diff --git a/console.c b/console.c
new file mode 100644
index 0000000..40e0629
--- /dev/null
+++ b/console.c
@@ -0,0 +1,732 @@
+/*
+ *  linux/kernel/console.c
+ *
+ *  (C) 1991  Linus Torvalds
+ */
+
+/*
+ *	console.c
+ *
+ * This module implements the console io functions
+ *	'void con_init(void)'
+ *	'void con_write(struct tty_queue * queue)'
+ * Hopefully this will be a rather complete VT102 implementation.
+ *
+ * Beeping thanks to John T Kohl.
+ */
+
+/*
+ *  NOTE!!! We sometimes disable and enable interrupts for a short while
+ * (to put a word in video IO), but this will work even for keyboard
+ * interrupts. We know interrupts aren't enabled when getting a keyboard
+ * interrupt, as we use trap-gates. Hopefully all is well.
+ */
+
+/*
+ * Code to check for different video-cards mostly by Galen Hunt,
+ * <g-hunt@ee.utah.edu>
+ */
+
+#include <linux/sched.h>
+#include <linux/tty.h>
+#include <asm/io.h>
+#include <asm/system.h>
+
+/*
+ * These are set up by the setup-routine at boot-time:
+ */
+
+#define ORIG_X			(*(unsigned char *)0x90000)
+#define ORIG_Y			(*(unsigned char *)0x90001)
+#define ORIG_VIDEO_PAGE		(*(unsigned short *)0x90004)
+#define ORIG_VIDEO_MODE		((*(unsigned short *)0x90006) & 0xff)
+#define ORIG_VIDEO_COLS 	(((*(unsigned short *)0x90006) & 0xff00) >> 8)
+#define ORIG_VIDEO_LINES	(25)
+#define ORIG_VIDEO_EGA_AX	(*(unsigned short *)0x90008)
+#define ORIG_VIDEO_EGA_BX	(*(unsigned short *)0x9000a)
+#define ORIG_VIDEO_EGA_CX	(*(unsigned short *)0x9000c)
+
+#define VIDEO_TYPE_MDA		0x10	/* Monochrome Text Display	*/
+#define VIDEO_TYPE_CGA		0x11	/* CGA Display 			*/
+#define VIDEO_TYPE_EGAM		0x20	/* EGA/VGA in Monochrome Mode	*/
+#define VIDEO_TYPE_EGAC		0x21	/* EGA/VGA in Color Mode	*/
+
+#define NPAR 16
+
+extern void keyboard_interrupt(void);
+extern void mouse_interrupt(void);
+
+static unsigned char	video_type;		/* Type of display being used	*/
+static unsigned long	video_num_columns;	/* Number of text columns	*/
+static unsigned long	video_size_row;		/* Bytes per row		*/
+static unsigned long	video_num_lines;	/* Number of test lines		*/
+static unsigned char	video_page;		/* Initial video page		*/
+static unsigned long	video_mem_start;	/* Start of video RAM		*/
+static unsigned long	video_mem_end;		/* End of video RAM (sort of)	*/
+static unsigned short	video_port_reg;		/* Video register select port	*/
+static unsigned short	video_port_val;		/* Video register value port	*/
+static unsigned short	video_erase_char;	/* Char+Attrib to erase with	*/
+
+static unsigned long	origin;		/* Used for EGA/VGA fast scroll	*/
+static unsigned long	scr_end;	/* Used for EGA/VGA fast scroll	*/
+static unsigned long	pos;
+static unsigned long	x,y;
+static unsigned long	top,bottom;
+static unsigned long	state=0;
+static unsigned long	npar,par[NPAR];
+static unsigned long	ques=0;
+static unsigned char	attr=0x07;
+
+static void sysbeep(void);
+
+/*
+ * this is what the terminal answers to a ESC-Z or csi0c
+ * query (= vt100 response).
