space covered in the area.
+    fn check_write_array<S>(&self, ptr: *mut S, count: usize) -> usize {
+        if self.attr.readonly {
+            0
+        } else {
+            self.check_read_array(ptr, count)
+        }
     }
     /// Check the null-end C string is within the readable memory, and is valid.
     /// If so, clone it to a String.
@@ -84,31 +97,13 @@ impl MemoryArea {
         let p3 = Page::of_addr(end_addr - 1) + 1;
         !(p1 <= p2 || p0 >= p3)
     }
-    /*
-     **  @brief  map the memory area to the physice address in a page table
-     **  @param  pt: &mut T::Active   the page table to use
-     **  @retval none
-     */
+    /// Map all pages in the area to page table `pt`
     fn map(&self, pt: &mut PageTable) {
         for page in Page::range_of(self.start_addr, self.end_addr) {
             self.handler.map(pt, page.start_address(), &self.attr);
         }
     }
-    /*
-     **  @brief  map the memory area to the physice address in a page table eagerly
-     **  @param  pt: &mut T::Active   the page table to use
-     **  @retval none
-     */
-    fn map_eager(&self, pt: &mut PageTable) {
-        for page in Page::range_of(self.start_addr, self.end_addr) {
-            self.handler.map_eager(pt, page.start_address(), &self.attr);
-        }
-    }
-    /*
-     **  @brief  unmap the memory area from the physice address in a page table
-     **  @param  pt: &mut T::Active   the page table to use
-     **  @retval none
-     */
+    /// Unmap all pages in the area from page table `pt`
     fn unmap(&self, pt: &mut PageTable) {
         for page in Page::range_of(self.start_addr, self.end_addr) {
             self.handler.unmap(pt, page.start_address());
@@ -202,28 +197,60 @@ impl<T: InactivePageTable> MemorySet<T> {
         }
     }
     /// Check the pointer is within the readable memory
-    pub fn check_read_ptr<S>(&self, ptr: *const S) -> VMResult<()> {
-        self.check_read_array(ptr, 1)
+    pub unsafe fn check_read_ptr<S>(&self, ptr: *const S) -> VMResult<&'static S> {
+        self.check_read_array(ptr, 1).map(|s| &s[0])
     }
     /// Check the pointer is within the writable memory
-    pub fn check_write_ptr<S>(&self, ptr: *mut S) -> VMResult<()> {
-        self.check_write_array(ptr, 1)
+    pub unsafe fn check_write_ptr<S>(&self, ptr: *mut S) -> VMResult<&'static mut S> {
+        self.check_write_array(ptr, 1).map(|s| &mut s[0])
     }
     /// Check the array is within the readable memory
-    pub fn check_read_array<S>(&self, ptr: *const S, count: usize) -> VMResult<()> {
-        self.areas
-            .iter()
-            .find(|area| area.check_read_array(ptr, count))
-            .map(|_| ())
-            .ok_or(VMError::InvalidPtr)
+    pub unsafe fn check_read_array<S>(
+        &self,
+        ptr: *const S,
+        count: usize,
+    ) -> VMResult<&'static [S]> {
+        let mut valid_size = 0;
+        for area in self.areas.iter() {
+            valid_size += area.check_read_array(ptr, count);
+            if valid_size == size_of::<S>() * count {
+                return Ok(core::slice::from_raw_parts(ptr, count));
+            }
+        }
+        Err(VMError::InvalidPtr)
     }
     /// Check the array is within the writable memory
-    pub fn check_write_array<S>(&self, ptr: *mut S, count: usize) -> VMResult<()> {
-        self.areas
-            .iter()
-            .find(|area| area.check_write_array(ptr, count))
-            .map(|_| ())
-            .ok_or(VMError::InvalidPtr)
+    pub unsafe fn check_write_array<S>(
+        &self,
+        ptr: *mut S,
+        count: usize,
+    ) -> VMResult<&'static mut [S]> {
+        let mut valid_size = 0;
+        for area in self.areas.iter() {
+            valid_size += area.check_write_array(ptr, count);
+            if valid_size == size_of::<S>() * count {
+                return Ok(core::slice::from_raw_parts_mut(ptr, count));
+            }
+        }
+        Err(VMError::InvalidPtr)
+    }
+    /// Check the null-end C string pointer array
+    /// Used for getting argv & envp
+    pub unsafe fn check_and_clone_cstr_array(
+        &self,
+        mut argv: *const *const u8,
+    ) -> VMResult<Vec<String>> {
+        let mut args = Vec::new();
+        loop {
+            let cstr = *self.check_read_ptr(argv)?;
+            if cstr.is_null() {
+                break;
+            }
+            let arg = self.check_and_clone_cstr(cstr)?;
+            args.push(arg);
+            argv = argv.add(1);
+        }
+        Ok(args)
     }
     /// Check the null-end C string is within the readable memory, and is valid.
     /// If so, clone it to a String.
@@ -281,7 +308,15 @@ impl<T: InactivePageTable> MemorySet<T> {
             name,
         };
         self.page_table.edit(|pt| area.map(pt));
-        self.areas.push(area);
+        // keep order by start address
+        let idx = self
+            .areas
+            .iter()
+            .enumerate()
+            .find(|(_, other)| start_addr < other.start_addr)
+            .map(|(i, _)| i)
+            .unwrap_or(self.areas.len());
+        self.areas.insert(idx, area);
     }
 
     /*
@@ -472,20 +507,29 @@ impl<T: InactivePageTable> MemorySet<T> {
             None => false,
         }
     }
-}
 
-impl<T: InactivePageTable> Clone for MemorySet<T> {
-    fn clone(&self) -> Self {
-        let mut page_table = T::new();
+    pub fn clone(&mut self) -> Self {
+        let new_page_table = T::new();
+        let Self {
+            ref mut page_table,
+            ref areas,
+            ..
+        } = self;
         page_table.edit(|pt| {
-            // without CoW, we should allocate the pages eagerly
-            for area in self.areas.iter() {
-                area.map_eager(pt);
+            for area in areas.iter() {
+                for page in Page::range_of(area.start_addr, area.end_addr) {
+                    area.handler.clone_map(
+                        pt,
+                        &|f| unsafe { new_page_table.with(f) },
+                        page.start_address(),
+                        &area.attr,
+                    );
+                }
             }
         });
         MemorySet {
-            areas: self.areas.clone(),
-            page_table,
+            areas: areas.clone(),
+            page_table: new_page_table,
         }
     }
 }
diff --git a/docs/rcore-structures.drawio b/docs/rcore-structures.drawio
new file mode 100644
index 0000000..602cca0
--- /dev/null
+++ b/docs/rcore-structures.drawio
@@ -0,0 +1 @@
+<mxfile modified="2019-04-27T16:08:14.508Z" host="www.draw.io" agent="Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) draw.io/9.3.1 Chrome/66.0.3359.181 Electron/3.0.6 Safari/537.36" etag="Wx49rvUvEowvDB_jPneA" version="10.6.5" type="device"><diagram name="Page-1" id="e56a1550-8fbb-45ad-956c-1786394a9013">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</diagram></mxfile>
\ No newline at end of file
diff --git a/kernel/Cargo.lock b/kernel/Cargo.lock
index 4848e5e..24ac173 100644
--- a/kernel/Cargo.lock
+++ b/kernel/Cargo.lock
@@ -402,12 +402,12 @@ dependencies = [
 [[package]]
 name = "rcore-fs"
 version = "0.1.0"
-source = "git+https://github.com/rcore-os/rcore-fs#64d399fe664927f14853c22943a4bdeb34095f99"
+source = "git+https://github.com/rcore-os/rcore-fs#6f282baf2fe928d2c9774e526e63125684855221"
 
 [[package]]
 name = "rcore-fs-sfs"
 version = "0.1.0"
-source = "git+https://github.com/rcore-os/rcore-fs#64d399fe664927f14853c22943a4bdeb34095f99"
+source = "git+https://github.com/rcore-os/rcore-fs#6f282baf2fe928d2c9774e526e63125684855221"
 dependencies = [
  "bitvec 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -426,7 +426,7 @@ dependencies = [
 [[package]]
 name = "rcore-thread"
 version = "0.1.0"
-source = "git+https://github.com/rcore-os/rcore-thread#7236bfd2e2bde673773214739695bb2925a77ae5"
+source = "git+https://github.com/rcore-os/rcore-thread#fd972c7e3aa2b7618f625f143655c16adfd2ca78"
 dependencies = [
  "deque 0.3.2 (git+https://github.com/rcore-os/deque.git?branch=no_std)",
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/kernel/Cargo.toml b/kernel/Cargo.toml
index a226293..32855b1 100644
--- a/kernel/Cargo.toml
+++ b/kernel/Cargo.toml
@@ -19,9 +19,12 @@ authors = [
 ]
 
 [features]
+default = ["sv39"]
 # Page table sv39 or sv48 (for riscv64)
 sv39 = []
 board_u540 = ["sv39", "link_user"]
+board_k210 = ["sv39", "link_user"]
+board_rocket_chip = ["sv39", "link_user"]
 # (for aarch64 RaspberryPi3)
 nographic = []
 board_raspi3 = ["bcm2837", "link_user"]
@@ -37,6 +40,8 @@ board_pc = ["link_user"]
 link_user = []
 # Run cmdline instead of user shell, useful for automatic testing
 run_cmdline = []
+# Add performance profiling
+profile = []
 
 [profile.dev]
 # MUST >= 2 : Enable RVO to avoid stack overflow
diff --git a/kernel/Makefile b/kernel/Makefile
index d21f3f5..5de068e 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -23,18 +23,21 @@
 #   smp     = 1 | 2 | ...        SMP core number
 #   graphic = on | off           Enable/disable qemu graphical output
 #   board   = none               Running on QEMU
-#         | pc                  Only available on x86_64, run on real pc
+#         | pc                   Only available on x86_64, run on real pc
 #         | u540                 Only available on riscv64, run on HiFive U540, use Sv39
+#         | k210                 Only available on riscv64, run on K210, use Sv39
+#         | rocket_chip          Only available on riscv64, run on Rocket Chip, use Sv39
 #         | raspi3               Only available on aarch64, run on Raspberry Pi 3 Model B/B+
 #   pci_passthru = 0000:00:00.1  Only available on x86_64, passthrough the specified PCI device
 #   init = /bin/ls               Only available on riscv64, run specified program instead of user shell
 #   extra_nic = on | off         Only available on x86_64, add an additional e1000 nic
 #   u_boot = /path/to/u-boot.bin Only available on aarch64, use u-boot to boot rcore
+# . extra_features = profile | ... Add additional features
 
 arch ?= riscv64
 board ?= none
-mode ?= debug
-LOG  ?= debug
+mode ?= release
+LOG  ?=
 graphic ?= off
 smp  ?= 4
 pci_passthru ?=
@@ -59,7 +62,7 @@ ifeq ($(arch), $(filter $(arch), aarch64 mipsel))
 export SFSIMG = $(user_dir)/build/$(arch).img
 else
 # board is pc or qemu?
-ifeq ($(board), pc)
+ifeq ($(board), $(filter $(board), pc u540 k210 rocket_chip))
 #link user img, so use original image
 export SFSIMG = $(user_dir)/build/$(arch).img
 else
@@ -124,7 +127,9 @@ endif
 else ifeq ($(arch), riscv32)
 qemu_opts += \
 	-machine virt \
-	-kernel $(kernel_img) \
+	-serial mon:stdio \
+	-kernel ../tools/opensbi/virt_rv32.elf \
+	-device loader,addr=0x80400000,file=$(kernel_img) \
 	-drive file=$(SFSIMG),format=qcow2,id=sfs \
 	-device virtio-blk-device,drive=sfs
 qemu_net_opts += \
@@ -132,11 +137,21 @@ qemu_net_opts += \
 	-device virtio-net-device,netdev=net0
 
 else ifeq ($(arch), riscv64)
+ifeq ($(board), u540)
 qemu_opts += \
 	-machine virt \
-	-kernel $(kernel_img) \
+	-serial mon:stdio \
+	-kernel ../tools/opensbi/fu540.elf \
+	-device loader,addr=0x80200000,file=$(kernel_img)
+else
+qemu_opts += \
+	-machine virt \
+	-serial mon:stdio \
+	-kernel ../tools/opensbi/virt_rv64.elf \
+	-device loader,addr=0x80200000,file=$(kernel_img) \
 	-drive file=$(SFSIMG),format=qcow2,id=sfs \
 	-device virtio-blk-device,drive=sfs
+endif
 qemu_net_opts += \
 	-netdev type=tap,id=net0,script=no,downscript=no \
 	-device virtio-net-device,netdev=net0
@@ -192,15 +207,12 @@ features += raspi3_use_generic_timer
 endif
 endif
 
-ifeq ($(board), u540)
-features += sv39
-riscv_pk_args += --enable-sv39
-endif
-
 ifneq ($(board), none)
 features += board_$(board)
 endif
 
+features += $(extra_features)
+
 build_args := --target targets/$(target).json --features "$(features)"
 
 ifeq ($(mode), release)
@@ -297,28 +309,8 @@ ifeq ($(need_bootloader), true)
 endif
 
 $(kernel_img): kernel $(bootloader)
-ifeq ($(arch), riscv32)
-	@mkdir -p target/$(target)/bbl && \
-	cd target/$(target)/bbl && \
-	$(bbl_path)/configure \
-		$(riscv_pk_args) \
-		--with-arch=rv32imac \
-		--disable-fp-emulation \
-		--host=riscv64-unknown-elf \
-		--with-payload=$(abspath $(kernel)) && \
-	make -j && \
-	cp bbl $(abspath $@)
-else ifeq ($(arch), riscv64)
-	@mkdir -p target/$(target)/bbl && \
-	cd target/$(target)/bbl && \
-	$(bbl_path)/configure \
-		$(riscv_pk_args) \
-		--with-arch=rv64imac \
-		--disable-fp-emulation \
-		--host=riscv64-unknown-elf \
-		--with-payload=$(abspath $(kernel)) && \
-	make -j && \
-	cp bbl $(abspath $@)
+ifeq ($(arch), $(filter $(arch), riscv32 riscv64))
+	@$(objcopy) $(kernel) --strip-all -O binary $@
 else ifeq ($(arch), aarch64)
 ifneq ($(u_boot), )
 	@cp $(u_boot) $@
@@ -335,13 +327,12 @@ kernel: $(dtb)
 ifeq ($(arch), x86_64)
 	@bootimage build $(build_args)
 	@mv target/x86_64/bootimage.bin $(bootimage)
-else ifeq ($(arch), riscv32)
-	@-patch -p0 -N -b \
-		$(shell rustc --print sysroot)/lib/rustlib/src/rust/src/libcore/sync/atomic.rs \
-		src/arch/riscv32/atomic.patch
-	@cargo xbuild $(build_args)
-else ifeq ($(arch), riscv64)
+else ifeq ($(arch), $(filter $(arch), riscv32 riscv64))
+ifeq ($(board), k210)
+	@cp src/arch/riscv32/board/k210/linker.ld src/arch/riscv32/boot/linker64.ld
+else
 	@cp src/arch/riscv32/board/u540/linker.ld src/arch/riscv32/boot/linker64.ld
+endif
 	@-patch -p0 -N -b \
 		$(shell rustc --print sysroot)/lib/rustlib/src/rust/src/libcore/sync/atomic.rs \
 		src/arch/riscv32/atomic.patch
@@ -383,10 +374,19 @@ endif
 ifeq ($(board), u540)
 .PHONY:
 install: $(kernel_img)
-	@$(objcopy) -S -O binary --change-addresses -0x80000000 $< $(build_path)/bin
-	@../tools/u540/mkimg.sh $(build_path)/bin $(build_path)/sd.img
+	@$(objcopy) -S -O binary ../tools/opensbi/fu540.elf $(build_path)/bin
+	@dd if=$< of=$(build_path)/bin bs=0x20000 seek=16
+	@../tools/u540/mkimg.sh $(build_path)/bin $(build_path)/u540.img
+endif
+
+ifeq ($(board), k210)
+.PHONY:
+install: $(kernel_img)
+	@$(objcopy) -S -O binary ../tools/opensbi/k210.elf $(build_path)/k210.img
+	@dd if=$< of=$(build_path)/k210.img bs=0x10000 seek=1
+	@python3 ../tools/k210/kflash.py -b 600000 $(build_path)/k210.img
 endif
 
 .PHONY:
 addr2line:
-	@python3 ../tools/addr2line.py $(prefix)addr2line $(arch) $(mode)
+	@python3.7 ../tools/addr2line.py $(prefix)addr2line $(arch) $(mode)
diff --git a/kernel/events b/kernel/events
deleted file mode 100644
index d99bc24..0000000
--- a/kernel/events
+++ /dev/null
@@ -1,62 +0,0 @@
-virtqueue_pop
-virtio_blk_req_complete
-virtio_blk_rw_complete
-virtio_blk_submit_multireq
-virtio_blk_handle_write
-virtio_blk_handle_read
-e1000e_link_status
-e1000e_mac_set_sw
-e1000e_irq_itr_set
-e1000e_irq_eitr_set
-e1000e_tx_disabled
-e1000e_tx_descr
-e1000e_rx_descr
-#e1000e_rx_has_buffers
-e1000e_rx_start_recv
-#e1000e_rx_can_recv
-e1000e_rx_can_recv_rings_full
-e1000_receiver_overrun
-#e1000e_rx_receive_iov
-e1000e_core_ctrl_sw_reset
-e1000e_core_ctrl_phy_reset
-e1000e_rx_desc_buff_sizes
-e1000e_rx_set_rctl
-e1000e_rx_desc_len
-e1000e_core_ctrl_write
-e1000e_link_status_changed
-e1000e_rx_rss_dispatched_to_queue
-e1000e_rx_desc_buff_write
-e1000e_rx_null_descriptor
-e1000e_rx_set_rdt
-e1000e_msix_use_vector_fail
-e1000e_msix_init_fail
-e1000e_msi_init_fail
-e1000e_cb_pci_uninit
-e1000e_cfg_support_virtio
-e1000e_irq_msi_notify_postponed
-e1000e_irq_msix_notify_postponed_vec
-e1000e_irq_throttling_no_pending_vec
-e1000e_irq_msix_notify_vec
-e1000e_wrn_msix_vec_wrong
-e1000e_wrn_msix_invalid
-e1000e_irq_iam_clear_eiame
-e1000e_irq_icr_clear_eiac
-e1000e_irq_msi_notify
-pci_update_mappings_del
-pci_update_mappings_add
-e1000e_irq_icr_write
-e1000e_irq_icr_read_entry
-e1000e_irq_legacy_notify
-e1000e_irq_add_msi_other
-e1000e_irq_pending_interrupts
-e1000e_irq_icr_write
-e1000e_irq_msix_notify_vec
-e1000e_wrn_msix_vec_wrong
-e1000e_wrn_msix_invalid
-e1000e_irq_iam_clear_eiame
-e1000e_irq_icr_clear_eiac
-e1000e_irq_postponed_by_xitr
-e1000e_intrmgr_rearm_timer
-msix_*
-#ahci_*
-ide_*
\ No newline at end of file
diff --git a/kernel/src/arch/aarch64/interrupt/context.rs b/kernel/src/arch/aarch64/interrupt/context.rs
index 87f3a4e..03b4414 100644
--- a/kernel/src/arch/aarch64/interrupt/context.rs
+++ b/kernel/src/arch/aarch64/interrupt/context.rs
@@ -32,7 +32,7 @@ impl TrapFrame {
         tf.spsr = 0b1101_00_0101; // To EL 1, enable IRQ
         tf
     }
-    fn new_user_thread(entry_addr: usize, sp: usize) -> Self {
+    pub fn new_user_thread(entry_addr: usize, sp: usize) -> Self {
         use core::mem::zeroed;
         let mut tf: Self = unsafe { zeroed() };
         tf.sp = sp;
@@ -40,9 +40,6 @@ impl TrapFrame {
         tf.spsr = 0b1101_00_0000; // To EL 0, enable IRQ
         tf
     }
-    pub fn is_user(&self) -> bool {
-        unimplemented!()
-    }
 }
 
 /// 新线程的内核栈初始内容
@@ -201,11 +198,6 @@ impl Context {
         }
         .push_at(kstack_top, ttbr)
     }
-    /// Called at a new user context
-    /// To get the init TrapFrame in sys_exec
-    pub unsafe fn get_init_tf(&self) -> TrapFrame {
-        (*(self.stack_top as *const InitStack)).tf.clone()
-    }
 }
 
 const ASID_MASK: u16 = 0xffff;
diff --git a/kernel/src/arch/mipsel/boot/context.S b/kernel/src/arch/mipsel/boot/context.S
index 534ede5..d81e961 100644
--- a/kernel/src/arch/mipsel/boot/context.S
+++ b/kernel/src/arch/mipsel/boot/context.S
@@ -7,22 +7,23 @@
 .globl switch_context
 .extern _root_page_table_ptr
 .extern _cur_kstack_ptr
+.extern _cur_tls
 
 switch_context:
 	// save from's registers
 	addi  sp, sp, (-4*14)
 	sw sp, 0(a0)
 	sw ra, 0(sp)
-	sw s0, 2*4(sp)
-	sw s1, 3*4(sp)
-	sw s2, 4*4(sp)
-	sw s3, 5*4(sp)
-	sw s4, 6*4(sp)
-	sw s5, 7*4(sp)
-	sw s6, 8*4(sp)
-	sw s7, 9*4(sp)
-	sw s8, 10*4(sp)
-	sw gp, 11*4(sp)
+	sw s0, 4*4(sp)
+	sw s1, 5*4(sp)
+	sw s2, 6*4(sp)
+	sw s3, 7*4(sp)
+	sw s4, 8*4(sp)
+	sw s5, 9*4(sp)
+	sw s6, 10*4(sp)
+	sw s7, 11*4(sp)
+	sw s8, 12*4(sp)
+	sw gp, 13*4(sp)
 	// sw ra, 12*4(sp)
 	// sw sp, 13*4(sp)
 
@@ -31,27 +32,34 @@ switch_context:
 	lw s1, 0(s0)
 	sw s1, 4(sp)
 
+	// save TLS
+	la s2, _cur_tls
+	lw s1, 0(s2)
+	sw s1, 2*4(sp)
+
 	// restore to's registers
 	lw sp, 0(a1)
+
+	// restore page table address
 	lw s1, 4(sp)
 	sw s1, 0(s0)
 
-	// restore kstack ptr
-	// la s0, _cur_kstack_ptr
-	// addi s1, sp, 4 * 14
-	// sw s1, 0(s0)
+	// restore TLS
+	lw s1, 2*4(sp)
+	sw s1, 0(s2)
+	mtc0 s1, $4, 2  // cp0.user_local 
 
 	lw ra, 0(sp)
-	lw s0, 2*4(sp)
-	lw s1, 3*4(sp)
-	lw s2, 4*4(sp)
-	lw s3, 5*4(sp)
-	lw s4, 6*4(sp)
-	lw s5, 7*4(sp)
-	lw s6, 8*4(sp)
-	lw s7, 9*4(sp)
-	lw s8, 10*4(sp)
-	lw gp, 11*4(sp)
+	lw s0, 4*4(sp)
+	lw s1, 5*4(sp)
+	lw s2, 6*4(sp)
+	lw s3, 7*4(sp)
+	lw s4, 8*4(sp)
+	lw s5, 9*4(sp)
+	lw s6, 10*4(sp)
+	lw s7, 11*4(sp)
+	lw s8, 12*4(sp)
+	lw gp, 13*4(sp)
 	addi sp, sp, (4*14)
 
 	sw zero, 0(a1)
diff --git a/kernel/src/arch/mipsel/boot/trap.S b/kernel/src/arch/mipsel/boot/trap.S
index 2d40343..44d48d2 100644
--- a/kernel/src/arch/mipsel/boot/trap.S
+++ b/kernel/src/arch/mipsel/boot/trap.S
@@ -177,3 +177,6 @@ _root_page_table_ptr:
     .global _cur_kstack_ptr
 _cur_kstack_ptr:
     .space 4 # 4bytes
+    .global _cur_tls
+_cur_tls:
+    .space 4 # 4bytes
diff --git a/kernel/src/arch/mipsel/compiler_rt.rs b/kernel/src/arch/mipsel/compiler_rt.rs
deleted file mode 100644
index 04ed3c3..0000000
--- a/kernel/src/arch/mipsel/compiler_rt.rs
+++ /dev/null
@@ -1,8 +0,0 @@
-//! Workaround for missing compiler-builtin symbols
-//!
-//! [atomic](http://llvm.org/docs/Atomics.html#libcalls-atomic)
-
-#[no_mangle]
-pub extern "C" fn abort() {
-    panic!("abort");
-}
diff --git a/kernel/src/arch/mipsel/consts.rs b/kernel/src/arch/mipsel/consts.rs
index 48b1b82..84ae103 100644
--- a/kernel/src/arch/mipsel/consts.rs
+++ b/kernel/src/arch/mipsel/consts.rs
@@ -6,7 +6,8 @@ pub const KERNEL_OFFSET: usize = 0x80100000;
 
 pub const MEMORY_OFFSET: usize = 0x8000_0000;
 
-pub const USER_STACK_OFFSET: usize = 0x80000000 - USER_STACK_SIZE;
+pub const USER_STACK_OFFSET: usize = 0x70000000 - USER_STACK_SIZE;
 pub const USER_STACK_SIZE: usize = 0x10000;
+pub const USER32_STACK_OFFSET: usize = 0x70000000 - USER_STACK_SIZE;
 
 pub const MAX_DTB_SIZE: usize = 0x2000;
diff --git a/kernel/src/arch/mipsel/context.rs b/kernel/src/arch/mipsel/context.rs
index 69f9016..606fbad 100644
--- a/kernel/src/arch/mipsel/context.rs
+++ b/kernel/src/arch/mipsel/context.rs
@@ -50,8 +50,8 @@ pub struct TrapFrame {
     pub sp: usize,
     pub fp: usize,
     pub ra: usize,
-    /// Reserve space for hartid
-    pub _hartid: usize,
+    /// Reserved
+    pub reserved: usize,
 }
 
 impl TrapFrame {
@@ -76,7 +76,7 @@ impl TrapFrame {
     ///
     /// The new thread starts at `entry_addr`.
     /// The stack pointer will be set to `sp`.
-    fn new_user_thread(entry_addr: usize, sp: usize) -> Self {
+    pub fn new_user_thread(entry_addr: usize, sp: usize) -> Self {
         use core::mem::zeroed;
         let mut tf: Self = unsafe { zeroed() };
         tf.sp = sp;
@@ -120,6 +120,7 @@ impl InitStack {
 
 extern "C" {
     fn trap_return();
+    fn _cur_tls();
 }
 
 /// Saved registers for kernel context switches.
@@ -130,17 +131,21 @@ struct ContextData {
     ra: usize,
     /// Page table token
     satp: usize,
-    /// Callee-saved registers
+    /// s[0] = TLS
+    /// s[1] = reserved
+    /// s[2..11] = Callee-saved registers
     s: [usize; 12],
 }
 
 impl ContextData {
-    fn new(satp: usize) -> Self {
-        ContextData {
+    fn new(satp: usize, tls: usize) -> Self {
+        let mut context = ContextData {
             ra: trap_return as usize,
-            satp,
+            satp: satp,
             ..ContextData::default()
-        }
+        };
+        context.s[0] = tls;
+        context
     }
 }
 
@@ -191,7 +196,7 @@ impl Context {
         );
 
         InitStack {
-            context: ContextData::new(satp),
+            context: ContextData::new(satp, 0),
             tf: TrapFrame::new_kernel_thread(entry, arg, kstack_top),
         }
         .push_at(kstack_top)
@@ -214,7 +219,7 @@ impl Context {
         );
 
         InitStack {
-            context: ContextData::new(satp),
+            context: ContextData::new(satp, 0),
             tf: TrapFrame::new_user_thread(entry_addr, ustack_top),
         }
         .push_at(kstack_top)
@@ -226,8 +231,9 @@ impl Context {
     /// The SATP register will be set to `satp`.
     /// All the other registers are same as the original.
     pub unsafe fn new_fork(tf: &TrapFrame, kstack_top: usize, satp: usize) -> Self {
+        let tls = unsafe { *(_cur_tls as *const usize) };
         InitStack {
-            context: ContextData::new(satp),
+            context: ContextData::new(satp, tls),
             tf: {
                 let mut tf = tf.clone();
                 // fork function's ret value, the new process is 0
@@ -253,20 +259,14 @@ impl Context {
         tls: usize,
     ) -> Self {
         InitStack {
-            context: ContextData::new(satp),
+            context: ContextData::new(satp, tls),
             tf: {
                 let mut tf = tf.clone();
                 tf.sp = ustack_top; // sp
-                tf.v1 = tls;
                 tf.v0 = 0; // return value
                 tf
             },
         }
         .push_at(kstack_top)
     }
-
-    /// Used for getting the init TrapFrame of a new user context in `sys_exec`.
-    pub unsafe fn get_init_tf(&self) -> TrapFrame {
-        (*(self.sp as *const InitStack)).tf.clone()
-    }
 }
diff --git a/kernel/src/arch/mipsel/cpu.rs b/kernel/src/arch/mipsel/cpu.rs
index 932744a..9ee6b4a 100644
--- a/kernel/src/arch/mipsel/cpu.rs
+++ b/kernel/src/arch/mipsel/cpu.rs
@@ -1,5 +1,6 @@
 use crate::consts::MAX_CPU_NUM;
 use core::ptr::{read_volatile, write_volatile};
+use mips::instructions;
 use mips::registers::cp0;
 
 static mut STARTED: [bool; MAX_CPU_NUM] = [false; MAX_CPU_NUM];
@@ -21,7 +22,9 @@ pub unsafe fn start_others(hart_mask: usize) {
 }
 
 pub fn halt() {
-    /* nothing to do */
+    unsafe {
+        instructions::wait();
+    }
 }
 
 pub unsafe fn exit_in_qemu(error_code: u8) -> ! {
diff --git a/kernel/src/arch/mipsel/interrupt.rs b/kernel/src/arch/mipsel/interrupt.rs
index bc60547..56757c4 100644
--- a/kernel/src/arch/mipsel/interrupt.rs
+++ b/kernel/src/arch/mipsel/interrupt.rs
@@ -70,6 +70,17 @@ pub extern "C" fn rust_trap(tf: &mut TrapFrame) {
         E::TLBModification => page_fault(tf),
         E::TLBLoadMiss => page_fault(tf),
         E::TLBStoreMiss => page_fault(tf),
+        E::ReservedInstruction => {
+            if !reserved_inst(tf) {
+                error!("Unhandled Exception @ CPU{}: {:?} ", 0, tf.cause.cause());
+                crate::trap::error(tf)
+            } else {
+                tf.epc = tf.epc + 4;
+            }
+        }
+        E::CoprocessorUnusable => {
+            tf.epc = tf.epc + 4;
+        }
         _ => {
             error!("Unhandled Exception @ CPU{}: {:?} ", 0, tf.cause.cause());
             crate::trap::error(tf)
@@ -149,6 +160,75 @@ fn syscall(tf: &mut TrapFrame) {
     }
 }
 
+fn set_trapframe_register(rt: usize, val: usize, tf: &mut TrapFrame) {
+    match rt {
+        1 => tf.at = val,
+        2 => tf.v0 = val,
+        3 => tf.v1 = val,
+        4 => tf.a0 = val,
+        5 => tf.a1 = val,
+        6 => tf.a2 = val,
+        7 => tf.a3 = val,
+        8 => tf.t0 = val,
+        9 => tf.t1 = val,
+        10 => tf.t2 = val,
+        11 => tf.t3 = val,
+        12 => tf.t4 = val,
+        13 => tf.t5 = val,
+        14 => tf.t6 = val,
+        15 => tf.t7 = val,
+        16 => tf.s0 = val,
+        17 => tf.s1 = val,
+        18 => tf.s2 = val,
+        19 => tf.s3 = val,
+        20 => tf.s4 = val,
+        21 => tf.s5 = val,
+        22 => tf.s6 = val,
+        23 => tf.s7 = val,
+        24 => tf.t8 = val,
+        25 => tf.t9 = val,
+        26 => tf.k0 = val,
+        27 => tf.k1 = val,
+        28 => tf.gp = val,
+        29 => tf.sp = val,
+        30 => tf.fp = val,
+        31 => tf.ra = val,
+        _ => {
+            error!("Unknown register {:?} ", rt);
+            crate::trap::error(tf)
+        }
+    }
+}
+
+fn reserved_inst(tf: &mut TrapFrame) -> bool {
+    let inst = unsafe { *(tf.epc as *const usize) };
+
+    let opcode = inst >> 26;
+    let rt = (inst >> 16) & 0b11111;
+    let rd = (inst >> 11) & 0b11111;
+    let sel = (inst >> 6) & 0b111;
+    let format = inst & 0b111111;
+
+    if opcode == 0b011111 && format == 0b111011 {
+        // RDHWR
+        if rd == 29 && sel == 0 {
+            extern "C" {
+                fn _cur_tls();
+            }
+
+            let tls = unsafe { *(_cur_tls as *const usize) };
+
+            set_trapframe_register(rt, tls, tf);
+            info!("Read TLS by rdhdr {:x} to register {:?}", tls, rt);
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    false
+}
+
 fn page_fault(tf: &mut TrapFrame) {
     // TODO: set access/dirty bit
     let addr = tf.vaddr;
@@ -164,6 +244,19 @@ fn page_fault(tf: &mut TrapFrame) {
                 tlb_entry.entry_lo0.get_pfn() << 12,
                 tlb_entry.entry_lo1.get_pfn() << 12
             );
+
+            let tlb_valid = if virt_addr.page_number() & 1 == 0 {
+                tlb_entry.entry_lo0.valid()
+            } else {
+                tlb_entry.entry_lo1.valid()
+            };
+
+            if !tlb_valid {
+                if !crate::memory::handle_page_fault(addr) {
+                    crate::trap::error(tf);
+                }
+            }
+
             tlb::write_tlb_random(tlb_entry)
         }
         Err(()) => {
diff --git a/kernel/src/arch/mipsel/mod.rs b/kernel/src/arch/mipsel/mod.rs
index 74103db..cf13942 100644
--- a/kernel/src/arch/mipsel/mod.rs
+++ b/kernel/src/arch/mipsel/mod.rs
@@ -1,4 +1,3 @@
-pub mod compiler_rt;
 pub mod consts;
 pub mod cpu;
 pub mod driver;
diff --git a/kernel/src/arch/riscv32/board/k210/linker.ld b/kernel/src/arch/riscv32/board/k210/linker.ld
new file mode 100644
index 0000000..7abc05b
--- /dev/null
+++ b/kernel/src/arch/riscv32/board/k210/linker.ld
@@ -0,0 +1,49 @@
+/* Copy from bbl-ucore : https://ring00.github.io/bbl-ucore      */
+
+/* Simple linker script for the ucore kernel.
+   See the GNU ld 'info' manual ("info ld") to learn the syntax. */
+
+OUTPUT_ARCH(riscv)
+ENTRY(_start)
+
+BASE_ADDRESS = 0xffffffffc0010000;
+
+SECTIONS
+{
+    /* Load the kernel at this address: "." means the current address */
+    . = BASE_ADDRESS;
+    start = .;
+
+    .text : {
+        stext = .;
+        *(.text.entry)
+        *(.text .text.*)
+        . = ALIGN(4K);
+        etext = .;
+    }
+
+    .rodata : {
+        srodata = .;
+        *(.rodata .rodata.*)
+        . = ALIGN(4K);
+        erodata = .;
+    }
+
+    .data : {
+        sdata = .;
+        *(.data .data.*)
+        edata = .;
+    }
+
+    .stack : {
+        *(.bss.stack)
+    }
+
+    .bss : {
+        sbss = .;
+        *(.bss .bss.*)
+        ebss = .;
+    }
+
+    PROVIDE(end = .);
+}
diff --git a/kernel/src/arch/riscv32/board/u540/linker.ld b/kernel/src/arch/riscv32/board/u540/linker.ld
index 6bbe85b..87ca826 100644
--- a/kernel/src/arch/riscv32/board/u540/linker.ld
+++ b/kernel/src/arch/riscv32/board/u540/linker.ld
@@ -6,7 +6,7 @@
 OUTPUT_ARCH(riscv)
 ENTRY(_start)
 
-BASE_ADDRESS = 0xffffffffc0020000;
+BASE_ADDRESS = 0xffffffffc0200000;
 
 SECTIONS
 {
diff --git a/kernel/src/arch/riscv32/board/u540/mod.rs b/kernel/src/arch/riscv32/board/u540/mod.rs
index 2e9f7a6..816632d 100644
--- a/kernel/src/arch/riscv32/board/u540/mod.rs
+++ b/kernel/src/arch/riscv32/board/u540/mod.rs
@@ -4,7 +4,7 @@ use super::consts::KERNEL_OFFSET;
 pub unsafe fn init_external_interrupt() {
     const HART1_S_MODE_INTERRUPT_ENABLES: *mut u64 = (KERNEL_OFFSET + 0x0C00_2100) as *mut u64;
     const SERIAL: u64 = 4;
-    HART1_S_MODE_INTERRUPT_ENABLES.write(1 << SERIAL);
+    HART1_S_MODE_INTERRUPT_ENABLES.write_volatile(1 << SERIAL);
 }
 
 /// Claim and complete external interrupt by reading and writing to
@@ -13,7 +13,14 @@ pub unsafe fn handle_external_interrupt() {
     const HART1_S_MODE_INTERRUPT_CLAIM_COMPLETE: *mut u32 =
         (KERNEL_OFFSET + 0x0C20_2004) as *mut u32;
     // claim
-    let source = HART1_S_MODE_INTERRUPT_CLAIM_COMPLETE.read();
+    let source = HART1_S_MODE_INTERRUPT_CLAIM_COMPLETE.read_volatile();
     // complete
-    HART1_S_MODE_INTERRUPT_CLAIM_COMPLETE.write(source);
+    HART1_S_MODE_INTERRUPT_CLAIM_COMPLETE.write_volatile(source);
+}
+
+pub unsafe fn enable_serial_interrupt() {
+    const SERIAL_BASE: *mut u8 = (KERNEL_OFFSET + 0x10010000) as *mut u8;
+    const UART_REG_IE: usize = 4;
+    const UART_RXWM: u8 = 0x2;
+    SERIAL_BASE.add(UART_REG_IE).write_volatile(UART_RXWM);
 }
diff --git a/kernel/src/arch/riscv32/board/virt/mod.rs b/kernel/src/arch/riscv32/board/virt/mod.rs
new file mode 100644
index 0000000..52df872
--- /dev/null
+++ b/kernel/src/arch/riscv32/board/virt/mod.rs
@@ -0,0 +1,18 @@
+use super::consts::KERNEL_OFFSET;
+
+/// Mask all external interrupt except serial.
+pub unsafe fn init_external_interrupt() {
+    // By default:
+    // riscv-pk (bbl) enables all S-Mode IRQs (ref: machine/minit.c)
+    // OpenSBI v0.3 disables all IRQs (ref: platform/common/irqchip/plic.c)
+
+    const HART0_S_MODE_INTERRUPT_ENABLES: *mut u32 = (KERNEL_OFFSET + 0x0C00_2080) as *mut u32;
+    const SERIAL: u32 = 0xa;
+    HART0_S_MODE_INTERRUPT_ENABLES.write_volatile(1 << SERIAL);
+}
+
+pub unsafe fn enable_serial_interrupt() {
+    const UART16550: *mut u8 = (KERNEL_OFFSET + 0x10000000) as *mut u8;
+    UART16550.add(4).write_volatile(0x0B);
+    UART16550.add(1).write_volatile(0x01);
+}
diff --git a/kernel/src/arch/riscv32/boot/entry.asm b/kernel/src/arch/riscv32/boot/entry.asm
deleted file mode 100644
index 3cee2fd..0000000
--- a/kernel/src/arch/riscv32/boot/entry.asm
+++ /dev/null
@@ -1,19 +0,0 @@
-    .section .text.entry
-    .globl _start
-_start:
-    add t0, a0, 1
-    slli t0, t0, 16
-    
-    lui sp, %hi(bootstack)
-    addi sp, sp, %lo(bootstack)
-    add sp, sp, t0
-
-    call rust_main
-
-    .section .bss.stack
-    .align 12  #PGSHIFT
-    .global bootstack
-bootstack:
-    .space 4096 * 16 * 8
-    .global bootstacktop
-bootstacktop:
diff --git a/kernel/src/arch/riscv32/boot/entry32.asm b/kernel/src/arch/riscv32/boot/entry32.asm
new file mode 100644
index 0000000..3ea0676
--- /dev/null
+++ b/kernel/src/arch/riscv32/boot/entry32.asm
@@ -0,0 +1,55 @@
+    .section .text.entry
+    .globl _start
+_start:
+    # a0 == hartid
+    # pc == 0x80200000
+    # sp == 0x800xxxxx
+
+    # 1. set sp
+    # sp = bootstack + (hartid + 1) * 0x10000
+    add     t0, a0, 1
+    slli    t0, t0, 14
+    lui     sp, %hi(bootstack)
+    add     sp, sp, t0
+
+    # 2. enable paging
+    # satp = (1 << 31) | PPN(boot_page_table_sv32)
+    lui     t0, %hi(boot_page_table_sv32)
+    li      t1, 0xc0000000 - 0x80000000
+    sub     t0, t0, t1
+    srli    t0, t0, 12
+    li      t1, 1 << 31
+    or      t0, t0, t1
+    csrw    satp, t0
+    sfence.vma
+
+    # 3. jump to rust_main (absolute address)
+    lui     t0, %hi(rust_main)
+    addi    t0, t0, %lo(rust_main)
+    jr      t0
+
+    .section .bss.stack
+    .align 12   # page align
+    .global bootstack
+bootstack:
+    .space 4096 * 4 * 8
+    .global bootstacktop
+bootstacktop:
+
+    .section .data
+    .align 12   # page align
+boot_page_table_sv32:
+    # NOTE: assume kernel image < 16M
+    # 0x80000000 -> 0x80000000 (4M * 4)
+    # 0xc0000000 -> 0x80000000 (4M * 4)
+    .zero 4 * 512
+    .word (0x80000 << 10) | 0xcf # VRWXAD
+    .word (0x80400 << 10) | 0xcf # VRWXAD
+    .word (0x80800 << 10) | 0xcf # VRWXAD
+    .word (0x80c00 << 10) | 0xcf # VRWXAD
+    .zero 4 * 252
+    .word (0x80000 << 10) | 0xcf # VRWXAD
+    .word (0x80400 << 10) | 0xcf # VRWXAD
+    .word (0x80800 << 10) | 0xcf # VRWXAD
+    .word (0x80c00 << 10) | 0xcf # VRWXAD
+    .zero 4 * 252
diff --git a/kernel/src/arch/riscv32/boot/entry64.asm b/kernel/src/arch/riscv32/boot/entry64.asm
new file mode 100644
index 0000000..6fbedbb
--- /dev/null
+++ b/kernel/src/arch/riscv32/boot/entry64.asm
@@ -0,0 +1,48 @@
+    .section .text.entry
+    .globl _start
+_start:
+    # a0 == hartid
+    # pc == 0x80200000
+    # sp == 0x800xxxxx
+
+    # 1. set sp
+    # sp = bootstack + (hartid + 1) * 0x10000
+    add     t0, a0, 1
+    slli    t0, t0, 14
+    lui     sp, %hi(bootstack)
+    add     sp, sp, t0
+
+    # 2. enable paging
+    # satp = (8 << 60) | PPN(boot_page_table_sv39)
+    lui     t0, %hi(boot_page_table_sv39)
+    li      t1, 0xffffffffc0000000 - 0x80000000
+    sub     t0, t0, t1
+    srli    t0, t0, 12
+    li      t1, 8 << 60
+    or      t0, t0, t1
+    csrw    satp, t0
+    sfence.vma
+
+    # 3. jump to rust_main (absolute address)
+    lui     t0, %hi(rust_main)
+    addi    t0, t0, %lo(rust_main)
+    jr      t0
+
+    .section .bss.stack
+    .align 12   # page align
+    .global bootstack
+bootstack:
+    .space 4096 * 4 * 8
+    .global bootstacktop
+bootstacktop:
+
+    .section .data
+    .align 12   # page align
+boot_page_table_sv39:
+    # 0x00000000_80000000 -> 0x80000000 (1G)
+    # 0xffffffff_c0000000 -> 0x80000000 (1G)
+    .quad 0
+    .quad 0
+    .quad (0x80000 << 10) | 0xcf # VRWXAD
+    .zero 8 * 508
+    .quad (0x80000 << 10) | 0xcf # VRWXAD
diff --git a/kernel/src/arch/riscv32/boot/entry_k210.asm b/kernel/src/arch/riscv32/boot/entry_k210.asm
new file mode 100644
index 0000000..29a65e0
--- /dev/null
+++ b/kernel/src/arch/riscv32/boot/entry_k210.asm
@@ -0,0 +1,30 @@
+    .section .text.entry
+    .globl _start
+_start:
+    # a0 == hartid
+    # pc == 0x80010000
+    # sp == 0x8000xxxx
+
+    # 1. set sp
+    # sp = bootstack + (hartid + 1) * 0x10000
+    add     t0, a0, 1
+    slli    t0, t0, 14
+    lui     sp, %hi(bootstack)
+    add     sp, sp, t0
+
+    # 1.1 set device tree paddr
+    # OpenSBI give me 0 ???
+    li      a1, 0x800003b0
+
+    # 2. jump to rust_main (absolute address)
+    lui     t0, %hi(rust_main)
+    addi    t0, t0, %lo(rust_main)
+    jr      t0
+
+    .section .bss.stack
+    .align 12   # page align
+    .global bootstack
+bootstack:
+    .space 4096 * 4 * 2
+    .global bootstacktop
+bootstacktop:
diff --git a/kernel/src/arch/riscv32/boot/linker.ld b/kernel/src/arch/riscv32/boot/linker.ld
index bc3ba7f..b9efafa 100644
--- a/kernel/src/arch/riscv32/boot/linker.ld
+++ b/kernel/src/arch/riscv32/boot/linker.ld
@@ -6,7 +6,7 @@
 OUTPUT_ARCH(riscv)
 ENTRY(_start)
 
