89 lines
1.6 KiB
C
89 lines
1.6 KiB
C
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#include "vga.h"
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#include "string.h"
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#include "asm.h"
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#include "modes.c"
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#include "8x8fnt.c"
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#define sequencer 0x3c4
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#define misc 0x3c2
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#define ccrt 0x3D4
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#define attribs 0x3c0
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#define graphics 0x3ce
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#define state 0x3da
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static u16 resX,resY,cursX,cursY; /* resolution x,y en caract<63>res et position du curseur */
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static u16 pages,pagesize,activepage; /* nombre de pages disponibles et taille d'une page */
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static u8 vmode; /* mode en cours d'utilisation */
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static u16 basemem; /* debut de la m<>moire vid<69>o */
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static bool scrolling,graphic; /* Activation du d<>filement, Flag du mode graphique */
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void print (u8* string)
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{
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u8 *source,*screen;
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source = string;
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screen = (u8 *)TEXTSCREEN;
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while(*source!=0x00)
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{
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*screen = *source;
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screen+=2;
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source++;
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}
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}
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void cls (void)
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{
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memset((u8 *)TEXTSCREEN,0x20,(80*25*2),2);
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}
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u16 setvmode(u8 choosedmode)
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{
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u8 *def,i,mode;
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mode=choosedmode&0x7F;
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if (choosedmode>0x7F)
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{
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if (mode>maxgraphmode) return 1; /* mode inexistant */
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def=(u8 *)&graphmodes[mode];
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graphic=true;
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}
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else
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{
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if (mode>maxtextmode) return 1; /* mode inexistant */
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def=(u8 *)&textmodes[mode];
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graphic=false;
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}
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outb(misc,*def++);
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outb(state,*def++);
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for(i=0;i<5;i++)
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{
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outb(sequencer,i);
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outb(sequencer+1,*def++);
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}
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outb(ccrt,0x11);
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outb(ccrt+1,0x0E);
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for(i=0;i<25;i++)
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{
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outb(ccrt,i);
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outb(ccrt+1,*def++);
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}
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for(i=0;i<9;i++)
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{
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outb(graphics,i);
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outb(graphics+1,*def++);
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}
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inb(state);
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for(i=0;i<21;i++)
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{
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inb(attribs);
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outb(attribs,i);
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outb(attribs,*def++);
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}
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inb(state);
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outb(attribs,0x20);
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return 0;
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}
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