+ */
+#define RESPONSE "\033[?1;2c"
+
+/* NOTE! gotoxy thinks x==video_num_columns is ok */
+static inline void gotoxy(unsigned int new_x,unsigned int new_y)
+{
+	if (new_x > video_num_columns || new_y >= video_num_lines)
+		return;
+	x=new_x;
+	y=new_y;
+	pos=origin + y*video_size_row + (x<<1);
+}
+
+static inline void set_origin(void)
+{
+	cli();
+	outb_p(12, video_port_reg);
+	outb_p(0xff&((origin-video_mem_start)>>9), video_port_val);
+	outb_p(13, video_port_reg);
+	outb_p(0xff&((origin-video_mem_start)>>1), video_port_val);
+	sti();
+}
+
+static void scrup(void)
+{
+	if (video_type == VIDEO_TYPE_EGAC || video_type == VIDEO_TYPE_EGAM)
+	{
+		if (!top && bottom == video_num_lines) {
+			origin += video_size_row;
+			pos += video_size_row;
+			scr_end += video_size_row;
+			if (scr_end > video_mem_end) {
+				__asm__("cld\n\t"
+					"rep\n\t"
+					"movsl\n\t"
+					"movl video_num_columns,%1\n\t"
+					"rep\n\t"
+					"stosw"
+					::"a" (video_erase_char),
+					"c" ((video_num_lines-1)*video_num_columns>>1),
+					"D" (video_mem_start),
+					"S" (origin)
+					);
+				scr_end -= origin-video_mem_start;
+				pos -= origin-video_mem_start;
+				origin = video_mem_start;
+			} else {
+				__asm__("cld\n\t"
+					"rep\n\t"
+					"stosw"
+					::"a" (video_erase_char),
+					"c" (video_num_columns),
+					"D" (scr_end-video_size_row)
+					);
+			}
+			set_origin();
+		} else {
+			__asm__("cld\n\t"
+				"rep\n\t"
+				"movsl\n\t"
+				"movl video_num_columns,%%ecx\n\t"
+				"rep\n\t"
+				"stosw"
+				::"a" (video_erase_char),
+				"c" ((bottom-top-1)*video_num_columns>>1),
+				"D" (origin+video_size_row*top),
+				"S" (origin+video_size_row*(top+1))
+				);
+		}
+	}
+	else		/* Not EGA/VGA */
+	{
+		__asm__("cld\n\t"
+			"rep\n\t"
+			"movsl\n\t"
+			"movl video_num_columns,%%ecx\n\t"
+			"rep\n\t"
+			"stosw"
+			::"a" (video_erase_char),
+			"c" ((bottom-top-1)*video_num_columns>>1),
+			"D" (origin+video_size_row*top),
+			"S" (origin+video_size_row*(top+1))
+			);
+	}
+}
+
+static void scrdown(void)
+{
+	if (video_type == VIDEO_TYPE_EGAC || video_type == VIDEO_TYPE_EGAM)
+	{
+		__asm__("std\n\t"
+			"rep\n\t"
+			"movsl\n\t"
+			"addl $2,%%edi\n\t"	/* %edi has been decremented by 4 */
+			"movl video_num_columns,%%ecx\n\t"
+			"rep\n\t"
+			"stosw"
+			::"a" (video_erase_char),
+			"c" ((bottom-top-1)*video_num_columns>>1),
+			"D" (origin+video_size_row*bottom-4),
+			"S" (origin+video_size_row*(bottom-1)-4)
+			);
+	}
+	else		/* Not EGA/VGA */
+	{
+		__asm__("std\n\t"
+			"rep\n\t"
+			"movsl\n\t"
+			"addl $2,%%edi\n\t"	/* %edi has been decremented by 4 */
+			"movl video_num_columns,%%ecx\n\t"
+			"rep\n\t"
+			"stosw"
+			::"a" (video_erase_char),
+			"c" ((bottom-top-1)*video_num_columns>>1),
+			"D" (origin+video_size_row*bottom-4),
+			"S" (origin+video_size_row*(bottom-1)-4)
+			);
+	}
+}
+
+static void lf(void)
+{
+	if (y+1<bottom) {
+		y++;
+		pos += video_size_row;
+		return;
+	}
+	scrup();
+}
+
+static void ri(void)
+{
+	if (y>top) {
+		y--;
+		pos -= video_size_row;
+		return;
+	}
+	scrdown();
+}
+
+static void cr(void)
+{
+	pos -= x<<1;
+	x=0;
+}
+
+static void del(void)
+{
+	if (x) {
+		pos -= 2;
+		x--;
+		*(unsigned short *)pos = video_erase_char;
+	}
+}
+
+static void csi_J(int par)
+{
+	long count __asm__("cx");
+	long start __asm__("di");
+
+	switch (par) {