-BASE_ADDRESS = 0xC0020000;
+BASE_ADDRESS = 0xC0400000;
 
 SECTIONS
 {
diff --git a/kernel/src/arch/riscv32/boot/linker64.ld b/kernel/src/arch/riscv32/boot/linker64.ld
index 6bbe85b..87ca826 100644
--- a/kernel/src/arch/riscv32/boot/linker64.ld
+++ b/kernel/src/arch/riscv32/boot/linker64.ld
@@ -6,7 +6,7 @@
 OUTPUT_ARCH(riscv)
 ENTRY(_start)
 
-BASE_ADDRESS = 0xffffffffc0020000;
+BASE_ADDRESS = 0xffffffffc0200000;
 
 SECTIONS
 {
diff --git a/kernel/src/arch/riscv32/consts.rs b/kernel/src/arch/riscv32/consts.rs
index 45fa998..01b9f46 100644
--- a/kernel/src/arch/riscv32/consts.rs
+++ b/kernel/src/arch/riscv32/consts.rs
@@ -22,17 +22,17 @@ pub const KERNEL_P2_INDEX: usize = (KERNEL_OFFSET >> 12 >> 10) & 0x3ff;
 #[cfg(target_arch = "riscv64")]
 pub const KERNEL_P4_INDEX: usize = (KERNEL_OFFSET >> 12 >> 9 >> 9 >> 9) & 0o777;
 
-pub const KERNEL_HEAP_SIZE: usize = 0x00a0_0000;
+#[cfg(feature = "board_k210")]
+pub const KERNEL_HEAP_SIZE: usize = 0x0020_0000;
+#[cfg(not(feature = "board_k210"))]
+pub const KERNEL_HEAP_SIZE: usize = 0x0080_0000;
 
-#[cfg(target_arch = "riscv32")]
-pub const MEMORY_OFFSET: usize = 0x8000_0000;
-#[cfg(target_arch = "riscv64")]
 pub const MEMORY_OFFSET: usize = 0x8000_0000;
-
-#[cfg(target_arch = "riscv32")]
-pub const MEMORY_END: usize = 0x8100_0000;
-#[cfg(target_arch = "riscv64")]
-pub const MEMORY_END: usize = 0x8100_0000;
+// TODO: get memory end from device tree
+#[cfg(feature = "board_k210")]
+pub const MEMORY_END: usize = 0x8060_0000;
+#[cfg(not(feature = "board_k210"))]
+pub const MEMORY_END: usize = 0x8800_0000;
 
 // FIXME: rv64 `sh` and `ls` will crash if stack top > 0x80000000 ???
 pub const USER_STACK_OFFSET: usize = 0x80000000 - USER_STACK_SIZE;
diff --git a/kernel/src/arch/riscv32/context.rs b/kernel/src/arch/riscv32/context.rs
index 51df0c1..c8ac7ea 100644
--- a/kernel/src/arch/riscv32/context.rs
+++ b/kernel/src/arch/riscv32/context.rs
@@ -40,7 +40,7 @@ impl TrapFrame {
     ///
     /// The new thread starts at `entry_addr`.
     /// The stack pointer will be set to `sp`.
-    fn new_user_thread(entry_addr: usize, sp: usize) -> Self {
+    pub fn new_user_thread(entry_addr: usize, sp: usize) -> Self {
         use core::mem::zeroed;
         let mut tf: Self = unsafe { zeroed() };
         tf.x[2] = sp;
@@ -289,9 +289,4 @@ impl Context {
         }
         .push_at(kstack_top)
     }
-
-    /// Used for getting the init TrapFrame of a new user context in `sys_exec`.
-    pub unsafe fn get_init_tf(&self) -> TrapFrame {
-        (*(self.sp as *const InitStack)).tf.clone()
-    }
 }
diff --git a/kernel/src/arch/riscv32/cpu.rs b/kernel/src/arch/riscv32/cpu.rs
index f519e6f..7e146da 100644
--- a/kernel/src/arch/riscv32/cpu.rs
+++ b/kernel/src/arch/riscv32/cpu.rs
@@ -1,8 +1,3 @@
-use crate::consts::MAX_CPU_NUM;
-use core::ptr::{read_volatile, write_volatile};
-
-static mut STARTED: [bool; MAX_CPU_NUM] = [false; MAX_CPU_NUM];
-
 pub unsafe fn set_cpu_id(cpu_id: usize) {
     asm!("mv gp, $0" : : "r"(cpu_id));
 }
@@ -19,18 +14,6 @@ pub fn send_ipi(cpu_id: usize) {
     super::sbi::send_ipi(1 << cpu_id);
 }
 
-pub unsafe fn has_started(cpu_id: usize) -> bool {
-    read_volatile(&STARTED[cpu_id])
-}
-
-pub unsafe fn start_others(hart_mask: usize) {
-    for cpu_id in 0..32 {
-        if (hart_mask >> cpu_id) & 1 != 0 {
-            write_volatile(&mut STARTED[cpu_id], true);
-        }
-    }
-}
-
 pub fn halt() {
     unsafe { riscv::asm::wfi() }
 }
diff --git a/kernel/src/arch/riscv32/io.rs b/kernel/src/arch/riscv32/io.rs
index 161dfd1..ea1e74a 100644
--- a/kernel/src/arch/riscv32/io.rs
+++ b/kernel/src/arch/riscv32/io.rs
@@ -47,6 +47,3 @@ pub fn getchar_option() -> Option<char> {
 pub fn putfmt(fmt: Arguments) {
     SerialPort.write_fmt(fmt).unwrap();
 }
-
-const TXDATA: *mut u32 = 0x38000000 as *mut u32;
-const RXDATA: *mut u32 = 0x38000004 as *mut u32;
diff --git a/kernel/src/arch/riscv32/memory.rs b/kernel/src/arch/riscv32/memory.rs
index a846c11..314c7f2 100644
--- a/kernel/src/arch/riscv32/memory.rs
+++ b/kernel/src/arch/riscv32/memory.rs
@@ -8,13 +8,19 @@ use riscv::{addr::*, register::sstatus};
 
 /// Initialize the memory management module
 pub fn init(dtb: usize) {
+    // allow user memory access
+    // NOTE: In K210 priv v1.9.1, sstatus.SUM is PUM which has opposite meaning!
+    #[cfg(not(feature = "board_k210"))]
     unsafe {
         sstatus::set_sum();
-    } // Allow user memory access
-      // initialize heap and Frame allocator
+    }
+    // initialize heap and Frame allocator
     init_frame_allocator();
     init_heap();
     // remap the kernel use 4K page
+    unsafe {
+        super::paging::setup_recursive_mapping();
+    }
     remap_the_kernel(dtb);
 }
 
@@ -86,6 +92,8 @@ fn remap_the_kernel(dtb: usize) {
         Linear::new(offset),
         "bss",
     );
+    // TODO: dtb on rocket chip
+    #[cfg(not(feature = "board_rocket_chip"))]
     ms.push(
         dtb,
         dtb + super::consts::MAX_DTB_SIZE,
@@ -93,7 +101,7 @@ fn remap_the_kernel(dtb: usize) {
         Linear::new(offset),
         "dts",
     );
-    // map PLIC for HiFiveU
+    // map PLIC for HiFiveU & VirtIO
     let offset = -(KERNEL_OFFSET as isize);
     ms.push(
         KERNEL_OFFSET + 0x0C00_2000,
@@ -109,6 +117,22 @@ fn remap_the_kernel(dtb: usize) {
         Linear::new(offset),
         "plic1",
     );
+    // map UART for HiFiveU
+    ms.push(
+        KERNEL_OFFSET + 0x10010000,
+        KERNEL_OFFSET + 0x10010000 + PAGE_SIZE,
+        MemoryAttr::default(),
+        Linear::new(offset),
+        "uart",
+    );
+    // map UART for VirtIO
+    ms.push(
+        KERNEL_OFFSET + 0x10000000,
+        KERNEL_OFFSET + 0x10000000 + PAGE_SIZE,
+        MemoryAttr::default(),
+        Linear::new(offset),
+        "uart16550",
+    );
     unsafe {
         ms.activate();
     }
diff --git a/kernel/src/arch/riscv32/mod.rs b/kernel/src/arch/riscv32/mod.rs
index 650e881..75b7ccc 100644
--- a/kernel/src/arch/riscv32/mod.rs
+++ b/kernel/src/arch/riscv32/mod.rs
@@ -1,6 +1,10 @@
 #[cfg(feature = "board_u540")]
 #[path = "board/u540/mod.rs"]
 mod board;
+#[cfg(not(feature = "board_u540"))]
+#[path = "board/virt/mod.rs"]
+mod board;
+
 pub mod compiler_rt;
 pub mod consts;
 pub mod cpu;
@@ -13,19 +17,24 @@ mod sbi;
 pub mod syscall;
 pub mod timer;
 
+use self::consts::{KERNEL_OFFSET, MEMORY_OFFSET};
+use core::sync::atomic::{AtomicBool, Ordering};
 use log::*;
 
 #[no_mangle]
-pub extern "C" fn rust_main(hartid: usize, dtb: usize, hart_mask: usize) -> ! {
-    // An initial recursive page table has been set by BBL (shared by all cores)
+pub extern "C" fn rust_main(hartid: usize, device_tree_paddr: usize) -> ! {
+    let device_tree_vaddr = device_tree_paddr - MEMORY_OFFSET + KERNEL_OFFSET;
 
     unsafe {
         cpu::set_cpu_id(hartid);
     }
 
     if hartid != BOOT_HART_ID {
-        while unsafe { !cpu::has_started(hartid) } {}
-        println!("Hello RISCV! in hart {}, dtb @ {:#x}", hartid, dtb);
+        while !AP_CAN_INIT.load(Ordering::Relaxed) {}
+        println!(
+            "Hello RISCV! in hart {}, device tree @ {:#x}",
+            hartid, device_tree_vaddr
+        );
         others_main();
         //other_main -> !
     }
@@ -34,24 +43,27 @@ pub extern "C" fn rust_main(hartid: usize, dtb: usize, hart_mask: usize) -> ! {
         memory::clear_bss();
     }
 
-    println!("Hello RISCV! in hart {}, dtb @ {:#x}", hartid, dtb);
+    println!(
+        "Hello RISCV! in hart {}, device tree @ {:#x}",
+        hartid, device_tree_vaddr
+    );
 
     crate::logging::init();
     interrupt::init();
-    memory::init(dtb);
+    memory::init(device_tree_vaddr);
     timer::init();
     // FIXME: init driver on u540
-    #[cfg(not(feature = "board_u540"))]
-    crate::drivers::init(dtb);
-    #[cfg(feature = "board_u540")]
+    #[cfg(not(any(feature = "board_u540", feature = "board_rocket_chip")))]
+    crate::drivers::init(device_tree_vaddr);
+    #[cfg(not(feature = "board_k210"))]
     unsafe {
+        #[cfg(not(feature = "board_rocket_chip"))]
+        board::enable_serial_interrupt();
         board::init_external_interrupt();
     }
     crate::process::init();
 
-    unsafe {
-        cpu::start_others(hart_mask);
-    }
+    AP_CAN_INIT.store(true, Ordering::Relaxed);
     crate::kmain();
 }
 
@@ -62,6 +74,8 @@ fn others_main() -> ! {
     crate::kmain();
 }
 
+static AP_CAN_INIT: AtomicBool = AtomicBool::new(false);
+
 #[cfg(not(feature = "board_u540"))]
 const BOOT_HART_ID: usize = 0;
 #[cfg(feature = "board_u540")]
@@ -94,6 +108,10 @@ global_asm!(
     .endm
 "
 );
-
-global_asm!(include_str!("boot/entry.asm"));
+#[cfg(target_arch = "riscv32")]
+global_asm!(include_str!("boot/entry32.asm"));
+#[cfg(all(target_arch = "riscv64", not(feature = "board_k210")))]
+global_asm!(include_str!("boot/entry64.asm"));
+#[cfg(feature = "board_k210")]
+global_asm!(include_str!("boot/entry_k210.asm"));
 global_asm!(include_str!("boot/trap.asm"));
diff --git a/kernel/src/arch/riscv32/paging.rs b/kernel/src/arch/riscv32/paging.rs
index 12e61ec..d501d6f 100644
--- a/kernel/src/arch/riscv32/paging.rs
+++ b/kernel/src/arch/riscv32/paging.rs
@@ -198,7 +198,7 @@ impl InactivePageTable for InactivePageTable0 {
             fn start();
             fn end();
         }
-        let mut entrys: [PageTableEntry; 16] = unsafe { core::mem::uninitialized() };
+        let mut entrys: [PageTableEntry; 256] = unsafe { core::mem::uninitialized() };
         let entry_start = start as usize >> 22;
         let entry_end = (end as usize >> 22) + 1;
         let entry_count = entry_end - entry_start;
@@ -299,3 +299,13 @@ impl FrameDeallocator for FrameAllocatorForRiscv {
         dealloc_frame(frame.start_address().as_usize());
     }
 }
+
+pub unsafe fn setup_recursive_mapping() {
+    let frame = satp::read().frame();
+    let root_page_table = unsafe { &mut *(frame.start_address().as_usize() as *mut RvPageTable) };
+    root_page_table.set_recursive(RECURSIVE_INDEX, frame);
+    unsafe {
+        sfence_vma_all();
+    }
+    info!("setup recursive mapping end");
+}
diff --git a/kernel/src/arch/riscv32/sbi.rs b/kernel/src/arch/riscv32/sbi.rs
index 6a56ff1..babfa79 100644
--- a/kernel/src/arch/riscv32/sbi.rs
+++ b/kernel/src/arch/riscv32/sbi.rs
@@ -1,4 +1,5 @@
 //! Port from sbi.h
+#![allow(dead_code)]
 
 #[inline(always)]
 fn sbi_call(which: usize, arg0: usize, arg1: usize, arg2: usize) -> usize {
diff --git a/kernel/src/arch/x86_64/consts.rs b/kernel/src/arch/x86_64/consts.rs
index 2095e39..d872502 100644
--- a/kernel/src/arch/x86_64/consts.rs
+++ b/kernel/src/arch/x86_64/consts.rs
@@ -1,96 +1,6 @@
-// Copy from Redox consts.rs:
-
-// Because the memory map is so important to not be aliased, it is defined here, in one place
-// The lower 256 PML4 entries are reserved for userspace
-// Each PML4 entry references up to 512 GB of memory
-// The top (511) PML4 is reserved for recursive mapping
-// The second from the top (510) PML4 is reserved for the kernel
-/// The size of a single PML4
-pub const PML4_SIZE: usize = 0x0000_0080_0000_0000;
-pub const PML4_MASK: usize = 0x0000_ff80_0000_0000;
-
-/// Offset of recursive paging
-pub const RECURSIVE_PAGE_OFFSET: usize = (-(PML4_SIZE as isize)) as usize;
-pub const RECURSIVE_PAGE_PML4: usize = (RECURSIVE_PAGE_OFFSET & PML4_MASK) / PML4_SIZE;
-
-/// Offset of kernel
-pub const KERNEL_OFFSET: usize = RECURSIVE_PAGE_OFFSET - PML4_SIZE;
-pub const KERNEL_PML4: usize = (KERNEL_OFFSET & PML4_MASK) / PML4_SIZE;
-
-pub const KERNEL_SIZE: usize = PML4_SIZE;
-
-/// Offset to kernel heap
-pub const KERNEL_HEAP_OFFSET: usize = KERNEL_OFFSET - PML4_SIZE;
-pub const KERNEL_HEAP_PML4: usize = (KERNEL_HEAP_OFFSET & PML4_MASK) / PML4_SIZE;
-/// Size of kernel heap
-pub const KERNEL_HEAP_SIZE: usize = 32 * 1024 * 1024; // 32 MB
-
 pub const MEMORY_OFFSET: usize = 0;
+pub const KERNEL_OFFSET: usize = 0xffffff00_00000000;
+pub const KERNEL_HEAP_SIZE: usize = 8 * 1024 * 1024; // 8 MB
 
-/// Offset to kernel percpu variables
-//TODO: Use 64-bit fs offset to enable this pub const KERNEL_PERCPU_OFFSET: usize = KERNEL_HEAP_OFFSET - PML4_SIZE;
-pub const KERNEL_PERCPU_OFFSET: usize = 0xC000_0000;
-/// Size of kernel percpu variables
-pub const KERNEL_PERCPU_SIZE: usize = 64 * 1024; // 64 KB
-
-/// Offset to user image
-pub const USER_OFFSET: usize = 0;
-pub const USER_PML4: usize = (USER_OFFSET & PML4_MASK) / PML4_SIZE;
-
-/// Offset to user TCB
-pub const USER_TCB_OFFSET: usize = 0xB000_0000;
-
-/// Offset to user arguments
-pub const USER_ARG_OFFSET: usize = USER_OFFSET + PML4_SIZE / 2;
-
-/// Offset to user heap
-pub const USER_HEAP_OFFSET: usize = USER_OFFSET + PML4_SIZE;
-pub const USER_HEAP_PML4: usize = (USER_HEAP_OFFSET & PML4_MASK) / PML4_SIZE;
-
-/// Offset to user grants
-pub const USER_GRANT_OFFSET: usize = USER_HEAP_OFFSET + PML4_SIZE;
-pub const USER_GRANT_PML4: usize = (USER_GRANT_OFFSET & PML4_MASK) / PML4_SIZE;
-
-/// Offset to user stack
-pub const USER_STACK_OFFSET: usize = USER_GRANT_OFFSET + PML4_SIZE;
-pub const USER_STACK_PML4: usize = (USER_STACK_OFFSET & PML4_MASK) / PML4_SIZE;
-/// Size of user stack
-pub const USER_STACK_SIZE: usize = 1024 * 1024; // 1 MB
-
-/// Offset to user sigstack
-pub const USER_SIGSTACK_OFFSET: usize = USER_STACK_OFFSET + PML4_SIZE;
-pub const USER_SIGSTACK_PML4: usize = (USER_SIGSTACK_OFFSET & PML4_MASK) / PML4_SIZE;
-/// Size of user sigstack
-pub const USER_SIGSTACK_SIZE: usize = 256 * 1024; // 256 KB
-
-/// Offset to user TLS
-pub const USER_TLS_OFFSET: usize = USER_SIGSTACK_OFFSET + PML4_SIZE;
-pub const USER_TLS_PML4: usize = (USER_TLS_OFFSET & PML4_MASK) / PML4_SIZE;
-
-/// Offset to user temporary image (used when cloning)
-pub const USER_TMP_OFFSET: usize = USER_TLS_OFFSET + PML4_SIZE;
-pub const USER_TMP_PML4: usize = (USER_TMP_OFFSET & PML4_MASK) / PML4_SIZE;
-
-/// Offset to user temporary heap (used when cloning)
-pub const USER_TMP_HEAP_OFFSET: usize = USER_TMP_OFFSET + PML4_SIZE;
-pub const USER_TMP_HEAP_PML4: usize = (USER_TMP_HEAP_OFFSET & PML4_MASK) / PML4_SIZE;
-
-/// Offset to user temporary page for grants
-pub const USER_TMP_GRANT_OFFSET: usize = USER_TMP_HEAP_OFFSET + PML4_SIZE;
-pub const USER_TMP_GRANT_PML4: usize = (USER_TMP_GRANT_OFFSET & PML4_MASK) / PML4_SIZE;
-
-/// Offset to user temporary stack (used when cloning)
-pub const USER_TMP_STACK_OFFSET: usize = USER_TMP_GRANT_OFFSET + PML4_SIZE;
-pub const USER_TMP_STACK_PML4: usize = (USER_TMP_STACK_OFFSET & PML4_MASK) / PML4_SIZE;
-
-/// Offset to user temporary sigstack (used when cloning)
-pub const USER_TMP_SIGSTACK_OFFSET: usize = USER_TMP_STACK_OFFSET + PML4_SIZE;
-pub const USER_TMP_SIGSTACK_PML4: usize = (USER_TMP_SIGSTACK_OFFSET & PML4_MASK) / PML4_SIZE;
-
-/// Offset to user temporary tls (used when cloning)
-pub const USER_TMP_TLS_OFFSET: usize = USER_TMP_SIGSTACK_OFFSET + PML4_SIZE;
-pub const USER_TMP_TLS_PML4: usize = (USER_TMP_TLS_OFFSET & PML4_MASK) / PML4_SIZE;
-
-/// Offset for usage in other temporary pages
-pub const USER_TMP_MISC_OFFSET: usize = USER_TMP_TLS_OFFSET + PML4_SIZE;
-pub const USER_TMP_MISC_PML4: usize = (USER_TMP_MISC_OFFSET & PML4_MASK) / PML4_SIZE;
+pub const USER_STACK_OFFSET: usize = 0x00008000_00000000 - USER_STACK_SIZE;
+pub const USER_STACK_SIZE: usize = 8 * 1024 * 1024; // 8 MB, the default config of Linux
diff --git a/kernel/src/arch/x86_64/gdt.rs b/kernel/src/arch/x86_64/gdt.rs
index 90e5037..42c125c 100644
--- a/kernel/src/arch/x86_64/gdt.rs
+++ b/kernel/src/arch/x86_64/gdt.rs
@@ -17,22 +17,19 @@ pub fn init() {
 
 static mut CPUS: [Option<Cpu>; MAX_CPU_NUM] = [
     // TODO: More elegant ?
-    None, None, None, None, None, None, None, None,
-    None, None, None, None, None, None, None, None,
-    None, None, None, None, None, None, None, None,
-    None, None, None, None, None, None, None, None,
-    None, None, None, None, None, None, None, None,
-    None, None, None, None, None, None, None, None,
-    None, None, None, None, None, None, None, None,
-    None, None, None, None, None, None, None, None,
-//    None, None, None, None, None, None, None, None,
-//    None, None, None, None, None, None, None, None,
-//    None, None, None, None, None, None, None, None,
-//    None, None, None, None, None, None, None, None,
-//    None, None, None, None, None, None, None, None,
-//    None, None, None, None, None, None, None, None,
-//    None, None, None, None, None, None, None, None,
-//    None, None, None, None, None, None, None, None,
+    None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None,
+    None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None,
+    None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None,
+    None, None, None, None, None, None, None, None, None, None, None, None, None, None, None,
+    None,
+    //    None, None, None, None, None, None, None, None,
+    //    None, None, None, None, None, None, None, None,
+    //    None, None, None, None, None, None, None, None,
+    //    None, None, None, None, None, None, None, None,
+    //    None, None, None, None, None, None, None, None,
+    //    None, None, None, None, None, None, None, None,
+    //    None, None, None, None, None, None, None, None,
+    //    None, None, None, None, None, None, None, None,
 ];
 
 pub struct Cpu {
@@ -42,10 +39,6 @@ pub struct Cpu {
 }
 
 impl Cpu {
-    pub fn current() -> &'static mut Self {
-        unsafe { CPUS[super::cpu::id()].as_mut().unwrap() }
-    }
-
     fn new() -> Self {
         Cpu {
             gdt: GlobalDescriptorTable::new(),
@@ -75,18 +68,9 @@ impl Cpu {
         set_cs(KCODE_SELECTOR);
         // load TSS
         load_tss(TSS_SELECTOR);
-        // for fast syscall:
-        // store address of TSS to kernel_gsbase
-        let mut kernel_gsbase = Msr::new(0xC0000102);
-        kernel_gsbase.write(&self.tss as *const _ as u64);
-    }
-
-    /// 设置从Ring3跳到Ring0时，自动切换栈的地址
-    ///
-    /// 每次进入用户态前，都要调用此函数，才能保证正确返回内核态
-    pub fn set_ring0_rsp(&mut self, rsp: usize) {
-        trace!("gdt.set_ring0_rsp: {:#x}", rsp);
-        self.tss.privilege_stack_table[0] = VirtAddr::new(rsp as u64);
+        // store address of TSS to GSBase
+        let mut gsbase = Msr::new(0xC0000101);
+        gsbase.write(&self.tss as *const _ as u64);
     }
 }
 
diff --git a/kernel/src/arch/x86_64/interrupt/fast_syscall.rs b/kernel/src/arch/x86_64/interrupt/fast_syscall.rs
index 69170ac..d096b65 100644
--- a/kernel/src/arch/x86_64/interrupt/fast_syscall.rs
+++ b/kernel/src/arch/x86_64/interrupt/fast_syscall.rs
@@ -10,9 +10,9 @@ pub fn init() {
             *flags |= EferFlags::SYSTEM_CALL_EXTENSIONS;
         });
 
-        let mut star = Msr::new(0xC0000081);
-        let mut lstar = Msr::new(0xC0000082);
-        let mut sfmask = Msr::new(0xC0000084);
+        let mut star = Msr::new(0xC0000081); // legacy mode SYSCALL target
+        let mut lstar = Msr::new(0xC0000082); // long mode SYSCALL target
+        let mut sfmask = Msr::new(0xC0000084); // EFLAGS mask for syscall
 
         // flags to clear on syscall
         // copy from Linux 5.0
diff --git a/kernel/src/arch/x86_64/interrupt/handler.rs b/kernel/src/arch/x86_64/interrupt/handler.rs
index 230ee18..de70864 100644
--- a/kernel/src/arch/x86_64/interrupt/handler.rs
+++ b/kernel/src/arch/x86_64/interrupt/handler.rs
@@ -213,9 +213,3 @@ fn invalid_opcode(tf: &mut TrapFrame) {
 fn error(tf: &TrapFrame) {
     crate::trap::error(tf);
 }
-
-#[no_mangle]
-pub unsafe extern "C" fn set_return_rsp(tf: *const TrapFrame) {
-    use crate::arch::gdt::Cpu;
-    Cpu::current().set_ring0_rsp(tf.add(1) as usize);
-}
diff --git a/kernel/src/arch/x86_64/interrupt/trap.asm b/kernel/src/arch/x86_64/interrupt/trap.asm
index d20528d..2f0424b 100644
--- a/kernel/src/arch/x86_64/interrupt/trap.asm
+++ b/kernel/src/arch/x86_64/interrupt/trap.asm
@@ -49,8 +49,10 @@ __alltraps:
 .global trap_ret
 trap_ret:
 
+    # store kernel rsp -> TSS.sp0
     mov rdi, rsp
-    call set_return_rsp
+    add rdi, 720
+    mov gs:[4], rdi
 
     # pop fp state offset
     pop rcx
@@ -104,8 +106,6 @@ syscall_entry:
     # - store rip -> rcx
     # - load rip
 
-    # swap in kernel gs
-    swapgs
     # store user rsp -> scratch at TSS.sp1
     mov gs:[12], rsp
     # load kernel rsp <- TSS.sp0
@@ -119,11 +119,8 @@ syscall_entry:
     push 0          # error_code (dummy)
     push 0          # trap_num (dummy)
 
-    # swap out kernel gs
-    swapgs
-
     # enable interrupt
-    # sti
+    sti
 
     push rax
     push rcx
@@ -173,8 +170,10 @@ syscall_return:
     # disable interrupt
     cli
 
+    # store kernel rsp -> TSS.sp0
     mov rdi, rsp
-    call set_return_rsp
+    add rdi, 720
+    mov gs:[4], rdi
 
     # pop fp state offset
     pop rcx
diff --git a/kernel/src/arch/x86_64/interrupt/trapframe.rs b/kernel/src/arch/x86_64/interrupt/trapframe.rs
index d9ab7f7..fe01ee2 100644
--- a/kernel/src/arch/x86_64/interrupt/trapframe.rs
+++ b/kernel/src/arch/x86_64/interrupt/trapframe.rs
@@ -73,7 +73,7 @@ impl TrapFrame {
         tf.fpstate_offset = 16; // skip restoring for first time
         tf
     }
-    fn new_user_thread(entry_addr: usize, rsp: usize) -> Self {
+    pub fn new_user_thread(entry_addr: usize, rsp: usize) -> Self {
         use crate::arch::gdt;
         let mut tf = TrapFrame::default();
         tf.cs = gdt::UCODE_SELECTOR.0 as usize;
@@ -234,9 +234,4 @@ impl Context {
         }
         .push_at(kstack_top)
     }
-    /// Called at a new user context
-    /// To get the init TrapFrame in sys_exec
-    pub unsafe fn get_init_tf(&self) -> TrapFrame {
-        (*(self.0 as *const InitStack)).tf.clone()
-    }
 }
diff --git a/kernel/src/arch/x86_64/memory.rs b/kernel/src/arch/x86_64/memory.rs
index cadd738..092dc9e 100644
--- a/kernel/src/arch/x86_64/memory.rs
+++ b/kernel/src/arch/x86_64/memory.rs
@@ -2,9 +2,7 @@ use crate::consts::KERNEL_OFFSET;
 use bitmap_allocator::BitAlloc;
 // Depends on kernel
 use super::{BootInfo, MemoryRegionType};
-use crate::memory::{active_table, alloc_frame, init_heap, FRAME_ALLOCATOR};
-use crate::HEAP_ALLOCATOR;
-use alloc::vec::Vec;
+use crate::memory::{active_table, init_heap, FRAME_ALLOCATOR};
 use log::*;
 use once::*;
 use rcore_memory::paging::*;
@@ -15,7 +13,6 @@ pub fn init(boot_info: &BootInfo) {
     init_frame_allocator(boot_info);
     init_device_vm_map();
     init_heap();
-    enlarge_heap();
     info!("memory: init end");
 }
 
@@ -42,30 +39,3 @@ fn init_device_vm_map() {
         .map(KERNEL_OFFSET + 0xfee00000, 0xfee00000)
         .update();
 }
-
-fn enlarge_heap() {
-    let mut page_table = active_table();
-    let mut addrs = Vec::new();
-    let va_offset = KERNEL_OFFSET + 0xe0000000;
-    for i in 0..16384 {
-        let page = alloc_frame().unwrap();
-        let va = KERNEL_OFFSET + 0xe0000000 + page;
-        if let Some((ref mut addr, ref mut len)) = addrs.last_mut() {
-            if *addr - PAGE_SIZE == va {
-                *len += PAGE_SIZE;
-                *addr -= PAGE_SIZE;
-                continue;
-            }
-        }
-        addrs.push((va, PAGE_SIZE));
-    }
-    for (addr, len) in addrs.into_iter() {
-        for va in (addr..(addr + len)).step_by(PAGE_SIZE) {
-            page_table.map(va, va - va_offset).update();
-        }
-        info!("Adding {:#X} {:#X} to heap", addr, len);
-        unsafe {
-            HEAP_ALLOCATOR.lock().init(addr, len);
-        }
-    }
-}
diff --git a/kernel/src/arch/x86_64/mod.rs b/kernel/src/arch/x86_64/mod.rs
index 4b5f56c..f02dd60 100644
--- a/kernel/src/arch/x86_64/mod.rs
+++ b/kernel/src/arch/x86_64/mod.rs
@@ -15,7 +15,7 @@ pub mod rand;
 pub mod syscall;
 pub mod timer;
 
-static AP_CAN_INIT: AtomicBool = ATOMIC_BOOL_INIT;
+static AP_CAN_INIT: AtomicBool = AtomicBool::new(false);
 
 /// The entry point of kernel
 #[no_mangle] // don't mangle the name of this function
@@ -40,26 +40,33 @@ pub extern "C" fn _start(boot_info: &'static BootInfo) -> ! {
     memory::init(boot_info);
 
     // Now heap is available
-    gdt::init();
 
+    // Init GDT
+    gdt::init();
+    //get local apic id of cpu
     cpu::init();
-
+    // Use IOAPIC instead of PIC, use APIC Timer instead of PIT, init serial&keyboard in x86_64
     driver::init();
-
+    // init pci/bus-based devices ,e.g. Intel 10Gb NIC, ...
     crate::drivers::init();
-
+    // init cpu scheduler and process manager, and add user shell app in process manager
     crate::process::init();
-
+    //wake up other CPUs
     AP_CAN_INIT.store(true, Ordering::Relaxed);
-
+    //call the first main function in kernel.
     crate::kmain();
 }
 
 /// The entry point for other processors
 fn other_start() -> ! {
+    // Init trap handling.
     idt::init();
+    // init gdt
     gdt::init();
+    // init local apic
     cpu::init();
+    // setup fast syscall in xv6-64
     interrupt::fast_syscall::init();
+    //call the first main function in kernel.
     crate::kmain();
 }
diff --git a/kernel/src/drivers/block/virtio_blk.rs b/kernel/src/drivers/block/virtio_blk.rs
index c992aaf..fd38b64 100644
--- a/kernel/src/drivers/block/virtio_blk.rs
+++ b/kernel/src/drivers/block/virtio_blk.rs
@@ -12,8 +12,6 @@ use rcore_memory::paging::PageTable;
 use rcore_memory::PAGE_SIZE;
 use volatile::Volatile;
 
-use rcore_fs::dev::BlockDevice;
-
 use crate::drivers::BlockDriver;
 use crate::memory::active_table;
 use crate::sync::SpinNoIrqLock as Mutex;
diff --git a/kernel/src/drivers/console/fonts/font8x16.rs b/kernel/src/drivers/console/fonts/font8x16.rs
index 7513e85..e559db6 100644
--- a/kernel/src/drivers/console/fonts/font8x16.rs
+++ b/kernel/src/drivers/console/fonts/font8x16.rs
@@ -4,4364 +4,8 @@ use super::Font;
 
