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75 lines
1.7 KiB
75 lines
1.7 KiB
2 years ago
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#include <linux/kernel.h>
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#include <asm/io.h>
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#include <all.h>
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#include <asm/segment.h>
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#define vga_graph_memstart 0xA0000
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#define vga_graph_memsize 64000
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#define cursor_side 6
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#define vga_width 320
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#define vga_heignt 200
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int volatile jumpp;
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int sys_init_graphics()
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{
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outb(0x05,0x3CE);
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outb(0x40,0x3CF);/* shift256=1*/
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outb(0x06,0x3CE);
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outb(0x05,0x3CF);/*0101 0xA0000*/
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outb(0x04,0x3C4);
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outb(0x08,0x3C5);/*0000 jilian*/
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outb(0x01,0x3D4);
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outb(0x4F,0x3D5);/* end horizontal display=79 ??*/
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outb(0x03,0x3D4);
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outb(0x82,0x3D5);/*display enable skew=0*/
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outb(0x07,0x3D4);
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outb(0x1F,0x3D5);/*vertical display end No8,9 bit=1,0*/
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outb(0x12,0x3D4);
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outb(0x8F,0x3D5);/*vertical display end low 7b =0x8F*/
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outb(0x17,0x3D4);
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outb(0xA3,0x3D5);/*SLDIV=1 ,scanline clock/2*/
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outb(0x14,0x3D4);
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outb(0x40,0x3D5);/*DW=1*/
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outb(0x13,0x3D4);
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outb(0x28,0x3D5);/*Offset=40, 20:become long*/
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outb(0x0C,0x3D4);/**/
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outb(0x00,0x3D5);/**/
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outb(0x0D,0x3D4);/**/
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outb(0x00,0x3D5);/*Start Address=0xA0000*/
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int i;
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char * p;
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p = (char *)vga_graph_memstart;
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for (i = 0; i < vga_graph_memsize; ++i)
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*p++ = 7;
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return 0;
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}
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int sys_repaint(struct pho * pho)
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{
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int i, j;
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char * p;
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long color = get_fs_long(&pho->color);
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long x = get_fs_long(&pho->x);
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long y = get_fs_long(&pho->y);
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long dx = get_fs_long(&pho->dx);
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long dy = get_fs_long(&pho->dy);
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for (i = x; i < x+dx; ++i) if (0 <= i && i < vga_width)
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for (j = y; j < y+dy; ++j) if (0 <= j && j < vga_heignt){
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p = (char *)vga_graph_memstart + vga_width*j + i;
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*p = 10;
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}
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return 0;
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}
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