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106 lines
1.9 KiB
106 lines
1.9 KiB
#include <linux/kernel.h>
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#include<asm/io.h>
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#include "linux/tty.h"
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#define memstart 0xA0000
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#define memsize 64000
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#define cursor_side 3
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#define width 320
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#define height 200
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#define barrier_width 10
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struct message *headd;
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static int ff=0;
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int sys_init_graphics()
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{
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int i,j,x,y;
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char *p=0xA0000;
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if(ff==0)
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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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ff=1;
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}
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p=memstart;
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for(i=0;i<memsize;i++) *p++=3;
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//3-blue 4-red 12-purple
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x=50;
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y=40;
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for(i=x-cursor_side;i<=x+cursor_side;i++)
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for(j=y-cursor_side;j<=y+cursor_side;j++){
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p=(char *) memstart+j*width+i;
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*p=12;
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}
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return 0;
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}
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int sys_get_message(struct message * msg)
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{
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msg=headd;
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if(headd->mid!=1)return 0;
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headd=headd->next;
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return 0;
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}
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int sys_repaint(int x,int y,int h)
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{
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int i,j,w;
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char *p;
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i=x;
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j=y;
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p=0xA0000;
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w=barrier_width;
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if(i+w>=320 || i<20 ) return 0;
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if(i==33 || j==33){
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p=0xA0000;
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for(i=0;i<memsize;i++) *p++=3;
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return 0;
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}
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else if(i==44 || j==44 ){
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p=0xA0000;
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for(i=0;i<memsize;i++) *p++=4;
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return 0;
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}else{
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for(i=x;i<=x+w;i++){
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for(j=y;j<=y+h;j++){
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p=0xA0000+j*320+i;
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*p=12;
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}
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}
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}
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return 0;
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}
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