 pub enum Font8x16 {}
 
-impl Font8x16 {
-    /// font data
-    /// copied from `linux/lib/fonts/font_8x16.c`
-    const DATA: [u8; 256 * 16] = [
-        /* 0 0x00 '^@' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 1 0x01 '^A' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7e, /* 01111110 */
-        0x81, /* 10000001 */
-        0xa5, /* 10100101 */
-        0x81, /* 10000001 */
-        0x81, /* 10000001 */
-        0xbd, /* 10111101 */
-        0x99, /* 10011001 */
-        0x81, /* 10000001 */
-        0x81, /* 10000001 */
-        0x7e, /* 01111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 2 0x02 '^B' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7e, /* 01111110 */
-        0xff, /* 11111111 */
-        0xdb, /* 11011011 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xc3, /* 11000011 */
-        0xe7, /* 11100111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0x7e, /* 01111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 3 0x03 '^C' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x6c, /* 01101100 */
-        0xfe, /* 11111110 */
-        0xfe, /* 11111110 */
-        0xfe, /* 11111110 */
-        0xfe, /* 11111110 */
-        0x7c, /* 01111100 */
-        0x38, /* 00111000 */
-        0x10, /* 00010000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 4 0x04 '^D' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x10, /* 00010000 */
-        0x38, /* 00111000 */
-        0x7c, /* 01111100 */
-        0xfe, /* 11111110 */
-        0x7c, /* 01111100 */
-        0x38, /* 00111000 */
-        0x10, /* 00010000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 5 0x05 '^E' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x3c, /* 00111100 */
-        0x3c, /* 00111100 */
-        0xe7, /* 11100111 */
-        0xe7, /* 11100111 */
-        0xe7, /* 11100111 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x3c, /* 00111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 6 0x06 '^F' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x3c, /* 00111100 */
-        0x7e, /* 01111110 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0x7e, /* 01111110 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x3c, /* 00111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 7 0x07 '^G' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x3c, /* 00111100 */
-        0x3c, /* 00111100 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 8 0x08 '^H' */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xe7, /* 11100111 */
-        0xc3, /* 11000011 */
-        0xc3, /* 11000011 */
-        0xe7, /* 11100111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        /* 9 0x09 '^I' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x3c, /* 00111100 */
-        0x66, /* 01100110 */
-        0x42, /* 01000010 */
-        0x42, /* 01000010 */
-        0x66, /* 01100110 */
-        0x3c, /* 00111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 10 0x0a '^J' */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xc3, /* 11000011 */
-        0x99, /* 10011001 */
-        0xbd, /* 10111101 */
-        0xbd, /* 10111101 */
-        0x99, /* 10011001 */
-        0xc3, /* 11000011 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        /* 11 0x0b '^K' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x1e, /* 00011110 */
-        0x0e, /* 00001110 */
-        0x1a, /* 00011010 */
-        0x32, /* 00110010 */
-        0x78, /* 01111000 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0x78, /* 01111000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 12 0x0c '^L' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x3c, /* 00111100 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x3c, /* 00111100 */
-        0x18, /* 00011000 */
-        0x7e, /* 01111110 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 13 0x0d '^M' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x3f, /* 00111111 */
-        0x33, /* 00110011 */
-        0x3f, /* 00111111 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x70, /* 01110000 */
-        0xf0, /* 11110000 */
-        0xe0, /* 11100000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 14 0x0e '^N' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7f, /* 01111111 */
-        0x63, /* 01100011 */
-        0x7f, /* 01111111 */
-        0x63, /* 01100011 */
-        0x63, /* 01100011 */
-        0x63, /* 01100011 */
-        0x63, /* 01100011 */
-        0x67, /* 01100111 */
-        0xe7, /* 11100111 */
-        0xe6, /* 11100110 */
-        0xc0, /* 11000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 15 0x0f '^O' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0xdb, /* 11011011 */
-        0x3c, /* 00111100 */
-        0xe7, /* 11100111 */
-        0x3c, /* 00111100 */
-        0xdb, /* 11011011 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 16 0x10 '^P' */
-        0x00, /* 00000000 */
-        0x80, /* 10000000 */
-        0xc0, /* 11000000 */
-        0xe0, /* 11100000 */
-        0xf0, /* 11110000 */
-        0xf8, /* 11111000 */
-        0xfe, /* 11111110 */
-        0xf8, /* 11111000 */
-        0xf0, /* 11110000 */
-        0xe0, /* 11100000 */
-        0xc0, /* 11000000 */
-        0x80, /* 10000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 17 0x11 '^Q' */
-        0x00, /* 00000000 */
-        0x02, /* 00000010 */
-        0x06, /* 00000110 */
-        0x0e, /* 00001110 */
-        0x1e, /* 00011110 */
-        0x3e, /* 00111110 */
-        0xfe, /* 11111110 */
-        0x3e, /* 00111110 */
-        0x1e, /* 00011110 */
-        0x0e, /* 00001110 */
-        0x06, /* 00000110 */
-        0x02, /* 00000010 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 18 0x12 '^R' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x3c, /* 00111100 */
-        0x7e, /* 01111110 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x7e, /* 01111110 */
-        0x3c, /* 00111100 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 19 0x13 '^S' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x00, /* 00000000 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 20 0x14 '^T' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7f, /* 01111111 */
-        0xdb, /* 11011011 */
-        0xdb, /* 11011011 */
-        0xdb, /* 11011011 */
-        0x7b, /* 01111011 */
-        0x1b, /* 00011011 */
-        0x1b, /* 00011011 */
-        0x1b, /* 00011011 */
-        0x1b, /* 00011011 */
-        0x1b, /* 00011011 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 21 0x15 '^U' */
-        0x00, /* 00000000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0x60, /* 01100000 */
-        0x38, /* 00111000 */
-        0x6c, /* 01101100 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x6c, /* 01101100 */
-        0x38, /* 00111000 */
-        0x0c, /* 00001100 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 22 0x16 '^V' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xfe, /* 11111110 */
-        0xfe, /* 11111110 */
-        0xfe, /* 11111110 */
-        0xfe, /* 11111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 23 0x17 '^W' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x3c, /* 00111100 */
-        0x7e, /* 01111110 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x7e, /* 01111110 */
-        0x3c, /* 00111100 */
-        0x18, /* 00011000 */
-        0x7e, /* 01111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 24 0x18 '^X' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x3c, /* 00111100 */
-        0x7e, /* 01111110 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 25 0x19 '^Y' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x7e, /* 01111110 */
-        0x3c, /* 00111100 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 26 0x1a '^Z' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x0c, /* 00001100 */
-        0xfe, /* 11111110 */
-        0x0c, /* 00001100 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 27 0x1b '^[' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x30, /* 00110000 */
-        0x60, /* 01100000 */
-        0xfe, /* 11111110 */
-        0x60, /* 01100000 */
-        0x30, /* 00110000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 28 0x1c '^\' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xfe, /* 11111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 29 0x1d '^]' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x28, /* 00101000 */
-        0x6c, /* 01101100 */
-        0xfe, /* 11111110 */
-        0x6c, /* 01101100 */
-        0x28, /* 00101000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 30 0x1e '^^' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x10, /* 00010000 */
-        0x38, /* 00111000 */
-        0x38, /* 00111000 */
-        0x7c, /* 01111100 */
-        0x7c, /* 01111100 */
-        0xfe, /* 11111110 */
-        0xfe, /* 11111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 31 0x1f '^_' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xfe, /* 11111110 */
-        0xfe, /* 11111110 */
-        0x7c, /* 01111100 */
-        0x7c, /* 01111100 */
-        0x38, /* 00111000 */
-        0x38, /* 00111000 */
-        0x10, /* 00010000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 32 0x20 ' ' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 33 0x21 '!' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x3c, /* 00111100 */
-        0x3c, /* 00111100 */
-        0x3c, /* 00111100 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 34 0x22 '"' */
-        0x00, /* 00000000 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x24, /* 00100100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 35 0x23 '#' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x6c, /* 01101100 */
-        0x6c, /* 01101100 */
-        0xfe, /* 11111110 */
-        0x6c, /* 01101100 */
-        0x6c, /* 01101100 */
-        0x6c, /* 01101100 */
-        0xfe, /* 11111110 */
-        0x6c, /* 01101100 */
-        0x6c, /* 01101100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 36 0x24 '$' */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0xc2, /* 11000010 */
-        0xc0, /* 11000000 */
-        0x7c, /* 01111100 */
-        0x06, /* 00000110 */
-        0x06, /* 00000110 */
-        0x86, /* 10000110 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 37 0x25 '%' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xc2, /* 11000010 */
-        0xc6, /* 11000110 */
-        0x0c, /* 00001100 */
-        0x18, /* 00011000 */
-        0x30, /* 00110000 */
-        0x60, /* 01100000 */
-        0xc6, /* 11000110 */
-        0x86, /* 10000110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 38 0x26 '&' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x38, /* 00111000 */
-        0x6c, /* 01101100 */
-        0x6c, /* 01101100 */
-        0x38, /* 00111000 */
-        0x76, /* 01110110 */
-        0xdc, /* 11011100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0x76, /* 01110110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 39 0x27 ''' */
-        0x00, /* 00000000 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x60, /* 01100000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 40 0x28 '(' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x0c, /* 00001100 */
-        0x18, /* 00011000 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x18, /* 00011000 */
-        0x0c, /* 00001100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 41 0x29 ')' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x30, /* 00110000 */
-        0x18, /* 00011000 */
-        0x0c, /* 00001100 */
-        0x0c, /* 00001100 */
-        0x0c, /* 00001100 */
-        0x0c, /* 00001100 */
-        0x0c, /* 00001100 */
-        0x0c, /* 00001100 */
-        0x18, /* 00011000 */
-        0x30, /* 00110000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 42 0x2a '*' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x66, /* 01100110 */
-        0x3c, /* 00111100 */
-        0xff, /* 11111111 */
-        0x3c, /* 00111100 */
-        0x66, /* 01100110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 43 0x2b '+' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x7e, /* 01111110 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 44 0x2c ',' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x30, /* 00110000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 45 0x2d '-' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xfe, /* 11111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 46 0x2e '.' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 47 0x2f '/' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x02, /* 00000010 */
-        0x06, /* 00000110 */
-        0x0c, /* 00001100 */
-        0x18, /* 00011000 */
-        0x30, /* 00110000 */
-        0x60, /* 01100000 */
-        0xc0, /* 11000000 */
-        0x80, /* 10000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 48 0x30 '0' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x38, /* 00111000 */
-        0x6c, /* 01101100 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xd6, /* 11010110 */
-        0xd6, /* 11010110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x6c, /* 01101100 */
-        0x38, /* 00111000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 49 0x31 '1' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x38, /* 00111000 */
-        0x78, /* 01111000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x7e, /* 01111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 50 0x32 '2' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0x06, /* 00000110 */
-        0x0c, /* 00001100 */
-        0x18, /* 00011000 */
-        0x30, /* 00110000 */
-        0x60, /* 01100000 */
-        0xc0, /* 11000000 */
-        0xc6, /* 11000110 */
-        0xfe, /* 11111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 51 0x33 '3' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0x06, /* 00000110 */
-        0x06, /* 00000110 */
-        0x3c, /* 00111100 */
-        0x06, /* 00000110 */
-        0x06, /* 00000110 */
-        0x06, /* 00000110 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 52 0x34 '4' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x0c, /* 00001100 */
-        0x1c, /* 00011100 */
-        0x3c, /* 00111100 */
-        0x6c, /* 01101100 */
-        0xcc, /* 11001100 */
-        0xfe, /* 11111110 */
-        0x0c, /* 00001100 */
-        0x0c, /* 00001100 */
-        0x0c, /* 00001100 */
-        0x1e, /* 00011110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 53 0x35 '5' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xfe, /* 11111110 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xfc, /* 11111100 */
-        0x06, /* 00000110 */
-        0x06, /* 00000110 */
-        0x06, /* 00000110 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 54 0x36 '6' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x38, /* 00111000 */
-        0x60, /* 01100000 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xfc, /* 11111100 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 55 0x37 '7' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xfe, /* 11111110 */
-        0xc6, /* 11000110 */
-        0x06, /* 00000110 */
-        0x06, /* 00000110 */
-        0x0c, /* 00001100 */
-        0x18, /* 00011000 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 56 0x38 '8' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 57 0x39 '9' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x7e, /* 01111110 */
-        0x06, /* 00000110 */
-        0x06, /* 00000110 */
-        0x06, /* 00000110 */
-        0x0c, /* 00001100 */
-        0x78, /* 01111000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 58 0x3a ':' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 59 0x3b ';' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x30, /* 00110000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 60 0x3c '<' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x06, /* 00000110 */
-        0x0c, /* 00001100 */
-        0x18, /* 00011000 */
-        0x30, /* 00110000 */
-        0x60, /* 01100000 */
-        0x30, /* 00110000 */
-        0x18, /* 00011000 */
-        0x0c, /* 00001100 */
-        0x06, /* 00000110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 61 0x3d '=' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7e, /* 01111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7e, /* 01111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 62 0x3e '>' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x60, /* 01100000 */
-        0x30, /* 00110000 */
-        0x18, /* 00011000 */
-        0x0c, /* 00001100 */
-        0x06, /* 00000110 */
-        0x0c, /* 00001100 */
-        0x18, /* 00011000 */
-        0x30, /* 00110000 */
-        0x60, /* 01100000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 63 0x3f '?' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x0c, /* 00001100 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 64 0x40 '@' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xde, /* 11011110 */
-        0xde, /* 11011110 */
-        0xde, /* 11011110 */
-        0xdc, /* 11011100 */
-        0xc0, /* 11000000 */
-        0x7c, /* 01111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 65 0x41 'A' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x10, /* 00010000 */
-        0x38, /* 00111000 */
-        0x6c, /* 01101100 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xfe, /* 11111110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 66 0x42 'B' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xfc, /* 11111100 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x7c, /* 01111100 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0xfc, /* 11111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 67 0x43 'C' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x3c, /* 00111100 */
-        0x66, /* 01100110 */
-        0xc2, /* 11000010 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xc2, /* 11000010 */
-        0x66, /* 01100110 */
-        0x3c, /* 00111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 68 0x44 'D' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xf8, /* 11111000 */
-        0x6c, /* 01101100 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x6c, /* 01101100 */
-        0xf8, /* 11111000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 69 0x45 'E' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xfe, /* 11111110 */
-        0x66, /* 01100110 */
-        0x62, /* 01100010 */
-        0x68, /* 01101000 */
-        0x78, /* 01111000 */
-        0x68, /* 01101000 */
-        0x60, /* 01100000 */
-        0x62, /* 01100010 */
-        0x66, /* 01100110 */
-        0xfe, /* 11111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 70 0x46 'F' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xfe, /* 11111110 */
-        0x66, /* 01100110 */
-        0x62, /* 01100010 */
-        0x68, /* 01101000 */
-        0x78, /* 01111000 */
-        0x68, /* 01101000 */
-        0x60, /* 01100000 */
-        0x60, /* 01100000 */
-        0x60, /* 01100000 */
-        0xf0, /* 11110000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 71 0x47 'G' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x3c, /* 00111100 */
-        0x66, /* 01100110 */
-        0xc2, /* 11000010 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xde, /* 11011110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x66, /* 01100110 */
-        0x3a, /* 00111010 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 72 0x48 'H' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xfe, /* 11111110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 73 0x49 'I' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x3c, /* 00111100 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x3c, /* 00111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 74 0x4a 'J' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x1e, /* 00011110 */
-        0x0c, /* 00001100 */
-        0x0c, /* 00001100 */
-        0x0c, /* 00001100 */
-        0x0c, /* 00001100 */
-        0x0c, /* 00001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0x78, /* 01111000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 75 0x4b 'K' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xe6, /* 11100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x6c, /* 01101100 */
-        0x78, /* 01111000 */
-        0x78, /* 01111000 */
-        0x6c, /* 01101100 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0xe6, /* 11100110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 76 0x4c 'L' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xf0, /* 11110000 */
-        0x60, /* 01100000 */
-        0x60, /* 01100000 */
-        0x60, /* 01100000 */
-        0x60, /* 01100000 */
-        0x60, /* 01100000 */
-        0x60, /* 01100000 */
-        0x62, /* 01100010 */
-        0x66, /* 01100110 */
-        0xfe, /* 11111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 77 0x4d 'M' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xc6, /* 11000110 */
-        0xee, /* 11101110 */
-        0xfe, /* 11111110 */
-        0xfe, /* 11111110 */
-        0xd6, /* 11010110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 78 0x4e 'N' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xc6, /* 11000110 */
-        0xe6, /* 11100110 */
-        0xf6, /* 11110110 */
-        0xfe, /* 11111110 */
-        0xde, /* 11011110 */
-        0xce, /* 11001110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 79 0x4f 'O' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 80 0x50 'P' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xfc, /* 11111100 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x7c, /* 01111100 */
-        0x60, /* 01100000 */
-        0x60, /* 01100000 */
-        0x60, /* 01100000 */
-        0x60, /* 01100000 */
-        0xf0, /* 11110000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 81 0x51 'Q' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xd6, /* 11010110 */
-        0xde, /* 11011110 */
-        0x7c, /* 01111100 */
-        0x0c, /* 00001100 */
-        0x0e, /* 00001110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 82 0x52 'R' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xfc, /* 11111100 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x7c, /* 01111100 */
-        0x6c, /* 01101100 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0xe6, /* 11100110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 83 0x53 'S' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x60, /* 01100000 */
-        0x38, /* 00111000 */
-        0x0c, /* 00001100 */
-        0x06, /* 00000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 84 0x54 'T' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7e, /* 01111110 */
-        0x7e, /* 01111110 */
-        0x5a, /* 01011010 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x3c, /* 00111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 85 0x55 'U' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 86 0x56 'V' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x6c, /* 01101100 */
-        0x38, /* 00111000 */
-        0x10, /* 00010000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 87 0x57 'W' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xd6, /* 11010110 */
-        0xd6, /* 11010110 */
-        0xd6, /* 11010110 */
-        0xfe, /* 11111110 */
-        0xee, /* 11101110 */
-        0x6c, /* 01101100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 88 0x58 'X' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x6c, /* 01101100 */
-        0x7c, /* 01111100 */
-        0x38, /* 00111000 */
-        0x38, /* 00111000 */
-        0x7c, /* 01111100 */
-        0x6c, /* 01101100 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 89 0x59 'Y' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x3c, /* 00111100 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x3c, /* 00111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 90 0x5a 'Z' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xfe, /* 11111110 */
-        0xc6, /* 11000110 */
-        0x86, /* 10000110 */
-        0x0c, /* 00001100 */
-        0x18, /* 00011000 */
-        0x30, /* 00110000 */
-        0x60, /* 01100000 */
-        0xc2, /* 11000010 */
-        0xc6, /* 11000110 */
-        0xfe, /* 11111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 91 0x5b '[' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x3c, /* 00111100 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x3c, /* 00111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 92 0x5c '\' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x80, /* 10000000 */
-        0xc0, /* 11000000 */
-        0xe0, /* 11100000 */
-        0x70, /* 01110000 */
-        0x38, /* 00111000 */
-        0x1c, /* 00011100 */
-        0x0e, /* 00001110 */
-        0x06, /* 00000110 */
-        0x02, /* 00000010 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 93 0x5d ']' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x3c, /* 00111100 */
-        0x0c, /* 00001100 */
-        0x0c, /* 00001100 */
-        0x0c, /* 00001100 */
-        0x0c, /* 00001100 */
-        0x0c, /* 00001100 */
-        0x0c, /* 00001100 */
-        0x0c, /* 00001100 */
-        0x0c, /* 00001100 */
-        0x3c, /* 00111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 94 0x5e '^' */
-        0x10, /* 00010000 */
-        0x38, /* 00111000 */
-        0x6c, /* 01101100 */
-        0xc6, /* 11000110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 95 0x5f '_' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xff, /* 11111111 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 96 0x60 '`' */
-        0x00, /* 00000000 */
-        0x30, /* 00110000 */
-        0x18, /* 00011000 */
-        0x0c, /* 00001100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 97 0x61 'a' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x78, /* 01111000 */
-        0x0c, /* 00001100 */
-        0x7c, /* 01111100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0x76, /* 01110110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 98 0x62 'b' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xe0, /* 11100000 */
-        0x60, /* 01100000 */
-        0x60, /* 01100000 */
-        0x78, /* 01111000 */
-        0x6c, /* 01101100 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x7c, /* 01111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 99 0x63 'c' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 100 0x64 'd' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x1c, /* 00011100 */
-        0x0c, /* 00001100 */
-        0x0c, /* 00001100 */
-        0x3c, /* 00111100 */
-        0x6c, /* 01101100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0x76, /* 01110110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 101 0x65 'e' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0xfe, /* 11111110 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 102 0x66 'f' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x1c, /* 00011100 */
-        0x36, /* 00110110 */
-        0x32, /* 00110010 */
-        0x30, /* 00110000 */
-        0x78, /* 01111000 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x78, /* 01111000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 103 0x67 'g' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x76, /* 01110110 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0x7c, /* 01111100 */
-        0x0c, /* 00001100 */
-        0xcc, /* 11001100 */
-        0x78, /* 01111000 */
-        0x00, /* 00000000 */
-        /* 104 0x68 'h' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xe0, /* 11100000 */
-        0x60, /* 01100000 */
-        0x60, /* 01100000 */
-        0x6c, /* 01101100 */
-        0x76, /* 01110110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0xe6, /* 11100110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 105 0x69 'i' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x38, /* 00111000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x3c, /* 00111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 106 0x6a 'j' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x06, /* 00000110 */
-        0x06, /* 00000110 */
-        0x00, /* 00000000 */
-        0x0e, /* 00001110 */
-        0x06, /* 00000110 */
-        0x06, /* 00000110 */
-        0x06, /* 00000110 */
-        0x06, /* 00000110 */
-        0x06, /* 00000110 */
-        0x06, /* 00000110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x3c, /* 00111100 */
-        0x00, /* 00000000 */
-        /* 107 0x6b 'k' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xe0, /* 11100000 */
-        0x60, /* 01100000 */
-        0x60, /* 01100000 */
-        0x66, /* 01100110 */
-        0x6c, /* 01101100 */
-        0x78, /* 01111000 */
-        0x78, /* 01111000 */
-        0x6c, /* 01101100 */
-        0x66, /* 01100110 */
-        0xe6, /* 11100110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 108 0x6c 'l' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x38, /* 00111000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x3c, /* 00111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 109 0x6d 'm' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xec, /* 11101100 */
-        0xfe, /* 11111110 */
-        0xd6, /* 11010110 */
-        0xd6, /* 11010110 */
-        0xd6, /* 11010110 */
-        0xd6, /* 11010110 */
-        0xc6, /* 11000110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 110 0x6e 'n' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xdc, /* 11011100 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 111 0x6f 'o' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 112 0x70 'p' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xdc, /* 11011100 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x7c, /* 01111100 */
-        0x60, /* 01100000 */
-        0x60, /* 01100000 */
-        0xf0, /* 11110000 */
-        0x00, /* 00000000 */
-        /* 113 0x71 'q' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x76, /* 01110110 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0x7c, /* 01111100 */
-        0x0c, /* 00001100 */
-        0x0c, /* 00001100 */
-        0x1e, /* 00011110 */
-        0x00, /* 00000000 */
-        /* 114 0x72 'r' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xdc, /* 11011100 */
-        0x76, /* 01110110 */
-        0x66, /* 01100110 */
-        0x60, /* 01100000 */
-        0x60, /* 01100000 */
-        0x60, /* 01100000 */
-        0xf0, /* 11110000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 115 0x73 's' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0x60, /* 01100000 */
-        0x38, /* 00111000 */
-        0x0c, /* 00001100 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 116 0x74 't' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x10, /* 00010000 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0xfc, /* 11111100 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x36, /* 00110110 */
-        0x1c, /* 00011100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 117 0x75 'u' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0x76, /* 01110110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 118 0x76 'v' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x6c, /* 01101100 */
-        0x38, /* 00111000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 119 0x77 'w' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xd6, /* 11010110 */
-        0xd6, /* 11010110 */
-        0xd6, /* 11010110 */
-        0xfe, /* 11111110 */
-        0x6c, /* 01101100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 120 0x78 'x' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xc6, /* 11000110 */
-        0x6c, /* 01101100 */
-        0x38, /* 00111000 */
-        0x38, /* 00111000 */
-        0x38, /* 00111000 */
-        0x6c, /* 01101100 */
-        0xc6, /* 11000110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 121 0x79 'y' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x7e, /* 01111110 */
-        0x06, /* 00000110 */
-        0x0c, /* 00001100 */
-        0xf8, /* 11111000 */
-        0x00, /* 00000000 */
-        /* 122 0x7a 'z' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xfe, /* 11111110 */
-        0xcc, /* 11001100 */
-        0x18, /* 00011000 */
-        0x30, /* 00110000 */
-        0x60, /* 01100000 */
-        0xc6, /* 11000110 */
-        0xfe, /* 11111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 123 0x7b '{' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x0e, /* 00001110 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x70, /* 01110000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x0e, /* 00001110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 124 0x7c '|' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 125 0x7d '}' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x70, /* 01110000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x0e, /* 00001110 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x70, /* 01110000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 126 0x7e '~' */
-        0x00, /* 00000000 */
-        0x76, /* 01110110 */
-        0xdc, /* 11011100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 127 0x7f '' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x10, /* 00010000 */
-        0x38, /* 00111000 */
-        0x6c, /* 01101100 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xfe, /* 11111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 128 0x80 'Ç' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x3c, /* 00111100 */
-        0x66, /* 01100110 */
-        0xc2, /* 11000010 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xc2, /* 11000010 */
-        0x66, /* 01100110 */
-        0x3c, /* 00111100 */
-        0x18, /* 00011000 */
-        0x70, /* 01110000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 129 0x81 'ü' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xcc, /* 11001100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0x76, /* 01110110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 130 0x82 'é' */
-        0x00, /* 00000000 */
-        0x0c, /* 00001100 */
-        0x18, /* 00011000 */
-        0x30, /* 00110000 */
-        0x00, /* 00000000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0xfe, /* 11111110 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 131 0x83 'â' */
-        0x00, /* 00000000 */
-        0x10, /* 00010000 */
-        0x38, /* 00111000 */
-        0x6c, /* 01101100 */
-        0x00, /* 00000000 */
-        0x78, /* 01111000 */
-        0x0c, /* 00001100 */
-        0x7c, /* 01111100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0x76, /* 01110110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 132 0x84 'ä' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xcc, /* 11001100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x78, /* 01111000 */
-        0x0c, /* 00001100 */
-        0x7c, /* 01111100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0x76, /* 01110110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 133 0x85 'à' */
-        0x00, /* 00000000 */
-        0x60, /* 01100000 */
-        0x30, /* 00110000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x78, /* 01111000 */
-        0x0c, /* 00001100 */
-        0x7c, /* 01111100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0x76, /* 01110110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 134 0x86 'å' */
-        0x00, /* 00000000 */
-        0x38, /* 00111000 */
-        0x6c, /* 01101100 */
-        0x38, /* 00111000 */
-        0x00, /* 00000000 */
-        0x78, /* 01111000 */
-        0x0c, /* 00001100 */
-        0x7c, /* 01111100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0x76, /* 01110110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 135 0x87 'ç' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0x18, /* 00011000 */
-        0x70, /* 01110000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 136 0x88 'ê' */
-        0x00, /* 00000000 */
-        0x10, /* 00010000 */
-        0x38, /* 00111000 */
-        0x6c, /* 01101100 */
-        0x00, /* 00000000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0xfe, /* 11111110 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 137 0x89 'ë' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xc6, /* 11000110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0xfe, /* 11111110 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 138 0x8a 'è' */
-        0x00, /* 00000000 */
-        0x60, /* 01100000 */
-        0x30, /* 00110000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0xfe, /* 11111110 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 139 0x8b 'ï' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x66, /* 01100110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x38, /* 00111000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x3c, /* 00111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 140 0x8c 'î' */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x3c, /* 00111100 */
-        0x66, /* 01100110 */
-        0x00, /* 00000000 */
-        0x38, /* 00111000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x3c, /* 00111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 141 0x8d 'ì' */
-        0x00, /* 00000000 */
-        0x60, /* 01100000 */
-        0x30, /* 00110000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x38, /* 00111000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x3c, /* 00111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 142 0x8e 'Ä' */
-        0x00, /* 00000000 */
-        0xc6, /* 11000110 */
-        0x00, /* 00000000 */
-        0x10, /* 00010000 */
-        0x38, /* 00111000 */
-        0x6c, /* 01101100 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xfe, /* 11111110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 143 0x8f 'Å' */
-        0x38, /* 00111000 */
-        0x6c, /* 01101100 */
-        0x38, /* 00111000 */
-        0x10, /* 00010000 */
-        0x38, /* 00111000 */
-        0x6c, /* 01101100 */
-        0xc6, /* 11000110 */
-        0xfe, /* 11111110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 144 0x90 'É' */
-        0x0c, /* 00001100 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0xfe, /* 11111110 */
-        0x66, /* 01100110 */
-        0x62, /* 01100010 */
-        0x68, /* 01101000 */
-        0x78, /* 01111000 */
-        0x68, /* 01101000 */
-        0x62, /* 01100010 */
-        0x66, /* 01100110 */
-        0xfe, /* 11111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 145 0x91 'æ' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xec, /* 11101100 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x7e, /* 01111110 */
-        0xd8, /* 11011000 */
-        0xd8, /* 11011000 */
-        0x6e, /* 01101110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 146 0x92 'Æ' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x3e, /* 00111110 */
-        0x6c, /* 01101100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xfe, /* 11111110 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xce, /* 11001110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 147 0x93 'ô' */
-        0x00, /* 00000000 */
-        0x10, /* 00010000 */
-        0x38, /* 00111000 */
-        0x6c, /* 01101100 */
-        0x00, /* 00000000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 148 0x94 'ö' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xc6, /* 11000110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 149 0x95 'ò' */
-        0x00, /* 00000000 */
-        0x60, /* 01100000 */
-        0x30, /* 00110000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 150 0x96 'û' */
-        0x00, /* 00000000 */
-        0x30, /* 00110000 */
-        0x78, /* 01111000 */
-        0xcc, /* 11001100 */
-        0x00, /* 00000000 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0x76, /* 01110110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 151 0x97 'ù' */
-        0x00, /* 00000000 */
-        0x60, /* 01100000 */
-        0x30, /* 00110000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0x76, /* 01110110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 152 0x98 'ÿ' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xc6, /* 11000110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x7e, /* 01111110 */
-        0x06, /* 00000110 */
-        0x0c, /* 00001100 */
-        0x78, /* 01111000 */
-        0x00, /* 00000000 */
-        /* 153 0x99 'Ö' */
-        0x00, /* 00000000 */
-        0xc6, /* 11000110 */
-        0x00, /* 00000000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 154 0x9a 'Ü' */
-        0x00, /* 00000000 */
-        0xc6, /* 11000110 */
-        0x00, /* 00000000 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 155 0x9b '¢' */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 156 0x9c '£' */
-        0x00, /* 00000000 */
-        0x38, /* 00111000 */
-        0x6c, /* 01101100 */
-        0x64, /* 01100100 */
-        0x60, /* 01100000 */
-        0xf0, /* 11110000 */
-        0x60, /* 01100000 */
-        0x60, /* 01100000 */
-        0x60, /* 01100000 */
-        0x60, /* 01100000 */
-        0xe6, /* 11100110 */
-        0xfc, /* 11111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 157 0x9d '¥' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x3c, /* 00111100 */
-        0x18, /* 00011000 */
-        0x7e, /* 01111110 */
-        0x18, /* 00011000 */
-        0x7e, /* 01111110 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 158 0x9e '₧' */
-        0x00, /* 00000000 */
-        0xf8, /* 11111000 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xf8, /* 11111000 */
-        0xc4, /* 11000100 */
-        0xcc, /* 11001100 */
-        0xde, /* 11011110 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xc6, /* 11000110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 159 0x9f 'ƒ' */
-        0x00, /* 00000000 */
-        0x0e, /* 00001110 */
-        0x1b, /* 00011011 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x7e, /* 01111110 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0xd8, /* 11011000 */
-        0x70, /* 01110000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 160 0xa0 'á' */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x30, /* 00110000 */
-        0x60, /* 01100000 */
-        0x00, /* 00000000 */
-        0x78, /* 01111000 */
-        0x0c, /* 00001100 */
-        0x7c, /* 01111100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0x76, /* 01110110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 161 0xa1 'í' */
-        0x00, /* 00000000 */
-        0x0c, /* 00001100 */
-        0x18, /* 00011000 */
-        0x30, /* 00110000 */
-        0x00, /* 00000000 */
-        0x38, /* 00111000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x3c, /* 00111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 162 0xa2 'ó' */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x30, /* 00110000 */
-        0x60, /* 01100000 */
-        0x00, /* 00000000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 163 0xa3 'ú' */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x30, /* 00110000 */
-        0x60, /* 01100000 */
-        0x00, /* 00000000 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0x76, /* 01110110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 164 0xa4 'ñ' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x76, /* 01110110 */
-        0xdc, /* 11011100 */
-        0x00, /* 00000000 */
-        0xdc, /* 11011100 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 165 0xa5 'Ñ' */
-        0x76, /* 01110110 */
-        0xdc, /* 11011100 */
-        0x00, /* 00000000 */
-        0xc6, /* 11000110 */
-        0xe6, /* 11100110 */
-        0xf6, /* 11110110 */
-        0xfe, /* 11111110 */
-        0xde, /* 11011110 */
-        0xce, /* 11001110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 166 0xa6 'ª' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x3c, /* 00111100 */
-        0x6c, /* 01101100 */
-        0x6c, /* 01101100 */
-        0x3e, /* 00111110 */
-        0x00, /* 00000000 */
-        0x7e, /* 01111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 167 0xa7 'º' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x38, /* 00111000 */
-        0x6c, /* 01101100 */
-        0x6c, /* 01101100 */
-        0x38, /* 00111000 */
-        0x00, /* 00000000 */
-        0x7c, /* 01111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 168 0xa8 '¿' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x00, /* 00000000 */
-        0x30, /* 00110000 */
-        0x30, /* 00110000 */
-        0x60, /* 01100000 */
-        0xc0, /* 11000000 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x7c, /* 01111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 169 0xa9 '⌐' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xfe, /* 11111110 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 170 0xaa '¬' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xfe, /* 11111110 */
-        0x06, /* 00000110 */
-        0x06, /* 00000110 */
-        0x06, /* 00000110 */
-        0x06, /* 00000110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 171 0xab '½' */
-        0x00, /* 00000000 */
-        0x60, /* 01100000 */
-        0xe0, /* 11100000 */
-        0x62, /* 01100010 */
-        0x66, /* 01100110 */
-        0x6c, /* 01101100 */
-        0x18, /* 00011000 */
-        0x30, /* 00110000 */
-        0x60, /* 01100000 */
-        0xdc, /* 11011100 */
-        0x86, /* 10000110 */
-        0x0c, /* 00001100 */
-        0x18, /* 00011000 */
-        0x3e, /* 00111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 172 0xac '¼' */
-        0x00, /* 00000000 */
-        0x60, /* 01100000 */
-        0xe0, /* 11100000 */
-        0x62, /* 01100010 */
-        0x66, /* 01100110 */
-        0x6c, /* 01101100 */
-        0x18, /* 00011000 */
-        0x30, /* 00110000 */
-        0x66, /* 01100110 */
-        0xce, /* 11001110 */
-        0x9a, /* 10011010 */
-        0x3f, /* 00111111 */
-        0x06, /* 00000110 */
-        0x06, /* 00000110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 173 0xad '¡' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x3c, /* 00111100 */
-        0x3c, /* 00111100 */
-        0x3c, /* 00111100 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 174 0xae '«' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x36, /* 00110110 */
-        0x6c, /* 01101100 */
-        0xd8, /* 11011000 */
-        0x6c, /* 01101100 */
-        0x36, /* 00110110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 175 0xaf '»' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xd8, /* 11011000 */
-        0x6c, /* 01101100 */
-        0x36, /* 00110110 */
-        0x6c, /* 01101100 */
-        0xd8, /* 11011000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 176 0xb0 '░' */
-        0x11, /* 00010001 */
-        0x44, /* 01000100 */
-        0x11, /* 00010001 */
-        0x44, /* 01000100 */
-        0x11, /* 00010001 */
-        0x44, /* 01000100 */
-        0x11, /* 00010001 */
-        0x44, /* 01000100 */
-        0x11, /* 00010001 */
-        0x44, /* 01000100 */
-        0x11, /* 00010001 */
-        0x44, /* 01000100 */
-        0x11, /* 00010001 */
-        0x44, /* 01000100 */
-        0x11, /* 00010001 */
-        0x44, /* 01000100 */
-        /* 177 0xb1 '▒' */
-        0x55, /* 01010101 */
-        0xaa, /* 10101010 */
-        0x55, /* 01010101 */
-        0xaa, /* 10101010 */
-        0x55, /* 01010101 */
-        0xaa, /* 10101010 */
-        0x55, /* 01010101 */
-        0xaa, /* 10101010 */
-        0x55, /* 01010101 */
-        0xaa, /* 10101010 */
-        0x55, /* 01010101 */
-        0xaa, /* 10101010 */
-        0x55, /* 01010101 */
-        0xaa, /* 10101010 */
-        0x55, /* 01010101 */
-        0xaa, /* 10101010 */
-        /* 178 0xb2 '▓' */
-        0xdd, /* 11011101 */
-        0x77, /* 01110111 */
-        0xdd, /* 11011101 */
-        0x77, /* 01110111 */
-        0xdd, /* 11011101 */
-        0x77, /* 01110111 */
-        0xdd, /* 11011101 */
-        0x77, /* 01110111 */
-        0xdd, /* 11011101 */
-        0x77, /* 01110111 */
-        0xdd, /* 11011101 */
-        0x77, /* 01110111 */
-        0xdd, /* 11011101 */
-        0x77, /* 01110111 */
-        0xdd, /* 11011101 */
-        0x77, /* 01110111 */
-        /* 179 0xb3 '│' */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        /* 180 0xb4 '┤' */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0xf8, /* 11111000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        /* 181 0xb5 '╡' */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0xf8, /* 11111000 */
-        0x18, /* 00011000 */
-        0xf8, /* 11111000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        /* 182 0xb6 '╢' */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0xf6, /* 11110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        /* 183 0xb7 '╖' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xfe, /* 11111110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        /* 184 0xb8 '╕' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xf8, /* 11111000 */
-        0x18, /* 00011000 */
-        0xf8, /* 11111000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        /* 185 0xb9 '╣' */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0xf6, /* 11110110 */
-        0x06, /* 00000110 */
-        0xf6, /* 11110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        /* 186 0xba '║' */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        /* 187 0xbb '╗' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xfe, /* 11111110 */
-        0x06, /* 00000110 */
-        0xf6, /* 11110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        /* 188 0xbc '╝' */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0xf6, /* 11110110 */
-        0x06, /* 00000110 */
-        0xfe, /* 11111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 189 0xbd '╜' */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0xfe, /* 11111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 190 0xbe '╛' */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0xf8, /* 11111000 */
-        0x18, /* 00011000 */
-        0xf8, /* 11111000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 191 0xbf '┐' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xf8, /* 11111000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        /* 192 0xc0 '└' */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x1f, /* 00011111 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 193 0xc1 '┴' */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0xff, /* 11111111 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 194 0xc2 '┬' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xff, /* 11111111 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        /* 195 0xc3 '├' */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x1f, /* 00011111 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        /* 196 0xc4 '─' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xff, /* 11111111 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 197 0xc5 '┼' */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0xff, /* 11111111 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        /* 198 0xc6 '╞' */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x1f, /* 00011111 */
-        0x18, /* 00011000 */
-        0x1f, /* 00011111 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        /* 199 0xc7 '╟' */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x37, /* 00110111 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        /* 200 0xc8 '╚' */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x37, /* 00110111 */
-        0x30, /* 00110000 */
-        0x3f, /* 00111111 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 201 0xc9 '╔' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x3f, /* 00111111 */
-        0x30, /* 00110000 */
-        0x37, /* 00110111 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        /* 202 0xca '╩' */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0xf7, /* 11110111 */
-        0x00, /* 00000000 */
-        0xff, /* 11111111 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 203 0xcb '╦' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xff, /* 11111111 */
-        0x00, /* 00000000 */
-        0xf7, /* 11110111 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        /* 204 0xcc '╠' */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x37, /* 00110111 */
-        0x30, /* 00110000 */
-        0x37, /* 00110111 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        /* 205 0xcd '═' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xff, /* 11111111 */
-        0x00, /* 00000000 */
-        0xff, /* 11111111 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 206 0xce '╬' */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0xf7, /* 11110111 */
-        0x00, /* 00000000 */
-        0xf7, /* 11110111 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        /* 207 0xcf '╧' */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0xff, /* 11111111 */
-        0x00, /* 00000000 */
-        0xff, /* 11111111 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 208 0xd0 '╨' */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0xff, /* 11111111 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 209 0xd1 '╤' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xff, /* 11111111 */
-        0x00, /* 00000000 */
-        0xff, /* 11111111 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        /* 210 0xd2 '╥' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xff, /* 11111111 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        /* 211 0xd3 '╙' */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x3f, /* 00111111 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 212 0xd4 '╘' */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x1f, /* 00011111 */
-        0x18, /* 00011000 */
-        0x1f, /* 00011111 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 213 0xd5 '╒' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x1f, /* 00011111 */
-        0x18, /* 00011000 */
-        0x1f, /* 00011111 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        /* 214 0xd6 '╓' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x3f, /* 00111111 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        /* 215 0xd7 '╫' */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0xff, /* 11111111 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        /* 216 0xd8 '╪' */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0xff, /* 11111111 */
-        0x18, /* 00011000 */
-        0xff, /* 11111111 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        /* 217 0xd9 '┘' */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0xf8, /* 11111000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 218 0xda '┌' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x1f, /* 00011111 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        /* 219 0xdb '█' */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        /* 220 0xdc '▄' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        /* 221 0xdd '▌' */
-        0xf0, /* 11110000 */
-        0xf0, /* 11110000 */
-        0xf0, /* 11110000 */
-        0xf0, /* 11110000 */
-        0xf0, /* 11110000 */
-        0xf0, /* 11110000 */
-        0xf0, /* 11110000 */
-        0xf0, /* 11110000 */
-        0xf0, /* 11110000 */
-        0xf0, /* 11110000 */
-        0xf0, /* 11110000 */
-        0xf0, /* 11110000 */
-        0xf0, /* 11110000 */
-        0xf0, /* 11110000 */
-        0xf0, /* 11110000 */
-        0xf0, /* 11110000 */
-        /* 222 0xde '▐' */
-        0x0f, /* 00001111 */
-        0x0f, /* 00001111 */
-        0x0f, /* 00001111 */
-        0x0f, /* 00001111 */
-        0x0f, /* 00001111 */
-        0x0f, /* 00001111 */
-        0x0f, /* 00001111 */
-        0x0f, /* 00001111 */
-        0x0f, /* 00001111 */
-        0x0f, /* 00001111 */
-        0x0f, /* 00001111 */
-        0x0f, /* 00001111 */
-        0x0f, /* 00001111 */
-        0x0f, /* 00001111 */
-        0x0f, /* 00001111 */
-        0x0f, /* 00001111 */
-        /* 223 0xdf '▀' */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0xff, /* 11111111 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 224 0xe0 'α' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x76, /* 01110110 */
-        0xdc, /* 11011100 */
-        0xd8, /* 11011000 */
-        0xd8, /* 11011000 */
-        0xd8, /* 11011000 */
-        0xdc, /* 11011100 */
-        0x76, /* 01110110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 225 0xe1 'ß' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x78, /* 01111000 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xcc, /* 11001100 */
-        0xd8, /* 11011000 */
-        0xcc, /* 11001100 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xcc, /* 11001100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 226 0xe2 'Γ' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xfe, /* 11111110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0xc0, /* 11000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 227 0xe3 'π' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xfe, /* 11111110 */
-        0x6c, /* 01101100 */
-        0x6c, /* 01101100 */
-        0x6c, /* 01101100 */
-        0x6c, /* 01101100 */
-        0x6c, /* 01101100 */
-        0x6c, /* 01101100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 228 0xe4 'Σ' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xfe, /* 11111110 */
-        0xc6, /* 11000110 */
-        0x60, /* 01100000 */
-        0x30, /* 00110000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x30, /* 00110000 */
-        0x60, /* 01100000 */
-        0xc6, /* 11000110 */
-        0xfe, /* 11111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 229 0xe5 'σ' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7e, /* 01111110 */
-        0xd8, /* 11011000 */
-        0xd8, /* 11011000 */
-        0xd8, /* 11011000 */
-        0xd8, /* 11011000 */
-        0xd8, /* 11011000 */
-        0x70, /* 01110000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 230 0xe6 'µ' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x7c, /* 01111100 */
-        0x60, /* 01100000 */
-        0x60, /* 01100000 */
-        0xc0, /* 11000000 */
-        0x00, /* 00000000 */
-        /* 231 0xe7 'τ' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x76, /* 01110110 */
-        0xdc, /* 11011100 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 232 0xe8 'Φ' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7e, /* 01111110 */
-        0x18, /* 00011000 */
-        0x3c, /* 00111100 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x3c, /* 00111100 */
-        0x18, /* 00011000 */
-        0x7e, /* 01111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 233 0xe9 'Θ' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x38, /* 00111000 */
-        0x6c, /* 01101100 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xfe, /* 11111110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x6c, /* 01101100 */
-        0x38, /* 00111000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 234 0xea 'Ω' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x38, /* 00111000 */
-        0x6c, /* 01101100 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x6c, /* 01101100 */
-        0x6c, /* 01101100 */
-        0x6c, /* 01101100 */
-        0x6c, /* 01101100 */
-        0xee, /* 11101110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 235 0xeb 'δ' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x1e, /* 00011110 */
-        0x30, /* 00110000 */
-        0x18, /* 00011000 */
-        0x0c, /* 00001100 */
-        0x3e, /* 00111110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x66, /* 01100110 */
-        0x3c, /* 00111100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 236 0xec '∞' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7e, /* 01111110 */
-        0xdb, /* 11011011 */
-        0xdb, /* 11011011 */
-        0xdb, /* 11011011 */
-        0x7e, /* 01111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 237 0xed 'φ' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x03, /* 00000011 */
-        0x06, /* 00000110 */
-        0x7e, /* 01111110 */
-        0xdb, /* 11011011 */
-        0xdb, /* 11011011 */
-        0xf3, /* 11110011 */
-        0x7e, /* 01111110 */
-        0x60, /* 01100000 */
-        0xc0, /* 11000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 238 0xee 'ε' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x1c, /* 00011100 */
-        0x30, /* 00110000 */
-        0x60, /* 01100000 */
-        0x60, /* 01100000 */
-        0x7c, /* 01111100 */
-        0x60, /* 01100000 */
-        0x60, /* 01100000 */
-        0x60, /* 01100000 */
-        0x30, /* 00110000 */
-        0x1c, /* 00011100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 239 0xef '∩' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7c, /* 01111100 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0xc6, /* 11000110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 240 0xf0 '≡' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xfe, /* 11111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xfe, /* 11111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0xfe, /* 11111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 241 0xf1 '±' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x7e, /* 01111110 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7e, /* 01111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 242 0xf2 '≥' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x30, /* 00110000 */
-        0x18, /* 00011000 */
-        0x0c, /* 00001100 */
-        0x06, /* 00000110 */
-        0x0c, /* 00001100 */
-        0x18, /* 00011000 */
-        0x30, /* 00110000 */
-        0x00, /* 00000000 */
-        0x7e, /* 01111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 243 0xf3 '≤' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x0c, /* 00001100 */
-        0x18, /* 00011000 */
-        0x30, /* 00110000 */
-        0x60, /* 01100000 */
-        0x30, /* 00110000 */
-        0x18, /* 00011000 */
-        0x0c, /* 00001100 */
-        0x00, /* 00000000 */
-        0x7e, /* 01111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 244 0xf4 '⌠' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x0e, /* 00001110 */
-        0x1b, /* 00011011 */
-        0x1b, /* 00011011 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        /* 245 0xf5 '⌡' */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0xd8, /* 11011000 */
-        0xd8, /* 11011000 */
-        0xd8, /* 11011000 */
-        0x70, /* 01110000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 246 0xf6 '÷' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x7e, /* 01111110 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 247 0xf7 '≈' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x76, /* 01110110 */
-        0xdc, /* 11011100 */
-        0x00, /* 00000000 */
-        0x76, /* 01110110 */
-        0xdc, /* 11011100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 248 0xf8 '°' */
-        0x00, /* 00000000 */
-        0x38, /* 00111000 */
-        0x6c, /* 01101100 */
-        0x6c, /* 01101100 */
-        0x38, /* 00111000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 249 0xf9 '·' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 250 0xfa '•' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x18, /* 00011000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 251 0xfb '√' */
-        0x00, /* 00000000 */
-        0x0f, /* 00001111 */
-        0x0c, /* 00001100 */
-        0x0c, /* 00001100 */
-        0x0c, /* 00001100 */
-        0x0c, /* 00001100 */
-        0x0c, /* 00001100 */
-        0xec, /* 11101100 */
-        0x6c, /* 01101100 */
-        0x6c, /* 01101100 */
-        0x3c, /* 00111100 */
-        0x1c, /* 00011100 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 252 0xfc 'ⁿ' */
-        0x00, /* 00000000 */
-        0x6c, /* 01101100 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x36, /* 00110110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 253 0xfd '²' */
-        0x00, /* 00000000 */
-        0x3c, /* 00111100 */
-        0x66, /* 01100110 */
-        0x0c, /* 00001100 */
-        0x18, /* 00011000 */
-        0x32, /* 00110010 */
-        0x7e, /* 01111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 254 0xfe '■' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x7e, /* 01111110 */
-        0x7e, /* 01111110 */
-        0x7e, /* 01111110 */
-        0x7e, /* 01111110 */
-        0x7e, /* 01111110 */
-        0x7e, /* 01111110 */
-        0x7e, /* 01111110 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        /* 255 0xff ' ' */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-        0x00, /* 00000000 */
-    ];
-}
+// https://github.com/jamwaffles/embedded-graphics/blob/0ec4fc09c55aee733fb9d9cd6525749b8e15766e/embedded-graphics/data/font8x16_1bpp.raw
+const FONT_IMAGE: &'static [u8] = include_bytes!("font8x16_1bpp.raw");
 
 impl Font for Font8x16 {
     const HEIGHT: usize = 16;
@@ -4372,6 +16,42 @@ impl Font for Font8x16 {
 
     #[inline]
     fn get(byte: u8, x: usize, y: usize) -> bool {
-        Self::DATA[byte as usize * 16 + y] & (1 << (7 - x)) != 0
+        const FONT_IMAGE_WIDTH: usize = 240;
+        let char_per_row = FONT_IMAGE_WIDTH / Self::WIDTH;
+
+        // Char _code_ offset from first char, most often a space
+        // E.g. first char = ' ' (32), target char = '!' (33), offset = 33 - 32 = 1
+        let char_offset = char_offset(byte as char) as usize;
+        let row = char_offset / char_per_row;
+
+        // Top left corner of character, in pixels
+        let char_x = (char_offset - (row * char_per_row)) * Self::WIDTH;
+        let char_y = row * Self::HEIGHT;
+
+        // Bit index
+        // = X pixel offset for char
+        // + Character row offset (row 0 = 0, row 1 = (192 * 8) = 1536)
+        // + X offset for the pixel block that comprises this char
+        // + Y offset for pixel block
+        let bitmap_bit_index = char_x + x + (FONT_IMAGE_WIDTH * (char_y + y));
+
+        let bitmap_byte = bitmap_bit_index / 8;
+        let bitmap_bit = 7 - (bitmap_bit_index % 8);
+
+        FONT_IMAGE[bitmap_byte] & ((1 << bitmap_bit) as u8) != 0
+    }
+}
+
+fn char_offset(c: char) -> u32 {
+    let fallback = '?' as u32 - ' ' as u32;
+    if c < ' ' {
+        return fallback;
+    }
+    if c <= '~' {
+        return c as u32 - ' ' as u32;
+    }
+    if c < '¡' || c > 'ÿ' {
+        return fallback;
     }
+    c as u32 - ' ' as u32 - 34
 }
diff --git a/kernel/src/drivers/console/fonts/font8x16_1bpp.raw b/kernel/src/drivers/console/fonts/font8x16_1bpp.raw
new file mode 100644
index 0000000..372f994
Binary files /dev/null and b/kernel/src/drivers/console/fonts/font8x16_1bpp.raw differ
diff --git a/kernel/src/drivers/mod.rs b/kernel/src/drivers/mod.rs
index 104a567..de559ce 100644
--- a/kernel/src/drivers/mod.rs
+++ b/kernel/src/drivers/mod.rs
@@ -72,21 +72,21 @@ pub trait Driver: Send + Sync {
     }
 
     // send an ethernet frame, only use it when necessary
-    fn send(&self, data: &[u8]) -> Option<usize> {
+    fn send(&self, _data: &[u8]) -> Option<usize> {
         unimplemented!("not a net driver")
     }
 
     // get mac address from ip address in arp table
-    fn get_arp(&self, ip: IpAddress) -> Option<EthernetAddress> {
+    fn get_arp(&self, _ip: IpAddress) -> Option<EthernetAddress> {
         unimplemented!("not a net driver")
     }
 
     // block related drivers should implement these
-    fn read_block(&self, block_id: usize, buf: &mut [u8]) -> bool {
+    fn read_block(&self, _block_id: usize, _buf: &mut [u8]) -> bool {
         unimplemented!("not a block driver")
     }
 
-    fn write_block(&self, block_id: usize, buf: &[u8]) -> bool {
+    fn write_block(&self, _block_id: usize, _buf: &[u8]) -> bool {
         unimplemented!("not a block driver")
     }
 }
diff --git a/kernel/src/drivers/net/ixgbe.rs b/kernel/src/drivers/net/ixgbe.rs
index 115a0bd..139d313 100644
--- a/kernel/src/drivers/net/ixgbe.rs
+++ b/kernel/src/drivers/net/ixgbe.rs
@@ -15,7 +15,6 @@ use smoltcp::wire::EthernetAddress;
 use smoltcp::wire::*;
 use smoltcp::Result;
 
-use crate::memory::active_table;
 use crate::net::SOCKETS;
 use crate::sync::FlagsGuard;
 use crate::sync::SpinNoIrqLock as Mutex;
diff --git a/kernel/src/drivers/net/virtio_net.rs b/kernel/src/drivers/net/virtio_net.rs
index d149ec3..40c0d31 100644
--- a/kernel/src/drivers/net/virtio_net.rs
+++ b/kernel/src/drivers/net/virtio_net.rs
@@ -2,7 +2,6 @@ use alloc::alloc::{GlobalAlloc, Layout};
 use alloc::format;
 use alloc::string::String;
 use alloc::sync::Arc;
-use alloc::vec::Vec;
 use core::mem::size_of;
 use core::slice;
 
diff --git a/kernel/src/fs/file.rs b/kernel/src/fs/file.rs
index 5e1b84f..3979c4d 100644
--- a/kernel/src/fs/file.rs
+++ b/kernel/src/fs/file.rs
@@ -116,4 +116,8 @@ impl FileHandle {
     pub fn io_control(&self, cmd: u32, arg: usize) -> Result<()> {
         self.inode.io_control(cmd, arg)
     }
+
+    pub fn inode(&self) -> Arc<INode> {
+        self.inode.clone()
+    }
 }
diff --git a/kernel/src/fs/mod.rs b/kernel/src/fs/mod.rs
index 1b772a9..256ce5e 100644
--- a/kernel/src/fs/mod.rs
+++ b/kernel/src/fs/mod.rs
@@ -10,12 +10,14 @@ pub use self::file::*;
 pub use self::file_like::*;
 pub use self::pipe::Pipe;
 pub use self::stdio::{STDIN, STDOUT};
+pub use self::pseudo::*;
 
 mod device;
 mod file;
 mod file_like;
 mod pipe;
 mod stdio;
+mod pseudo;
 