+		case 0:	/* erase from cursor to end of display */
+			count = (scr_end-pos)>>1;
+			start = pos;
+			break;
+		case 1:	/* erase from start to cursor */
+			count = (pos-origin)>>1;
+			start = origin;
+			break;
+		case 2: /* erase whole display */
+			count = video_num_columns * video_num_lines;
+			start = origin;
+			break;
+		default:
+			return;
+	}
+	__asm__("cld\n\t"
+		"rep\n\t"
+		"stosw\n\t"
+		::"c" (count),
+		"D" (start),"a" (video_erase_char)
+		);
+}
+
+static void csi_K(int par)
+{
+	long count __asm__("cx");
+	long start __asm__("di");
+
+	switch (par) {
+		case 0:	/* erase from cursor to end of line */
+			if (x>=video_num_columns)
+				return;
+			count = video_num_columns-x;
+			start = pos;
+			break;
+		case 1:	/* erase from start of line to cursor */
+			start = pos - (x<<1);
+			count = (x<video_num_columns)?x:video_num_columns;
+			break;
+		case 2: /* erase whole line */
+			start = pos - (x<<1);
+			count = video_num_columns;
+			break;
+		default:
+			return;
+	}
+	__asm__("cld\n\t"
+		"rep\n\t"
+		"stosw\n\t"
+		::"c" (count),
+		"D" (start),"a" (video_erase_char)
+		);
+}
+
+void csi_m(void)
+{
+	int i;
+
+	for (i=0;i<=npar;i++)
+		switch (par[i]) {
+			case 0:attr=0x07;break;
+			case 1:attr=0x0f;break;
+			case 4:attr=0x0f;break;
+			case 7:attr=0x70;break;
+			case 27:attr=0x07;break;
+		}
+}
+
+static inline void set_cursor(void)
+{
+	cli();
+	outb_p(14, video_port_reg);
+	outb_p(0xff&((pos-video_mem_start)>>9), video_port_val);
+	outb_p(15, video_port_reg);
+	outb_p(0xff&((pos-video_mem_start)>>1), video_port_val);
+	sti();
+}
+
+static void respond(struct tty_struct * tty)
+{
+	char * p = RESPONSE;
+
+	cli();
+	while (*p) {
+		PUTCH(*p,tty->read_q);
+		p++;
+	}
+	sti();
+	copy_to_cooked(tty);
+}
+
+static void insert_char(void)
+{
+	int i=x;
+	unsigned short tmp, old = video_erase_char;
+	unsigned short * p = (unsigned short *) pos;
+
+	while (i++<video_num_columns) {
+		tmp=*p;
+		*p=old;
+		old=tmp;
+		p++;
+	}
+}
+
+static void insert_line(void)
+{
+	int oldtop,oldbottom;
+
+	oldtop=top;
+	oldbottom=bottom;
+	top=y;
+	bottom = video_num_lines;
+	scrdown();
+	top=oldtop;
+	bottom=oldbottom;
+}
+
+static void delete_char(void)
+{
+	int i;
+	unsigned short * p = (unsigned short *) pos;
+
+	if (x>=video_num_columns)
+		return;
+	i = x;
+	while (++i < video_num_columns) {
+		*p = *(p+1);
+		p++;
+	}
+	*p = video_erase_char;
+}
+
+static void delete_line(void)
+{
+	int oldtop,oldbottom;
+
+	oldtop=top;
+	oldbottom=bottom;
+	top=y;
+	bottom = video_num_lines;
+	scrup();
+	top=oldtop;
+	bottom=oldbottom;
+}
+
+static void csi_at(unsigned int nr)
+{
+	if (nr > video_num_columns)
+		nr = video_num_columns;
+	else if (!nr)
+		nr = 1;
+	while (nr--)
+		insert_char();
+}
+
+static void csi_L(unsigned int nr)
+{
+	if (nr > video_num_lines)
+		nr = video_num_lines;
+	else if (!nr)
+		nr = 1;
+	while (nr--)
+		insert_line();
+}
+
+static void csi_P(unsigned int nr)
+{
+	if (nr > video_num_columns)
+		nr = video_num_columns;
+	else if (!nr)
+		nr = 1;
+	while (nr--)
+		delete_char();
+}
+
+static void csi_M(unsigned int nr)
+{
+	if (nr > video_num_lines)
+		nr = video_num_lines;
+	else if (!nr)
+		nr=1;
+	while (nr--)
+		delete_line();
+}
+
+static int saved_x=0;
+static int saved_y=0;
+
+static void save_cur(void)
+{
+	saved_x=x;
+	saved_y=y;
+}
+
+static void restore_cur(void)
+{
+	gotoxy(saved_x, saved_y);