 /// Hard link user programs
 #[cfg(feature = "link_user")]
diff --git a/kernel/src/fs/pseudo.rs b/kernel/src/fs/pseudo.rs
new file mode 100644
index 0000000..6da58c0
--- /dev/null
+++ b/kernel/src/fs/pseudo.rs
@@ -0,0 +1,78 @@
+//! Pseudo file system INode
+
+use alloc::{string::String, sync::Arc, vec::Vec};
+use core::any::Any;
+
+use rcore_fs::vfs::*;
+
+pub struct Pseudo {
+    content: Vec<u8>,
+    type_: FileType,
+}
+
+impl Pseudo {
+    pub fn new(s: &str, type_: FileType) -> Self {
+        Pseudo {
+            content: Vec::from(s.as_bytes()),
+            type_
+        }
+    }
+}
+
+// TODO: better way to provide default impl?
+macro_rules! impl_inode {
+    () => {
+        fn set_metadata(&self, _metadata: &Metadata) -> Result<()> { Ok(()) }
+        fn sync_all(&self) -> Result<()> { Ok(()) }
+        fn sync_data(&self) -> Result<()> { Ok(()) }
+        fn resize(&self, _len: usize) -> Result<()> { Err(FsError::NotSupported) }
+        fn create(&self, _name: &str, _type_: FileType, _mode: u32) -> Result<Arc<INode>> { Err(FsError::NotDir) }
+        fn unlink(&self, _name: &str) -> Result<()> { Err(FsError::NotDir) }
+        fn link(&self, _name: &str, _other: &Arc<INode>) -> Result<()> { Err(FsError::NotDir) }
+        fn move_(&self, _old_name: &str, _target: &Arc<INode>, _new_name: &str) -> Result<()> { Err(FsError::NotDir) }
+        fn find(&self, _name: &str) -> Result<Arc<INode>> { Err(FsError::NotDir) }
+        fn get_entry(&self, _id: usize) -> Result<String> { Err(FsError::NotDir) }
+        fn io_control(&self, cmd: u32, data: usize) -> Result<()> { Err(FsError::NotSupported) }
+        fn fs(&self) -> Arc<FileSystem> { unimplemented!() }
+        fn as_any_ref(&self) -> &Any { self }
+    };
+}
+
+impl INode for Pseudo {
+    fn read_at(&self, offset: usize, buf: &mut [u8]) -> Result<usize> {
+        if offset >= self.content.len() {
+            return Ok(0);
+        }
+        let len = (self.content.len() - offset).min(buf.len());
+        buf[..len].copy_from_slice(&self.content[offset..offset + len]);
+        Ok(len)
+    }
+    fn write_at(&self, _offset: usize, _buf: &[u8]) -> Result<usize> {
+        Err(FsError::NotSupported)
+    }
+    fn poll(&self) -> Result<PollStatus> {
+        Ok(PollStatus {
+            read: true,
+            write: false,
+            error: false,
+        })
+    }
+    fn metadata(&self) -> Result<Metadata> {
+        Ok(Metadata {
+            dev: 0,
+            inode: 0,
+            size: self.content.len(),
+            blk_size: 0,
+            blocks: 0,
+            atime: Timespec { sec: 0, nsec: 0 },
+            mtime: Timespec { sec: 0, nsec: 0 },
+            ctime: Timespec { sec: 0, nsec: 0 },
+            type_: self.type_,
+            mode: 0,
+            nlinks: 0,
+            uid: 0,
+            gid: 0,
+        })
+    }
+    impl_inode!();
+}
diff --git a/kernel/src/fs/stdio.rs b/kernel/src/fs/stdio.rs
index 6250011..3967e41 100644
--- a/kernel/src/fs/stdio.rs
+++ b/kernel/src/fs/stdio.rs
@@ -20,8 +20,15 @@ impl Stdin {
         self.pushed.notify_one();
     }
     pub fn pop(&self) -> char {
-        // QEMU v3.0 don't support M-mode external interrupt (bug?)
-        // So we have to use polling.
+        #[cfg(feature = "board_k210")]
+        loop {
+            // polling
+            let c = crate::arch::io::getchar();
+            if c != '\0' {
+                return c;
+            }
+        }
+        #[cfg(not(feature = "board_k210"))]
         loop {
             let ret = self.buf.lock().pop_front();
             match ret {
@@ -43,10 +50,31 @@ lazy_static! {
     pub static ref STDOUT: Arc<Stdout> = Arc::new(Stdout::default());
 }
 
+// 32bits total, command in lower 16bits, size of the parameter structure in the lower 14 bits of the upper 16 bits
+// higher 2 bits: 01 = write, 10 = read
+
+#[cfg(not(target_arch = "mips"))]
 const TCGETS: u32 = 0x5401;
+#[cfg(target_arch = "mips")]
+const TCGETS: u32 = 0x540D;
+
+#[cfg(not(target_arch = "mips"))]
 const TIOCGPGRP: u32 = 0x540F;
+// _IOR('t', 119, int)
+#[cfg(target_arch = "mips")]
+const TIOCGPGRP: u32 = 0x4_004_74_77;
+
+#[cfg(not(target_arch = "mips"))]
 const TIOCSPGRP: u32 = 0x5410;
+// _IOW('t', 118, int)
+#[cfg(target_arch = "mips")]
+const TIOCSPGRP: u32 = 0x8_004_74_76;
+
+#[cfg(not(target_arch = "mips"))]
 const TIOCGWINSZ: u32 = 0x5413;
+// _IOR('t', 104, struct winsize)
+#[cfg(target_arch = "mips")]
+const TIOCGWINSZ: u32 = 0x4_008_74_68;
 
 // TODO: better way to provide default impl?
 macro_rules! impl_inode {
diff --git a/kernel/src/logging.rs b/kernel/src/logging.rs
index b832d50..838abe5 100644
--- a/kernel/src/logging.rs
+++ b/kernel/src/logging.rs
@@ -14,13 +14,12 @@ pub fn init() {
     static LOGGER: SimpleLogger = SimpleLogger;
     log::set_logger(&LOGGER).unwrap();
     log::set_max_level(match option_env!("LOG") {
-        Some("off") => LevelFilter::Off,
         Some("error") => LevelFilter::Error,
         Some("warn") => LevelFilter::Warn,
         Some("info") => LevelFilter::Info,
         Some("debug") => LevelFilter::Debug,
         Some("trace") => LevelFilter::Trace,
-        _ => LevelFilter::Warn,
+        _ => LevelFilter::Off,
     });
 }
 
diff --git a/kernel/src/memory.rs b/kernel/src/memory.rs
index a631437..8367cbc 100644
--- a/kernel/src/memory.rs
+++ b/kernel/src/memory.rs
@@ -1,3 +1,17 @@
+//! Define the FrameAllocator for physical memory
+//! x86_64      --  64GB
+//! AARCH64/MIPS/RV --  1GB
+//! K210(rv64)  --  8MB
+//! NOTICE:
+//! type FrameAlloc = bitmap_allocator::BitAllocXXX
+//! KSTACK_SIZE         -- 16KB
+//!
+//! KERNEL_HEAP_SIZE:
+//! x86-64              -- 32MB
+//! AARCH64/RV64        -- 8MB
+//! MIPS/RV32           -- 2MB
+//! mipssim/malta(MIPS) -- 10MB
+
 use super::HEAP_ALLOCATOR;
 pub use crate::arch::paging::*;
 use crate::consts::MEMORY_OFFSET;
@@ -16,14 +30,22 @@ pub type MemorySet = rcore_memory::memory_set::MemorySet<InactivePageTable0>;
 #[cfg(target_arch = "x86_64")]
 pub type FrameAlloc = bitmap_allocator::BitAlloc16M;
 
-// RISCV has 8M memory
-#[cfg(any(target_arch = "riscv32", target_arch = "riscv64"))]
-pub type FrameAlloc = bitmap_allocator::BitAlloc4K;
-
-// Raspberry Pi 3 has 1G memory
-#[cfg(any(target_arch = "aarch64", target_arch = "mips"))]
+// RISCV, ARM, MIPS has 1G memory
+#[cfg(all(
+    any(
+        target_arch = "riscv32",
+        target_arch = "riscv64",
+        target_arch = "aarch64",
+        target_arch = "mips"
+    ),
+    not(feature = "board_k210")
+))]
 pub type FrameAlloc = bitmap_allocator::BitAlloc1M;
 
+// K210 has 8M memory
+#[cfg(feature = "board_k210")]
+pub type FrameAlloc = bitmap_allocator::BitAlloc4K;
+
 lazy_static! {
     pub static ref FRAME_ALLOCATOR: SpinNoIrqLock<FrameAlloc> =
         SpinNoIrqLock::new(FrameAlloc::default());
@@ -77,17 +99,17 @@ pub fn dealloc_frame(target: usize) {
 }
 
 pub struct KernelStack(usize);
-const STACK_SIZE: usize = 0x8000;
+const KSTACK_SIZE: usize = 0x4000; //16KB
 
 impl KernelStack {
     pub fn new() -> Self {
         use alloc::alloc::{alloc, Layout};
         let bottom =
-            unsafe { alloc(Layout::from_size_align(STACK_SIZE, STACK_SIZE).unwrap()) } as usize;
+            unsafe { alloc(Layout::from_size_align(KSTACK_SIZE, KSTACK_SIZE).unwrap()) } as usize;
         KernelStack(bottom)
     }
     pub fn top(&self) -> usize {
-        self.0 + STACK_SIZE
+        self.0 + KSTACK_SIZE
     }
 }
 
@@ -97,7 +119,7 @@ impl Drop for KernelStack {
         unsafe {
             dealloc(
                 self.0 as _,
-                Layout::from_size_align(STACK_SIZE, STACK_SIZE).unwrap(),
+                Layout::from_size_align(KSTACK_SIZE, KSTACK_SIZE).unwrap(),
             );
         }
     }
diff --git a/kernel/src/net/structs.rs b/kernel/src/net/structs.rs
index 7dcb754..b905fde 100644
--- a/kernel/src/net/structs.rs
+++ b/kernel/src/net/structs.rs
@@ -55,7 +55,7 @@ pub trait Socket: Send + Sync {
     fn write(&self, data: &[u8], sendto_endpoint: Option<Endpoint>) -> SysResult;
     fn poll(&self) -> (bool, bool, bool); // (in, out, err)
     fn connect(&mut self, endpoint: Endpoint) -> SysResult;
-    fn bind(&mut self, endpoint: Endpoint) -> SysResult {
+    fn bind(&mut self, _endpoint: Endpoint) -> SysResult {
         Err(SysError::EINVAL)
     }
     fn listen(&mut self) -> SysResult {
@@ -73,11 +73,11 @@ pub trait Socket: Send + Sync {
     fn remote_endpoint(&self) -> Option<Endpoint> {
         None
     }
-    fn setsockopt(&mut self, level: usize, opt: usize, data: &[u8]) -> SysResult {
+    fn setsockopt(&mut self, _level: usize, _opt: usize, _data: &[u8]) -> SysResult {
         warn!("setsockopt is unimplemented");
         Ok(0)
     }
-    fn ioctl(&mut self, request: usize, arg1: usize, arg2: usize, arg3: usize) -> SysResult {
+    fn ioctl(&mut self, _request: usize, _arg1: usize, _arg2: usize, _arg3: usize) -> SysResult {
         warn!("ioctl is unimplemented for this socket");
         Ok(0)
     }
diff --git a/kernel/src/process/abi.rs b/kernel/src/process/abi.rs
index 913fb1a..dcaa428 100644
--- a/kernel/src/process/abi.rs
+++ b/kernel/src/process/abi.rs
@@ -5,7 +5,7 @@ use core::ptr::null;
 
 pub struct ProcInitInfo {
     pub args: Vec<String>,
-    pub envs: BTreeMap<String, String>,
+    pub envs: Vec<String>,
     pub auxv: BTreeMap<u8, usize>,
 }
 
@@ -19,10 +19,8 @@ impl ProcInitInfo {
         let envs: Vec<_> = self
             .envs
             .iter()
-            .map(|(key, value)| {
-                writer.push_str(value.as_str());
-                writer.push_slice(&[b"="]);
-                writer.push_slice(key.as_bytes());
+            .map(|arg| {
+                writer.push_str(arg.as_str());
                 writer.sp
             })
             .collect();
diff --git a/kernel/src/process/mod.rs b/kernel/src/process/mod.rs
index fca611d..d9908a9 100644
--- a/kernel/src/process/mod.rs
+++ b/kernel/src/process/mod.rs
@@ -20,45 +20,93 @@ pub fn init() {
         }
     }
 
-    crate::shell::run_user_shell();
+    crate::shell::add_user_shell();
 
     info!("process: init end");
 }
 
 static PROCESSORS: [Processor; MAX_CPU_NUM] = [
     // TODO: More elegant ?
-    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-//    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-//    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-//    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-//    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-//    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-//    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-//    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-//    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-//    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-//    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-//    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-//    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-//    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-//    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-//    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
-//    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    Processor::new(),
+    //    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
+    //    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
+    //    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
+    //    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
+    //    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
+    //    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
+    //    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
+    //    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
+    //    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
+    //    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
+    //    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
+    //    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
+    //    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
+    //    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
+    //    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
+    //    Processor::new(),    Processor::new(),    Processor::new(),    Processor::new(),
 ];
 
 /// Get current process
diff --git a/kernel/src/process/structs.rs b/kernel/src/process/structs.rs
index 0bf6781..2ec8dcf 100644
--- a/kernel/src/process/structs.rs
+++ b/kernel/src/process/structs.rs
@@ -14,11 +14,14 @@ use xmas_elf::{
 
 use crate::arch::interrupt::{Context, TrapFrame};
 use crate::fs::{FileHandle, FileLike, INodeExt, OpenOptions, FOLLOW_MAX_DEPTH};
-use crate::memory::{ByFrame, GlobalFrameAlloc, KernelStack, MemoryAttr, MemorySet};
-use crate::net::SOCKETS;
+use crate::memory::{
+    ByFrame, Delay, File, GlobalFrameAlloc, KernelStack, MemoryAttr, MemorySet, Read,
+};
 use crate::sync::{Condvar, SpinNoIrqLock as Mutex};
 
 use super::abi::{self, ProcInitInfo};
+use core::mem::uninitialized;
+use rcore_fs::vfs::INode;
 
 // TODO: avoid pub
 pub struct Thread {
@@ -32,41 +35,23 @@ pub struct Thread {
 
 /// Pid type
 /// For strong type separation
-#[derive(Clone, PartialEq, Eq, PartialOrd, Ord)]
-pub struct Pid(Option<usize>);
+#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord)]
+pub struct Pid(usize);
 
 impl Pid {
-    pub fn uninitialized() -> Self {
-        Pid(None)
-    }
-
-    /// Return if it was uninitialized before this call
-    /// When returning true, it usually means this is the first thread
-    pub fn set_if_uninitialized(&mut self, tid: Tid) -> bool {
-        if self.0 == None {
-            self.0 = Some(tid as usize);
-            true
-        } else {
-            false
-        }
-    }
-
     pub fn get(&self) -> usize {
-        self.0.unwrap()
+        self.0
     }
 
     /// Return whether this pid represents the init process
     pub fn is_init(&self) -> bool {
-        self.0 == Some(0)
+        self.0 == 0
     }
 }
 
 impl fmt::Display for Pid {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        match self.0 {
-            Some(pid) => write!(f, "{}", pid),
-            None => write!(f, "None"),
-        }
+        write!(f, "{}", self.0)
     }
 }
 
@@ -75,6 +60,7 @@ pub struct Process {
     pub vm: MemorySet,
     pub files: BTreeMap<usize, FileLike>,
     pub cwd: String,
+    pub exec_path: String,
     futexes: BTreeMap<usize, Arc<Condvar>>,
 
     // relationship
@@ -103,21 +89,9 @@ impl rcore_thread::Context for Thread {
     }
 
     fn set_tid(&mut self, tid: Tid) {
-        // set pid=tid if unspecified
         let mut proc = self.proc.lock();
-        if proc.pid.set_if_uninitialized(tid) {
-            // first thread in the process
-            // link to its ppid
-            if let Some(parent) = &proc.parent {
-                let mut parent = parent.lock();
-                parent.children.push(Arc::downgrade(&self.proc));
-            }
-        }
         // add it to threads
         proc.threads.push(tid);
-        PROCESSES
-            .write()
-            .insert(proc.pid.get(), Arc::downgrade(&self.proc));
     }
 }
 
@@ -126,10 +100,8 @@ impl Thread {
     pub unsafe fn new_init() -> Box<Thread> {
         Box::new(Thread {
             context: Context::null(),
-            kstack: KernelStack::new(),
-            clear_child_tid: 0,
-            // safety: this field will never be used
-            proc: core::mem::uninitialized(),
+            // safety: other fields will never be used
+            ..core::mem::uninitialized()
         })
     }
 
@@ -142,60 +114,77 @@ impl Thread {
             kstack,
             clear_child_tid: 0,
             // TODO: kernel thread should not have a process
-            proc: Arc::new(Mutex::new(Process {
+            proc: Process {
                 vm,
                 files: BTreeMap::default(),
                 cwd: String::from("/"),
+                exec_path: String::new(),
                 futexes: BTreeMap::default(),
-                pid: Pid::uninitialized(),
+                pid: Pid(0),
                 parent: None,
                 children: Vec::new(),
                 threads: Vec::new(),
                 child_exit: Arc::new(Condvar::new()),
                 child_exit_code: BTreeMap::new(),
-            })),
+            }
+            .add_to_table(),
         })
     }
 
-    /// Make a new user process from ELF `data`
-    pub fn new_user<'a, Iter>(data: &[u8], exec_path: &str, args: Iter) -> Box<Thread>
-    where
-        Iter: Iterator<Item = &'a str>,
-    {
+    /// Construct virtual memory of a new user process from ELF `data`.
+    /// Return `(MemorySet, entry_point, ustack_top)`
+    pub fn new_user_vm(
+        inode: &Arc<INode>,
+        exec_path: &str,
+        mut args: Vec<String>,
+        envs: Vec<String>,
+    ) -> Result<(MemorySet, usize, usize), &'static str> {
+        // Read ELF header
+        // 0x3c0: magic number from ld-musl.so
+        let mut data: [u8; 0x3c0] = unsafe { uninitialized() };
+        inode
+            .read_at(0, &mut data)
+            .map_err(|_| "failed to read from INode")?;
+
         // Parse ELF
-        let elf = ElfFile::new(data).expect("failed to read elf");
+        let elf = ElfFile::new(&data)?;
 
         // Check ELF type
         match elf.header.pt2.type_().as_type() {
             header::Type::Executable => {}
             header::Type::SharedObject => {}
-            _ => panic!("ELF is not executable or shared object"),
+            _ => return Err("ELF is not executable or shared object"),
+        }
+
+        // Check ELF arch
+        match elf.header.pt2.machine().as_machine() {
+            #[cfg(target_arch = "x86_64")]
+            header::Machine::X86_64 => {}
+            #[cfg(target_arch = "aarch64")]
+            header::Machine::AArch64 => {}
+            #[cfg(any(target_arch = "riscv32", target_arch = "riscv64"))]
+            header::Machine::Other(243) => {}
+            #[cfg(target_arch = "mips")]
+            header::Machine::Mips => {}
+            machine @ _ => return Err("invalid ELF arch"),
         }
 
-        // Check interpreter
+        // Check interpreter (for dynamic link)
         if let Ok(loader_path) = elf.get_interpreter() {
             // assuming absolute path
-            if let Ok(inode) = crate::fs::ROOT_INODE.lookup_follow(loader_path, FOLLOW_MAX_DEPTH) {
-                if let Ok(buf) = inode.read_as_vec() {
-                    debug!("using loader {}", &loader_path);
-                    // Elf loader should not have INTERP
-                    // No infinite loop
-                    let mut new_args: Vec<&str> = args.collect();
-                    new_args.insert(0, loader_path);
-                    new_args.insert(1, exec_path);
-                    new_args.remove(2);
-                    warn!("loader args: {:?}", new_args);
-                    return Thread::new_user(buf.as_slice(), exec_path,new_args.into_iter());
-                } else {
-                    warn!("loader specified as {} but failed to read", &loader_path);
-                }
-            } else {
-                warn!("loader specified as {} but not found", &loader_path);
-            }
+            let inode = crate::fs::ROOT_INODE
+                .lookup_follow(loader_path, FOLLOW_MAX_DEPTH)
+                .map_err(|_| "interpreter not found")?;
+            // modify args for loader
+            args[0] = exec_path.into();
+            args.insert(0, loader_path.into());
+            // Elf loader should not have INTERP
+            // No infinite loop
+            return Thread::new_user_vm(&inode, exec_path, args, envs);
         }
 
         // Make page table
-        let mut vm = elf.make_memory_set();
+        let mut vm = elf.make_memory_set(inode);
 
         // User stack
         use crate::consts::{USER_STACK_OFFSET, USER_STACK_SIZE};
@@ -204,6 +193,14 @@ impl Thread {
             let ustack_top = USER_STACK_OFFSET + USER_STACK_SIZE;
             vm.push(
                 ustack_buttom,
+                ustack_top - PAGE_SIZE * 4,
+                MemoryAttr::default().user(),
+                Delay::new(GlobalFrameAlloc),
+                "user_stack_delay",
+            );
+            // We are going to write init info now. So map the last 4 pages eagerly.
+            vm.push(
+                ustack_top - PAGE_SIZE * 4,
                 ustack_top,
                 MemoryAttr::default().user(),
                 ByFrame::new(GlobalFrameAlloc),
@@ -214,8 +211,8 @@ impl Thread {
 
         // Make init info
         let init_info = ProcInitInfo {
-            args: args.map(|s| String::from(s)).collect(),
-            envs: BTreeMap::new(),
+            args,
+            envs,
             auxv: {
                 let mut map = BTreeMap::new();
                 if let Some(phdr_vaddr) = elf.get_phdr_vaddr() {
@@ -233,6 +230,19 @@ impl Thread {
 
         trace!("{:#x?}", vm);
 
+        let entry_addr = elf.header.pt2.entry_point() as usize;
+        Ok((vm, entry_addr, ustack_top))
+    }
+
+    /// Make a new user process from ELF `data`
+    pub fn new_user(
+        inode: &Arc<INode>,
+        exec_path: &str,
+        mut args: Vec<String>,
+        envs: Vec<String>,
+    ) -> Box<Thread> {
+        let (vm, entry_addr, ustack_top) = Self::new_user_vm(inode, exec_path, args, envs).unwrap();
+
         let kstack = KernelStack::new();
 
         let mut files = BTreeMap::new();
@@ -270,66 +280,57 @@ impl Thread {
             )),
         );
 
-        let entry_addr = elf.header.pt2.entry_point() as usize;
-
         Box::new(Thread {
             context: unsafe {
                 Context::new_user_thread(entry_addr, ustack_top, kstack.top(), vm.token())
             },
             kstack,
             clear_child_tid: 0,
-            proc: Arc::new(Mutex::new(Process {
+            proc: Process {
                 vm,
                 files,
                 cwd: String::from("/"),
+                exec_path: String::from(exec_path),
                 futexes: BTreeMap::default(),
-                pid: Pid::uninitialized(),
+                pid: Pid(0),
                 parent: None,
                 children: Vec::new(),
                 threads: Vec::new(),
                 child_exit: Arc::new(Condvar::new()),
                 child_exit_code: BTreeMap::new(),
-            })),
+            }
+            .add_to_table(),
         })
     }
 
     /// Fork a new process from current one
     pub fn fork(&self, tf: &TrapFrame) -> Box<Thread> {
-        // Clone memory set, make a new page table
-        let proc = self.proc.lock();
+        let mut proc = self.proc.lock();
+        let kstack = KernelStack::new();
         let vm = proc.vm.clone();
-        let files = proc.files.clone();
-        let cwd = proc.cwd.clone();
-        drop(proc);
-        let parent = Some(self.proc.clone());
-        debug!("fork: finish clone MemorySet");
-
-        // MMU:   copy data to the new space
-        // NoMMU: coping data has been done in `vm.clone()`
-        for area in vm.iter() {
-            let data = Vec::<u8>::from(unsafe { area.as_slice() });
-            unsafe { vm.with(|| area.as_slice_mut().copy_from_slice(data.as_slice())) }
+        let context = unsafe { Context::new_fork(tf, kstack.top(), vm.token()) };
+        let new_proc = Process {
+            vm,
+            files: proc.files.clone(),
+            cwd: proc.cwd.clone(),
+            exec_path: proc.exec_path.clone(),
+            futexes: BTreeMap::default(),
+            pid: Pid(0),
+            parent: Some(self.proc.clone()),
+            children: Vec::new(),
+            threads: Vec::new(),
+            child_exit: Arc::new(Condvar::new()),
+            child_exit_code: BTreeMap::new(),
         }
-
-        debug!("fork: temporary copy data!");
-        let kstack = KernelStack::new();
+        .add_to_table();
+        // link to parent
+        proc.children.push(Arc::downgrade(&new_proc));
 
         Box::new(Thread {
-            context: unsafe { Context::new_fork(tf, kstack.top(), vm.token()) },
+            context,
             kstack,
             clear_child_tid: 0,
-            proc: Arc::new(Mutex::new(Process {
-                vm,
-                files,
-                cwd,
-                futexes: BTreeMap::default(),
-                pid: Pid::uninitialized(),
-                parent,
-                children: Vec::new(),
-                threads: Vec::new(),
-                child_exit: Arc::new(Condvar::new()),
-                child_exit_code: BTreeMap::new(),
-            })),
+            proc: new_proc,
         })
     }
 
@@ -353,22 +354,40 @@ impl Thread {
 }
 
 impl Process {
-    pub fn get_free_fd(&self) -> usize {
+    /// Assign a pid and put itself to global process table.
+    fn add_to_table(mut self) -> Arc<Mutex<Self>> {
+        let mut process_table = PROCESSES.write();
+
+        // assign pid
+        let pid = (0..)
+            .find(|i| match process_table.get(i) {
+                Some(p) if p.upgrade().is_some() => false,
+                _ => true,
+            })
+            .unwrap();
+        self.pid = Pid(pid);
+
+        // put to process table
+        let self_ref = Arc::new(Mutex::new(self));
+        process_table.insert(pid, Arc::downgrade(&self_ref));
+
+        self_ref
+    }
+    fn get_free_fd(&self) -> usize {
         (0..).find(|i| !self.files.contains_key(i)).unwrap()
     }
+    /// Add a file to the process, return its fd.
+    pub fn add_file(&mut self, file_like: FileLike) -> usize {
+        let fd = self.get_free_fd();
+        self.files.insert(fd, file_like);
+        fd
+    }
     pub fn get_futex(&mut self, uaddr: usize) -> Arc<Condvar> {
         if !self.futexes.contains_key(&uaddr) {
             self.futexes.insert(uaddr, Arc::new(Condvar::new()));
         }
         self.futexes.get(&uaddr).unwrap().clone()
     }
-    pub fn clone_for_exec(&mut self, other: &Self) {
-        self.files = other.files.clone();
-        self.cwd = other.cwd.clone();
-        self.pid = other.pid.clone();
-        self.parent = other.parent.clone();
-        self.threads = other.threads.clone();
-    }
 }
 
 trait ToMemoryAttr {
@@ -378,10 +397,12 @@ trait ToMemoryAttr {
 impl ToMemoryAttr for Flags {
     fn to_attr(&self) -> MemoryAttr {
         let mut flags = MemoryAttr::default().user();
-        // FIXME: handle readonly
         if self.is_execute() {
             flags = flags.execute();
         }
+        if !self.is_write() {
+            flags = flags.readonly();
+        }
         flags
     }
 }
@@ -389,7 +410,7 @@ impl ToMemoryAttr for Flags {
 /// Helper functions to process ELF file
 trait ElfExt {
     /// Generate a MemorySet according to the ELF file.
-    fn make_memory_set(&self) -> MemorySet;
+    fn make_memory_set(&self, inode: &Arc<INode>) -> MemorySet;
 
     /// Get interpreter string if it has.
     fn get_interpreter(&self) -> Result<&str, &str>;
@@ -399,7 +420,7 @@ trait ElfExt {
 }
 
 impl ElfExt for ElfFile<'_> {
-    fn make_memory_set(&self) -> MemorySet {
+    fn make_memory_set(&self, inode: &Arc<INode>) -> MemorySet {
         debug!("creating MemorySet from ELF");
         let mut ms = MemorySet::new();
 
@@ -407,33 +428,19 @@ impl ElfExt for ElfFile<'_> {
             if ph.get_type() != Ok(Type::Load) {
                 continue;
             }
-            let virt_addr = ph.virtual_addr() as usize;
-            let mem_size = ph.mem_size() as usize;
-            let data = match ph.get_data(self).unwrap() {
-                SegmentData::Undefined(data) => data,
-                _ => unreachable!(),
-            };
-
-            // Get target slice
-            let target = {
-                ms.push(
-                    virt_addr,
-                    virt_addr + mem_size,
-                    ph.flags().to_attr(),
-                    ByFrame::new(GlobalFrameAlloc),
-                    "",
-                );
-                unsafe { ::core::slice::from_raw_parts_mut(virt_addr as *mut u8, mem_size) }
-            };
-            // Copy data
-            unsafe {
-                ms.with(|| {
-                    if data.len() != 0 {
-                        target[..data.len()].copy_from_slice(data);
-                    }
-                    target[data.len()..].iter_mut().for_each(|x| *x = 0);
-                });
-            }
+            ms.push(
+                ph.virtual_addr() as usize,
+                ph.virtual_addr() as usize + ph.mem_size() as usize,
+                ph.flags().to_attr(),
+                File {
+                    file: INodeForMap(inode.clone()),
+                    mem_start: ph.virtual_addr() as usize,
+                    file_start: ph.offset() as usize,
+                    file_end: ph.offset() as usize + ph.file_size() as usize,
+                    allocator: GlobalFrameAlloc,
+                },
+                "elf",
+            );
         }
         ms
     }
@@ -475,3 +482,12 @@ impl ElfExt for ElfFile<'_> {
         }
     }
 }
+
+#[derive(Clone)]
+pub struct INodeForMap(pub Arc<INode>);
+
+impl Read for INodeForMap {
+    fn read_at(&self, offset: usize, buf: &mut [u8]) -> usize {
+        self.0.read_at(offset, buf).unwrap()
+    }
+}
diff --git a/kernel/src/shell.rs b/kernel/src/shell.rs
index 9b2690e..84c4367 100644
--- a/kernel/src/shell.rs
+++ b/kernel/src/shell.rs
@@ -7,25 +7,46 @@ use alloc::string::String;
 use alloc::vec::Vec;
 
 #[cfg(not(feature = "run_cmdline"))]
-pub fn run_user_shell() {
-    if let Ok(inode) = ROOT_INODE.lookup("rust/sh") {
-        let data = inode.read_as_vec().unwrap();
+pub fn add_user_shell() {
+    // the busybox of alpine linux can not transfer env vars into child process
+    // Now we use busybox from
+    // https://raw.githubusercontent.com/docker-library/busybox/82bc0333a9ae148fbb4246bcbff1487b3fc0c510/musl/busybox.tar.xz -O busybox.tar.xz
+    // This one can transfer env vars!
+    // Why???
+
+    //    #[cfg(target_arch = "x86_64")]
+    //        let init_shell="/bin/busybox"; // from alpine linux
+    //
+    //    #[cfg(not(target_arch = "x86_64"))]
+    let init_shell = "/busybox"; //from docker-library
+
+    #[cfg(target_arch = "x86_64")]
+    let init_envs =
+        vec!["PATH=/usr/sbin:/usr/bin:/sbin:/bin:/usr/x86_64-alpine-linux-musl/bin".into()];
+
+    #[cfg(not(target_arch = "x86_64"))]
+    let init_envs = Vec::new();
+
+    let init_args = vec!["busybox".into(), "ash".into()];
+
+    if let Ok(inode) = ROOT_INODE.lookup(init_shell) {
         processor()
             .manager()
-            .add(Thread::new_user(data.as_slice(), "rust/sh", "sh".split(' ')));
+            .add(Thread::new_user(&inode, init_shell, init_args, init_envs));
     } else {
         processor().manager().add(Thread::new_kernel(shell, 0));
     }
 }
 
 #[cfg(feature = "run_cmdline")]
-pub fn run_user_shell() {
+pub fn add_user_shell() {
     let cmdline = CMDLINE.read();
     let inode = ROOT_INODE.lookup(&cmdline).unwrap();
-    let data = inode.read_as_vec().unwrap();
-    processor()
-        .manager()
-        .add(Thread::new_user(data.as_slice(), cmdline.split(' ')));
+    processor().manager().add(Thread::new_user(
+        &inode,
+        cmdline.split(' ').map(|s| s.into()).collect(),
+        Vec::new(),
+    ));
 }
 
 pub extern "C" fn shell(_arg: usize) -> ! {
@@ -40,13 +61,14 @@ pub extern "C" fn shell(_arg: usize) -> ! {
             continue;
         }
         let name = cmd.trim().split(' ').next().unwrap();
-        if let Ok(file) = ROOT_INODE.lookup(name) {
-            let data = file.read_as_vec().unwrap();
-            let _pid = processor()
-                .manager()
-                .add(Thread::new_user(data.as_slice(), &cmd, cmd.split(' ')));
+        if let Ok(inode) = ROOT_INODE.lookup(name) {
+            let _tid = processor().manager().add(Thread::new_user(
+                &inode,
+                &cmd,
+                cmd.split(' ').map(|s| s.into()).collect(),
+                Vec::new(),
+            ));
         // TODO: wait until process exits, or use user land shell completely
-        //unsafe { thread::JoinHandle::<()>::_of(pid) }.join().unwrap();
         } else {
             println!("Program not exist");
         }
diff --git a/kernel/src/syscall/custom.rs b/kernel/src/syscall/custom.rs
index e21fa12..d774b91 100644
--- a/kernel/src/syscall/custom.rs
+++ b/kernel/src/syscall/custom.rs
@@ -43,10 +43,8 @@ pub fn sys_map_pci_device(vendor: usize, product: usize) -> SysResult {
 /// mapped to a list of virtual addresses.
 pub fn sys_get_paddr(vaddrs: *const u64, paddrs: *mut u64, count: usize) -> SysResult {
     let mut proc = process();
-    proc.vm.check_read_array(vaddrs, count)?;
-    proc.vm.check_write_array(paddrs, count)?;
-    let vaddrs = unsafe { slice::from_raw_parts(vaddrs, count) };
-    let paddrs = unsafe { slice::from_raw_parts_mut(paddrs, count) };
+    let vaddrs = unsafe { proc.vm.check_read_array(vaddrs, count)? };
+    let paddrs = unsafe { proc.vm.check_write_array(paddrs, count)? };
     for i in 0..count {
         let paddr = proc.vm.translate(vaddrs[i] as usize).unwrap_or(0);
         paddrs[i] = paddr as u64;
diff --git a/kernel/src/syscall/fs.rs b/kernel/src/syscall/fs.rs
index 4ad87e7..efa0852 100644
--- a/kernel/src/syscall/fs.rs
+++ b/kernel/src/syscall/fs.rs
@@ -3,6 +3,7 @@
 use core::cell::UnsafeCell;
 use core::cmp::min;
 use core::mem::size_of;
+#[cfg(not(target_arch = "mips"))]
 use rcore_fs::vfs::Timespec;
 
 use crate::drivers::SOCKET_ACTIVITY;
@@ -20,8 +21,7 @@ pub fn sys_read(fd: usize, base: *mut u8, len: usize) -> SysResult {
         // we trust pid 0 process
         info!("read: fd: {}, base: {:?}, len: {:#x}", fd, base, len);
     }
-    proc.vm.check_write_array(base, len)?;
-    let slice = unsafe { slice::from_raw_parts_mut(base, len) };
+    let slice = unsafe { proc.vm.check_write_array(base, len)? };
     let file_like = proc.get_file_like(fd)?;
     let len = file_like.read(slice)?;
     Ok(len)
@@ -33,8 +33,7 @@ pub fn sys_write(fd: usize, base: *const u8, len: usize) -> SysResult {
         // we trust pid 0 process
         info!("write: fd: {}, base: {:?}, len: {:#x}", fd, base, len);
     }
-    proc.vm.check_read_array(base, len)?;
-    let slice = unsafe { slice::from_raw_parts(base, len) };
+    let slice = unsafe { proc.vm.check_read_array(base, len)? };
     let file_like = proc.get_file_like(fd)?;
     let len = file_like.write(slice)?;
     Ok(len)
@@ -46,9 +45,7 @@ pub fn sys_pread(fd: usize, base: *mut u8, len: usize, offset: usize) -> SysResu
         fd, base, len, offset
     );
     let mut proc = process();
-    proc.vm.check_write_array(base, len)?;
-
-    let slice = unsafe { slice::from_raw_parts_mut(base, len) };
+    let slice = unsafe { proc.vm.check_write_array(base, len)? };
     let len = proc.get_file(fd)?.read_at(offset, slice)?;
     Ok(len)
 }
@@ -59,9 +56,7 @@ pub fn sys_pwrite(fd: usize, base: *const u8, len: usize, offset: usize) -> SysR
         fd, base, len, offset
     );
     let mut proc = process();
-    proc.vm.check_read_array(base, len)?;
-
-    let slice = unsafe { slice::from_raw_parts(base, len) };
+    let slice = unsafe { proc.vm.check_read_array(base, len)? };
     let len = proc.get_file(fd)?.write_at(offset, slice)?;
     Ok(len)
 }
@@ -71,8 +66,8 @@ pub fn sys_ppoll(ufds: *mut PollFd, nfds: usize, timeout: *const TimeSpec) -> Sy
     let timeout_msecs = if timeout.is_null() {
         1 << 31 // infinity
     } else {
-        proc.vm.check_read_ptr(timeout)?;
-        unsafe { (*timeout).to_msec() }
+        let timeout = unsafe { proc.vm.check_read_ptr(timeout)? };
+        timeout.to_msec()
     };
     drop(proc);
 
@@ -80,14 +75,16 @@ pub fn sys_ppoll(ufds: *mut PollFd, nfds: usize, timeout: *const TimeSpec) -> Sy
 }
 
 pub fn sys_poll(ufds: *mut PollFd, nfds: usize, timeout_msecs: usize) -> SysResult {
-    info!(
-        "poll: ufds: {:?}, nfds: {}, timeout_msecs: {:#x}",
-        ufds, nfds, timeout_msecs
-    );
     let proc = process();
-    proc.vm.check_write_array(ufds, nfds)?;
+    if !proc.pid.is_init() {
+        // we trust pid 0 process
+        info!(
+            "poll: ufds: {:?}, nfds: {}, timeout_msecs: {:#x}",
+            ufds, nfds, timeout_msecs
+        );
+    }
 
-    let polls = unsafe { slice::from_raw_parts_mut(ufds, nfds) };
+    let polls = unsafe { proc.vm.check_write_array(ufds, nfds)? };
     for poll in polls.iter() {
         if proc.files.get(&(poll.fd as usize)).is_none() {
             return Err(SysError::EINVAL);
@@ -152,9 +149,9 @@ pub fn sys_select(
     let mut read_fds = FdSet::new(&proc.vm, read, nfds)?;
     let mut write_fds = FdSet::new(&proc.vm, write, nfds)?;
     let mut err_fds = FdSet::new(&proc.vm, err, nfds)?;
-    let timeout_msecs = if timeout as usize != 0 {
-        proc.vm.check_read_ptr(timeout)?;
-        unsafe { *timeout }.to_msec()
+    let timeout_msecs = if !timeout.is_null() {
+        let timeout = unsafe { proc.vm.check_read_ptr(timeout)? };
+        timeout.to_msec()
     } else {
         // infinity
         1 << 31
@@ -169,6 +166,9 @@ pub fn sys_select(
             if fd >= nfds {
                 continue;
             }
+            if !err_fds.contains(fd) && !read_fds.contains(fd) && !write_fds.contains(fd) {
+                continue;
+            }
             let status = file_like.poll()?;
             if status.error && err_fds.contains(fd) {
                 err_fds.set(fd);
@@ -210,7 +210,7 @@ pub fn sys_readv(fd: usize, iov_ptr: *const IoVec, iov_count: usize) -> SysResul
         fd, iov_ptr, iov_count
     );
     let mut proc = process();
-    let mut iovs = IoVecs::check_and_new(iov_ptr, iov_count, &proc.vm, true)?;
+    let mut iovs = unsafe { IoVecs::check_and_new(iov_ptr, iov_count, &proc.vm, true)? };
 
     // read all data to a buf
     let file_like = proc.get_file_like(fd)?;
@@ -222,12 +222,15 @@ pub fn sys_readv(fd: usize, iov_ptr: *const IoVec, iov_count: usize) -> SysResul
 }
 
 pub fn sys_writev(fd: usize, iov_ptr: *const IoVec, iov_count: usize) -> SysResult {
-    info!(
-        "writev: fd: {}, iov: {:?}, count: {}",
-        fd, iov_ptr, iov_count
-    );
     let mut proc = process();
-    let iovs = IoVecs::check_and_new(iov_ptr, iov_count, &proc.vm, false)?;
+    if !proc.pid.is_init() {
+        // we trust pid 0 process
+        info!(
+            "writev: fd: {}, iov: {:?}, count: {}",
+            fd, iov_ptr, iov_count
+        );
+    }
+    let iovs = unsafe { IoVecs::check_and_new(iov_ptr, iov_count, &proc.vm, false)? };
 
     let buf = iovs.read_all_to_vec();
     let len = buf.len();
@@ -253,7 +256,7 @@ pub fn sys_openat(dir_fd: usize, path: *const u8, flags: usize, mode: usize) ->
     let inode = if flags.contains(OpenFlags::CREATE) {
         let (dir_path, file_name) = split_path(&path);
         // relative to cwd
-        let dir_inode = proc.lookup_inode_at(dir_fd, dir_path)?;
+        let dir_inode = proc.lookup_inode_at(dir_fd, dir_path, true)?;
         match dir_inode.find(file_name) {
             Ok(file_inode) => {
                 if flags.contains(OpenFlags::EXCLUSIVE) {
@@ -267,13 +270,11 @@ pub fn sys_openat(dir_fd: usize, path: *const u8, flags: usize, mode: usize) ->
             Err(e) => return Err(SysError::from(e)),
         }
     } else {
-        proc.lookup_inode_at(dir_fd, &path)?
+        proc.lookup_inode_at(dir_fd, &path, true)?
     };
 
-    let fd = proc.get_free_fd();
-
     let file = FileHandle::new(inode, flags.to_options());
-    proc.files.insert(fd, FileLike::File(file));
+    let fd = proc.add_file(FileLike::File(file));
     Ok(fd)
 }
 
@@ -297,10 +298,10 @@ pub fn sys_faccessat(dirfd: usize, path: *const u8, mode: usize, flags: usize) -
         // we trust pid 0 process
         info!(
             "faccessat: dirfd: {}, path: {:?}, mode: {:#o}, flags: {:?}",
-            dirfd, path, mode, flags
+            dirfd as isize, path, mode, flags
         );
     }
-    let inode = proc.lookup_inode_at(dirfd, &path)?;
+    let inode = proc.lookup_inode_at(dirfd, &path, !flags.contains(AtFlags::SYMLINK_NOFOLLOW))?;
     Ok(0)
 }
 
@@ -310,46 +311,41 @@ pub fn sys_getcwd(buf: *mut u8, len: usize) -> SysResult {
         // we trust pid 0 process
         info!("getcwd: buf: {:?}, len: {:#x}", buf, len);
     }
-    proc.vm.check_write_array(buf, len)?;
+    let buf = unsafe { proc.vm.check_write_array(buf, len)? };
     if proc.cwd.len() + 1 > len {
         return Err(SysError::ERANGE);
     }
-    unsafe { util::write_cstr(buf, &proc.cwd) }
-    Ok(buf as usize)
+    unsafe { util::write_cstr(buf.as_mut_ptr(), &proc.cwd) }
+    Ok(buf.as_ptr() as usize)
 }
 
 pub fn sys_lstat(path: *const u8, stat_ptr: *mut Stat) -> SysResult {
-    warn!("lstat is partial implemented as stat");
-    sys_stat(path, stat_ptr)
+    sys_fstatat(AT_FDCWD, path, stat_ptr, AtFlags::SYMLINK_NOFOLLOW.bits())
 }
 
 pub fn sys_fstat(fd: usize, stat_ptr: *mut Stat) -> SysResult {
     info!("fstat: fd: {}, stat_ptr: {:?}", fd, stat_ptr);
     let mut proc = process();
-    proc.vm.check_write_ptr(stat_ptr)?;
+    let stat_ref = unsafe { proc.vm.check_write_ptr(stat_ptr)? };
     let file = proc.get_file(fd)?;
     let stat = Stat::from(file.metadata()?);
-    unsafe {
-        stat_ptr.write(stat);
-    }
+    *stat_ref = stat;
     Ok(0)
 }
 
 pub fn sys_fstatat(dirfd: usize, path: *const u8, stat_ptr: *mut Stat, flags: usize) -> SysResult {
     let proc = process();
     let path = unsafe { proc.vm.check_and_clone_cstr(path)? };
-    proc.vm.check_write_ptr(stat_ptr)?;
+    let stat_ref = unsafe { proc.vm.check_write_ptr(stat_ptr)? };
     let flags = AtFlags::from_bits_truncate(flags);
     info!(
         "fstatat: dirfd: {}, path: {:?}, stat_ptr: {:?}, flags: {:?}",
-        dirfd, path, stat_ptr, flags
+        dirfd as isize, path, stat_ptr, flags
     );
 
-    let inode = proc.lookup_inode_at(dirfd, &path)?;
+    let inode = proc.lookup_inode_at(dirfd, &path, !flags.contains(AtFlags::SYMLINK_NOFOLLOW))?;
     let stat = Stat::from(inode.metadata()?);
-    unsafe {
-        stat_ptr.write(stat);
-    }
+    *stat_ref = stat;
     Ok(0)
 }
 
@@ -364,14 +360,16 @@ pub fn sys_readlink(path: *const u8, base: *mut u8, len: usize) -> SysResult {
 pub fn sys_readlinkat(dirfd: usize, path: *const u8, base: *mut u8, len: usize) -> SysResult {
     let proc = process();
     let path = unsafe { proc.vm.check_and_clone_cstr(path)? };
-    proc.vm.check_write_array(base, len)?;
-    info!("readlink: path: {:?}, base: {:?}, len: {}", path, base, len);
+    let slice = unsafe { proc.vm.check_write_array(base, len)? };
+    info!(
+        "readlinkat: dirfd: {}, path: {:?}, base: {:?}, len: {}",
+        dirfd as isize, path, base, len
+    );
 
-    let inode = proc.lookup_inode_at(dirfd, &path)?;
+    let inode = proc.lookup_inode_at(dirfd, &path, false)?;
     if inode.metadata()?.type_ == FileType::SymLink {
         // TODO: recursive link resolution and loop detection
-        let mut slice = unsafe { slice::from_raw_parts_mut(base, len) };
-        let len = inode.read_at(0, &mut slice)?;
+        let len = inode.read_at(0, slice)?;
         Ok(len)
     } else {
         Err(SysError::EINVAL)
@@ -425,13 +423,13 @@ pub fn sys_getdents64(fd: usize, buf: *mut LinuxDirent64, buf_size: usize) -> Sy
         fd, buf, buf_size
     );
     let mut proc = process();
-    proc.vm.check_write_array(buf as *mut u8, buf_size)?;
+    let buf = unsafe { proc.vm.check_write_array(buf as *mut u8, buf_size)? };
     let file = proc.get_file(fd)?;
     let info = file.metadata()?;
     if info.type_ != FileType::Dir {
         return Err(SysError::ENOTDIR);
     }
-    let mut writer = unsafe { DirentBufWriter::new(buf, buf_size) };
+    let mut writer = DirentBufWriter::new(buf);
     loop {
         let name = match file.read_entry() {
             Err(FsError::EntryNotFound) => break,
@@ -459,7 +457,7 @@ pub fn sys_dup2(fd1: usize, fd2: usize) -> SysResult {
 
 pub fn sys_ioctl(fd: usize, request: usize, arg1: usize, arg2: usize, arg3: usize) -> SysResult {
     info!(
-        "ioctl: fd: {}, request: {}, args: {} {} {}",
+        "ioctl: fd: {}, request: {:x}, args: {} {} {}",
         fd, request, arg1, arg2, arg3
     );
     let mut proc = process();
@@ -525,13 +523,13 @@ pub fn sys_renameat(
     let newpath = unsafe { proc.vm.check_and_clone_cstr(newpath)? };
     info!(
         "renameat: olddirfd: {}, oldpath: {:?}, newdirfd: {}, newpath: {:?}",
-        olddirfd, oldpath, newdirfd, newpath
+        olddirfd as isize, oldpath, newdirfd as isize, newpath
     );
 
     let (old_dir_path, old_file_name) = split_path(&oldpath);
     let (new_dir_path, new_file_name) = split_path(&newpath);
-    let old_dir_inode = proc.lookup_inode_at(olddirfd, old_dir_path)?;
-    let new_dir_inode = proc.lookup_inode_at(newdirfd, new_dir_path)?;
+    let old_dir_inode = proc.lookup_inode_at(olddirfd, old_dir_path, false)?;
+    let new_dir_inode = proc.lookup_inode_at(newdirfd, new_dir_path, false)?;
     old_dir_inode.move_(old_file_name, &new_dir_inode, new_file_name)?;
     Ok(0)
 }
@@ -546,11 +544,11 @@ pub fn sys_mkdirat(dirfd: usize, path: *const u8, mode: usize) -> SysResult {
     // TODO: check pathname
     info!(
         "mkdirat: dirfd: {}, path: {:?}, mode: {:#o}",
-        dirfd, path, mode
+        dirfd as isize, path, mode
     );
 
     let (dir_path, file_name) = split_path(&path);
-    let inode = proc.lookup_inode_at(dirfd, dir_path)?;
+    let inode = proc.lookup_inode_at(dirfd, dir_path, true)?;
     if inode.find(file_name).is_ok() {
         return Err(SysError::EEXIST);
     }
@@ -590,12 +588,12 @@ pub fn sys_linkat(
     let flags = AtFlags::from_bits_truncate(flags);
     info!(
         "linkat: olddirfd: {}, oldpath: {:?}, newdirfd: {}, newpath: {:?}, flags: {:?}",
-        olddirfd, oldpath, newdirfd, newpath, flags
+        olddirfd as isize, oldpath, newdirfd as isize, newpath, flags
     );
 
     let (new_dir_path, new_file_name) = split_path(&newpath);
-    let inode = proc.lookup_inode_at(olddirfd, &oldpath)?;
-    let new_dir_inode = proc.lookup_inode_at(newdirfd, new_dir_path)?;
+    let inode = proc.lookup_inode_at(olddirfd, &oldpath, true)?;
+    let new_dir_inode = proc.lookup_inode_at(newdirfd, new_dir_path, true)?;
     new_dir_inode.link(new_file_name, &inode)?;
     Ok(0)
 }
@@ -610,11 +608,11 @@ pub fn sys_unlinkat(dirfd: usize, path: *const u8, flags: usize) -> SysResult {
     let flags = AtFlags::from_bits_truncate(flags);
     info!(
         "unlinkat: dirfd: {}, path: {:?}, flags: {:?}",
-        dirfd, path, flags
+        dirfd as isize, path, flags
     );
 
     let (dir_path, file_name) = split_path(&path);
-    let dir_inode = proc.lookup_inode_at(dirfd, dir_path)?;
+    let dir_inode = proc.lookup_inode_at(dirfd, dir_path, true)?;
     let file_inode = dir_inode.find(file_name)?;
     if file_inode.metadata()?.type_ == FileType::Dir {
         return Err(SysError::EISDIR);
@@ -627,39 +625,29 @@ pub fn sys_pipe(fds: *mut u32) -> SysResult {
     info!("pipe: fds: {:?}", fds);
 
     let mut proc = process();
-    proc.vm.check_write_array(fds, 2)?;
+    let fds = unsafe { proc.vm.check_write_array(fds, 2)? };
     let (read, write) = Pipe::create_pair();
 
-    let read_fd = proc.get_free_fd();
-    proc.files.insert(
-        read_fd,
-        FileLike::File(FileHandle::new(
-            Arc::new(read),
-            OpenOptions {
-                read: true,
-                write: false,
-                append: false,
-            },
-        )),
-    );
-
-    let write_fd = proc.get_free_fd();
-    proc.files.insert(
-        write_fd,
-        FileLike::File(FileHandle::new(
-            Arc::new(write),
-            OpenOptions {
-                read: false,
-                write: true,
-                append: false,
-            },
-        )),
-    );
+    let read_fd = proc.add_file(FileLike::File(FileHandle::new(
+        Arc::new(read),
+        OpenOptions {
+            read: true,
+            write: false,
+            append: false,
+        },
+    )));
+
+    let write_fd = proc.add_file(FileLike::File(FileHandle::new(
+        Arc::new(write),
+        OpenOptions {
+            read: false,
+            write: true,
+            append: false,
+        },
+    )));
 
-    unsafe {
-        *fds = read_fd as u32;
-        *(fds.add(1)) = write_fd as u32;
-    }
+    fds[0] = read_fd as u32;
+    fds[1] = write_fd as u32;
 
     info!("pipe: created rfd: {} wfd: {}", read_fd, write_fd);
 
@@ -671,69 +659,70 @@ pub fn sys_sync() -> SysResult {
     Ok(0)
 }
 
-pub fn sys_sendfile(out_fd: usize, in_fd: usize, offset: *mut usize, count: usize) -> SysResult {
+pub fn sys_sendfile(
+    out_fd: usize,
+    in_fd: usize,
+    offset_ptr: *mut usize,
+    count: usize,
+) -> SysResult {
     info!(
-        "sendfile: out: {}, in: {}, offset: {:?}, count: {}",
-        out_fd, in_fd, offset, count
+        "sendfile:BEG out: {}, in: {}, offset_ptr: {:?}, count: {}",
+        out_fd, in_fd, offset_ptr, count
     );
     let proc = process();
     // We know it's save, pacify the borrow checker
     let proc_cell = UnsafeCell::new(proc);
-    let proc_in = unsafe { &mut *proc_cell.get() };
-    let proc_out = unsafe { &mut *proc_cell.get() };
-    //let in_file: &mut FileHandle = unsafe { &mut *UnsafeCell::new(proc.get_file(in_fd)?).get() };
-    //let out_file: &mut FileHandle = unsafe { &mut *UnsafeCell::new(proc.get_file(out_fd)?).get() };
-    let in_file = proc_in.get_file(in_fd)?;
-    let out_file = proc_out.get_file(out_fd)?;
+    let in_file = unsafe { (*proc_cell.get()).get_file(in_fd)? };
+    let out_file = unsafe { (*proc_cell.get()).get_file(out_fd)? };
     let mut buffer = [0u8; 1024];
-    if offset.is_null() {
-        // read from current file offset
-        let mut bytes_read = 0;
-        while bytes_read < count {
-            let len = min(buffer.len(), count - bytes_read);
-            let read_len = in_file.read(&mut buffer[..len])?;
-            if read_len == 0 {
-                break;
-            }
-            bytes_read += read_len;
-            let mut bytes_written = 0;
-            while bytes_written < read_len {
-                let write_len = out_file.write(&buffer[bytes_written..])?;
-                if write_len == 0 {
-                    return Err(SysError::EBADF);
-                }
-                bytes_written += write_len;
-            }
-        }
-        return Ok(bytes_read);
+
+    let mut read_offset = if !offset_ptr.is_null() {
+        unsafe { *(*proc_cell.get()).vm.check_read_ptr(offset_ptr)? }
     } else {
-        let proc_mem = unsafe { &mut *proc_cell.get() };
-        proc_mem.vm.check_read_ptr(offset)?;
-        let mut read_offset = unsafe { *offset };
-        // read from specified offset and write new offset back
-        let mut bytes_read = 0;
-        while bytes_read < count {
-            let len = min(buffer.len(), count - bytes_read);
-            let read_len = in_file.read_at(read_offset, &mut buffer[..len])?;
-            if read_len == 0 {
-                break;
-            }
-            bytes_read += read_len;
-            read_offset += read_len;
-            let mut bytes_written = 0;
-            while bytes_written < read_len {
-                let write_len = out_file.write(&buffer[bytes_written..])?;
-                if write_len == 0 {
-                    return Err(SysError::EBADF);
-                }
-                bytes_written += write_len;
+        in_file.seek(SeekFrom::Current(0))? as usize
+    };
+
+    // read from specified offset and write new offset back
+    let mut bytes_read = 0;
+    let mut total_written = 0;
+    while bytes_read < count {
+        let len = min(buffer.len(), count - bytes_read);
+        let read_len = in_file.read_at(read_offset, &mut buffer[..len])?;
+        if read_len == 0 {
+            break;
+        }
+        bytes_read += read_len;
+        read_offset += read_len;
+
+        let mut bytes_written = 0;
+        let mut rlen = read_len;
+        while bytes_written < read_len {
+            let write_len = out_file.write(&buffer[bytes_written..(bytes_written + rlen)])?;
+            if write_len == 0 {
+                info!(
+                    "sendfile:END_ERR out: {}, in: {}, offset_ptr: {:?}, count: {} = bytes_read {}, bytes_written {}, write_len {}",
+                    out_fd, in_fd, offset_ptr, count, bytes_read, bytes_written, write_len
+                );
+                return Err(SysError::EBADF);
             }
+            bytes_written += write_len;
+            rlen -= write_len;
         }
+        total_written += bytes_written;
+    }
+
+    if !offset_ptr.is_null() {
         unsafe {
-            *offset = read_offset;
+            offset_ptr.write(read_offset);
         }
-        return Ok(bytes_read);
+    } else {
+        in_file.seek(SeekFrom::Current(bytes_read as i64))?;
     }
+    info!(
+        "sendfile:END out: {}, in: {}, offset_ptr: {:?}, count: {} = bytes_read {}, total_written {}",
+        out_fd, in_fd, offset_ptr, count, bytes_read, total_written
+    );
+    return Ok(total_written);
 }
 
 impl Process {
@@ -761,13 +750,20 @@ impl Process {
         &self,
         dirfd: usize,
         path: &str,
-        //        follow: bool,
+        follow: bool,
     ) -> Result<Arc<INode>, SysError> {
-        let follow = true;
         debug!(
-            "lookup_inode_at: fd: {:?}, cwd: {:?}, path: {:?}, follow: {:?}",
-            dirfd, self.cwd, path, follow
+            "lookup_inode_at: dirfd: {:?}, cwd: {:?}, path: {:?}, follow: {:?}",
+            dirfd as isize, self.cwd, path, follow
         );
+        // hard code special path
+        match path {
+            "/proc/self/exe" => {
+                return Ok(Arc::new(Pseudo::new(&self.exec_path, FileType::SymLink)));
+            }
+            _ => {}
+        }
+
         let follow_max_depth = if follow { FOLLOW_MAX_DEPTH } else { 0 };
         if dirfd == AT_FDCWD {
             Ok(ROOT_INODE
@@ -783,7 +779,7 @@ impl Process {
     }
 
     pub fn lookup_inode(&self, path: &str) -> Result<Arc<INode>, SysError> {
-        self.lookup_inode_at(AT_FDCWD, path)
+        self.lookup_inode_at(AT_FDCWD, path, true)
     }
 }
 
@@ -877,18 +873,20 @@ pub struct LinuxDirent64 {
     name: [u8; 0],
 }
 
-struct DirentBufWriter {
+struct DirentBufWriter<'a> {
+    buf: &'a mut [u8],
     ptr: *mut LinuxDirent64,
     rest_size: usize,
     written_size: usize,
 }
 
-impl DirentBufWriter {
-    unsafe fn new(buf: *mut LinuxDirent64, size: usize) -> Self {
+impl<'a> DirentBufWriter<'a> {
+    fn new(buf: &'a mut [u8]) -> Self {
         DirentBufWriter {
-            ptr: buf,
-            rest_size: size,
+            ptr: buf.as_mut_ptr() as *mut LinuxDirent64,
+            rest_size: buf.len(),
             written_size: 0,
+            buf,
         }
     }
     fn try_write(&mut self, inode: u64, type_: u8, name: &str) -> bool {
@@ -988,7 +986,55 @@ pub struct Stat {
     ctime: Timespec,
 }
 
-#[cfg(not(target_arch = "x86_64"))]
+#[cfg(target_arch = "mips")]
+#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
+pub struct Timespec {
+    pub sec: i32,
+    pub nsec: i32,
+}
+
+#[cfg(target_arch = "mips")]
+#[repr(C)]
+#[derive(Debug)]
+pub struct Stat {
+    /// ID of device containing file
+    dev: u64,
+    /// padding
+    __pad1: u64,
+    /// inode number
+    ino: u64,
+    /// file type and mode
+    mode: StatMode,
+    /// number of hard links
+    nlink: u32,
+
+    /// user ID of owner
+    uid: u32,
+    /// group ID of owner
+    gid: u32,
+    /// device ID (if special file)
+    rdev: u64,
+    /// padding
+    __pad2: u64,
+    /// total size, in bytes
+    size: u64,
+
+    /// last access time
+    atime: Timespec,
+    /// last modification time
+    mtime: Timespec,
+    /// last status change time
+    ctime: Timespec,
+
+    /// blocksize for filesystem I/O
+    blksize: u32,
+    /// padding
+    __pad3: u32,
+    /// number of 512B blocks allocated
+    blocks: u64,
+}
+
+#[cfg(not(any(target_arch = "x86_64", target_arch = "mips")))]
 #[repr(C)]
 #[derive(Debug)]
 pub struct Stat {
@@ -1117,7 +1163,38 @@ impl From<Metadata> for Stat {
         }
     }
 
-    #[cfg(not(target_arch = "x86_64"))]
+    #[cfg(target_arch = "mips")]
+    fn from(info: Metadata) -> Self {
+        Stat {
+            dev: info.dev as u64,
+            ino: info.inode as u64,
+            mode: StatMode::from_type_mode(info.type_, info.mode as u16),
+            nlink: info.nlinks as u32,
+            uid: info.uid as u32,
+            gid: info.gid as u32,
+            rdev: 0,
+            size: info.size as u64,
+            blksize: info.blk_size as u32,
+            blocks: info.blocks as u64,
+            atime: Timespec {
+                sec: info.atime.sec as i32,
+                nsec: info.atime.nsec,
+            },
+            mtime: Timespec {
+                sec: info.mtime.sec as i32,
+                nsec: info.mtime.nsec,
+            },
+            ctime: Timespec {
+                sec: info.ctime.sec as i32,
+                nsec: info.ctime.nsec,
+            },
+            __pad1: 0,
+            __pad2: 0,
+            __pad3: 0,
+        }
+    }
+
+    #[cfg(not(any(target_arch = "x86_64", target_arch = "mips")))]
     fn from(info: Metadata) -> Self {
         Stat {
             dev: info.dev as u64,
@@ -1149,7 +1226,7 @@ pub struct IoVec {
     /// Starting address
     base: *mut u8,
     /// Number of bytes to transfer
-    len: u64,
+    len: usize,
 }
 
 /// A valid IoVecs request from user
@@ -1157,28 +1234,28 @@ pub struct IoVec {
 pub struct IoVecs(Vec<&'static mut [u8]>);
 
 impl IoVecs {
-    pub fn check_and_new(
+    pub unsafe fn check_and_new(
         iov_ptr: *const IoVec,
         iov_count: usize,
         vm: &MemorySet,
         readv: bool,
     ) -> Result<Self, SysError> {
-        vm.check_read_array(iov_ptr, iov_count)?;
-        let iovs = unsafe { slice::from_raw_parts(iov_ptr, iov_count) }.to_vec();
+        let iovs = vm.check_read_array(iov_ptr, iov_count)?.to_vec();
         // check all bufs in iov
         for iov in iovs.iter() {
-            if iov.len > 0 {
-                // skip empty iov
-                if readv {
-                    vm.check_write_array(iov.base, iov.len as usize)?;
-                } else {
-                    vm.check_read_array(iov.base, iov.len as usize)?;
-                }
+            // skip empty iov
+            if iov.len == 0 {
+                continue;
+            }
+            if readv {
+                vm.check_write_array(iov.base, iov.len)?;
+            } else {
+                vm.check_read_array(iov.base, iov.len)?;
             }
         }
         let slices = iovs
             .iter()
-            .map(|iov| unsafe { slice::from_raw_parts_mut(iov.base, iov.len as usize) })
+            .map(|iov| slice::from_raw_parts_mut(iov.base, iov.len))
             .collect();
         Ok(IoVecs(slices))
     }
@@ -1260,12 +1337,12 @@ impl FdSet {
             })
         } else {
             let len = (nfds + FD_PER_ITEM - 1) / FD_PER_ITEM;
-            vm.check_write_array(addr, len)?;
             if len > MAX_FDSET_SIZE {
                 return Err(SysError::EINVAL);
             }
-            let slice = unsafe { slice::from_raw_parts_mut(addr, len) };
+            let slice = unsafe { vm.check_write_array(addr, len)? };
             let bitset: &'static mut BitSlice<LittleEndian, u32> = slice.into();
+            debug!("bitset {:?}", bitset);
 
             // save the fdset, and clear it
             use alloc::prelude::ToOwned;
@@ -1289,7 +1366,11 @@ impl FdSet {
     /// Check to see whether `fd` is in original `FdSet`
     /// Fd should be less than nfds
     fn contains(&self, fd: usize) -> bool {
-        self.origin[fd]
+        if fd < self.bitset.len() {
+            self.origin[fd]
+        } else {
+            false
+        }
     }
 }
 
diff --git a/kernel/src/syscall/mem.rs b/kernel/src/syscall/mem.rs
index 1c5bee9..d108a7c 100644
--- a/kernel/src/syscall/mem.rs
+++ b/kernel/src/syscall/mem.rs
@@ -1,4 +1,4 @@
-use rcore_memory::memory_set::handler::{ByFrame, Delay};
+use rcore_memory::memory_set::handler::{ByFrame, Delay, File};
 use rcore_memory::memory_set::MemoryAttr;
 use rcore_memory::paging::PageTable;
 use rcore_memory::Page;
@@ -51,24 +51,20 @@ pub fn sys_mmap(
         );
         return Ok(addr);
     } else {
-        // only check
-        let _ = proc.get_file(fd)?;
-
-        // TODO: delay mmap file
+        let inode = proc.get_file(fd)?.inode();
         proc.vm.push(
             addr,
             addr + len,
             prot.to_attr(),
-            ByFrame::new(GlobalFrameAlloc),
+            File {
+                file: INodeForMap(inode),
+                mem_start: addr,
+                file_start: offset,
+                file_end: offset + len,
+                allocator: GlobalFrameAlloc,
+            },
             "mmap_file",
         );
-        let data = unsafe { slice::from_raw_parts_mut(addr as *mut u8, len) };
-        let file = proc.get_file(fd)?;
-        let read_len = file.read_at(offset, data)?;
-        if read_len != data.len() {
-            // use count() to consume the iterator
-            data[read_len..].iter_mut().map(|x| *x = 0).count();
-        }
         return Ok(addr);
     }
 }
@@ -123,6 +119,21 @@ bitflags! {
     }
 }
 
+#[cfg(target_arch = "mips")]
+bitflags! {
+    pub struct MmapFlags: usize {
+        /// Changes are shared.
+        const SHARED = 1 << 0;
+        /// Changes are private.
+        const PRIVATE = 1 << 1;
+        /// Place the mapping at the exact address
+        const FIXED = 1 << 4;
+        /// The mapping is not backed by any file. (non-POSIX)
+        const ANONYMOUS = 0x800;
+    }
+}
+
+#[cfg(not(target_arch = "mips"))]
 bitflags! {
     pub struct MmapFlags: usize {
         /// Changes are shared.
diff --git a/kernel/src/syscall/misc.rs b/kernel/src/syscall/misc.rs
index ac3ff39..e7f867c 100644
--- a/kernel/src/syscall/misc.rs
+++ b/kernel/src/syscall/misc.rs
@@ -18,16 +18,16 @@ pub fn sys_arch_prctl(code: i32, addr: usize, tf: &mut TrapFrame) -> SysResult {
 }
 
 pub fn sys_uname(buf: *mut u8) -> SysResult {
-    info!("sched_uname: buf: {:?}", buf);
+    info!("uname: buf: {:?}", buf);
 
     let offset = 65;
     let strings = ["rCore", "orz", "0.1.0", "1", "machine", "domain"];
     let proc = process();
-    proc.vm.check_write_array(buf, strings.len() * offset)?;
+    let buf = unsafe { proc.vm.check_write_array(buf, strings.len() * offset)? };
 
     for i in 0..strings.len() {
         unsafe {
-            util::write_cstr(buf.add(i * offset), &strings[i]);
+            util::write_cstr(&mut buf[i * offset], &strings[i]);
         }
     }
     Ok(0)
@@ -39,22 +39,20 @@ pub fn sys_sched_getaffinity(pid: usize, size: usize, mask: *mut u32) -> SysResu
         pid, size, mask
     );
     let proc = process();
-    proc.vm.check_write_array(mask, size / size_of::<u32>())?;
+    let mask = unsafe { proc.vm.check_write_array(mask, size / size_of::<u32>())? };
 
     // we only have 4 cpu at most.
     // so just set it.
-    unsafe {
-        *mask = 0b1111;
-    }
+    mask[0] = 0b1111;
     Ok(0)
 }
 
 pub fn sys_sysinfo(sys_info: *mut SysInfo) -> SysResult {
     let proc = process();
-    proc.vm.check_write_ptr(sys_info)?;
+    let sys_info = unsafe { proc.vm.check_write_ptr(sys_info)? };
 
     let sysinfo = SysInfo::default();
-    unsafe { *sys_info = sysinfo };
+    *sys_info = sysinfo;
     Ok(0)
 }
 
@@ -74,13 +72,11 @@ pub fn sys_futex(uaddr: usize, op: u32, val: i32, timeout: *const TimeSpec) -> S
     if uaddr % size_of::<u32>() != 0 {
         return Err(SysError::EINVAL);
     }
-    process().vm.check_write_ptr(uaddr as *mut AtomicI32)?;
-    let atomic = unsafe { &mut *(uaddr as *mut AtomicI32) };
+    let atomic = unsafe { process().vm.check_write_ptr(uaddr as *mut AtomicI32)? };
     let _timeout = if timeout.is_null() {
         None
     } else {
-        process().vm.check_read_ptr(timeout)?;
-        Some(unsafe { *timeout })
+        Some(unsafe { *process().vm.check_read_ptr(timeout)? })
     };
 
     const OP_WAIT: u32 = 0;
@@ -156,38 +152,32 @@ pub fn sys_prlimit64(
     match resource {
         RLIMIT_STACK => {
             if !old_limit.is_null() {
-                proc.vm.check_write_ptr(old_limit)?;
-                unsafe {
-                    *old_limit = RLimit {
-                        cur: USER_STACK_SIZE as u64,
-                        max: USER_STACK_SIZE as u64,
-                    };
-                }
+                let old_limit = unsafe { proc.vm.check_write_ptr(old_limit)? };
+                *old_limit = RLimit {
+                    cur: USER_STACK_SIZE as u64,
+                    max: USER_STACK_SIZE as u64,
+                };
             }
             Ok(0)
         }
         RLIMIT_NOFILE => {
             if !old_limit.is_null() {
-                proc.vm.check_write_ptr(old_limit)?;
-                unsafe {
-                    *old_limit = RLimit {
-                        cur: 1024,
-                        max: 1024,
-                    };
-                }
+                let old_limit = unsafe { proc.vm.check_write_ptr(old_limit)? };
+                *old_limit = RLimit {
+                    cur: 1024,
+                    max: 1024,
+                };
             }
             Ok(0)
         }
         RLIMIT_RSS | RLIMIT_AS => {
             if !old_limit.is_null() {
-                proc.vm.check_write_ptr(old_limit)?;
-                unsafe {
-                    // 1GB
-                    *old_limit = RLimit {
-                        cur: 1024 * 1024 * 1024,
-                        max: 1024 * 1024 * 1024,
-                    };
-                }
+                let old_limit = unsafe { proc.vm.check_write_ptr(old_limit)? };
+                // 1GB
+                *old_limit = RLimit {
+                    cur: 1024 * 1024 * 1024,
+                    max: 1024 * 1024 * 1024,
+                };
             }
             Ok(0)
         }
@@ -201,3 +191,18 @@ pub struct RLimit {
     cur: u64, // soft limit
     max: u64, // hard limit
 }
+
+pub fn sys_getrandom(buf: *mut u8, len: usize, flag: u32) -> SysResult {
+    //info!("getrandom: buf: {:?}, len: {:?}, falg {:?}", buf, len,flag);
+    let mut proc = process();
+    let slice = unsafe { proc.vm.check_write_array(buf, len)? };
+    let mut i = 0;
+    for elm in slice {
+        unsafe {
+            *elm = i + crate::trap::TICK as u8;
+        }
+        i += 1;
+    }
+
+    Ok(len)
+}
diff --git a/kernel/src/syscall/mod.rs b/kernel/src/syscall/mod.rs
index 1545af6..066d0a6 100644
--- a/kernel/src/syscall/mod.rs
+++ b/kernel/src/syscall/mod.rs
@@ -31,13 +31,25 @@ mod net;
 mod proc;
 mod time;
 
+use spin::Mutex;
+use alloc::collections::BTreeMap;
+
+#[cfg(feature = "profile")]
+lazy_static! {
+    static ref SYSCALL_TIMING: Mutex<BTreeMap<usize, i64>> = Mutex::new(BTreeMap::new());
+}
+
 /// System call dispatcher
 // This #[deny(unreachable_patterns)] checks if each match arm is defined
 // See discussion in https://github.com/oscourse-tsinghua/rcore_plus/commit/17e644e54e494835f1a49b34b80c2c4f15ed0dbe.
 #[deny(unreachable_patterns)]
 pub fn syscall(id: usize, args: [usize; 6], tf: &mut TrapFrame) -> isize {
+    #[cfg(feature = "profile")]
+    let begin_time = unsafe {
+        core::arch::x86_64::_rdtsc()
+    };
     let cid = cpu::id();
-    let pid = { process().pid.clone() };
+    let pid = process().pid.clone();
     let tid = processor().tid();
     if !pid.is_init() {
         // we trust pid 0 process
@@ -48,50 +60,85 @@ pub fn syscall(id: usize, args: [usize; 6], tf: &mut TrapFrame) -> isize {
     // See https://filippo.io/linux-syscall-table/
     // And https://fedora.juszkiewicz.com.pl/syscalls.html.
     let ret = match id {
-        // 0
+        // file
         SYS_READ => sys_read(args[0], args[1] as *mut u8, args[2]),
         SYS_WRITE => sys_write(args[0], args[1] as *const u8, args[2]),
+        SYS_OPENAT => sys_openat(args[0], args[1] as *const u8, args[2], args[3]),
         SYS_CLOSE => sys_close(args[0]),
         SYS_FSTAT => sys_fstat(args[0], args[1] as *mut Stat),
+        SYS_NEWFSTATAT => sys_fstatat(args[0], args[1] as *const u8, args[2] as *mut Stat, args[3]),
         SYS_LSEEK => sys_lseek(args[0], args[1] as i64, args[2] as u8),
-        SYS_MMAP => sys_mmap(args[0], args[1], args[2], args[3], args[4], args[5]),
-        // 10
-        SYS_MPROTECT => sys_mprotect(args[0], args[1], args[2]),
-        SYS_MUNMAP => sys_munmap(args[0], args[1]),
-        SYS_BRK => {
-            warn!("sys_brk is unimplemented");
-            Ok(0)
-        }
-        SYS_RT_SIGACTION => {
-            warn!("sys_sigaction is unimplemented");
-            Ok(0)
-        }
-        SYS_RT_SIGPROCMASK => {
-            warn!("sys_sigprocmask is unimplemented");
-            Ok(0)
-        }
         SYS_IOCTL => sys_ioctl(args[0], args[1], args[2], args[3], args[4]),
         SYS_PREAD64 => sys_pread(args[0], args[1] as *mut u8, args[2], args[3]),
         SYS_PWRITE64 => sys_pwrite(args[0], args[1] as *const u8, args[2], args[3]),
         SYS_READV => sys_readv(args[0], args[1] as *const IoVec, args[2]),
-        // 20
         SYS_WRITEV => sys_writev(args[0], args[1] as *const IoVec, args[2]),
-        SYS_SCHED_YIELD => sys_yield(),
-        SYS_MADVISE => {
-            warn!("sys_madvise is unimplemented");
-            Ok(0)
-        }
-        SYS_NANOSLEEP => sys_nanosleep(args[0] as *const TimeSpec),
-        SYS_SETITIMER => {
-            warn!("sys_setitimer is unimplemented");
-            Ok(0)
+        SYS_SENDFILE => sys_sendfile(args[0], args[1], args[2] as *mut usize, args[3]),
+        SYS_FCNTL => unimplemented("fcntl", Ok(0)),
+        SYS_FLOCK => unimplemented("flock", Ok(0)),
+        SYS_FSYNC => sys_fsync(args[0]),
+        SYS_FDATASYNC => sys_fdatasync(args[0]),
+        SYS_TRUNCATE => sys_truncate(args[0] as *const u8, args[1]),
+        SYS_FTRUNCATE => sys_ftruncate(args[0], args[1]),
+        SYS_GETDENTS64 => sys_getdents64(args[0], args[1] as *mut LinuxDirent64, args[2]),
+        SYS_GETCWD => sys_getcwd(args[0] as *mut u8, args[1]),
+        SYS_CHDIR => sys_chdir(args[0] as *const u8),
+        SYS_RENAMEAT => sys_renameat(args[0], args[1] as *const u8, args[2], args[3] as *const u8),
+        SYS_MKDIRAT => sys_mkdirat(args[0], args[1] as *const u8, args[2]),
+        SYS_LINKAT => sys_linkat(
+            args[0],
+            args[1] as *const u8,
+            args[2],
+            args[3] as *const u8,
+            args[4],
+        ),
+        SYS_UNLINKAT => sys_unlinkat(args[0], args[1] as *const u8, args[2]),
+        SYS_SYMLINKAT => unimplemented("symlinkat", Err(SysError::EACCES)),
+        SYS_READLINKAT => {
+            sys_readlinkat(args[0], args[1] as *const u8, args[2] as *mut u8, args[3])
         }
-        SYS_GETPID => sys_getpid(),
-        // 40
-        SYS_SENDFILE => sys_sendfile(args[0], args[1], args[3] as *mut usize, args[4]),
+        SYS_FCHMOD => unimplemented("fchmod", Ok(0)),
+        SYS_FCHMODAT => unimplemented("fchmodat", Ok(0)),
+        SYS_FCHOWN => unimplemented("fchown", Ok(0)),
+        SYS_FCHOWNAT => unimplemented("fchownat", Ok(0)),
+        SYS_FACCESSAT => sys_faccessat(args[0], args[1] as *const u8, args[2], args[3]),
+        SYS_DUP3 => sys_dup2(args[0], args[1]), // TODO: handle `flags`
+        SYS_PIPE2 => sys_pipe(args[0] as *mut u32), // TODO: handle `flags`
+        SYS_UTIMENSAT => unimplemented("utimensat", Ok(0)),
+
+        // io multiplexing
+        SYS_PPOLL => sys_ppoll(args[0] as *mut PollFd, args[1], args[2] as *const TimeSpec), // ignore sigmask
+        SYS_EPOLL_CREATE1 => unimplemented("epoll_create1", Err(SysError::ENOSYS)),
+
+        // file system
+        SYS_STATFS => unimplemented("statfs", Err(SysError::EACCES)),
+        SYS_FSTATFS => unimplemented("fstatfs", Err(SysError::EACCES)),
+        SYS_SYNC => sys_sync(),
+        SYS_MOUNT => unimplemented("mount", Err(SysError::EACCES)),
+        SYS_UMOUNT2 => unimplemented("umount2", Err(SysError::EACCES)),
+
+        // memory
+        SYS_BRK => unimplemented("brk", Err(SysError::ENOMEM)),
+        SYS_MMAP => sys_mmap(args[0], args[1], args[2], args[3], args[4], args[5]),
+        SYS_MPROTECT => sys_mprotect(args[0], args[1], args[2]),
+        SYS_MUNMAP => sys_munmap(args[0], args[1]),
+        SYS_MADVISE => unimplemented("madvise", Ok(0)),
+
+        // signal
+        SYS_RT_SIGACTION => unimplemented("sigaction", Ok(0)),
+        SYS_RT_SIGPROCMASK => unimplemented("sigprocmask", Ok(0)),
+        SYS_SIGALTSTACK => unimplemented("sigaltstack", Ok(0)),
+        SYS_KILL => sys_kill(args[0], args[1]),
+
+        // schedule
+        SYS_SCHED_YIELD => sys_yield(),
+        SYS_SCHED_GETAFFINITY => sys_sched_getaffinity(args[0], args[1], args[2] as *mut u32),
+
+        // socket
         SYS_SOCKET => sys_socket(args[0], args[1], args[2]),
         SYS_CONNECT => sys_connect(args[0], args[1] as *const SockAddr, args[2]),
         SYS_ACCEPT => sys_accept(args[0], args[1] as *mut SockAddr, args[2] as *mut u32),
+        SYS_ACCEPT4 => sys_accept(args[0], args[1] as *mut SockAddr, args[2] as *mut u32), // use accept for accept4
         SYS_SENDTO => sys_sendto(
             args[0],
             args[1] as *const u8,
@@ -112,7 +159,6 @@ pub fn syscall(id: usize, args: [usize; 6], tf: &mut TrapFrame) -> isize {
         SYS_RECVMSG => sys_recvmsg(args[0], args[1] as *mut MsgHdr, args[2]),
         SYS_SHUTDOWN => sys_shutdown(args[0], args[1]),
         SYS_BIND => sys_bind(args[0], args[1] as *const SockAddr, args[2]),
-        // 50
         SYS_LISTEN => sys_listen(args[0], args[1]),
         SYS_GETSOCKNAME => sys_getsockname(args[0], args[1] as *mut SockAddr, args[2] as *mut u32),
         SYS_GETPEERNAME => sys_getpeername(args[0], args[1] as *mut SockAddr, args[2] as *mut u32),
@@ -124,6 +170,8 @@ pub fn syscall(id: usize, args: [usize; 6], tf: &mut TrapFrame) -> isize {
             args[3] as *mut u8,
             args[4] as *mut u32,
         ),
+
+        // process
         SYS_CLONE => sys_clone(
             args[0],
             args[1],
@@ -138,180 +186,75 @@ pub fn syscall(id: usize, args: [usize; 6], tf: &mut TrapFrame) -> isize {
             args[2] as *const *const u8,
             tf,
         ),
-        // 60
         SYS_EXIT => sys_exit(args[0] as usize),
+        SYS_EXIT_GROUP => sys_exit_group(args[0]),
         SYS_WAIT4 => sys_wait4(args[0] as isize, args[1] as *mut i32), // TODO: wait4
-        SYS_KILL => sys_kill(args[0], args[1]),
-        SYS_UNAME => sys_uname(args[0] as *mut u8),
-        SYS_FCNTL => {
-            warn!("sys_fcntl is unimplemented");
-            Ok(0)
-        }
-        SYS_FLOCK => {
-            warn!("sys_flock is unimplemented");
-            Ok(0)
-        }
-        SYS_FSYNC => sys_fsync(args[0]),
-        SYS_FDATASYNC => sys_fdatasync(args[0]),
-        SYS_TRUNCATE => sys_truncate(args[0] as *const u8, args[1]),
-        SYS_FTRUNCATE => sys_ftruncate(args[0], args[1]),
-        SYS_GETCWD => sys_getcwd(args[0] as *mut u8, args[1]),
-        // 80
-        SYS_CHDIR => sys_chdir(args[0] as *const u8),
-        SYS_FCHMOD => {
-            warn!("sys_fchmod is unimplemented");
-            Ok(0)
-        }
-        SYS_FCHOWN => {
-            warn!("sys_fchown is unimplemented");
-            Ok(0)
-        }
-        SYS_UMASK => {
-            warn!("sys_umask is unimplemented");
-            Ok(0o777)
-        }
-        SYS_GETTIMEOFDAY => sys_gettimeofday(args[0] as *mut TimeVal, args[1] as *const u8),
-        //        SYS_GETRLIMIT => sys_getrlimit(),
-        SYS_GETRUSAGE => sys_getrusage(args[0], args[1] as *mut RUsage),
-        SYS_SYSINFO => sys_sysinfo(args[0] as *mut SysInfo),
-        SYS_GETUID => {
-            warn!("sys_getuid is unimplemented");
-            Ok(0)
-        }
-        SYS_GETGID => {
-            warn!("sys_getgid is unimplemented");
-            Ok(0)
-        }
-        SYS_SETUID => {
-            warn!("sys_setuid is unimplemented");
-            Ok(0)
-        }
-        SYS_GETEUID => {
-            warn!("sys_geteuid is unimplemented");
-            Ok(0)
-        }
-        SYS_GETEGID => {
-            warn!("sys_getegid is unimplemented");
-            Ok(0)
-        }
-        SYS_SETPGID => {
-            warn!("sys_setpgid is unimplemented");
-            Ok(0)
-        }
-        // 110
-        SYS_GETPPID => sys_getppid(),
-        SYS_SETSID => {
-            warn!("sys_setsid is unimplemented");
-            Ok(0)
-        }
-        SYS_GETPGID => {
-            warn!("sys_getpgid is unimplemented");
-            Ok(0)
-        }
-        SYS_GETGROUPS=> {
-            warn!("sys_getgroups is unimplemented");
-            Ok(0)
-        }
-        SYS_SETGROUPS=> {
-            warn!("sys_setgroups is unimplemented");
-            Ok(0)
-        }
-        SYS_SIGALTSTACK => {
-            warn!("sys_sigaltstack is unimplemented");
-            Ok(0)
-        }
-        SYS_STATFS => {
-            warn!("statfs is unimplemented");
-            Err(SysError::EACCES)
-        }
-        SYS_FSTATFS => {
-            warn!("fstatfs is unimplemented");
-            Err(SysError::EACCES)
-        }
-        SYS_SETPRIORITY => sys_set_priority(args[0]),
-        //        SYS_SETRLIMIT => sys_setrlimit(),
-        SYS_SYNC => sys_sync(),
-        SYS_MOUNT => {
-            warn!("mount is unimplemented");
-            Err(SysError::EACCES)
-        }
-        SYS_UMOUNT2 => {
-            warn!("umount2 is unimplemented");
-            Err(SysError::EACCES)
-        }
-        SYS_REBOOT => sys_reboot(
-            args[0] as u32,
-            args[1] as u32,
-            args[2] as u32,
-            args[3] as *const u8,
-        ),
-        SYS_GETTID => sys_gettid(),
+        SYS_SET_TID_ADDRESS => unimplemented("set_tid_address", Ok(thread::current().id())),
         SYS_FUTEX => sys_futex(
             args[0],
             args[1] as u32,
             args[2] as i32,
             args[3] as *const TimeSpec,
         ),
-        SYS_SCHED_GETAFFINITY => sys_sched_getaffinity(args[0], args[1], args[2] as *mut u32),
-        SYS_GETDENTS64 => sys_getdents64(args[0], args[1] as *mut LinuxDirent64, args[2]),
-        SYS_SET_TID_ADDRESS => {
-            warn!("sys_set_tid_address is unimplemented");
-            Ok(thread::current().id())
-        }
+
+        // time
+        SYS_NANOSLEEP => sys_nanosleep(args[0] as *const TimeSpec),
+        SYS_SETITIMER => unimplemented("setitimer", Ok(0)),
+        SYS_GETTIMEOFDAY => sys_gettimeofday(args[0] as *mut TimeVal, args[1] as *const u8),
         SYS_CLOCK_GETTIME => sys_clock_gettime(args[0], args[1] as *mut TimeSpec),
-        SYS_EXIT_GROUP => sys_exit_group(args[0]),
-        SYS_OPENAT => sys_openat(args[0], args[1] as *const u8, args[2], args[3]),
-        SYS_MKDIRAT => sys_mkdirat(args[0], args[1] as *const u8, args[2]),
-        //        SYS_MKNODAT => sys_mknod(),
-        // 260
-        SYS_FCHOWNAT => {
-            warn!("sys_fchownat is unimplemented");
-            Ok(0)
-        }
-        SYS_NEWFSTATAT => sys_fstatat(args[0], args[1] as *const u8, args[2] as *mut Stat, args[3]),
-        SYS_UNLINKAT => sys_unlinkat(args[0], args[1] as *const u8, args[2]),
-        SYS_READLINKAT => {
-            sys_readlinkat(args[0], args[1] as *const u8, args[2] as *mut u8, args[3])
-        }
-        SYS_RENAMEAT => sys_renameat(args[0], args[1] as *const u8, args[2], args[3] as *const u8),
-        SYS_LINKAT => sys_linkat(
-            args[0],
-            args[1] as *const u8,
-            args[2],
-            args[3] as *const u8,
-            args[4],
-        ),
-        SYS_SYMLINKAT => Err(SysError::EACCES),
-        SYS_FACCESSAT => sys_faccessat(args[0], args[1] as *const u8, args[2], args[3]),
-        SYS_PPOLL => sys_ppoll(args[0] as *mut PollFd, args[1], args[2] as *const TimeSpec), // ignore sigmask
-        // 280
-        SYS_UTIMENSAT => {
-            warn!("sys_utimensat is unimplemented");
-            Ok(0)
-        }
-        SYS_ACCEPT4 => sys_accept(args[0], args[1] as *mut SockAddr, args[2] as *mut u32), // use accept for accept4
-        SYS_EPOLL_CREATE1 => {
-            warn!("sys_epoll_create1 is unimplemented");
-            Err(SysError::ENOSYS)
-        }
-        SYS_DUP3 => sys_dup2(args[0], args[1]), // TODO: handle `flags`
-        SYS_PIPE2 => sys_pipe(args[0] as *mut u32), // TODO: handle `flags`
+
+        // system
+        SYS_GETPID => sys_getpid(),
+        SYS_GETTID => sys_gettid(),
+        SYS_UNAME => sys_uname(args[0] as *mut u8),
+        SYS_UMASK => unimplemented("umask", Ok(0o777)),
+        //        SYS_GETRLIMIT => sys_getrlimit(),
+        //        SYS_SETRLIMIT => sys_setrlimit(),
+        SYS_GETRUSAGE => sys_getrusage(args[0], args[1] as *mut RUsage),
+        SYS_SYSINFO => sys_sysinfo(args[0] as *mut SysInfo),
+        SYS_TIMES => sys_times(args[0] as *mut Tms),
+        SYS_GETUID => unimplemented("getuid", Ok(0)),
+        SYS_GETGID => unimplemented("getgid", Ok(0)),
+        SYS_SETUID => unimplemented("setuid", Ok(0)),
+        SYS_GETEUID => unimplemented("geteuid", Ok(0)),
+        SYS_GETEGID => unimplemented("getegid", Ok(0)),
+        SYS_SETPGID => unimplemented("setpgid", Ok(0)),
+        SYS_GETPPID => sys_getppid(),
+        SYS_SETSID => unimplemented("setsid", Ok(0)),
+        SYS_GETPGID => unimplemented("getpgid", Ok(0)),
+        SYS_GETGROUPS => unimplemented("getgroups", Ok(0)),
+        SYS_SETGROUPS => unimplemented("setgroups", Ok(0)),
+        SYS_SETPRIORITY => sys_set_priority(args[0]),
+        SYS_PRCTL => unimplemented("prctl", Ok(0)),
         SYS_PRLIMIT64 => sys_prlimit64(
             args[0],
             args[1],
             args[2] as *const RLimit,
             args[3] as *mut RLimit,
         ),
-        // custom temporary syscall
+        SYS_REBOOT => sys_reboot(
+            args[0] as u32,
+            args[1] as u32,
+            args[2] as u32,
+            args[3] as *const u8,
+        ),
+
+        // custom
         SYS_MAP_PCI_DEVICE => sys_map_pci_device(args[0], args[1]),
         SYS_GET_PADDR => sys_get_paddr(args[0] as *const u64, args[1] as *mut u64, args[2]),
-
+        //SYS_GETRANDOM => unimplemented("getrandom", Err(SysError::EINVAL)),
+        SYS_GETRANDOM => sys_getrandom(args[0] as *mut u8, args[1] as usize, args[2] as u32),
+        SYS_TKILL => unimplemented("tkill", Ok(0)),
         _ => {
-            #[cfg(target_arch = "x86_64")]
-            let x86_64_ret = x86_64_syscall(id, args, tf);
-            #[cfg(not(target_arch = "x86_64"))]
-            let x86_64_ret = None;
-            if let Some(ret) = x86_64_ret {
+            let ret = match () {
+                #[cfg(target_arch = "x86_64")]
+                () => x86_64_syscall(id, args, tf),
+                #[cfg(target_arch = "mips")]
+                () => mips_syscall(id, args, tf),
+                #[cfg(all(not(target_arch = "x86_64"), not(target_arch = "mips")))]
+                () => None,
+            };
+            if let Some(ret) = ret {
                 ret
             } else {
                 error!("unknown syscall id: {}, args: {:x?}", id, args);
@@ -321,10 +264,22 @@ pub fn syscall(id: usize, args: [usize; 6], tf: &mut TrapFrame) -> isize {
     };
     if !pid.is_init() {
         // we trust pid 0 process
-        debug!(
-            "{}:{}:{} syscall id {} ret with {:x?}",
-            cid, pid, tid, id, ret
-        );
+        info!("=> {:x?}", ret);
+    }
+    #[cfg(feature = "profile")]
+    {
+        let end_time = unsafe {
+            core::arch::x86_64::_rdtsc()
+        };
+        *SYSCALL_TIMING.lock().entry(id).or_insert(0) += end_time - begin_time;
+        if end_time % 1000 == 0 {
+            let timing = SYSCALL_TIMING.lock();
+            let mut count_vec: Vec<(&usize, &i64)> = timing.iter().collect();
+            count_vec.sort_by(|a, b| b.1.cmp(a.1));
+            for (id, time) in count_vec.iter().take(5) {
+                warn!("timing {:03} time {:012}", id, time);
+            }
+        }
     }
     match ret {
         Ok(code) => code as isize,
@@ -332,6 +287,53 @@ pub fn syscall(id: usize, args: [usize; 6], tf: &mut TrapFrame) -> isize {
     }
 }
 