+}
+
+void con_write(struct tty_struct * tty)
+{
+	int nr;
+	char c;
+
+	nr = CHARS(tty->write_q);
+	while (nr--) {
+		GETCH(tty->write_q,c);
+		switch(state) {
+			case 0:
+				if (c>31 && c<127) {
+					if (x>=video_num_columns) {
+						x -= video_num_columns;
+						pos -= video_size_row;
+						lf();
+					}
+					__asm__("movb attr,%%ah\n\t"
+						"movw %%ax,%1\n\t"
+						::"a" (c),"m" (*(short *)pos)
+						);
+					pos += 2;
+					x++;
+				} else if (c==27)
+					state=1;
+				else if (c==10 || c==11 || c==12)
+					lf();
+				else if (c==13)
+					cr();
+				else if (c==ERASE_CHAR(tty))
+					del();
+				else if (c==8) {
+					if (x) {
+						x--;
+						pos -= 2;
+					}
+				} else if (c==9) {
+					c=8-(x&7);
+					x += c;
+					pos += c<<1;
+					if (x>video_num_columns) {
+						x -= video_num_columns;
+						pos -= video_size_row;
+						lf();
+					}
+					c=9;
+				} else if (c==7)
+					sysbeep();
+				break;
+			case 1:
+				state=0;
+				if (c=='[')
+					state=2;
+				else if (c=='E')
+					gotoxy(0,y+1);
+				else if (c=='M')
+					ri();
+				else if (c=='D')
+					lf();
+				else if (c=='Z')
+					respond(tty);
+				else if (x=='7')
+					save_cur();
+				else if (x=='8')
+					restore_cur();
+				break;
+			case 2:
+				for(npar=0;npar<NPAR;npar++)
+					par[npar]=0;
+				npar=0;
+				state=3;
+				if (ques=(c=='?'))
+					break;
+			case 3:
+				if (c==';' && npar<NPAR-1) {
+					npar++;
+					break;
+				} else if (c>='0' && c<='9') {
+					par[npar]=10*par[npar]+c-'0';
+					break;
+				} else state=4;
+			case 4:
+				state=0;
+				switch(c) {
+					case 'G': case '`':
+						if (par[0]) par[0]--;
+						gotoxy(par[0],y);
+						break;
+					case 'A':
+						if (!par[0]) par[0]++;
+						gotoxy(x,y-par[0]);
+						break;
+					case 'B': case 'e':
+						if (!par[0]) par[0]++;
+						gotoxy(x,y+par[0]);
+						break;
+					case 'C': case 'a':
+						if (!par[0]) par[0]++;
+						gotoxy(x+par[0],y);
+						break;
+					case 'D':
+						if (!par[0]) par[0]++;
+						gotoxy(x-par[0],y);
+						break;
+					case 'E':
+						if (!par[0]) par[0]++;
+						gotoxy(0,y+par[0]);
+						break;
+					case 'F':
+						if (!par[0]) par[0]++;
+						gotoxy(0,y-par[0]);
+						break;
+					case 'd':
+						if (par[0]) par[0]--;
+						gotoxy(x,par[0]);
+						break;
+					case 'H': case 'f':
+						if (par[0]) par[0]--;
+						if (par[1]) par[1]--;
+						gotoxy(par[1],par[0]);
+						break;
+					case 'J':
+						csi_J(par[0]);
+						break;
+					case 'K':
+						csi_K(par[0]);
+						break;
+					case 'L':
+						csi_L(par[0]);
+						break;
+					case 'M':
+						csi_M(par[0]);
+						break;
+					case 'P':
+						csi_P(par[0]);
+						break;
+					case '@':
+						csi_at(par[0]);
+						break;
+					case 'm':
+						csi_m();
+						break;
+					case 'r':
+						if (par[0]) par[0]--;
+						if (!par[1]) par[1] = video_num_lines;
+						if (par[0] < par[1] &&
+						    par[1] <= video_num_lines) {
+							top=par[0];
+							bottom=par[1];
+						}
+						break;
+					case 's':
+						save_cur();
+						break;
+					case 'u':
+						restore_cur();
+						break;
+				}
+		}
+	}
+	set_cursor();
+}
+
+/*
+ *  void con_init(void);
+ *
+ * This routine initalizes console interrupts, and does nothing
+ * else. If you want the screen to clear, call tty_write with
+ * the appropriate escape-sequece.