+fn unimplemented(name: &str, ret: SysResult) -> SysResult {
+    warn!("{} is unimplemented", name);
+    ret
+}
+
+#[cfg(target_arch = "mips")]
+fn mips_syscall(id: usize, args: [usize; 6], tf: &mut TrapFrame) -> Option<SysResult> {
+    let ret = match id {
+        SYS_OPEN => sys_open(args[0] as *const u8, args[1], args[2]),
+        SYS_POLL => sys_poll(args[0] as *mut PollFd, args[1], args[2]),
+        SYS_DUP2 => sys_dup2(args[0], args[1]),
+        SYS_FORK => sys_fork(tf),
+        SYS_MMAP2 => sys_mmap(args[0], args[1], args[2], args[3], args[4], args[5] * 4096),
+        SYS_FSTAT64 => sys_fstat(args[0], args[1] as *mut Stat),
+        SYS_LSTAT64 => sys_lstat(args[0] as *const u8, args[1] as *mut Stat),
+        SYS_STAT64 => sys_stat(args[0] as *const u8, args[1] as *mut Stat),
+        SYS_PIPE => {
+            let fd_ptr = args[0] as *mut u32;
+            match sys_pipe(fd_ptr) {
+                Ok(code) => {
+                    unsafe {
+                        tf.v0 = *fd_ptr as usize;
+                        tf.v1 = *(fd_ptr.add(1)) as usize;
+                    }
+                    Ok(tf.v0)
+                }
+                Err(err) => Err(err),
+            }
+        }
+        SYS_FCNTL64 => unimplemented("fcntl64", Ok(0)),
+        SYS_SET_THREAD_AREA => {
+            info!("set_thread_area: tls: 0x{:x}", args[0]);
+            extern "C" {
+                fn _cur_tls();
+            }
+
+            unsafe {
+                asm!("mtc0 $0, $$4, 2": :"r"(args[0]));
+                *(_cur_tls as *mut usize) = args[0];
+            }
+            Ok(0)
+        }
+        _ => return None,
+    };
+    Some(ret)
+}
+
 #[cfg(target_arch = "x86_64")]
 fn x86_64_syscall(id: usize, args: [usize; 6], tf: &mut TrapFrame) -> Option<SysResult> {
     let ret = match id {
@@ -349,37 +351,21 @@ fn x86_64_syscall(id: usize, args: [usize; 6], tf: &mut TrapFrame) -> Option<Sys
             args[4] as *const TimeVal,
         ),
         SYS_DUP2 => sys_dup2(args[0], args[1]),
-        SYS_ALARM => {
-            warn!("sys_alarm is unimplemented");
-            Ok(0)
-        }
+        SYS_ALARM => unimplemented("alarm", Ok(0)),
         SYS_FORK => sys_fork(tf),
-        // use fork for vfork
-        SYS_VFORK => sys_fork(tf),
+        SYS_VFORK => sys_vfork(tf),
         SYS_RENAME => sys_rename(args[0] as *const u8, args[1] as *const u8),
         SYS_MKDIR => sys_mkdir(args[0] as *const u8, args[1]),
         SYS_RMDIR => sys_rmdir(args[0] as *const u8),
         SYS_LINK => sys_link(args[0] as *const u8, args[1] as *const u8),
         SYS_UNLINK => sys_unlink(args[0] as *const u8),
         SYS_READLINK => sys_readlink(args[0] as *const u8, args[1] as *mut u8, args[2]),
-        // 90
-        SYS_CHMOD => {
-            warn!("sys_chmod is unimplemented");
-            Ok(0)
-        }
-        SYS_CHOWN => {
-            warn!("sys_chown is unimplemented");
-            Ok(0)
-        }
+        SYS_CHMOD => unimplemented("chmod", Ok(0)),
+        SYS_CHOWN => unimplemented("chown", Ok(0)),
         SYS_ARCH_PRCTL => sys_arch_prctl(args[0] as i32, args[1], tf),
         SYS_TIME => sys_time(args[0] as *mut u64),
-        SYS_EPOLL_CREATE => {
-            warn!("sys_epoll_create is unimplemented");
-            Err(SysError::ENOSYS)
-        }
-        _ => {
-            return None;
-        }
+        SYS_EPOLL_CREATE => unimplemented("epoll_create", Err(SysError::ENOSYS)),
+        _ => return None,
     };
     Some(ret)
 }
diff --git a/kernel/src/syscall/net.rs b/kernel/src/syscall/net.rs
index 1372340..af28065 100644
--- a/kernel/src/syscall/net.rs
+++ b/kernel/src/syscall/net.rs
@@ -39,8 +39,7 @@ pub fn sys_socket(domain: usize, socket_type: usize, protocol: usize) -> SysResu
         },
         _ => return Err(SysError::EAFNOSUPPORT),
     };
-    let fd = proc.get_free_fd();
-    proc.files.insert(fd, FileLike::Socket(socket));
+    let fd = proc.add_file(FileLike::Socket(socket));
     Ok(fd)
 }
 
@@ -56,8 +55,7 @@ pub fn sys_setsockopt(
         fd, level, optname
     );
     let mut proc = process();
-    proc.vm.check_read_array(optval, optlen)?;
-    let data = unsafe { slice::from_raw_parts(optval, optlen) };
+    let data = unsafe { proc.vm.check_read_array(optval, optlen)? };
     let socket = proc.get_socket(fd)?;
     socket.setsockopt(level, optname, data)
 }
@@ -74,23 +72,19 @@ pub fn sys_getsockopt(
         fd, level, optname, optval, optlen
     );
     let proc = process();
-    proc.vm.check_write_ptr(optlen)?;
+    let optlen = unsafe { proc.vm.check_write_ptr(optlen)? };
     match level {
         SOL_SOCKET => match optname {
             SO_SNDBUF => {
-                proc.vm.check_write_array(optval, 4)?;
-                unsafe {
-                    *(optval as *mut u32) = crate::net::TCP_SENDBUF as u32;
-                    *optlen = 4;
-                }
+                let optval = unsafe { proc.vm.check_write_ptr(optval as *mut u32)? };
+                *optval = crate::net::TCP_SENDBUF as u32;
+                *optlen = 4;
                 Ok(0)
             }
             SO_RCVBUF => {
-                proc.vm.check_write_array(optval, 4)?;
-                unsafe {
-                    *(optval as *mut u32) = crate::net::TCP_RECVBUF as u32;
-                    *optlen = 4;
-                }
+                let optval = unsafe { proc.vm.check_write_ptr(optval as *mut u32)? };
+                *optval = crate::net::TCP_RECVBUF as u32;
+                *optlen = 4;
                 Ok(0)
             }
             _ => Err(SysError::ENOPROTOOPT),
@@ -130,9 +124,8 @@ pub fn sys_sendto(
     );
 
     let mut proc = process();
-    proc.vm.check_read_array(base, len)?;
 
-    let slice = unsafe { slice::from_raw_parts(base, len) };
+    let slice = unsafe { proc.vm.check_read_array(base, len)? };
     let endpoint = if addr.is_null() {
         None
     } else {
@@ -158,10 +151,9 @@ pub fn sys_recvfrom(
     );
 
     let mut proc = process();
-    proc.vm.check_write_array(base, len)?;
 
+    let mut slice = unsafe { proc.vm.check_write_array(base, len)? };
     let socket = proc.get_socket(fd)?;
-    let mut slice = unsafe { slice::from_raw_parts_mut(base, len) };
     let (result, endpoint) = socket.read(&mut slice);
 
     if result.is_ok() && !addr.is_null() {
@@ -177,9 +169,8 @@ pub fn sys_recvfrom(
 pub fn sys_recvmsg(fd: usize, msg: *mut MsgHdr, flags: usize) -> SysResult {
     info!("recvmsg: fd: {}, msg: {:?}, flags: {}", fd, msg, flags);
     let mut proc = process();
-    proc.vm.check_read_ptr(msg)?;
-    let hdr = unsafe { &mut *msg };
-    let mut iovs = IoVecs::check_and_new(hdr.msg_iov, hdr.msg_iovlen, &proc.vm, true)?;
+    let hdr = unsafe { proc.vm.check_write_ptr(msg)? };
+    let mut iovs = unsafe { IoVecs::check_and_new(hdr.msg_iov, hdr.msg_iovlen, &proc.vm, true)? };
 
     let mut buf = iovs.new_buf(true);
     let socket = proc.get_socket(fd)?;
@@ -237,8 +228,7 @@ pub fn sys_accept(fd: usize, addr: *mut SockAddr, addr_len: *mut u32) -> SysResu
     let socket = proc.get_socket(fd)?;
     let (new_socket, remote_endpoint) = socket.accept()?;
 
-    let new_fd = proc.get_free_fd();
-    proc.files.insert(new_fd, FileLike::Socket(new_socket));
+    let new_fd = proc.add_file(FileLike::Socket(new_socket));
 
     if !addr.is_null() {
         let sockaddr_in = SockAddr::from(remote_endpoint);
@@ -408,16 +398,16 @@ fn sockaddr_to_endpoint(
     if len < size_of::<u16>() {
         return Err(SysError::EINVAL);
     }
-    proc.vm.check_read_array(addr as *const u8, len)?;
+    let addr = unsafe { proc.vm.check_read_ptr(addr)? };
     unsafe {
-        match AddressFamily::from((*addr).family) {
+        match AddressFamily::from(addr.family) {
             AddressFamily::Internet => {
                 if len < size_of::<SockAddrIn>() {
                     return Err(SysError::EINVAL);
                 }
-                let port = u16::from_be((*addr).addr_in.sin_port);
+                let port = u16::from_be(addr.addr_in.sin_port);
                 let addr = IpAddress::from(Ipv4Address::from_bytes(
-                    &u32::from_be((*addr).addr_in.sin_addr).to_be_bytes()[..],
+                    &u32::from_be(addr.addr_in.sin_addr).to_be_bytes()[..],
                 ));
                 Ok(Endpoint::Ip((addr, port).into()))
             }
@@ -427,7 +417,7 @@ fn sockaddr_to_endpoint(
                     return Err(SysError::EINVAL);
                 }
                 Ok(Endpoint::LinkLevel(LinkLevelEndpoint::new(
-                    (*addr).addr_ll.sll_ifindex as usize,
+                    addr.addr_ll.sll_ifindex as usize,
                 )))
             }
             AddressFamily::Netlink => {
@@ -435,8 +425,8 @@ fn sockaddr_to_endpoint(
                     return Err(SysError::EINVAL);
                 }
                 Ok(Endpoint::Netlink(NetlinkEndpoint::new(
-                    (*addr).addr_nl.nl_pid,
-                    (*addr).addr_nl.nl_groups,
+                    addr.addr_nl.nl_pid,
+                    addr.addr_nl.nl_groups,
                 )))
             }
             _ => Err(SysError::EINVAL),
@@ -458,7 +448,7 @@ impl SockAddr {
             return Ok(0);
         }
 
-        proc.vm.check_write_ptr(addr_len)?;
+        let addr_len = unsafe { proc.vm.check_write_ptr(addr_len)? };
         let max_addr_len = *addr_len as usize;
         let full_len = match AddressFamily::from(self.family) {
             AddressFamily::Internet => size_of::<SockAddrIn>(),
@@ -470,12 +460,11 @@ impl SockAddr {
 
         let written_len = min(max_addr_len, full_len);
         if written_len > 0 {
-            proc.vm.check_write_array(addr as *mut u8, written_len)?;
+            let target = unsafe { proc.vm.check_write_array(addr as *mut u8, written_len)? };
             let source = slice::from_raw_parts(&self as *const SockAddr as *const u8, written_len);
-            let target = slice::from_raw_parts_mut(addr as *mut u8, written_len);
             target.copy_from_slice(source);
         }
-        addr_len.write(full_len as u32);
+        *addr_len = full_len as u32;
         return Ok(0);
     }
 }
diff --git a/kernel/src/syscall/proc.rs b/kernel/src/syscall/proc.rs
index 1159ff3..9fcb97e 100644
--- a/kernel/src/syscall/proc.rs
+++ b/kernel/src/syscall/proc.rs
@@ -6,14 +6,20 @@ use crate::fs::INodeExt;
 /// Fork the current process. Return the child's PID.
 pub fn sys_fork(tf: &TrapFrame) -> SysResult {
     let new_thread = current_thread().fork(tf);
-    let pid = processor().manager().add(new_thread);
+    let pid = new_thread.proc.lock().pid.get();
+    let tid = processor().manager().add(new_thread);
+    processor().manager().detach(tid);
     info!("fork: {} -> {}", thread::current().id(), pid);
     Ok(pid)
 }
 
+pub fn sys_vfork(tf: &TrapFrame) -> SysResult {
+    sys_fork(tf)
+}
+
 /// Create a new thread in the current process.
 /// The new thread's stack pointer will be set to `newsp`,
-///   and thread pointer will be set to `newtls`.
+/// and thread pointer will be set to `newtls`.
 /// The child tid will be stored at both `parent_tid` and `child_tid`.
 /// This is partially implemented for musl only.
 pub fn sys_clone(
@@ -26,40 +32,43 @@ pub fn sys_clone(
 ) -> SysResult {
     let clone_flags = CloneFlags::from_bits_truncate(flags);
     info!(
-        "clone: flags: {:?}, newsp: {:#x}, parent_tid: {:?}, child_tid: {:?}, newtls: {:#x}",
-        clone_flags, newsp, parent_tid, child_tid, newtls
+        "clone: flags: {:?} == {:#x}, newsp: {:#x}, parent_tid: {:?}, child_tid: {:?}, newtls: {:#x}",
+        clone_flags, flags, newsp, parent_tid, child_tid, newtls
     );
     if flags == 0x4111 || flags == 0x11 {
         warn!("sys_clone is calling sys_fork instead, ignoring other args");
         return sys_fork(tf);
     }
-    if flags != 0x7d0f00 {
-        warn!("sys_clone only support musl pthread_create");
-        return Err(SysError::ENOSYS);
-    }
-    {
-        let proc = process();
-        proc.vm.check_write_ptr(parent_tid)?;
-        proc.vm.check_write_ptr(child_tid)?;
+    if (flags != 0x7d0f00) && (flags != 0x5d0f00) {
+        //0x5d0f00 is the args from gcc of alpine linux
+        //warn!("sys_clone only support musl pthread_create");
+        panic!(
+            "sys_clone only support sys_fork OR musl pthread_create without flags{:x}",
+            flags
+        );
+        //return Err(SysError::ENOSYS);
     }
+    let parent_tid_ref = unsafe { process().vm.check_write_ptr(parent_tid)? };
+    let child_tid_ref = unsafe { process().vm.check_write_ptr(child_tid)? };
     let new_thread = current_thread().clone(tf, newsp, newtls, child_tid as usize);
     // FIXME: parent pid
     let tid = processor().manager().add(new_thread);
+    processor().manager().detach(tid);
     info!("clone: {} -> {}", thread::current().id(), tid);
-    unsafe {
-        parent_tid.write(tid as u32);
-        child_tid.write(tid as u32);
-    }
+    *parent_tid_ref = tid as u32;
+    *child_tid_ref = tid as u32;
     Ok(tid)
 }
 
 /// Wait for the process exit.
 /// Return the PID. Store exit code to `wstatus` if it's not null.
 pub fn sys_wait4(pid: isize, wstatus: *mut i32) -> SysResult {
-    info!("wait4: pid: {}, code: {:?}", pid, wstatus);
-    if !wstatus.is_null() {
-        process().vm.check_write_ptr(wstatus)?;
-    }
+    //info!("wait4: pid: {}, code: {:?}", pid, wstatus);
+    let wstatus = if !wstatus.is_null() {
+        Some(unsafe { process().vm.check_write_ptr(wstatus)? })
+    } else {
+        None
+    };
     #[derive(Debug)]
     enum WaitFor {
         AnyChild,
@@ -84,10 +93,8 @@ pub fn sys_wait4(pid: isize, wstatus: *mut i32) -> SysResult {
         // if found, return
         if let Some((pid, exit_code)) = find {
             proc.child_exit_code.remove(&pid);
-            if !wstatus.is_null() {
-                unsafe {
-                    wstatus.write(exit_code as i32);
-                }
+            if let Some(wstatus) = wstatus {
+                *wstatus = exit_code as i32;
             }
             return Ok(pid);
         }
@@ -118,75 +125,71 @@ pub fn sys_wait4(pid: isize, wstatus: *mut i32) -> SysResult {
     }
 }
 
+/// Replaces the current ** process ** with a new process image
+///
+/// `argv` is an array of argument strings passed to the new program.
+/// `envp` is an array of strings, conventionally of the form `key=value`,
+/// which are passed as environment to the new program.
+///
+/// NOTICE: `argv` & `envp` can not be NULL (different from Linux)
+///
+/// NOTICE: for multi-thread programs
+/// A call to any exec function from a process with more than one thread
+/// shall result in all threads being terminated and the new executable image
+/// being loaded and executed.
 pub fn sys_exec(
-    name: *const u8,
+    path: *const u8,
     argv: *const *const u8,
     envp: *const *const u8,
     tf: &mut TrapFrame,
 ) -> SysResult {
-    info!("exec: name: {:?}, argv: {:?} envp: {:?}", name, argv, envp);
-    let proc = process();
-    let exec_name = if name.is_null() {
-        String::from("")
-    } else {
-        unsafe { proc.vm.check_and_clone_cstr(name)? }
-    };
+    info!(
+        "exec:BEG: path: {:?}, argv: {:?}, envp: {:?}",
+        path, argv, envp
+    );
+    let mut proc = process();
+    let path = unsafe { proc.vm.check_and_clone_cstr(path)? };
+    let args = unsafe { proc.vm.check_and_clone_cstr_array(argv)? };
+    let envs = unsafe { proc.vm.check_and_clone_cstr_array(envp)? };
 
-    if argv.is_null() {
-        return Err(SysError::EINVAL);
-    }
-    // Check and copy args to kernel
-    let mut args = Vec::new();
-    unsafe {
-        let mut current_argv = argv as *const *const u8;
-        proc.vm.check_read_ptr(current_argv)?;
-        while !(*current_argv).is_null() {
-            let arg = proc.vm.check_and_clone_cstr(*current_argv)?;
-            args.push(arg);
-            current_argv = current_argv.add(1);
-        }
-    }
-//    // Check and copy envs to kernel
-//    let mut envs = Vec::new();
-//    unsafe {
-//        let mut current_env = envp as *const *const u8;
-//        proc.vm.check_read_ptr(current_env)?;
-//        while !(*current_env).is_null() {
-//            let env = proc.vm.check_and_clone_cstr(*current_env)?;
-//            envs.push(env);
-//            current_env = current_env.add(1);
-//        }
-//    }
-//
     if args.is_empty() {
+        error!("exec: args is null");
         return Err(SysError::EINVAL);
     }
 
-    info!("EXEC: name:{:?} , args {:?}", exec_name, args);
+    info!(
+        "exec:STEP2: path: {:?}, args: {:?}, envs: {:?}",
+        path, args, envs
+    );
+
+    // Kill other threads
+    proc.threads.retain(|&tid| {
+        if tid != processor().tid() {
+            processor().manager().exit(tid, 1);
+        }
+        tid == processor().tid()
+    });
 
     // Read program file
-    //let path = args[0].as_str();
-    let exec_path = exec_name.as_str();
-    let inode = proc.lookup_inode(exec_path)?;
-    let buf = inode.read_as_vec()?;
+    let inode = proc.lookup_inode(&path)?;
 
     // Make new Thread
-    let iter = args.iter().map(|s| s.as_str());
-    let mut thread = Thread::new_user(buf.as_slice(), exec_path, iter);
-    thread.proc.lock().clone_for_exec(&proc);
+    let (mut vm, entry_addr, ustack_top) =
+        Thread::new_user_vm(&inode, &path, args, envs).map_err(|_| SysError::EINVAL)?;
 
     // Activate new page table
+    core::mem::swap(&mut proc.vm, &mut vm);
     unsafe {
-        thread.proc.lock().vm.activate();
+        proc.vm.activate();
     }
 
-    // Modify the TrapFrame
-    *tf = unsafe { thread.context.get_init_tf() };
+    // Modify exec path
+    proc.exec_path = path.clone();
 
-    // Swap Context but keep KStack
-    ::core::mem::swap(&mut current_thread().kstack, &mut thread.kstack);
-    ::core::mem::swap(current_thread(), &mut *thread);
+    // Modify the TrapFrame
+    *tf = TrapFrame::new_user_thread(entry_addr, ustack_top);
 
+    info!("exec:END: path: {:?}", path);
     Ok(0)
 }
 
@@ -319,8 +322,7 @@ pub fn sys_exit_group(exit_code: usize) -> ! {
 }
 
 pub fn sys_nanosleep(req: *const TimeSpec) -> SysResult {
-    process().vm.check_read_ptr(req)?;
-    let time = unsafe { req.read() };
+    let time = unsafe { *process().vm.check_read_ptr(req)? };
     info!("nanosleep: time: {:#?}", time);
     // TODO: handle spurious wakeup
     thread::sleep(time.to_duration());
diff --git a/kernel/src/syscall/time.rs b/kernel/src/syscall/time.rs
index dd5cfcd..0fc3f39 100644
--- a/kernel/src/syscall/time.rs
+++ b/kernel/src/syscall/time.rs
@@ -33,20 +33,20 @@ fn get_epoch_usec() -> u64 {
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]
 pub struct TimeVal {
-    sec: u64,
-    usec: u64,
+    sec: usize,
+    usec: usize,
 }
 
 impl TimeVal {
     pub fn to_msec(&self) -> u64 {
-        self.sec * MSEC_PER_SEC + self.usec / USEC_PER_MSEC
+        (self.sec as u64) * MSEC_PER_SEC + (self.usec as u64) / USEC_PER_MSEC
     }
 
     pub fn get_epoch() -> Self {
         let usec = get_epoch_usec();
         TimeVal {
-            sec: usec / USEC_PER_SEC,
-            usec: usec % USEC_PER_SEC,
+            sec: (usec / USEC_PER_SEC) as usize,
+            usec: (usec % USEC_PER_SEC) as usize,
         }
     }
 }
@@ -54,24 +54,24 @@ impl TimeVal {
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]
 pub struct TimeSpec {
-    sec: u64,
-    nsec: u64,
+    sec: usize,
+    nsec: usize,
 }
 
 impl TimeSpec {
     pub fn to_msec(&self) -> u64 {
-        self.sec * MSEC_PER_SEC + self.nsec / NSEC_PER_MSEC
+        (self.sec as u64) * MSEC_PER_SEC + (self.nsec as u64) / NSEC_PER_MSEC
     }
 
     pub fn to_duration(&self) -> Duration {
-        Duration::new(self.sec, self.nsec as u32)
+        Duration::new(self.sec as u64, self.nsec as u32)
     }
 
     pub fn get_epoch() -> Self {
         let usec = get_epoch_usec();
         TimeSpec {
-            sec: usec / USEC_PER_SEC,
-            nsec: usec % USEC_PER_SEC * NSEC_PER_USEC,
+            sec: (usec / USEC_PER_SEC) as usize,
+            nsec: (usec % USEC_PER_SEC * NSEC_PER_USEC) as usize,
         }
     }
 }
@@ -83,12 +83,10 @@ pub fn sys_gettimeofday(tv: *mut TimeVal, tz: *const u8) -> SysResult {
     }
 
     let proc = process();
-    proc.vm.check_write_ptr(tv)?;
+    let tv = unsafe { proc.vm.check_write_ptr(tv)? };
 
     let timeval = TimeVal::get_epoch();
-    unsafe {
-        *tv = timeval;
-    }
+    *tv = timeval;
     Ok(0)
 }
 
@@ -96,12 +94,10 @@ pub fn sys_clock_gettime(clock: usize, ts: *mut TimeSpec) -> SysResult {
     info!("clock_gettime: clock: {:?}, ts: {:?}", clock, ts);
 
     let proc = process();
-    proc.vm.check_write_ptr(ts)?;
+    let ts = unsafe { proc.vm.check_write_ptr(ts)? };
 
     let timespec = TimeSpec::get_epoch();
-    unsafe {
-        *ts = timespec;
-    }
+    *ts = timespec;
     Ok(0)
 }
 
@@ -109,10 +105,8 @@ pub fn sys_time(time: *mut u64) -> SysResult {
     let sec = get_epoch_usec() / USEC_PER_SEC;
     if time as usize != 0 {
         let proc = process();
-        proc.vm.check_write_ptr(time)?;
-        unsafe {
-            time.write(sec as u64);
-        }
+        let time = unsafe { proc.vm.check_write_ptr(time)? };
+        *time = sec as u64;
     }
     Ok(sec as usize)
 }
@@ -127,7 +121,7 @@ pub struct RUsage {
 pub fn sys_getrusage(who: usize, rusage: *mut RUsage) -> SysResult {
     info!("getrusage: who: {}, rusage: {:?}", who, rusage);
     let proc = process();
-    proc.vm.check_write_ptr(rusage)?;
+    let rusage = unsafe { proc.vm.check_write_ptr(rusage)? };
 
     let tick_base = *TICK_BASE;
     let tick = unsafe { crate::trap::TICK as u64 };
@@ -135,14 +129,42 @@ pub fn sys_getrusage(who: usize, rusage: *mut RUsage) -> SysResult {
     let usec = (tick - tick_base) * USEC_PER_TICK as u64;
     let new_rusage = RUsage {
         utime: TimeVal {
-            sec: usec / USEC_PER_SEC,
-            usec: usec % USEC_PER_SEC,
+            sec: (usec / USEC_PER_SEC) as usize,
+            usec: (usec % USEC_PER_SEC) as usize,
         },
         stime: TimeVal {
-            sec: usec / USEC_PER_SEC,
-            usec: usec % USEC_PER_SEC,
+            sec: (usec / USEC_PER_SEC) as usize,
+            usec: (usec % USEC_PER_SEC) as usize,
         },
     };
-    unsafe { *rusage = new_rusage };
+    *rusage = new_rusage;
     Ok(0)
 }
+
+#[repr(C)]
+#[derive(Debug, Copy, Clone)]
+pub struct Tms {
+    tms_utime: u64,  /* user time */
+    tms_stime: u64,  /* system time */
+    tms_cutime: u64, /* user time of children */
+    tms_cstime: u64, /* system time of children */
+}
+
+pub fn sys_times(buf: *mut Tms) -> SysResult {
+    info!("times: buf: {:?}", buf);
+    let proc = process();
+    let buf = unsafe { proc.vm.check_write_ptr(buf)? };
+
+    let tick_base = *TICK_BASE;
+    let tick = unsafe { crate::trap::TICK as u64 };
+
+    let new_buf = Tms {
+        tms_utime: 0,
+        tms_stime: 0,
+        tms_cutime: 0,
+        tms_cstime: 0,
+    };
+
+    *buf = new_buf;
+    Ok(tick as usize)
+}
diff --git a/riscv-pk b/riscv-pk
deleted file mode 160000
index 405ea59..0000000
--- a/riscv-pk
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 405ea59dd7dd2762c5883822f21d9995bea32b0c
diff --git a/tools/k210/kflash.py b/tools/k210/kflash.py
new file mode 100755
index 0000000..518c574
--- /dev/null
+++ b/tools/k210/kflash.py
@@ -0,0 +1,829 @@
+#!/usr/bin/env python3
+import sys
+import time
+import zlib
+import copy
+import struct
+from enum import Enum
+import binascii
+import hashlib
+import argparse
+import math
+import zipfile, tempfile
+import json
+import re
+import os
+
+BASH_TIPS = dict(NORMAL='\033[0m',BOLD='\033[1m',DIM='\033[2m',UNDERLINE='\033[4m',
+                    DEFAULT='\033[39', RED='\033[31m', YELLOW='\033[33m', GREEN='\033[32m',
+                    BG_DEFAULT='\033[49m', BG_WHITE='\033[107m')
+
+ERROR_MSG   = BASH_TIPS['RED']+BASH_TIPS['BOLD']+'[ERROR]'+BASH_TIPS['NORMAL']
+WARN_MSG    = BASH_TIPS['YELLOW']+BASH_TIPS['BOLD']+'[WARN]'+BASH_TIPS['NORMAL']
+INFO_MSG    = BASH_TIPS['GREEN']+BASH_TIPS['BOLD']+'[INFO]'+BASH_TIPS['NORMAL']
+
+VID_LIST_FOR_AUTO_LOOKUP = "(1A86)|(0403)|(067B)|(10C4)"
+#                            WCH    FTDI    PL     CL
+timeout = 0.5
+
+MAX_RETRY_TIMES = 10
+
+class TimeoutError(Exception): pass
+
+try:
+    import serial
+    import serial.tools.list_ports
+except ImportError:
+    print(ERROR_MSG,'PySerial must be installed, run '+BASH_TIPS['GREEN']+'`pip3 install pyserial`',BASH_TIPS['DEFAULT'])
+    sys.exit(1)
+
+# AES is from: https://github.com/ricmoo/pyaes, Copyright by Richard Moore
+class AES:
+    '''Encapsulates the AES block cipher.
+    You generally should not need this. Use the AESModeOfOperation classes
+    below instead.'''
+    @staticmethod
+    def _compact_word(word):
+        return (word[0] << 24) | (word[1] << 16) | (word[2] << 8) | word[3]
+
+    # Number of rounds by keysize
+    number_of_rounds = {16: 10, 24: 12, 32: 14}
+
+    # Round constant words
+    rcon = [ 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91 ]
+
+    # S-box and Inverse S-box (S is for Substitution)
+    S = [ 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 ]
+    Si =[ 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb, 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb, 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e, 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25, 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92, 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84, 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06, 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73, 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e, 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b, 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4, 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f, 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef, 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d ]
+
+    # Transformations for encryption
+    T1 = [ 0xc66363a5, 0xf87c7c84, 0xee777799, 0xf67b7b8d, 0xfff2f20d, 0xd66b6bbd, 0xde6f6fb1, 0x91c5c554, 0x60303050, 0x02010103, 0xce6767a9, 0x562b2b7d, 0xe7fefe19, 0xb5d7d762, 0x4dababe6, 0xec76769a, 0x8fcaca45, 0x1f82829d, 0x89c9c940, 0xfa7d7d87, 0xeffafa15, 0xb25959eb, 0x8e4747c9, 0xfbf0f00b, 0x41adadec, 0xb3d4d467, 0x5fa2a2fd, 0x45afafea, 0x239c9cbf, 0x53a4a4f7, 0xe4727296, 0x9bc0c05b, 0x75b7b7c2, 0xe1fdfd1c, 0x3d9393ae, 0x4c26266a, 0x6c36365a, 0x7e3f3f41, 0xf5f7f702, 0x83cccc4f, 0x6834345c, 0x51a5a5f4, 0xd1e5e534, 0xf9f1f108, 0xe2717193, 0xabd8d873, 0x62313153, 0x2a15153f, 0x0804040c, 0x95c7c752, 0x46232365, 0x9dc3c35e, 0x30181828, 0x379696a1, 0x0a05050f, 0x2f9a9ab5, 0x0e070709, 0x24121236, 0x1b80809b, 0xdfe2e23d, 0xcdebeb26, 0x4e272769, 0x7fb2b2cd, 0xea75759f, 0x1209091b, 0x1d83839e, 0x582c2c74, 0x341a1a2e, 0x361b1b2d, 0xdc6e6eb2, 0xb45a5aee, 0x5ba0a0fb, 0xa45252f6, 0x763b3b4d, 0xb7d6d661, 0x7db3b3ce, 0x5229297b, 0xdde3e33e, 0x5e2f2f71, 0x13848497, 0xa65353f5, 0xb9d1d168, 0x00000000, 0xc1eded2c, 0x40202060, 0xe3fcfc1f, 0x79b1b1c8, 0xb65b5bed, 0xd46a6abe, 0x8dcbcb46, 0x67bebed9, 0x7239394b, 0x944a4ade, 0x984c4cd4, 0xb05858e8, 0x85cfcf4a, 0xbbd0d06b, 0xc5efef2a, 0x4faaaae5, 0xedfbfb16, 0x864343c5, 0x9a4d4dd7, 0x66333355, 0x11858594, 0x8a4545cf, 0xe9f9f910, 0x04020206, 0xfe7f7f81, 0xa05050f0, 0x783c3c44, 0x259f9fba, 0x4ba8a8e3, 0xa25151f3, 0x5da3a3fe, 0x804040c0, 0x058f8f8a, 0x3f9292ad, 0x219d9dbc, 0x70383848, 0xf1f5f504, 0x63bcbcdf, 0x77b6b6c1, 0xafdada75, 0x42212163, 0x20101030, 0xe5ffff1a, 0xfdf3f30e, 0xbfd2d26d, 0x81cdcd4c, 0x180c0c14, 0x26131335, 0xc3ecec2f, 0xbe5f5fe1, 0x359797a2, 0x884444cc, 0x2e171739, 0x93c4c457, 0x55a7a7f2, 0xfc7e7e82, 0x7a3d3d47, 0xc86464ac, 0xba5d5de7, 0x3219192b, 0xe6737395, 0xc06060a0, 0x19818198, 0x9e4f4fd1, 0xa3dcdc7f, 0x44222266, 0x542a2a7e, 0x3b9090ab, 0x0b888883, 0x8c4646ca, 0xc7eeee29, 0x6bb8b8d3, 0x2814143c, 0xa7dede79, 0xbc5e5ee2, 0x160b0b1d, 0xaddbdb76, 0xdbe0e03b, 0x64323256, 0x743a3a4e, 0x140a0a1e, 0x924949db, 0x0c06060a, 0x4824246c, 0xb85c5ce4, 0x9fc2c25d, 0xbdd3d36e, 0x43acacef, 0xc46262a6, 0x399191a8, 0x319595a4, 0xd3e4e437, 0xf279798b, 0xd5e7e732, 0x8bc8c843, 0x6e373759, 0xda6d6db7, 0x018d8d8c, 0xb1d5d564, 0x9c4e4ed2, 0x49a9a9e0, 0xd86c6cb4, 0xac5656fa, 0xf3f4f407, 0xcfeaea25, 0xca6565af, 0xf47a7a8e, 0x47aeaee9, 0x10080818, 0x6fbabad5, 0xf0787888, 0x4a25256f, 0x5c2e2e72, 0x381c1c24, 0x57a6a6f1, 0x73b4b4c7, 0x97c6c651, 0xcbe8e823, 0xa1dddd7c, 0xe874749c, 0x3e1f1f21, 0x964b4bdd, 0x61bdbddc, 0x0d8b8b86, 0x0f8a8a85, 0xe0707090, 0x7c3e3e42, 0x71b5b5c4, 0xcc6666aa, 0x904848d8, 0x06030305, 0xf7f6f601, 0x1c0e0e12, 0xc26161a3, 0x6a35355f, 0xae5757f9, 0x69b9b9d0, 0x17868691, 0x99c1c158, 0x3a1d1d27, 0x279e9eb9, 0xd9e1e138, 0xebf8f813, 0x2b9898b3, 0x22111133, 0xd26969bb, 0xa9d9d970, 0x078e8e89, 0x339494a7, 0x2d9b9bb6, 0x3c1e1e22, 0x15878792, 0xc9e9e920, 0x87cece49, 0xaa5555ff, 0x50282878, 0xa5dfdf7a, 0x038c8c8f, 0x59a1a1f8, 0x09898980, 0x1a0d0d17, 0x65bfbfda, 0xd7e6e631, 0x844242c6, 0xd06868b8, 0x824141c3, 0x299999b0, 0x5a2d2d77, 0x1e0f0f11, 0x7bb0b0cb, 0xa85454fc, 0x6dbbbbd6, 0x2c16163a ]
+    T2 = [ 0xa5c66363, 0x84f87c7c, 0x99ee7777, 0x8df67b7b, 0x0dfff2f2, 0xbdd66b6b, 0xb1de6f6f, 0x5491c5c5, 0x50603030, 0x03020101, 0xa9ce6767, 0x7d562b2b, 0x19e7fefe, 0x62b5d7d7, 0xe64dabab, 0x9aec7676, 0x458fcaca, 0x9d1f8282, 0x4089c9c9, 0x87fa7d7d, 0x15effafa, 0xebb25959, 0xc98e4747, 0x0bfbf0f0, 0xec41adad, 0x67b3d4d4, 0xfd5fa2a2, 0xea45afaf, 0xbf239c9c, 0xf753a4a4, 0x96e47272, 0x5b9bc0c0, 0xc275b7b7, 0x1ce1fdfd, 0xae3d9393, 0x6a4c2626, 0x5a6c3636, 0x417e3f3f, 0x02f5f7f7, 0x4f83cccc, 0x5c683434, 0xf451a5a5, 0x34d1e5e5, 0x08f9f1f1, 0x93e27171, 0x73abd8d8, 0x53623131, 0x3f2a1515, 0x0c080404, 0x5295c7c7, 0x65462323, 0x5e9dc3c3, 0x28301818, 0xa1379696, 0x0f0a0505, 0xb52f9a9a, 0x090e0707, 0x36241212, 0x9b1b8080, 0x3ddfe2e2, 0x26cdebeb, 0x694e2727, 0xcd7fb2b2, 0x9fea7575, 0x1b120909, 0x9e1d8383, 0x74582c2c, 0x2e341a1a, 0x2d361b1b, 0xb2dc6e6e, 0xeeb45a5a, 0xfb5ba0a0, 0xf6a45252, 0x4d763b3b, 0x61b7d6d6, 0xce7db3b3, 0x7b522929, 0x3edde3e3, 0x715e2f2f, 0x97138484, 0xf5a65353, 0x68b9d1d1, 0x00000000, 0x2cc1eded, 0x60402020, 0x1fe3fcfc, 0xc879b1b1, 0xedb65b5b, 0xbed46a6a, 0x468dcbcb, 0xd967bebe, 0x4b723939, 0xde944a4a, 0xd4984c4c, 0xe8b05858, 0x4a85cfcf, 0x6bbbd0d0, 0x2ac5efef, 0xe54faaaa, 0x16edfbfb, 0xc5864343, 0xd79a4d4d, 0x55663333, 0x94118585, 0xcf8a4545, 0x10e9f9f9, 0x06040202, 0x81fe7f7f, 0xf0a05050, 0x44783c3c, 0xba259f9f, 0xe34ba8a8, 0xf3a25151, 0xfe5da3a3, 0xc0804040, 0x8a058f8f, 0xad3f9292, 0xbc219d9d, 0x48703838, 0x04f1f5f5, 0xdf63bcbc, 0xc177b6b6, 0x75afdada, 0x63422121, 0x30201010, 0x1ae5ffff, 0x0efdf3f3, 0x6dbfd2d2, 0x4c81cdcd, 0x14180c0c, 0x35261313, 0x2fc3ecec, 0xe1be5f5f, 0xa2359797, 0xcc884444, 0x392e1717, 0x5793c4c4, 0xf255a7a7, 0x82fc7e7e, 0x477a3d3d, 0xacc86464, 0xe7ba5d5d, 0x2b321919, 0x95e67373, 0xa0c06060, 0x98198181, 0xd19e4f4f, 0x7fa3dcdc, 0x66442222, 0x7e542a2a, 0xab3b9090, 0x830b8888, 0xca8c4646, 0x29c7eeee, 0xd36bb8b8, 0x3c281414, 0x79a7dede, 0xe2bc5e5e, 0x1d160b0b, 0x76addbdb, 0x3bdbe0e0, 0x56643232, 0x4e743a3a, 0x1e140a0a, 0xdb924949, 0x0a0c0606, 0x6c482424, 0xe4b85c5c, 0x5d9fc2c2, 0x6ebdd3d3, 0xef43acac, 0xa6c46262, 0xa8399191, 0xa4319595, 0x37d3e4e4, 0x8bf27979, 0x32d5e7e7, 0x438bc8c8, 0x596e3737, 0xb7da6d6d, 0x8c018d8d, 0x64b1d5d5, 0xd29c4e4e, 0xe049a9a9, 0xb4d86c6c, 0xfaac5656, 0x07f3f4f4, 0x25cfeaea, 0xafca6565, 0x8ef47a7a, 0xe947aeae, 0x18100808, 0xd56fbaba, 0x88f07878, 0x6f4a2525, 0x725c2e2e, 0x24381c1c, 0xf157a6a6, 0xc773b4b4, 0x5197c6c6, 0x23cbe8e8, 0x7ca1dddd, 0x9ce87474, 0x213e1f1f, 0xdd964b4b, 0xdc61bdbd, 0x860d8b8b, 0x850f8a8a, 0x90e07070, 0x427c3e3e, 0xc471b5b5, 0xaacc6666, 0xd8904848, 0x05060303, 0x01f7f6f6, 0x121c0e0e, 0xa3c26161, 0x5f6a3535, 0xf9ae5757, 0xd069b9b9, 0x91178686, 0x5899c1c1, 0x273a1d1d, 0xb9279e9e, 0x38d9e1e1, 0x13ebf8f8, 0xb32b9898, 0x33221111, 0xbbd26969, 0x70a9d9d9, 0x89078e8e, 0xa7339494, 0xb62d9b9b, 0x223c1e1e, 0x92158787, 0x20c9e9e9, 0x4987cece, 0xffaa5555, 0x78502828, 0x7aa5dfdf, 0x8f038c8c, 0xf859a1a1, 0x80098989, 0x171a0d0d, 0xda65bfbf, 0x31d7e6e6, 0xc6844242, 0xb8d06868, 0xc3824141, 0xb0299999, 0x775a2d2d, 0x111e0f0f, 0xcb7bb0b0, 0xfca85454, 0xd66dbbbb, 0x3a2c1616 ]
+    T3 = [ 0x63a5c663, 0x7c84f87c, 0x7799ee77, 0x7b8df67b, 0xf20dfff2, 0x6bbdd66b, 0x6fb1de6f, 0xc55491c5, 0x30506030, 0x01030201, 0x67a9ce67, 0x2b7d562b, 0xfe19e7fe, 0xd762b5d7, 0xabe64dab, 0x769aec76, 0xca458fca, 0x829d1f82, 0xc94089c9, 0x7d87fa7d, 0xfa15effa, 0x59ebb259, 0x47c98e47, 0xf00bfbf0, 0xadec41ad, 0xd467b3d4, 0xa2fd5fa2, 0xafea45af, 0x9cbf239c, 0xa4f753a4, 0x7296e472, 0xc05b9bc0, 0xb7c275b7, 0xfd1ce1fd, 0x93ae3d93, 0x266a4c26, 0x365a6c36, 0x3f417e3f, 0xf702f5f7, 0xcc4f83cc, 0x345c6834, 0xa5f451a5, 0xe534d1e5, 0xf108f9f1, 0x7193e271, 0xd873abd8, 0x31536231, 0x153f2a15, 0x040c0804, 0xc75295c7, 0x23654623, 0xc35e9dc3, 0x18283018, 0x96a13796, 0x050f0a05, 0x9ab52f9a, 0x07090e07, 0x12362412, 0x809b1b80, 0xe23ddfe2, 0xeb26cdeb, 0x27694e27, 0xb2cd7fb2, 0x759fea75, 0x091b1209, 0x839e1d83, 0x2c74582c, 0x1a2e341a, 0x1b2d361b, 0x6eb2dc6e, 0x5aeeb45a, 0xa0fb5ba0, 0x52f6a452, 0x3b4d763b, 0xd661b7d6, 0xb3ce7db3, 0x297b5229, 0xe33edde3, 0x2f715e2f, 0x84971384, 0x53f5a653, 0xd168b9d1, 0x00000000, 0xed2cc1ed, 0x20604020, 0xfc1fe3fc, 0xb1c879b1, 0x5bedb65b, 0x6abed46a, 0xcb468dcb, 0xbed967be, 0x394b7239, 0x4ade944a, 0x4cd4984c, 0x58e8b058, 0xcf4a85cf, 0xd06bbbd0, 0xef2ac5ef, 0xaae54faa, 0xfb16edfb, 0x43c58643, 0x4dd79a4d, 0x33556633, 0x85941185, 0x45cf8a45, 0xf910e9f9, 0x02060402, 0x7f81fe7f, 0x50f0a050, 0x3c44783c, 0x9fba259f, 0xa8e34ba8, 0x51f3a251, 0xa3fe5da3, 0x40c08040, 0x8f8a058f, 0x92ad3f92, 0x9dbc219d, 0x38487038, 0xf504f1f5, 0xbcdf63bc, 0xb6c177b6, 0xda75afda, 0x21634221, 0x10302010, 0xff1ae5ff, 0xf30efdf3, 0xd26dbfd2, 0xcd4c81cd, 0x0c14180c, 0x13352613, 0xec2fc3ec, 0x5fe1be5f, 0x97a23597, 0x44cc8844, 0x17392e17, 0xc45793c4, 0xa7f255a7, 0x7e82fc7e, 0x3d477a3d, 0x64acc864, 0x5de7ba5d, 0x192b3219, 0x7395e673, 0x60a0c060, 0x81981981, 0x4fd19e4f, 0xdc7fa3dc, 0x22664422, 0x2a7e542a, 0x90ab3b90, 0x88830b88, 0x46ca8c46, 0xee29c7ee, 0xb8d36bb8, 0x143c2814, 0xde79a7de, 0x5ee2bc5e, 0x0b1d160b, 0xdb76addb, 0xe03bdbe0, 0x32566432, 0x3a4e743a, 0x0a1e140a, 0x49db9249, 0x060a0c06, 0x246c4824, 0x5ce4b85c, 0xc25d9fc2, 0xd36ebdd3, 0xacef43ac, 0x62a6c462, 0x91a83991, 0x95a43195, 0xe437d3e4, 0x798bf279, 0xe732d5e7, 0xc8438bc8, 0x37596e37, 0x6db7da6d, 0x8d8c018d, 0xd564b1d5, 0x4ed29c4e, 0xa9e049a9, 0x6cb4d86c, 0x56faac56, 0xf407f3f4, 0xea25cfea, 0x65afca65, 0x7a8ef47a, 0xaee947ae, 0x08181008, 0xbad56fba, 0x7888f078, 0x256f4a25, 0x2e725c2e, 0x1c24381c, 0xa6f157a6, 0xb4c773b4, 0xc65197c6, 0xe823cbe8, 0xdd7ca1dd, 0x749ce874, 0x1f213e1f, 0x4bdd964b, 0xbddc61bd, 0x8b860d8b, 0x8a850f8a, 0x7090e070, 0x3e427c3e, 0xb5c471b5, 0x66aacc66, 0x48d89048, 0x03050603, 0xf601f7f6, 0x0e121c0e, 0x61a3c261, 0x355f6a35, 0x57f9ae57, 0xb9d069b9, 0x86911786, 0xc15899c1, 0x1d273a1d, 0x9eb9279e, 0xe138d9e1, 0xf813ebf8, 0x98b32b98, 0x11332211, 0x69bbd269, 0xd970a9d9, 0x8e89078e, 0x94a73394, 0x9bb62d9b, 0x1e223c1e, 0x87921587, 0xe920c9e9, 0xce4987ce, 0x55ffaa55, 0x28785028, 0xdf7aa5df, 0x8c8f038c, 0xa1f859a1, 0x89800989, 0x0d171a0d, 0xbfda65bf, 0xe631d7e6, 0x42c68442, 0x68b8d068, 0x41c38241, 0x99b02999, 0x2d775a2d, 0x0f111e0f, 0xb0cb7bb0, 0x54fca854, 0xbbd66dbb, 0x163a2c16 ]
+    T4 = [ 0x6363a5c6, 0x7c7c84f8, 0x777799ee, 0x7b7b8df6, 0xf2f20dff, 0x6b6bbdd6, 0x6f6fb1de, 0xc5c55491, 0x30305060, 0x01010302, 0x6767a9ce, 0x2b2b7d56, 0xfefe19e7, 0xd7d762b5, 0xababe64d, 0x76769aec, 0xcaca458f, 0x82829d1f, 0xc9c94089, 0x7d7d87fa, 0xfafa15ef, 0x5959ebb2, 0x4747c98e, 0xf0f00bfb, 0xadadec41, 0xd4d467b3, 0xa2a2fd5f, 0xafafea45, 0x9c9cbf23, 0xa4a4f753, 0x727296e4, 0xc0c05b9b, 0xb7b7c275, 0xfdfd1ce1, 0x9393ae3d, 0x26266a4c, 0x36365a6c, 0x3f3f417e, 0xf7f702f5, 0xcccc4f83, 0x34345c68, 0xa5a5f451, 0xe5e534d1, 0xf1f108f9, 0x717193e2, 0xd8d873ab, 0x31315362, 0x15153f2a, 0x04040c08, 0xc7c75295, 0x23236546, 0xc3c35e9d, 0x18182830, 0x9696a137, 0x05050f0a, 0x9a9ab52f, 0x0707090e, 0x12123624, 0x80809b1b, 0xe2e23ddf, 0xebeb26cd, 0x2727694e, 0xb2b2cd7f, 0x75759fea, 0x09091b12, 0x83839e1d, 0x2c2c7458, 0x1a1a2e34, 0x1b1b2d36, 0x6e6eb2dc, 0x5a5aeeb4, 0xa0a0fb5b, 0x5252f6a4, 0x3b3b4d76, 0xd6d661b7, 0xb3b3ce7d, 0x29297b52, 0xe3e33edd, 0x2f2f715e, 0x84849713, 0x5353f5a6, 0xd1d168b9, 0x00000000, 0xeded2cc1, 0x20206040, 0xfcfc1fe3, 0xb1b1c879, 0x5b5bedb6, 0x6a6abed4, 0xcbcb468d, 0xbebed967, 0x39394b72, 0x4a4ade94, 0x4c4cd498, 0x5858e8b0, 0xcfcf4a85, 0xd0d06bbb, 0xefef2ac5, 0xaaaae54f, 0xfbfb16ed, 0x4343c586, 0x4d4dd79a, 0x33335566, 0x85859411, 0x4545cf8a, 0xf9f910e9, 0x02020604, 0x7f7f81fe, 0x5050f0a0, 0x3c3c4478, 0x9f9fba25, 0xa8a8e34b, 0x5151f3a2, 0xa3a3fe5d, 0x4040c080, 0x8f8f8a05, 0x9292ad3f, 0x9d9dbc21, 0x38384870, 0xf5f504f1, 0xbcbcdf63, 0xb6b6c177, 0xdada75af, 0x21216342, 0x10103020, 0xffff1ae5, 0xf3f30efd, 0xd2d26dbf, 0xcdcd4c81, 0x0c0c1418, 0x13133526, 0xecec2fc3, 0x5f5fe1be, 0x9797a235, 0x4444cc88, 0x1717392e, 0xc4c45793, 0xa7a7f255, 0x7e7e82fc, 0x3d3d477a, 0x6464acc8, 0x5d5de7ba, 0x19192b32, 0x737395e6, 0x6060a0c0, 0x81819819, 0x4f4fd19e, 0xdcdc7fa3, 0x22226644, 0x2a2a7e54, 0x9090ab3b, 0x8888830b, 0x4646ca8c, 0xeeee29c7, 0xb8b8d36b, 0x14143c28, 0xdede79a7, 0x5e5ee2bc, 0x0b0b1d16, 0xdbdb76ad, 0xe0e03bdb, 0x32325664, 0x3a3a4e74, 0x0a0a1e14, 0x4949db92, 0x06060a0c, 0x24246c48, 0x5c5ce4b8, 0xc2c25d9f, 0xd3d36ebd, 0xacacef43, 0x6262a6c4, 0x9191a839, 0x9595a431, 0xe4e437d3, 0x79798bf2, 0xe7e732d5, 0xc8c8438b, 0x3737596e, 0x6d6db7da, 0x8d8d8c01, 0xd5d564b1, 0x4e4ed29c, 0xa9a9e049, 0x6c6cb4d8, 0x5656faac, 0xf4f407f3, 0xeaea25cf, 0x6565afca, 0x7a7a8ef4, 0xaeaee947, 0x08081810, 0xbabad56f, 0x787888f0, 0x25256f4a, 0x2e2e725c, 0x1c1c2438, 0xa6a6f157, 0xb4b4c773, 0xc6c65197, 0xe8e823cb, 0xdddd7ca1, 0x74749ce8, 0x1f1f213e, 0x4b4bdd96, 0xbdbddc61, 0x8b8b860d, 0x8a8a850f, 0x707090e0, 0x3e3e427c, 0xb5b5c471, 0x6666aacc, 0x4848d890, 0x03030506, 0xf6f601f7, 0x0e0e121c, 0x6161a3c2, 0x35355f6a, 0x5757f9ae, 0xb9b9d069, 0x86869117, 0xc1c15899, 0x1d1d273a, 0x9e9eb927, 0xe1e138d9, 0xf8f813eb, 0x9898b32b, 0x11113322, 0x6969bbd2, 0xd9d970a9, 0x8e8e8907, 0x9494a733, 0x9b9bb62d, 0x1e1e223c, 0x87879215, 0xe9e920c9, 0xcece4987, 0x5555ffaa, 0x28287850, 0xdfdf7aa5, 0x8c8c8f03, 0xa1a1f859, 0x89898009, 0x0d0d171a, 0xbfbfda65, 0xe6e631d7, 0x4242c684, 0x6868b8d0, 0x4141c382, 0x9999b029, 0x2d2d775a, 0x0f0f111e, 0xb0b0cb7b, 0x5454fca8, 0xbbbbd66d, 0x16163a2c ]
+
+    # Transformations for decryption
+    T5 = [ 0x51f4a750, 0x7e416553, 0x1a17a4c3, 0x3a275e96, 0x3bab6bcb, 0x1f9d45f1, 0xacfa58ab, 0x4be30393, 0x2030fa55, 0xad766df6, 0x88cc7691, 0xf5024c25, 0x4fe5d7fc, 0xc52acbd7, 0x26354480, 0xb562a38f, 0xdeb15a49, 0x25ba1b67, 0x45ea0e98, 0x5dfec0e1, 0xc32f7502, 0x814cf012, 0x8d4697a3, 0x6bd3f9c6, 0x038f5fe7, 0x15929c95, 0xbf6d7aeb, 0x955259da, 0xd4be832d, 0x587421d3, 0x49e06929, 0x8ec9c844, 0x75c2896a, 0xf48e7978, 0x99583e6b, 0x27b971dd, 0xbee14fb6, 0xf088ad17, 0xc920ac66, 0x7dce3ab4, 0x63df4a18, 0xe51a3182, 0x97513360, 0x62537f45, 0xb16477e0, 0xbb6bae84, 0xfe81a01c, 0xf9082b94, 0x70486858, 0x8f45fd19, 0x94de6c87, 0x527bf8b7, 0xab73d323, 0x724b02e2, 0xe31f8f57, 0x6655ab2a, 0xb2eb2807, 0x2fb5c203, 0x86c57b9a, 0xd33708a5, 0x302887f2, 0x23bfa5b2, 0x02036aba, 0xed16825c, 0x8acf1c2b, 0xa779b492, 0xf307f2f0, 0x4e69e2a1, 0x65daf4cd, 0x0605bed5, 0xd134621f, 0xc4a6fe8a, 0x342e539d, 0xa2f355a0, 0x058ae132, 0xa4f6eb75, 0x0b83ec39, 0x4060efaa, 0x5e719f06, 0xbd6e1051, 0x3e218af9, 0x96dd063d, 0xdd3e05ae, 0x4de6bd46, 0x91548db5, 0x71c45d05, 0x0406d46f, 0x605015ff, 0x1998fb24, 0xd6bde997, 0x894043cc, 0x67d99e77, 0xb0e842bd, 0x07898b88, 0xe7195b38, 0x79c8eedb, 0xa17c0a47, 0x7c420fe9, 0xf8841ec9, 0x00000000, 0x09808683, 0x322bed48, 0x1e1170ac, 0x6c5a724e, 0xfd0efffb, 0x0f853856, 0x3daed51e, 0x362d3927, 0x0a0fd964, 0x685ca621, 0x9b5b54d1, 0x24362e3a, 0x0c0a67b1, 0x9357e70f, 0xb4ee96d2, 0x1b9b919e, 0x80c0c54f, 0x61dc20a2, 0x5a774b69, 0x1c121a16, 0xe293ba0a, 0xc0a02ae5, 0x3c22e043, 0x121b171d, 0x0e090d0b, 0xf28bc7ad, 0x2db6a8b9, 0x141ea9c8, 0x57f11985, 0xaf75074c, 0xee99ddbb, 0xa37f60fd, 0xf701269f, 0x5c72f5bc, 0x44663bc5, 0x5bfb7e34, 0x8b432976, 0xcb23c6dc, 0xb6edfc68, 0xb8e4f163, 0xd731dcca, 0x42638510, 0x13972240, 0x84c61120, 0x854a247d, 0xd2bb3df8, 0xaef93211, 0xc729a16d, 0x1d9e2f4b, 0xdcb230f3, 0x0d8652ec, 0x77c1e3d0, 0x2bb3166c, 0xa970b999, 0x119448fa, 0x47e96422, 0xa8fc8cc4, 0xa0f03f1a, 0x567d2cd8, 0x223390ef, 0x87494ec7, 0xd938d1c1, 0x8ccaa2fe, 0x98d40b36, 0xa6f581cf, 0xa57ade28, 0xdab78e26, 0x3fadbfa4, 0x2c3a9de4, 0x5078920d, 0x6a5fcc9b, 0x547e4662, 0xf68d13c2, 0x90d8b8e8, 0x2e39f75e, 0x82c3aff5, 0x9f5d80be, 0x69d0937c, 0x6fd52da9, 0xcf2512b3, 0xc8ac993b, 0x10187da7, 0xe89c636e, 0xdb3bbb7b, 0xcd267809, 0x6e5918f4, 0xec9ab701, 0x834f9aa8, 0xe6956e65, 0xaaffe67e, 0x21bccf08, 0xef15e8e6, 0xbae79bd9, 0x4a6f36ce, 0xea9f09d4, 0x29b07cd6, 0x31a4b2af, 0x2a3f2331, 0xc6a59430, 0x35a266c0, 0x744ebc37, 0xfc82caa6, 0xe090d0b0, 0x33a7d815, 0xf104984a, 0x41ecdaf7, 0x7fcd500e, 0x1791f62f, 0x764dd68d, 0x43efb04d, 0xccaa4d54, 0xe49604df, 0x9ed1b5e3, 0x4c6a881b, 0xc12c1fb8, 0x4665517f, 0x9d5eea04, 0x018c355d, 0xfa877473, 0xfb0b412e, 0xb3671d5a, 0x92dbd252, 0xe9105633, 0x6dd64713, 0x9ad7618c, 0x37a10c7a, 0x59f8148e, 0xeb133c89, 0xcea927ee, 0xb761c935, 0xe11ce5ed, 0x7a47b13c, 0x9cd2df59, 0x55f2733f, 0x1814ce79, 0x73c737bf, 0x53f7cdea, 0x5ffdaa5b, 0xdf3d6f14, 0x7844db86, 0xcaaff381, 0xb968c43e, 0x3824342c, 0xc2a3405f, 0x161dc372, 0xbce2250c, 0x283c498b, 0xff0d9541, 0x39a80171, 0x080cb3de, 0xd8b4e49c, 0x6456c190, 0x7bcb8461, 0xd532b670, 0x486c5c74, 0xd0b85742 ]
+    T6 = [ 0x5051f4a7, 0x537e4165, 0xc31a17a4, 0x963a275e, 0xcb3bab6b, 0xf11f9d45, 0xabacfa58, 0x934be303, 0x552030fa, 0xf6ad766d, 0x9188cc76, 0x25f5024c, 0xfc4fe5d7, 0xd7c52acb, 0x80263544, 0x8fb562a3, 0x49deb15a, 0x6725ba1b, 0x9845ea0e, 0xe15dfec0, 0x02c32f75, 0x12814cf0, 0xa38d4697, 0xc66bd3f9, 0xe7038f5f, 0x9515929c, 0xebbf6d7a, 0xda955259, 0x2dd4be83, 0xd3587421, 0x2949e069, 0x448ec9c8, 0x6a75c289, 0x78f48e79, 0x6b99583e, 0xdd27b971, 0xb6bee14f, 0x17f088ad, 0x66c920ac, 0xb47dce3a, 0x1863df4a, 0x82e51a31, 0x60975133, 0x4562537f, 0xe0b16477, 0x84bb6bae, 0x1cfe81a0, 0x94f9082b, 0x58704868, 0x198f45fd, 0x8794de6c, 0xb7527bf8, 0x23ab73d3, 0xe2724b02, 0x57e31f8f, 0x2a6655ab, 0x07b2eb28, 0x032fb5c2, 0x9a86c57b, 0xa5d33708, 0xf2302887, 0xb223bfa5, 0xba02036a, 0x5ced1682, 0x2b8acf1c, 0x92a779b4, 0xf0f307f2, 0xa14e69e2, 0xcd65daf4, 0xd50605be, 0x1fd13462, 0x8ac4a6fe, 0x9d342e53, 0xa0a2f355, 0x32058ae1, 0x75a4f6eb, 0x390b83ec, 0xaa4060ef, 0x065e719f, 0x51bd6e10, 0xf93e218a, 0x3d96dd06, 0xaedd3e05, 0x464de6bd, 0xb591548d, 0x0571c45d, 0x6f0406d4, 0xff605015, 0x241998fb, 0x97d6bde9, 0xcc894043, 0x7767d99e, 0xbdb0e842, 0x8807898b, 0x38e7195b, 0xdb79c8ee, 0x47a17c0a, 0xe97c420f, 0xc9f8841e, 0x00000000, 0x83098086, 0x48322bed, 0xac1e1170, 0x4e6c5a72, 0xfbfd0eff, 0x560f8538, 0x1e3daed5, 0x27362d39, 0x640a0fd9, 0x21685ca6, 0xd19b5b54, 0x3a24362e, 0xb10c0a67, 0x0f9357e7, 0xd2b4ee96, 0x9e1b9b91, 0x4f80c0c5, 0xa261dc20, 0x695a774b, 0x161c121a, 0x0ae293ba, 0xe5c0a02a, 0x433c22e0, 0x1d121b17, 0x0b0e090d, 0xadf28bc7, 0xb92db6a8, 0xc8141ea9, 0x8557f119, 0x4caf7507, 0xbbee99dd, 0xfda37f60, 0x9ff70126, 0xbc5c72f5, 0xc544663b, 0x345bfb7e, 0x768b4329, 0xdccb23c6, 0x68b6edfc, 0x63b8e4f1, 0xcad731dc, 0x10426385, 0x40139722, 0x2084c611, 0x7d854a24, 0xf8d2bb3d, 0x11aef932, 0x6dc729a1, 0x4b1d9e2f, 0xf3dcb230, 0xec0d8652, 0xd077c1e3, 0x6c2bb316, 0x99a970b9, 0xfa119448, 0x2247e964, 0xc4a8fc8c, 0x1aa0f03f, 0xd8567d2c, 0xef223390, 0xc787494e, 0xc1d938d1, 0xfe8ccaa2, 0x3698d40b, 0xcfa6f581, 0x28a57ade, 0x26dab78e, 0xa43fadbf, 0xe42c3a9d, 0x0d507892, 0x9b6a5fcc, 0x62547e46, 0xc2f68d13, 0xe890d8b8, 0x5e2e39f7, 0xf582c3af, 0xbe9f5d80, 0x7c69d093, 0xa96fd52d, 0xb3cf2512, 0x3bc8ac99, 0xa710187d, 0x6ee89c63, 0x7bdb3bbb, 0x09cd2678, 0xf46e5918, 0x01ec9ab7, 0xa8834f9a, 0x65e6956e, 0x7eaaffe6, 0x0821bccf, 0xe6ef15e8, 0xd9bae79b, 0xce4a6f36, 0xd4ea9f09, 0xd629b07c, 0xaf31a4b2, 0x312a3f23, 0x30c6a594, 0xc035a266, 0x37744ebc, 0xa6fc82ca, 0xb0e090d0, 0x1533a7d8, 0x4af10498, 0xf741ecda, 0x0e7fcd50, 0x2f1791f6, 0x8d764dd6, 0x4d43efb0, 0x54ccaa4d, 0xdfe49604, 0xe39ed1b5, 0x1b4c6a88, 0xb8c12c1f, 0x7f466551, 0x049d5eea, 0x5d018c35, 0x73fa8774, 0x2efb0b41, 0x5ab3671d, 0x5292dbd2, 0x33e91056, 0x136dd647, 0x8c9ad761, 0x7a37a10c, 0x8e59f814, 0x89eb133c, 0xeecea927, 0x35b761c9, 0xede11ce5, 0x3c7a47b1, 0x599cd2df, 0x3f55f273, 0x791814ce, 0xbf73c737, 0xea53f7cd, 0x5b5ffdaa, 0x14df3d6f, 0x867844db, 0x81caaff3, 0x3eb968c4, 0x2c382434, 0x5fc2a340, 0x72161dc3, 0x0cbce225, 0x8b283c49, 0x41ff0d95, 0x7139a801, 0xde080cb3, 0x9cd8b4e4, 0x906456c1, 0x617bcb84, 0x70d532b6, 0x74486c5c, 0x42d0b857 ]
+    T7 = [ 0xa75051f4, 0x65537e41, 0xa4c31a17, 0x5e963a27, 0x6bcb3bab, 0x45f11f9d, 0x58abacfa, 0x03934be3, 0xfa552030, 0x6df6ad76, 0x769188cc, 0x4c25f502, 0xd7fc4fe5, 0xcbd7c52a, 0x44802635, 0xa38fb562, 0x5a49deb1, 0x1b6725ba, 0x0e9845ea, 0xc0e15dfe, 0x7502c32f, 0xf012814c, 0x97a38d46, 0xf9c66bd3, 0x5fe7038f, 0x9c951592, 0x7aebbf6d, 0x59da9552, 0x832dd4be, 0x21d35874, 0x692949e0, 0xc8448ec9, 0x896a75c2, 0x7978f48e, 0x3e6b9958, 0x71dd27b9, 0x4fb6bee1, 0xad17f088, 0xac66c920, 0x3ab47dce, 0x4a1863df, 0x3182e51a, 0x33609751, 0x7f456253, 0x77e0b164, 0xae84bb6b, 0xa01cfe81, 0x2b94f908, 0x68587048, 0xfd198f45, 0x6c8794de, 0xf8b7527b, 0xd323ab73, 0x02e2724b, 0x8f57e31f, 0xab2a6655, 0x2807b2eb, 0xc2032fb5, 0x7b9a86c5, 0x08a5d337, 0x87f23028, 0xa5b223bf, 0x6aba0203, 0x825ced16, 0x1c2b8acf, 0xb492a779, 0xf2f0f307, 0xe2a14e69, 0xf4cd65da, 0xbed50605, 0x621fd134, 0xfe8ac4a6, 0x539d342e, 0x55a0a2f3, 0xe132058a, 0xeb75a4f6, 0xec390b83, 0xefaa4060, 0x9f065e71, 0x1051bd6e, 0x8af93e21, 0x063d96dd, 0x05aedd3e, 0xbd464de6, 0x8db59154, 0x5d0571c4, 0xd46f0406, 0x15ff6050, 0xfb241998, 0xe997d6bd, 0x43cc8940, 0x9e7767d9, 0x42bdb0e8, 0x8b880789, 0x5b38e719, 0xeedb79c8, 0x0a47a17c, 0x0fe97c42, 0x1ec9f884, 0x00000000, 0x86830980, 0xed48322b, 0x70ac1e11, 0x724e6c5a, 0xfffbfd0e, 0x38560f85, 0xd51e3dae, 0x3927362d, 0xd9640a0f, 0xa621685c, 0x54d19b5b, 0x2e3a2436, 0x67b10c0a, 0xe70f9357, 0x96d2b4ee, 0x919e1b9b, 0xc54f80c0, 0x20a261dc, 0x4b695a77, 0x1a161c12, 0xba0ae293, 0x2ae5c0a0, 0xe0433c22, 0x171d121b, 0x0d0b0e09, 0xc7adf28b, 0xa8b92db6, 0xa9c8141e, 0x198557f1, 0x074caf75, 0xddbbee99, 0x60fda37f, 0x269ff701, 0xf5bc5c72, 0x3bc54466, 0x7e345bfb, 0x29768b43, 0xc6dccb23, 0xfc68b6ed, 0xf163b8e4, 0xdccad731, 0x85104263, 0x22401397, 0x112084c6, 0x247d854a, 0x3df8d2bb, 0x3211aef9, 0xa16dc729, 0x2f4b1d9e, 0x30f3dcb2, 0x52ec0d86, 0xe3d077c1, 0x166c2bb3, 0xb999a970, 0x48fa1194, 0x642247e9, 0x8cc4a8fc, 0x3f1aa0f0, 0x2cd8567d, 0x90ef2233, 0x4ec78749, 0xd1c1d938, 0xa2fe8cca, 0x0b3698d4, 0x81cfa6f5, 0xde28a57a, 0x8e26dab7, 0xbfa43fad, 0x9de42c3a, 0x920d5078, 0xcc9b6a5f, 0x4662547e, 0x13c2f68d, 0xb8e890d8, 0xf75e2e39, 0xaff582c3, 0x80be9f5d, 0x937c69d0, 0x2da96fd5, 0x12b3cf25, 0x993bc8ac, 0x7da71018, 0x636ee89c, 0xbb7bdb3b, 0x7809cd26, 0x18f46e59, 0xb701ec9a, 0x9aa8834f, 0x6e65e695, 0xe67eaaff, 0xcf0821bc, 0xe8e6ef15, 0x9bd9bae7, 0x36ce4a6f, 0x09d4ea9f, 0x7cd629b0, 0xb2af31a4, 0x23312a3f, 0x9430c6a5, 0x66c035a2, 0xbc37744e, 0xcaa6fc82, 0xd0b0e090, 0xd81533a7, 0x984af104, 0xdaf741ec, 0x500e7fcd, 0xf62f1791, 0xd68d764d, 0xb04d43ef, 0x4d54ccaa, 0x04dfe496, 0xb5e39ed1, 0x881b4c6a, 0x1fb8c12c, 0x517f4665, 0xea049d5e, 0x355d018c, 0x7473fa87, 0x412efb0b, 0x1d5ab367, 0xd25292db, 0x5633e910, 0x47136dd6, 0x618c9ad7, 0x0c7a37a1, 0x148e59f8, 0x3c89eb13, 0x27eecea9, 0xc935b761, 0xe5ede11c, 0xb13c7a47, 0xdf599cd2, 0x733f55f2, 0xce791814, 0x37bf73c7, 0xcdea53f7, 0xaa5b5ffd, 0x6f14df3d, 0xdb867844, 0xf381caaf, 0xc43eb968, 0x342c3824, 0x405fc2a3, 0xc372161d, 0x250cbce2, 0x498b283c, 0x9541ff0d, 0x017139a8, 0xb3de080c, 0xe49cd8b4, 0xc1906456, 0x84617bcb, 0xb670d532, 0x5c74486c, 0x5742d0b8 ]
+    T8 = [ 0xf4a75051, 0x4165537e, 0x17a4c31a, 0x275e963a, 0xab6bcb3b, 0x9d45f11f, 0xfa58abac, 0xe303934b, 0x30fa5520, 0x766df6ad, 0xcc769188, 0x024c25f5, 0xe5d7fc4f, 0x2acbd7c5, 0x35448026, 0x62a38fb5, 0xb15a49de, 0xba1b6725, 0xea0e9845, 0xfec0e15d, 0x2f7502c3, 0x4cf01281, 0x4697a38d, 0xd3f9c66b, 0x8f5fe703, 0x929c9515, 0x6d7aebbf, 0x5259da95, 0xbe832dd4, 0x7421d358, 0xe0692949, 0xc9c8448e, 0xc2896a75, 0x8e7978f4, 0x583e6b99, 0xb971dd27, 0xe14fb6be, 0x88ad17f0, 0x20ac66c9, 0xce3ab47d, 0xdf4a1863, 0x1a3182e5, 0x51336097, 0x537f4562, 0x6477e0b1, 0x6bae84bb, 0x81a01cfe, 0x082b94f9, 0x48685870, 0x45fd198f, 0xde6c8794, 0x7bf8b752, 0x73d323ab, 0x4b02e272, 0x1f8f57e3, 0x55ab2a66, 0xeb2807b2, 0xb5c2032f, 0xc57b9a86, 0x3708a5d3, 0x2887f230, 0xbfa5b223, 0x036aba02, 0x16825ced, 0xcf1c2b8a, 0x79b492a7, 0x07f2f0f3, 0x69e2a14e, 0xdaf4cd65, 0x05bed506, 0x34621fd1, 0xa6fe8ac4, 0x2e539d34, 0xf355a0a2, 0x8ae13205, 0xf6eb75a4, 0x83ec390b, 0x60efaa40, 0x719f065e, 0x6e1051bd, 0x218af93e, 0xdd063d96, 0x3e05aedd, 0xe6bd464d, 0x548db591, 0xc45d0571, 0x06d46f04, 0x5015ff60, 0x98fb2419, 0xbde997d6, 0x4043cc89, 0xd99e7767, 0xe842bdb0, 0x898b8807, 0x195b38e7, 0xc8eedb79, 0x7c0a47a1, 0x420fe97c, 0x841ec9f8, 0x00000000, 0x80868309, 0x2bed4832, 0x1170ac1e, 0x5a724e6c, 0x0efffbfd, 0x8538560f, 0xaed51e3d, 0x2d392736, 0x0fd9640a, 0x5ca62168, 0x5b54d19b, 0x362e3a24, 0x0a67b10c, 0x57e70f93, 0xee96d2b4, 0x9b919e1b, 0xc0c54f80, 0xdc20a261, 0x774b695a, 0x121a161c, 0x93ba0ae2, 0xa02ae5c0, 0x22e0433c, 0x1b171d12, 0x090d0b0e, 0x8bc7adf2, 0xb6a8b92d, 0x1ea9c814, 0xf1198557, 0x75074caf, 0x99ddbbee, 0x7f60fda3, 0x01269ff7, 0x72f5bc5c, 0x663bc544, 0xfb7e345b, 0x4329768b, 0x23c6dccb, 0xedfc68b6, 0xe4f163b8, 0x31dccad7, 0x63851042, 0x97224013, 0xc6112084, 0x4a247d85, 0xbb3df8d2, 0xf93211ae, 0x29a16dc7, 0x9e2f4b1d, 0xb230f3dc, 0x8652ec0d, 0xc1e3d077, 0xb3166c2b, 0x70b999a9, 0x9448fa11, 0xe9642247, 0xfc8cc4a8, 0xf03f1aa0, 0x7d2cd856, 0x3390ef22, 0x494ec787, 0x38d1c1d9, 0xcaa2fe8c, 0xd40b3698, 0xf581cfa6, 0x7ade28a5, 0xb78e26da, 0xadbfa43f, 0x3a9de42c, 0x78920d50, 0x5fcc9b6a, 0x7e466254, 0x8d13c2f6, 0xd8b8e890, 0x39f75e2e, 0xc3aff582, 0x5d80be9f, 0xd0937c69, 0xd52da96f, 0x2512b3cf, 0xac993bc8, 0x187da710, 0x9c636ee8, 0x3bbb7bdb, 0x267809cd, 0x5918f46e, 0x9ab701ec, 0x4f9aa883, 0x956e65e6, 0xffe67eaa, 0xbccf0821, 0x15e8e6ef, 0xe79bd9ba, 0x6f36ce4a, 0x9f09d4ea, 0xb07cd629, 0xa4b2af31, 0x3f23312a, 0xa59430c6, 0xa266c035, 0x4ebc3774, 0x82caa6fc, 0x90d0b0e0, 0xa7d81533, 0x04984af1, 0xecdaf741, 0xcd500e7f, 0x91f62f17, 0x4dd68d76, 0xefb04d43, 0xaa4d54cc, 0x9604dfe4, 0xd1b5e39e, 0x6a881b4c, 0x2c1fb8c1, 0x65517f46, 0x5eea049d, 0x8c355d01, 0x877473fa, 0x0b412efb, 0x671d5ab3, 0xdbd25292, 0x105633e9, 0xd647136d, 0xd7618c9a, 0xa10c7a37, 0xf8148e59, 0x133c89eb, 0xa927eece, 0x61c935b7, 0x1ce5ede1, 0x47b13c7a, 0xd2df599c, 0xf2733f55, 0x14ce7918, 0xc737bf73, 0xf7cdea53, 0xfdaa5b5f, 0x3d6f14df, 0x44db8678, 0xaff381ca, 0x68c43eb9, 0x24342c38, 0xa3405fc2, 0x1dc37216, 0xe2250cbc, 0x3c498b28, 0x0d9541ff, 0xa8017139, 0x0cb3de08, 0xb4e49cd8, 0x56c19064, 0xcb84617b, 0x32b670d5, 0x6c5c7448, 0xb85742d0 ]
+
+    # Transformations for decryption key expansion
+    U1 = [ 0x00000000, 0x0e090d0b, 0x1c121a16, 0x121b171d, 0x3824342c, 0x362d3927, 0x24362e3a, 0x2a3f2331, 0x70486858, 0x7e416553, 0x6c5a724e, 0x62537f45, 0x486c5c74, 0x4665517f, 0x547e4662, 0x5a774b69, 0xe090d0b0, 0xee99ddbb, 0xfc82caa6, 0xf28bc7ad, 0xd8b4e49c, 0xd6bde997, 0xc4a6fe8a, 0xcaaff381, 0x90d8b8e8, 0x9ed1b5e3, 0x8ccaa2fe, 0x82c3aff5, 0xa8fc8cc4, 0xa6f581cf, 0xb4ee96d2, 0xbae79bd9, 0xdb3bbb7b, 0xd532b670, 0xc729a16d, 0xc920ac66, 0xe31f8f57, 0xed16825c, 0xff0d9541, 0xf104984a, 0xab73d323, 0xa57ade28, 0xb761c935, 0xb968c43e, 0x9357e70f, 0x9d5eea04, 0x8f45fd19, 0x814cf012, 0x3bab6bcb, 0x35a266c0, 0x27b971dd, 0x29b07cd6, 0x038f5fe7, 0x0d8652ec, 0x1f9d45f1, 0x119448fa, 0x4be30393, 0x45ea0e98, 0x57f11985, 0x59f8148e, 0x73c737bf, 0x7dce3ab4, 0x6fd52da9, 0x61dc20a2, 0xad766df6, 0xa37f60fd, 0xb16477e0, 0xbf6d7aeb, 0x955259da, 0x9b5b54d1, 0x894043cc, 0x87494ec7, 0xdd3e05ae, 0xd33708a5, 0xc12c1fb8, 0xcf2512b3, 0xe51a3182, 0xeb133c89, 0xf9082b94, 0xf701269f, 0x4de6bd46, 0x43efb04d, 0x51f4a750, 0x5ffdaa5b, 0x75c2896a, 0x7bcb8461, 0x69d0937c, 0x67d99e77, 0x3daed51e, 0x33a7d815, 0x21bccf08, 0x2fb5c203, 0x058ae132, 0x0b83ec39, 0x1998fb24, 0x1791f62f, 0x764dd68d, 0x7844db86, 0x6a5fcc9b, 0x6456c190, 0x4e69e2a1, 0x4060efaa, 0x527bf8b7, 0x5c72f5bc, 0x0605bed5, 0x080cb3de, 0x1a17a4c3, 0x141ea9c8, 0x3e218af9, 0x302887f2, 0x223390ef, 0x2c3a9de4, 0x96dd063d, 0x98d40b36, 0x8acf1c2b, 0x84c61120, 0xaef93211, 0xa0f03f1a, 0xb2eb2807, 0xbce2250c, 0xe6956e65, 0xe89c636e, 0xfa877473, 0xf48e7978, 0xdeb15a49, 0xd0b85742, 0xc2a3405f, 0xccaa4d54, 0x41ecdaf7, 0x4fe5d7fc, 0x5dfec0e1, 0x53f7cdea, 0x79c8eedb, 0x77c1e3d0, 0x65daf4cd, 0x6bd3f9c6, 0x31a4b2af, 0x3fadbfa4, 0x2db6a8b9, 0x23bfa5b2, 0x09808683, 0x07898b88, 0x15929c95, 0x1b9b919e, 0xa17c0a47, 0xaf75074c, 0xbd6e1051, 0xb3671d5a, 0x99583e6b, 0x97513360, 0x854a247d, 0x8b432976, 0xd134621f, 0xdf3d6f14, 0xcd267809, 0xc32f7502, 0xe9105633, 0xe7195b38, 0xf5024c25, 0xfb0b412e, 0x9ad7618c, 0x94de6c87, 0x86c57b9a, 0x88cc7691, 0xa2f355a0, 0xacfa58ab, 0xbee14fb6, 0xb0e842bd, 0xea9f09d4, 0xe49604df, 0xf68d13c2, 0xf8841ec9, 0xd2bb3df8, 0xdcb230f3, 0xcea927ee, 0xc0a02ae5, 0x7a47b13c, 0x744ebc37, 0x6655ab2a, 0x685ca621, 0x42638510, 0x4c6a881b, 0x5e719f06, 0x5078920d, 0x0a0fd964, 0x0406d46f, 0x161dc372, 0x1814ce79, 0x322bed48, 0x3c22e043, 0x2e39f75e, 0x2030fa55, 0xec9ab701, 0xe293ba0a, 0xf088ad17, 0xfe81a01c, 0xd4be832d, 0xdab78e26, 0xc8ac993b, 0xc6a59430, 0x9cd2df59, 0x92dbd252, 0x80c0c54f, 0x8ec9c844, 0xa4f6eb75, 0xaaffe67e, 0xb8e4f163, 0xb6edfc68, 0x0c0a67b1, 0x02036aba, 0x10187da7, 0x1e1170ac, 0x342e539d, 0x3a275e96, 0x283c498b, 0x26354480, 0x7c420fe9, 0x724b02e2, 0x605015ff, 0x6e5918f4, 0x44663bc5, 0x4a6f36ce, 0x587421d3, 0x567d2cd8, 0x37a10c7a, 0x39a80171, 0x2bb3166c, 0x25ba1b67, 0x0f853856, 0x018c355d, 0x13972240, 0x1d9e2f4b, 0x47e96422, 0x49e06929, 0x5bfb7e34, 0x55f2733f, 0x7fcd500e, 0x71c45d05, 0x63df4a18, 0x6dd64713, 0xd731dcca, 0xd938d1c1, 0xcb23c6dc, 0xc52acbd7, 0xef15e8e6, 0xe11ce5ed, 0xf307f2f0, 0xfd0efffb, 0xa779b492, 0xa970b999, 0xbb6bae84, 0xb562a38f, 0x9f5d80be, 0x91548db5, 0x834f9aa8, 0x8d4697a3 ]
+    U2 = [ 0x00000000, 0x0b0e090d, 0x161c121a, 0x1d121b17, 0x2c382434, 0x27362d39, 0x3a24362e, 0x312a3f23, 0x58704868, 0x537e4165, 0x4e6c5a72, 0x4562537f, 0x74486c5c, 0x7f466551, 0x62547e46, 0x695a774b, 0xb0e090d0, 0xbbee99dd, 0xa6fc82ca, 0xadf28bc7, 0x9cd8b4e4, 0x97d6bde9, 0x8ac4a6fe, 0x81caaff3, 0xe890d8b8, 0xe39ed1b5, 0xfe8ccaa2, 0xf582c3af, 0xc4a8fc8c, 0xcfa6f581, 0xd2b4ee96, 0xd9bae79b, 0x7bdb3bbb, 0x70d532b6, 0x6dc729a1, 0x66c920ac, 0x57e31f8f, 0x5ced1682, 0x41ff0d95, 0x4af10498, 0x23ab73d3, 0x28a57ade, 0x35b761c9, 0x3eb968c4, 0x0f9357e7, 0x049d5eea, 0x198f45fd, 0x12814cf0, 0xcb3bab6b, 0xc035a266, 0xdd27b971, 0xd629b07c, 0xe7038f5f, 0xec0d8652, 0xf11f9d45, 0xfa119448, 0x934be303, 0x9845ea0e, 0x8557f119, 0x8e59f814, 0xbf73c737, 0xb47dce3a, 0xa96fd52d, 0xa261dc20, 0xf6ad766d, 0xfda37f60, 0xe0b16477, 0xebbf6d7a, 0xda955259, 0xd19b5b54, 0xcc894043, 0xc787494e, 0xaedd3e05, 0xa5d33708, 0xb8c12c1f, 0xb3cf2512, 0x82e51a31, 0x89eb133c, 0x94f9082b, 0x9ff70126, 0x464de6bd, 0x4d43efb0, 0x5051f4a7, 0x5b5ffdaa, 0x6a75c289, 0x617bcb84, 0x7c69d093, 0x7767d99e, 0x1e3daed5, 0x1533a7d8, 0x0821bccf, 0x032fb5c2, 0x32058ae1, 0x390b83ec, 0x241998fb, 0x2f1791f6, 0x8d764dd6, 0x867844db, 0x9b6a5fcc, 0x906456c1, 0xa14e69e2, 0xaa4060ef, 0xb7527bf8, 0xbc5c72f5, 0xd50605be, 0xde080cb3, 0xc31a17a4, 0xc8141ea9, 0xf93e218a, 0xf2302887, 0xef223390, 0xe42c3a9d, 0x3d96dd06, 0x3698d40b, 0x2b8acf1c, 0x2084c611, 0x11aef932, 0x1aa0f03f, 0x07b2eb28, 0x0cbce225, 0x65e6956e, 0x6ee89c63, 0x73fa8774, 0x78f48e79, 0x49deb15a, 0x42d0b857, 0x5fc2a340, 0x54ccaa4d, 0xf741ecda, 0xfc4fe5d7, 0xe15dfec0, 0xea53f7cd, 0xdb79c8ee, 0xd077c1e3, 0xcd65daf4, 0xc66bd3f9, 0xaf31a4b2, 0xa43fadbf, 0xb92db6a8, 0xb223bfa5, 0x83098086, 0x8807898b, 0x9515929c, 0x9e1b9b91, 0x47a17c0a, 0x4caf7507, 0x51bd6e10, 0x5ab3671d, 0x6b99583e, 0x60975133, 0x7d854a24, 0x768b4329, 0x1fd13462, 0x14df3d6f, 0x09cd2678, 0x02c32f75, 0x33e91056, 0x38e7195b, 0x25f5024c, 0x2efb0b41, 0x8c9ad761, 0x8794de6c, 0x9a86c57b, 0x9188cc76, 0xa0a2f355, 0xabacfa58, 0xb6bee14f, 0xbdb0e842, 0xd4ea9f09, 0xdfe49604, 0xc2f68d13, 0xc9f8841e, 0xf8d2bb3d, 0xf3dcb230, 0xeecea927, 0xe5c0a02a, 0x3c7a47b1, 0x37744ebc, 0x2a6655ab, 0x21685ca6, 0x10426385, 0x1b4c6a88, 0x065e719f, 0x0d507892, 0x640a0fd9, 0x6f0406d4, 0x72161dc3, 0x791814ce, 0x48322bed, 0x433c22e0, 0x5e2e39f7, 0x552030fa, 0x01ec9ab7, 0x0ae293ba, 0x17f088ad, 0x1cfe81a0, 0x2dd4be83, 0x26dab78e, 0x3bc8ac99, 0x30c6a594, 0x599cd2df, 0x5292dbd2, 0x4f80c0c5, 0x448ec9c8, 0x75a4f6eb, 0x7eaaffe6, 0x63b8e4f1, 0x68b6edfc, 0xb10c0a67, 0xba02036a, 0xa710187d, 0xac1e1170, 0x9d342e53, 0x963a275e, 0x8b283c49, 0x80263544, 0xe97c420f, 0xe2724b02, 0xff605015, 0xf46e5918, 0xc544663b, 0xce4a6f36, 0xd3587421, 0xd8567d2c, 0x7a37a10c, 0x7139a801, 0x6c2bb316, 0x6725ba1b, 0x560f8538, 0x5d018c35, 0x40139722, 0x4b1d9e2f, 0x2247e964, 0x2949e069, 0x345bfb7e, 0x3f55f273, 0x0e7fcd50, 0x0571c45d, 0x1863df4a, 0x136dd647, 0xcad731dc, 0xc1d938d1, 0xdccb23c6, 0xd7c52acb, 0xe6ef15e8, 0xede11ce5, 0xf0f307f2, 0xfbfd0eff, 0x92a779b4, 0x99a970b9, 0x84bb6bae, 0x8fb562a3, 0xbe9f5d80, 0xb591548d, 0xa8834f9a, 0xa38d4697 ]