+ *
+ * Reads the information preserved by setup.s to determine the current display
+ * type and sets everything accordingly.
+ */
+void con_init(void)
+{
+	register unsigned char a;
+	char *display_desc = "????";
+	char *display_ptr;
+
+	video_num_columns = ORIG_VIDEO_COLS;
+	video_size_row = video_num_columns * 2;
+	video_num_lines = ORIG_VIDEO_LINES;
+	video_page = ORIG_VIDEO_PAGE;
+	video_erase_char = 0x0720;
+	
+	if (ORIG_VIDEO_MODE == 7)			/* Is this a monochrome display? */
+	{
+		video_mem_start = 0xb0000;
+		video_port_reg = 0x3b4;
+		video_port_val = 0x3b5;
+		if ((ORIG_VIDEO_EGA_BX & 0xff) != 0x10)
+		{
+			video_type = VIDEO_TYPE_EGAM;
+			video_mem_end = 0xb8000;
+			display_desc = "EGAm";
+		}
+		else
+		{
+			video_type = VIDEO_TYPE_MDA;
+			video_mem_end	= 0xb2000;
+			display_desc = "*MDA";
+		}
+	}
+	else								/* If not, it is color. */
+	{
+		video_mem_start = 0xb8000;
+		video_port_reg	= 0x3d4;
+		video_port_val	= 0x3d5;
+		if ((ORIG_VIDEO_EGA_BX & 0xff) != 0x10)
+		{
+			video_type = VIDEO_TYPE_EGAC;
+			video_mem_end = 0xbc000;
+			display_desc = "EGAc";
+		}
+		else
+		{
+			video_type = VIDEO_TYPE_CGA;
+			video_mem_end = 0xba000;
+			display_desc = "*CGA";
+		}
+	}
+
+	/* Let the user known what kind of display driver we are using */
+	
+	display_ptr = ((char *)video_mem_start) + video_size_row - 8;
+	while (*display_desc)
+	{
+		*display_ptr++ = *display_desc++;
+		display_ptr++;
+	}
+	
+	/* Initialize the variables used for scrolling (mostly EGA/VGA)	*/
+	
+	origin	= video_mem_start;
+	scr_end	= video_mem_start + video_num_lines * video_size_row;
+	top	= 0;
+	bottom	= video_num_lines;
+
+	gotoxy(ORIG_X,ORIG_Y);
+
+	outb_p(0xA8,0x64); //允许鼠标操作
+	/*
+	Each time set the parameters of the mouse, 
+	must indicate to the 0x64 to 
+	whom the command is given
+	*/
+	
+	outb_p(0xD4,0x64); //给 0x64 端口发送 0xD4，表示接下来给 0x60 的命令是给鼠标的
+	outb_p(0xFF,0x60);// reset mouse type to 2 dimension 
+
+	outb_p(0xD4,0x64); //给 0x64 端口发送 0xD4，表示接下来给 0x60 的命令是给鼠标的
+	outb_p(0xF4,0x60); //设置鼠标，允许鼠标向主机自动发送数据包
+
+	outb_p(0x60,0x64); //给 0x64 端口发送 0x60，表示接下来给 0x60 的命令是给 i8042 的
+	outb_p(0x47,0x60); //设置 i8042 寄存器，允许鼠标接口及其中断
+	
+	set_trap_gate(0x21,&keyboard_interrupt);
+	set_trap_gate(0x2c,&mouse_interrupt);//set the mouse interrupt
+
+	//解除屏蔽
+	outb_p(inb_p(0x21)&0xF9,0x21);
+	outb_p(inb_p(0xA1)&0xEF,0xA1);
+	a=inb_p(0x61);
+	outb_p(a|0x80,0x61);
+	outb(a,0x61);
+}
+/* from bsd-net-2: */
+
+void sysbeepstop(void)
+{
+	/* disable counter 2 */
+	outb(inb_p(0x61)&0xFC, 0x61);
+}
+
+int beepcount = 0;
+
+static void sysbeep(void)
+{
+	/* enable counter 2 */
+	outb_p(inb_p(0x61)|3, 0x61);
+	/* set command for counter 2, 2 byte write */
+	outb_p(0xB6, 0x43);
+	/* send 0x637 for 750 HZ */
+	outb_p(0x37, 0x42);
+	outb(0x06, 0x42);
+	/* 1/8 second */
+	beepcount = HZ/8;	
+}