+    U3 = [ 0x00000000, 0x0d0b0e09, 0x1a161c12, 0x171d121b, 0x342c3824, 0x3927362d, 0x2e3a2436, 0x23312a3f, 0x68587048, 0x65537e41, 0x724e6c5a, 0x7f456253, 0x5c74486c, 0x517f4665, 0x4662547e, 0x4b695a77, 0xd0b0e090, 0xddbbee99, 0xcaa6fc82, 0xc7adf28b, 0xe49cd8b4, 0xe997d6bd, 0xfe8ac4a6, 0xf381caaf, 0xb8e890d8, 0xb5e39ed1, 0xa2fe8cca, 0xaff582c3, 0x8cc4a8fc, 0x81cfa6f5, 0x96d2b4ee, 0x9bd9bae7, 0xbb7bdb3b, 0xb670d532, 0xa16dc729, 0xac66c920, 0x8f57e31f, 0x825ced16, 0x9541ff0d, 0x984af104, 0xd323ab73, 0xde28a57a, 0xc935b761, 0xc43eb968, 0xe70f9357, 0xea049d5e, 0xfd198f45, 0xf012814c, 0x6bcb3bab, 0x66c035a2, 0x71dd27b9, 0x7cd629b0, 0x5fe7038f, 0x52ec0d86, 0x45f11f9d, 0x48fa1194, 0x03934be3, 0x0e9845ea, 0x198557f1, 0x148e59f8, 0x37bf73c7, 0x3ab47dce, 0x2da96fd5, 0x20a261dc, 0x6df6ad76, 0x60fda37f, 0x77e0b164, 0x7aebbf6d, 0x59da9552, 0x54d19b5b, 0x43cc8940, 0x4ec78749, 0x05aedd3e, 0x08a5d337, 0x1fb8c12c, 0x12b3cf25, 0x3182e51a, 0x3c89eb13, 0x2b94f908, 0x269ff701, 0xbd464de6, 0xb04d43ef, 0xa75051f4, 0xaa5b5ffd, 0x896a75c2, 0x84617bcb, 0x937c69d0, 0x9e7767d9, 0xd51e3dae, 0xd81533a7, 0xcf0821bc, 0xc2032fb5, 0xe132058a, 0xec390b83, 0xfb241998, 0xf62f1791, 0xd68d764d, 0xdb867844, 0xcc9b6a5f, 0xc1906456, 0xe2a14e69, 0xefaa4060, 0xf8b7527b, 0xf5bc5c72, 0xbed50605, 0xb3de080c, 0xa4c31a17, 0xa9c8141e, 0x8af93e21, 0x87f23028, 0x90ef2233, 0x9de42c3a, 0x063d96dd, 0x0b3698d4, 0x1c2b8acf, 0x112084c6, 0x3211aef9, 0x3f1aa0f0, 0x2807b2eb, 0x250cbce2, 0x6e65e695, 0x636ee89c, 0x7473fa87, 0x7978f48e, 0x5a49deb1, 0x5742d0b8, 0x405fc2a3, 0x4d54ccaa, 0xdaf741ec, 0xd7fc4fe5, 0xc0e15dfe, 0xcdea53f7, 0xeedb79c8, 0xe3d077c1, 0xf4cd65da, 0xf9c66bd3, 0xb2af31a4, 0xbfa43fad, 0xa8b92db6, 0xa5b223bf, 0x86830980, 0x8b880789, 0x9c951592, 0x919e1b9b, 0x0a47a17c, 0x074caf75, 0x1051bd6e, 0x1d5ab367, 0x3e6b9958, 0x33609751, 0x247d854a, 0x29768b43, 0x621fd134, 0x6f14df3d, 0x7809cd26, 0x7502c32f, 0x5633e910, 0x5b38e719, 0x4c25f502, 0x412efb0b, 0x618c9ad7, 0x6c8794de, 0x7b9a86c5, 0x769188cc, 0x55a0a2f3, 0x58abacfa, 0x4fb6bee1, 0x42bdb0e8, 0x09d4ea9f, 0x04dfe496, 0x13c2f68d, 0x1ec9f884, 0x3df8d2bb, 0x30f3dcb2, 0x27eecea9, 0x2ae5c0a0, 0xb13c7a47, 0xbc37744e, 0xab2a6655, 0xa621685c, 0x85104263, 0x881b4c6a, 0x9f065e71, 0x920d5078, 0xd9640a0f, 0xd46f0406, 0xc372161d, 0xce791814, 0xed48322b, 0xe0433c22, 0xf75e2e39, 0xfa552030, 0xb701ec9a, 0xba0ae293, 0xad17f088, 0xa01cfe81, 0x832dd4be, 0x8e26dab7, 0x993bc8ac, 0x9430c6a5, 0xdf599cd2, 0xd25292db, 0xc54f80c0, 0xc8448ec9, 0xeb75a4f6, 0xe67eaaff, 0xf163b8e4, 0xfc68b6ed, 0x67b10c0a, 0x6aba0203, 0x7da71018, 0x70ac1e11, 0x539d342e, 0x5e963a27, 0x498b283c, 0x44802635, 0x0fe97c42, 0x02e2724b, 0x15ff6050, 0x18f46e59, 0x3bc54466, 0x36ce4a6f, 0x21d35874, 0x2cd8567d, 0x0c7a37a1, 0x017139a8, 0x166c2bb3, 0x1b6725ba, 0x38560f85, 0x355d018c, 0x22401397, 0x2f4b1d9e, 0x642247e9, 0x692949e0, 0x7e345bfb, 0x733f55f2, 0x500e7fcd, 0x5d0571c4, 0x4a1863df, 0x47136dd6, 0xdccad731, 0xd1c1d938, 0xc6dccb23, 0xcbd7c52a, 0xe8e6ef15, 0xe5ede11c, 0xf2f0f307, 0xfffbfd0e, 0xb492a779, 0xb999a970, 0xae84bb6b, 0xa38fb562, 0x80be9f5d, 0x8db59154, 0x9aa8834f, 0x97a38d46 ]
+    U4 = [ 0x00000000, 0x090d0b0e, 0x121a161c, 0x1b171d12, 0x24342c38, 0x2d392736, 0x362e3a24, 0x3f23312a, 0x48685870, 0x4165537e, 0x5a724e6c, 0x537f4562, 0x6c5c7448, 0x65517f46, 0x7e466254, 0x774b695a, 0x90d0b0e0, 0x99ddbbee, 0x82caa6fc, 0x8bc7adf2, 0xb4e49cd8, 0xbde997d6, 0xa6fe8ac4, 0xaff381ca, 0xd8b8e890, 0xd1b5e39e, 0xcaa2fe8c, 0xc3aff582, 0xfc8cc4a8, 0xf581cfa6, 0xee96d2b4, 0xe79bd9ba, 0x3bbb7bdb, 0x32b670d5, 0x29a16dc7, 0x20ac66c9, 0x1f8f57e3, 0x16825ced, 0x0d9541ff, 0x04984af1, 0x73d323ab, 0x7ade28a5, 0x61c935b7, 0x68c43eb9, 0x57e70f93, 0x5eea049d, 0x45fd198f, 0x4cf01281, 0xab6bcb3b, 0xa266c035, 0xb971dd27, 0xb07cd629, 0x8f5fe703, 0x8652ec0d, 0x9d45f11f, 0x9448fa11, 0xe303934b, 0xea0e9845, 0xf1198557, 0xf8148e59, 0xc737bf73, 0xce3ab47d, 0xd52da96f, 0xdc20a261, 0x766df6ad, 0x7f60fda3, 0x6477e0b1, 0x6d7aebbf, 0x5259da95, 0x5b54d19b, 0x4043cc89, 0x494ec787, 0x3e05aedd, 0x3708a5d3, 0x2c1fb8c1, 0x2512b3cf, 0x1a3182e5, 0x133c89eb, 0x082b94f9, 0x01269ff7, 0xe6bd464d, 0xefb04d43, 0xf4a75051, 0xfdaa5b5f, 0xc2896a75, 0xcb84617b, 0xd0937c69, 0xd99e7767, 0xaed51e3d, 0xa7d81533, 0xbccf0821, 0xb5c2032f, 0x8ae13205, 0x83ec390b, 0x98fb2419, 0x91f62f17, 0x4dd68d76, 0x44db8678, 0x5fcc9b6a, 0x56c19064, 0x69e2a14e, 0x60efaa40, 0x7bf8b752, 0x72f5bc5c, 0x05bed506, 0x0cb3de08, 0x17a4c31a, 0x1ea9c814, 0x218af93e, 0x2887f230, 0x3390ef22, 0x3a9de42c, 0xdd063d96, 0xd40b3698, 0xcf1c2b8a, 0xc6112084, 0xf93211ae, 0xf03f1aa0, 0xeb2807b2, 0xe2250cbc, 0x956e65e6, 0x9c636ee8, 0x877473fa, 0x8e7978f4, 0xb15a49de, 0xb85742d0, 0xa3405fc2, 0xaa4d54cc, 0xecdaf741, 0xe5d7fc4f, 0xfec0e15d, 0xf7cdea53, 0xc8eedb79, 0xc1e3d077, 0xdaf4cd65, 0xd3f9c66b, 0xa4b2af31, 0xadbfa43f, 0xb6a8b92d, 0xbfa5b223, 0x80868309, 0x898b8807, 0x929c9515, 0x9b919e1b, 0x7c0a47a1, 0x75074caf, 0x6e1051bd, 0x671d5ab3, 0x583e6b99, 0x51336097, 0x4a247d85, 0x4329768b, 0x34621fd1, 0x3d6f14df, 0x267809cd, 0x2f7502c3, 0x105633e9, 0x195b38e7, 0x024c25f5, 0x0b412efb, 0xd7618c9a, 0xde6c8794, 0xc57b9a86, 0xcc769188, 0xf355a0a2, 0xfa58abac, 0xe14fb6be, 0xe842bdb0, 0x9f09d4ea, 0x9604dfe4, 0x8d13c2f6, 0x841ec9f8, 0xbb3df8d2, 0xb230f3dc, 0xa927eece, 0xa02ae5c0, 0x47b13c7a, 0x4ebc3774, 0x55ab2a66, 0x5ca62168, 0x63851042, 0x6a881b4c, 0x719f065e, 0x78920d50, 0x0fd9640a, 0x06d46f04, 0x1dc37216, 0x14ce7918, 0x2bed4832, 0x22e0433c, 0x39f75e2e, 0x30fa5520, 0x9ab701ec, 0x93ba0ae2, 0x88ad17f0, 0x81a01cfe, 0xbe832dd4, 0xb78e26da, 0xac993bc8, 0xa59430c6, 0xd2df599c, 0xdbd25292, 0xc0c54f80, 0xc9c8448e, 0xf6eb75a4, 0xffe67eaa, 0xe4f163b8, 0xedfc68b6, 0x0a67b10c, 0x036aba02, 0x187da710, 0x1170ac1e, 0x2e539d34, 0x275e963a, 0x3c498b28, 0x35448026, 0x420fe97c, 0x4b02e272, 0x5015ff60, 0x5918f46e, 0x663bc544, 0x6f36ce4a, 0x7421d358, 0x7d2cd856, 0xa10c7a37, 0xa8017139, 0xb3166c2b, 0xba1b6725, 0x8538560f, 0x8c355d01, 0x97224013, 0x9e2f4b1d, 0xe9642247, 0xe0692949, 0xfb7e345b, 0xf2733f55, 0xcd500e7f, 0xc45d0571, 0xdf4a1863, 0xd647136d, 0x31dccad7, 0x38d1c1d9, 0x23c6dccb, 0x2acbd7c5, 0x15e8e6ef, 0x1ce5ede1, 0x07f2f0f3, 0x0efffbfd, 0x79b492a7, 0x70b999a9, 0x6bae84bb, 0x62a38fb5, 0x5d80be9f, 0x548db591, 0x4f9aa883, 0x4697a38d ]
+
+    def __init__(self, key):
+
+        if len(key) not in (16, 24, 32):
+            raise ValueError('Invalid key size')
+
+        rounds = self.number_of_rounds[len(key)]
+
+        # Encryption round keys
+        self._Ke = [[0] * 4 for i in range(rounds + 1)]
+
+        # Decryption round keys
+        self._Kd = [[0] * 4 for i in range(rounds + 1)]
+
+        round_key_count = (rounds + 1) * 4
+        KC = len(key) // 4
+
+        # Convert the key into ints
+        tk = [ struct.unpack('>i', key[i:i + 4])[0] for i in range(0, len(key), 4) ]
+
+        # Copy values into round key arrays
+        for i in range(0, KC):
+            self._Ke[i // 4][i % 4] = tk[i]
+            self._Kd[rounds - (i // 4)][i % 4] = tk[i]
+
+        # Key expansion (fips-197 section 5.2)
+        rconpointer = 0
+        t = KC
+        while t < round_key_count:
+
+            tt = tk[KC - 1]
+            tk[0] ^= ((self.S[(tt >> 16) & 0xFF] << 24) ^
+                      (self.S[(tt >>  8) & 0xFF] << 16) ^
+                      (self.S[ tt        & 0xFF] <<  8) ^
+                       self.S[(tt >> 24) & 0xFF]        ^
+                      (self.rcon[rconpointer] << 24))
+            rconpointer += 1
+
+            if KC != 8:
+                for i in range(1, KC):
+                    tk[i] ^= tk[i - 1]
+
+            # Key expansion for 256-bit keys is "slightly different" (fips-197)
+            else:
+                for i in range(1, KC // 2):
+                    tk[i] ^= tk[i - 1]
+                tt = tk[KC // 2 - 1]
+
+                tk[KC // 2] ^= (self.S[ tt        & 0xFF]        ^
+                               (self.S[(tt >>  8) & 0xFF] <<  8) ^
+                               (self.S[(tt >> 16) & 0xFF] << 16) ^
+                               (self.S[(tt >> 24) & 0xFF] << 24))
+
+                for i in range(KC // 2 + 1, KC):
+                    tk[i] ^= tk[i - 1]
+
+            # Copy values into round key arrays
+            j = 0
+            while j < KC and t < round_key_count:
+                self._Ke[t // 4][t % 4] = tk[j]
+                self._Kd[rounds - (t // 4)][t % 4] = tk[j]
+                j += 1
+                t += 1
+
+        # Inverse-Cipher-ify the decryption round key (fips-197 section 5.3)
+        for r in range(1, rounds):
+            for j in range(0, 4):
+                tt = self._Kd[r][j]
+                self._Kd[r][j] = (self.U1[(tt >> 24) & 0xFF] ^
+                                  self.U2[(tt >> 16) & 0xFF] ^
+                                  self.U3[(tt >>  8) & 0xFF] ^
+                                  self.U4[ tt        & 0xFF])
+
+    def encrypt(self, plaintext):
+        'Encrypt a block of plain text using the AES block cipher.'
+
+        if len(plaintext) != 16:
+            raise ValueError('wrong block length')
+
+        rounds = len(self._Ke) - 1
+        (s1, s2, s3) = [1, 2, 3]
+        a = [0, 0, 0, 0]
+
+        # Convert plaintext to (ints ^ key)
+        t = [(AES._compact_word(plaintext[4 * i:4 * i + 4]) ^ self._Ke[0][i]) for i in range(0, 4)]
+
+        # Apply round transforms
+        for r in range(1, rounds):
+            for i in range(0, 4):
+                a[i] = (self.T1[(t[ i          ] >> 24) & 0xFF] ^
+                        self.T2[(t[(i + s1) % 4] >> 16) & 0xFF] ^
+                        self.T3[(t[(i + s2) % 4] >>  8) & 0xFF] ^
+                        self.T4[ t[(i + s3) % 4]        & 0xFF] ^
+                        self._Ke[r][i])
+            t = copy.copy(a)
+
+        # The last round is special
+        result = [ ]
+        for i in range(0, 4):
+            tt = self._Ke[rounds][i]
+            result.append((self.S[(t[ i           ] >> 24) & 0xFF] ^ (tt >> 24)) & 0xFF)
+            result.append((self.S[(t[(i + s1) % 4] >> 16) & 0xFF] ^ (tt >> 16)) & 0xFF)
+            result.append((self.S[(t[(i + s2) % 4] >>  8) & 0xFF] ^ (tt >>  8)) & 0xFF)
+            result.append((self.S[ t[(i + s3) % 4]        & 0xFF] ^  tt       ) & 0xFF)
+
+        return result
+
+    def decrypt(self, ciphertext):
+        'Decrypt a block of cipher text using the AES block cipher.'
+
+        if len(ciphertext) != 16:
+            raise ValueError('wrong block length')
+
+        rounds = len(self._Kd) - 1
+        (s1, s2, s3) = [3, 2, 1]
+        a = [0, 0, 0, 0]
+
+        # Convert ciphertext to (ints ^ key)
+        t = [(AES._compact_word(ciphertext[4 * i:4 * i + 4]) ^ self._Kd[0][i]) for i in range(0, 4)]
+
+        # Apply round transforms
+        for r in range(1, rounds):
+            for i in range(0, 4):
+                a[i] = (self.T5[(t[ i          ] >> 24) & 0xFF] ^
+                        self.T6[(t[(i + s1) % 4] >> 16) & 0xFF] ^
+                        self.T7[(t[(i + s2) % 4] >>  8) & 0xFF] ^
+                        self.T8[ t[(i + s3) % 4]        & 0xFF] ^
+                        self._Kd[r][i])
+            t = copy.copy(a)
+
+        # The last round is special
+        result = [ ]
+        for i in range(0, 4):
+            tt = self._Kd[rounds][i]
+            result.append((self.Si[(t[ i           ] >> 24) & 0xFF] ^ (tt >> 24)) & 0xFF)
+            result.append((self.Si[(t[(i + s1) % 4] >> 16) & 0xFF] ^ (tt >> 16)) & 0xFF)
+            result.append((self.Si[(t[(i + s2) % 4] >>  8) & 0xFF] ^ (tt >>  8)) & 0xFF)
+            result.append((self.Si[ t[(i + s3) % 4]        & 0xFF] ^  tt       ) & 0xFF)
+
+        return result
+
+class AES_128_CBC:
+
+    def __init__(self, key, iv = None):
+        self._aes = AES(key)
+        if iv is None:
+            self._last_cipherblock = [ 0 ] * 16
+        elif len(iv) != 16:
+            raise ValueError('initialization vector must be 16 bytes')
+        else:
+            self._last_cipherblock = iv
+
+
+    def encrypt(self, plaintext):
+        if len(plaintext) != 16:
+            raise ValueError('plaintext block must be 16 bytes')
+
+        precipherblock = [ (p ^ l) for (p, l) in zip(plaintext, self._last_cipherblock) ]
+        self._last_cipherblock = self._aes.encrypt(precipherblock)
+
+        return b''.join(map(lambda x: x.to_bytes(1, 'little'), self._last_cipherblock))
+
+    def decrypt(self, ciphertext):
+        if len(ciphertext) != 16:
+            raise ValueError('ciphertext block must be 16 bytes')
+
+        cipherblock = ciphertext
+        plaintext = [ (p ^ l) for (p, l) in zip(self._aes.decrypt(cipherblock), self._last_cipherblock) ]
+        self._last_cipherblock = cipherblock
+
+        return b''.join(map(lambda x: x.to_bytes(1, 'little'), plaintext))
+
+
+ISP_PROG = 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'
+
+ISP_PROG = binascii.unhexlify(ISP_PROG)
+
+#print('ISP_FLASH progam size (compressed)', len(ISP_PROG))
+ISP_PROG = zlib.decompress(ISP_PROG)
+#print('ISP_FLASH progam size (decompressed)', len(ISP_PROG))
+
+def printProgressBar (iteration, total, prefix = '', suffix = '', decimals = 1, length = 100, fill = '█'):
+    """
+    Call in a loop to create terminal progress bar
+    @params:
+        iteration   - Required  : current iteration (Int)
+        total       - Required  : total iterations (Int)
+        prefix      - Optional  : prefix string (Str)
+        suffix      - Optional  : suffix string (Str)
+        decimals    - Optional  : positive number of decimals in percent complete (Int)
+        length      - Optional  : character length of bar (Int)
+        fill        - Optional  : bar fill character (Str)
+    """
+    percent = ("{0:." + str(decimals) + "f}").format(100 * (iteration / float(total)))
+    filledLength = int(length * iteration // total)
+    bar = fill * filledLength + '-' * (length - filledLength)
+    print('\r%s |%s| %s%% %s' % (prefix, bar, percent, suffix), end = '\r')
+    # Print New Line on Complete
+    if iteration == total:
+        print()
+
+def slip_reader(port):
+    partial_packet = None
+    in_escape = False
+
+    while True:
+        waiting = port.inWaiting()
+        read_bytes = port.read(1 if waiting == 0 else waiting)
+        if read_bytes == b'':
+            raise Exception("Timed out waiting for packet %s" % ("header" if partial_packet is None else "content"))
+        for b in read_bytes:
+
+            if type(b) is int:
+                b = bytes([b])  # python 2/3 compat
+
+            if partial_packet is None:  # waiting for packet header
+                if b == b'\xc0':
+                    partial_packet = b""
+                else:
+                    raise Exception('Invalid head of packet (%r)' % b)
+            elif in_escape:  # part-way through escape sequence
+                in_escape = False
+                if b == b'\xdc':
+                    partial_packet += b'\xc0'
+                elif b == b'\xdd':
+                    partial_packet += b'\xdb'
+                else:
+                    raise Exception('Invalid SLIP escape (%r%r)' % (b'\xdb', b))
+            elif b == b'\xdb':  # start of escape sequence
+                in_escape = True
+            elif b == b'\xc0':  # end of packet
+                yield partial_packet
+                partial_packet = None
+            else:  # normal byte in packet
+                partial_packet += b
+
+
+class ISPResponse:
+    class ISPOperation(Enum):
+        ISP_ECHO = 0xC1
+        ISP_NOP = 0xC2
+        ISP_MEMORY_WRITE = 0xC3
+        ISP_MEMORY_READ = 0xC4
+        ISP_MEMORY_BOOT = 0xC5
+        ISP_DEBUG_INFO = 0xD1
+
+    class ErrorCode(Enum):
+        ISP_RET_DEFAULT = 0
+        ISP_RET_OK = 0xE0
+        ISP_RET_BAD_DATA_LEN = 0xE1
+        ISP_RET_BAD_DATA_CHECKSUM = 0xE2
+        ISP_RET_INVALID_COMMAND = 0xE3
+
+    @staticmethod
+    def parse(data):
+        op = data[0]
+        reason = data[1]
+        text = ''
+        try:
+            if ISPResponse.ISPOperation(op) == ISPResponse.ISPOperation.ISP_DEBUG_INFO:
+                text = data[2:].decode()
+        except ValueError:
+            print('Warning: recv unknown op', op)
+
+        return (op, reason, text)
+
+
+class FlashModeResponse:
+    class Operation(Enum):
+        ISP_DEBUG_INFO = 0xD1
+        ISP_NOP = 0xD2
+        ISP_FLASH_ERASE = 0xD3
+        ISP_FLASH_WRITE = 0xD4
+        ISP_REBOOT = 0xD5
+        ISP_UARTHS_BAUDRATE_SET = 0xD6
+        FLASHMODE_FLASH_INIT = 0xD7
+
+    class ErrorCode(Enum):
+        ISP_RET_DEFAULT = 0
+        ISP_RET_OK = 0xE0
+        ISP_RET_BAD_DATA_LEN = 0xE1
+        ISP_RET_BAD_DATA_CHECKSUM = 0xE2
+        ISP_RET_INVALID_COMMAND = 0xE3
+
+    @staticmethod
+    def parse(data):
+        op = data[0]
+        reason = data[1]
+        text = ''
+        if FlashModeResponse.Operation(op) == FlashModeResponse.Operation.ISP_DEBUG_INFO:
+            text = data[2:].decode()
+
+        return (op, reason, text)
+
+
+def chunks(l, n):
+    """Yield successive n-sized chunks from l."""
+    for i in range(0, len(l), n):
+        yield l[i:i + n]
+
+
+class MAIXLoader:
+    def change_baudrate(self, baudrate):
+        print(INFO_MSG,"Selected Baudrate: ", baudrate, BASH_TIPS['DEFAULT'])
+        out = struct.pack('III', 0, 4, baudrate)
+        crc32_checksum = struct.pack('I', binascii.crc32(out) & 0xFFFFFFFF)
+        out = struct.pack('HH', 0xd6, 0x00) + crc32_checksum + out
+        self.write(out)
+        time.sleep(0.05)
+        self._port.baudrate = baudrate
+
+    def __init__(self, port='/dev/ttyUSB1', baudrate=115200):
+        # configure the serial connections (the parameters differs on the device you are connecting to)
+        self._port = serial.Serial(
+            port=port,
+            baudrate=baudrate,
+            parity=serial.PARITY_NONE,
+            stopbits=serial.STOPBITS_ONE,
+            bytesize=serial.EIGHTBITS,
+            timeout=0.1
+        )
+        print(INFO_MSG, "Default baudrate is", baudrate, ", later it may be changed to the value you set.",  BASH_TIPS['DEFAULT'])
+
+        self._port.isOpen()
+        self._slip_reader = slip_reader(self._port)
+
+    """ Read a SLIP packet from the serial port """
+
+    def read(self):
+        return next(self._slip_reader)
+
+    """ Write bytes to the serial port while performing SLIP escaping """
+
+    def write(self, packet):
+        buf = b'\xc0' \
+              + (packet.replace(b'\xdb', b'\xdb\xdd').replace(b'\xc0', b'\xdb\xdc')) \
+              + b'\xc0'
+        #print('[WRITE]', binascii.hexlify(buf))
+        return self._port.write(buf)
+
+    def read_loop(self):
+        out = b''
+        # while self._port.inWaiting() > 0:
+        #     out += self._port.read(1)
+
+        # print(out)
+        while 1:
+            sys.stdout.write('[RECV] raw data: ')
+            sys.stdout.write(binascii.hexlify(self._port.read(1)).decode())
+            sys.stdout.flush()
+
+    def recv_one_return(self):
+        timeout_init = time.time()
+        data = b''
+        # find start boarder
+        #sys.stdout.write('[RECV one return] raw data: ')
+        while 1:
+            if time.time() - timeout_init > timeout:
+                raise TimeoutError
+            c = self._port.read(1)
+            #sys.stdout.write(binascii.hexlify(c).decode())
+            sys.stdout.flush()
+            if c == b'\xc0':
+                break
+
+        in_escape = False
+        while 1:
+            if time.time() - timeout_init > timeout:
+                raise TimeoutError
+            c = self._port.read(1)
+            #sys.stdout.write(binascii.hexlify(c).decode())
+            sys.stdout.flush()
+            if c == b'\xc0':
+                break
+
+            elif in_escape:  # part-way through escape sequence
+                in_escape = False
+                if c == b'\xdc':
+                    data += b'\xc0'
+                elif c == b'\xdd':
+                    data += b'\xdb'
+                else:
+                    raise Exception('Invalid SLIP escape (%r%r)' % (b'\xdb', b))
+            elif c == b'\xdb':  # start of escape sequence
+                in_escape = True
+
+            data += c
+
+        #sys.stdout.write('\n')
+        return data
+
+    def reset_to_isp_kd233(self):
+        self._port.setDTR (False)
+        self._port.setRTS (False)
+        time.sleep(0.01)
+        #print('-- RESET to LOW, IO16 to HIGH --')
+        # Pull reset down and keep 10ms
+        self._port.setDTR (True)
+        self._port.setRTS (False)
+        time.sleep(0.01)
+        #print('-- IO16 to LOW, RESET to HIGH --')
+        # Pull IO16 to low and release reset
+        self._port.setRTS (True)
+        self._port.setDTR (False)
+        time.sleep(0.01)
+
+    def reset_to_isp_dan(self):
+        self._port.dtr = False
+        self._port.rts = False
+        time.sleep(0.01)
+        #print('-- RESET to LOW, IO16 to HIGH --')
+        # Pull reset down and keep 10ms
+        self._port.dtr = False
+        self._port.rts = True
+        time.sleep(0.01)
+        #print('-- IO16 to LOW, RESET to HIGH --')
+        # Pull IO16 to low and release reset
+        self._port.rts = False
+        self._port.dtr = True
+        time.sleep(0.01)
+
+    def reset_to_boot(self):
+        self._port.setDTR (False)
+        self._port.setRTS (False)
+        time.sleep(0.01)
+        #print('-- RESET to LOW --')
+        # Pull reset down and keep 10ms
+        self._port.setRTS (False)
+        self._port.setDTR (True)
+        time.sleep(0.01)
+        #print('-- RESET to HIGH, BOOT --')
+        # Pull IO16 to low and release reset
+        self._port.setRTS (False)
+        self._port.setDTR (False)
+        time.sleep(0.01)
+
+    def greeting(self):
+        self._port.write(b'\xc0\xc2\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xc0')
+        op, reason, text = ISPResponse.parse(self.recv_one_return())
+
+        #print('MAIX return op:', ISPResponse.ISPOperation(op).name, 'reason:', ISPResponse.ErrorCode(reason).name)
+
+
+    def flash_greeting(self):
+        retry_count = 0
+        while 1:
+            self._port.write(b'\xc0\xd2\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xc0')
+            retry_count = retry_count + 1
+            try:
+                op, reason, text = FlashModeResponse.parse(self.recv_one_return())
+            except IndexError:
+                if retry_count > MAX_RETRY_TIMES:
+                    print(ERROR_MSG,"Failed to Connect to K210's Stub",BASH_TIPS['DEFAULT'])
+                    sys.exit(1)
+                time.sleep(0.1)
+                continue
+                print(WARN_MSG,"Unexcepted Return recevied, retrying...",BASH_TIPS['DEFAULT'])
+            #print('MAIX return op:', FlashModeResponse.Operation(op).name, 'reason:',
+            #      FlashModeResponse.ErrorCode(reason).name)
+            if FlashModeResponse.Operation(op) == FlashModeResponse.Operation.ISP_NOP:
+                print(INFO_MSG,"Boot to Flashmode Successfully",BASH_TIPS['DEFAULT'])
+                break
+            else:
+                if retry_count > MAX_RETRY_TIMES:
+                    print(ERROR_MSG,"Failed to Connect to K210's Stub",BASH_TIPS['DEFAULT'])
+                    sys.exit(1)
+                print(WARN_MSG,"Unexcepted Return recevied, retrying...",BASH_TIPS['DEFAULT'])
+                time.sleep(0.1)
+                continue
+
+    def boot(self, address=0x80000000):
+        print(INFO_MSG,"Booting From " + hex(address),BASH_TIPS['DEFAULT'])
+
+        out = struct.pack('II', address, 0)
+
+        crc32_checksum = struct.pack('I', binascii.crc32(out) & 0xFFFFFFFF)
+
+        out = struct.pack('HH', 0xc5, 0x00) + crc32_checksum + out  # op: ISP_MEMORY_WRITE: 0xc3
+        self.write(out)
+
+    def recv_debug(self):
+        op, reason, text = ISPResponse.parse(self.recv_one_return())
+        #print('[RECV] op:', ISPResponse.ISPOperation(op).name, 'reason:', ISPResponse.ErrorCode(reason).name)
+        if text:
+            print('-' * 30)
+            print(text)
+            print('-' * 30)
+        if ISPResponse.ErrorCode(reason) not in (ISPResponse.ErrorCode.ISP_RET_DEFAULT, ISPResponse.ErrorCode.ISP_RET_OK):
+            print('Failed, retry, errcode=', hex(reason))
+            return False
+        return True
+
+    def flash_recv_debug(self):
+        op, reason, text = FlashModeResponse.parse(self.recv_one_return())
+        #print('[Flash-RECV] op:', FlashModeResponse.Operation(op).name, 'reason:',
+        #      FlashModeResponse.ErrorCode(reason).name)
+        if text:
+            print('-' * 30)
+            print(text)
+            print('-' * 30)
+
+        if FlashModeResponse.ErrorCode(reason) not in (FlashModeResponse.ErrorCode.ISP_RET_OK, FlashModeResponse.ErrorCode.ISP_RET_OK):
+            print('Failed, retry')
+            return False
+        return True
+
+    def init_flash(self, chip_type):
+        chip_type = int(chip_type)
+        print(INFO_MSG,"Selected Flash: ",("In-Chip", "On-Board")[chip_type],BASH_TIPS['DEFAULT'])
+        out = struct.pack('II', chip_type, 0)
+        crc32_checksum = struct.pack('I', binascii.crc32(out) & 0xFFFFFFFF)
+
+        out = struct.pack('HH', 0xd7, 0x00) + crc32_checksum + out
+
+        sent = self.write(out)
+        op, reason, text = FlashModeResponse.parse(self.recv_one_return())
+        #print('MAIX return op:', FlashModeResponse.Operation(op).name, 'reason:',
+        #      FlashModeResponse.ErrorCode(reason).name)
+
+    def flash_dataframe(self, data, address=0x80000000):
+        DATAFRAME_SIZE = 1024
+        data_chunks = chunks(data, DATAFRAME_SIZE)
+        #print('[DEBUG] flash dataframe | data length:', len(data))
+        total_chunk = math.ceil(len(data)/DATAFRAME_SIZE)
+
+        for n, chunk in enumerate(data_chunks):
+            while 1:
+                #print('[INFO] sending chunk', i, '@address', hex(address), 'chunklen', len(chunk))
+                out = struct.pack('II', address, len(chunk))
+
+                crc32_checksum = struct.pack('I', binascii.crc32(out + chunk) & 0xFFFFFFFF)
+
+                out = struct.pack('HH', 0xc3, 0x00) + crc32_checksum + out + chunk  # op: ISP_MEMORY_WRITE: 0xc3
+                sent = self.write(out)
+                #print('[INFO]', 'sent', sent, 'bytes', 'checksum', binascii.hexlify(crc32_checksum).decode())
+
+                address += len(chunk)
+
+                if self.recv_debug():
+                    break
+            printProgressBar(n+1, total_chunk, prefix = 'Downloading ISP:', suffix = 'Complete', length = 50)
+
+    def dump_to_flash(self, data, address=0):
+        '''
+        typedef struct __attribute__((packed)) {
+            uint8_t op;
+            int32_t checksum; // 下面的所有字段都要参与checksum的计算
+            uint32_t address;
+            uint32_t data_len;
+            uint8_t data_buf[1024];
+        } isp_request_t;
+        '''
+
+        DATAFRAME_SIZE = 4096
+        data_chunks = chunks(data, DATAFRAME_SIZE)
+        #print('[DEBUG] flash dataframe | data length:', len(data))
+
+
+
+        for n, chunk in enumerate(data_chunks):
+            #print('[INFO] sending chunk', i, '@address', hex(address))
+            out = struct.pack('II', address, len(chunk))
+
+            crc32_checksum = struct.pack('I', binascii.crc32(out + chunk) & 0xFFFFFFFF)
+
+            out = struct.pack('HH', 0xd4, 0x00) + crc32_checksum + out + chunk
+            #print("[$$$$]", binascii.hexlify(out[:32]).decode())
+            retry_count = 0
+            while True:
+                try:
+                    sent = self.write(out)
+                    #print('[INFO]', 'sent', sent, 'bytes', 'checksum', crc32_checksum)
+                    self.flash_recv_debug()
+                except:
+                    retry_count = retry_count + 1
+                    if retry_count > MAX_RETRY_TIMES:
+                        print(ERROR_MSG,"Error Count Exceeded, Stop Trying",BASH_TIPS['DEFAULT'])
+                        sys.exit(1)
+                    continue
+                break
+            address += len(chunk)
+
+
+
+    def flash_erase(self):
+        #print('[DEBUG] erasing spi flash.')
+        self._port.write(b'\xc0\xd3\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xc0')
+        op, reason, text = FlashModeResponse.parse(self.recv_one_return())
+        #print('MAIX return op:', FlashModeResponse.Operation(op).name, 'reason:',
+        #      FlashModeResponse.ErrorCode(reason).name)
+
+    def install_flash_bootloader(self, data):
+        # 1. 刷入 flash bootloader
+        self.flash_dataframe(data, address=0x80000000)
+
+    def flash_firmware(self, firmware_bin: bytes, aes_key: bytes = None, address_offset = 0, sha256Prefix = True):
+        #print('[DEBUG] flash_firmware DEBUG: aeskey=', aes_key)
+
+        if sha256Prefix == True:
+            # 固件加上头
+            # 格式: SHA256(after)(32bytes) + AES_CIPHER_FLAG (1byte) + firmware_size(4bytes) + firmware_data
+            aes_cipher_flag = b'\x01' if aes_key else b'\x00'
+
+            # 加密
+            if aes_key:
+                enc = AES_128_CBC(aes_key, iv=b'\x00'*16).encrypt
+                padded = firmware_bin + b'\x00'*15 # zero pad
+                firmware_bin = b''.join([enc(padded[i*16:i*16+16]) for i in range(len(padded)//16)])
+
+            firmware_len = len(firmware_bin)
+
+            data = aes_cipher_flag + struct.pack('I', firmware_len) + firmware_bin
+
+            sha256_hash = hashlib.sha256(data).digest()
+
+            firmware_with_header = data + sha256_hash
+
+            total_chunk = math.ceil(len(firmware_with_header)/4096)
+            # 3. 分片刷入固件
+            data_chunks = chunks(firmware_with_header, 4096)  # 4kb for a sector
+        else:
+            total_chunk = math.ceil(len(firmware_bin)/4096)
+            data_chunks = chunks(firmware_bin, 4096)
+
+        for n, chunk in enumerate(data_chunks):
+            chunk = chunk.ljust(4096, b'\x00')  # align by 4kb
+
+            # 3.1 刷入一个dataframe
+            #print('[INFO]', 'Write firmware data piece')
+            self.dump_to_flash(chunk, address= n * 4096 + address_offset)
+            printProgressBar(n+1, total_chunk, prefix = 'Downloading:', suffix = 'Complete', length = 50)
+
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser()
+    parser.add_argument("-p", "--port", help="COM Port", default="DEFAULT")
+    parser.add_argument("-c", "--chip", help="SPI Flash type, 1 for in-chip, 0 for on-board", default=1)
+    parser.add_argument("-b", "--baudrate", type=int, help="UART baudrate for uploading firmware", default=115200)
+    parser.add_argument("-l", "--bootloader", help="bootloader bin path", required=False, default=None)
+    parser.add_argument("-k", "--key", help="AES key in hex, if you need encrypt your firmware.", required=False, default=None)
+    parser.add_argument("-v", "--verbose", help="increase output verbosity", default=False,
+                        action="store_true")
+    parser.add_argument("-t", "--terminal", help="Start a terminal after finish", default=False, action="store_true")
+    parser.add_argument("firmware", help="firmware bin path")
+
+    args = parser.parse_args()
+    if args.port == "DEFAULT":
+        try:
+            list_port_info = next(serial.tools.list_ports.grep(VID_LIST_FOR_AUTO_LOOKUP)) #Take the first one within the list
+            print(INFO_MSG,"COM Port Auto Detected, Selected ",list_port_info.device,BASH_TIPS['DEFAULT'])
+            _port = list_port_info.device
+        except StopIteration:
+            print(ERROR_MSG,"No vaild COM Port found in Auto Detect, Check Your Connection or Specify One by"+BASH_TIPS['GREEN']+'`--port/-p`',BASH_TIPS['DEFAULT'])
+            sys.exit(1)
+    else:
+        _port = args.port
+        print(INFO_MSG,"COM Port Selected Manually: ",_port,BASH_TIPS['DEFAULT'])
+
+    loader = MAIXLoader(port=_port, baudrate=115200)
+
+
+    # 1. Greeting.
+    print(INFO_MSG,"Trying to Enter the ISP Mode...",BASH_TIPS['DEFAULT'])
+
+    retry_count = 0
+
+    while 1:
+        retry_count = retry_count + 1
+        if retry_count > 15:
+            print("\n" + ERROR_MSG,"No vaild Kendryte K210 found in Auto Detect, Check Your Connection or Specify One by"+BASH_TIPS['GREEN']+'`-p '+('/dev/ttyUSB0', 'COM3')[sys.platform == 'win32']+'`',BASH_TIPS['DEFAULT'])
+            sys.exit(1)
+        try:
+            print('.', end='')
+            loader.reset_to_isp_dan()
+            loader.greeting()
+            break
+        except TimeoutError:
+            pass
+
+        try:
+            print('_', end='')
+            loader.reset_to_isp_kd233()
+            loader.greeting()
+            break
+        except TimeoutError:
+            pass
+    timeout = 3
+    print()
+    print(INFO_MSG,"Greeting Message Detected, Start Downloading ISP",BASH_TIPS['DEFAULT'])
+    # 2. flash bootloader and firmware
+    try:
+        firmware_bin = open(args.firmware, 'rb')
+    except FileNotFoundError:
+        print(ERROR_MSG,'Unable to find the firmware at ', args.firmware, BASH_TIPS['DEFAULT'])
+        sys.exit(1)
+
+    # install bootloader at 0x80000000
+    if args.bootloader:
+        loader.install_flash_bootloader(open(args.bootloader, 'rb').read())
+    else:
+        loader.install_flash_bootloader(ISP_PROG)
+
+    loader.boot()
+
+    print(INFO_MSG,"Wait For 0.3 second for ISP to Boot", BASH_TIPS['DEFAULT'])
+
+    time.sleep(0.3)
+
+    loader.flash_greeting()
+
+    if args.baudrate != 115200:
+        loader.change_baudrate(args.baudrate)
+
+    loader.init_flash(args.chip)
+
+    if ".kfpkg" == os.path.splitext(args.firmware)[1]:
+        print(INFO_MSG,"Extracting KFPKG ... ", BASH_TIPS['DEFAULT'])
+        firmware_bin.close()
+        with tempfile.TemporaryDirectory() as tmpdir:
+            try:
+                with zipfile.ZipFile(args.firmware) as zf:
+                    zf.extractall(tmpdir)
+            except zipfile.BadZipFile:
+                print(ERROR_MSG,'Unable to Decompress the kfpkg, your file might be corrupted.',BASH_TIPS['DEFAULT'])
+                sys.exit(1)
+
+            fFlashList = open(os.path.join(tmpdir, 'flash-list.json'), "r")
+            sFlashList = re.sub(r'"address": (.*),', r'"address": "\1",', fFlashList.read()) #Pack the Hex Number in json into str
+            fFlashList.close()
+            jsonFlashList = json.loads(sFlashList)
+            for lBinFiles in jsonFlashList['files']:
+                print(INFO_MSG,"Writing",lBinFiles['bin'],"into","0x%08x"%int(lBinFiles['address'], 0),BASH_TIPS['DEFAULT'])
+                firmware_bin = open(os.path.join(tmpdir, lBinFiles["bin"]), "rb")
+                loader.flash_firmware(firmware_bin.read(), None, int(lBinFiles['address'], 0), lBinFiles['sha256Prefix'])
+                firmware_bin.close()
+    else:
+        if args.key:
+            aes_key = binascii.a2b_hex(args.key)
+            if len(aes_key) != 16:
+                raise ValueError('AES key must by 16 bytes')
+
+            loader.flash_firmware(firmware_bin.read(), aes_key=aes_key)
+        else:
+            loader.flash_firmware(firmware_bin.read())
+
+    # 3. boot
+    loader.reset_to_boot()
+    print(INFO_MSG,"Rebooting...", BASH_TIPS['DEFAULT'])
+    loader._port.close()
+
+    if(args.terminal == True):
+        import serial.tools.miniterm
+        sys.argv = ['']
+        serial.tools.miniterm.main(default_port=_port, default_baudrate=115200, default_dtr=False, default_rts=False)
diff --git a/tools/opensbi/README.md b/tools/opensbi/README.md
new file mode 100644
index 0000000..a992b69
--- /dev/null
+++ b/tools/opensbi/README.md
@@ -0,0 +1,13 @@
+# OpenSBI
+
+These are binary release of OpenSBI on this [commit](https://github.com/riscv/opensbi/tree/194dbbe5a13dff2255411c26d249f3ad4ef42c0b) at 2019.04.15.
+
+- virt_rv32.elf: opensbi-0.3-rv32-bin/platform/qemu/virt/firmware/fw_jump.elf
+- virt_rv64.elf: opensbi-0.3-rv64-bin/platform/qemu/virt/firmware/fw_jump.elf
+
+NOTE: The [official v0.3 release](https://github.com/riscv/opensbi/releases/tag/v0.3) has bug on serial interrupt. Also, Rocket-Chip based CPUs (including SiFive Unleashed) seem to have unintended behavior on
+
+For K210 & SiFive Unleashed: It needs some modification. The binary is from this [commit](https://github.com/rcore-os/opensbi/commit/a9638d092756975ceb50073d736a17cef439c7b6).
+
+* k210.elf: build/platform/kendryte/k210/firmware/fw_payload.elf
+* fu540.elf: build/platform/sifive/fu540/firmware/fw_jump.elf
diff --git a/tools/opensbi/fu540.elf b/tools/opensbi/fu540.elf
new file mode 100755
index 0000000..5aeeb11
Binary files /dev/null and b/tools/opensbi/fu540.elf differ
diff --git a/tools/opensbi/k210.elf b/tools/opensbi/k210.elf
new file mode 100755
index 0000000..221c37e
Binary files /dev/null and b/tools/opensbi/k210.elf differ
diff --git a/tools/opensbi/virt_rv32.elf b/tools/opensbi/virt_rv32.elf
new file mode 100755
index 0000000..1bebfb0
Binary files /dev/null and b/tools/opensbi/virt_rv32.elf differ
diff --git a/tools/opensbi/virt_rv64.elf b/tools/opensbi/virt_rv64.elf
new file mode 100755
index 0000000..6e941c0
Binary files /dev/null and b/tools/opensbi/virt_rv64.elf differ
diff --git a/user b/user
index 8dbc0ed..05f0efd 160000
--- a/user
+++ b/user
@@ -1 +1 @@
-Subproject commit 8dbc0edb935a62d748aaac39258d4a985de0ae17
+Subproject commit 05f0efd3fda084109e4b6da8ff30ecb1557a267f