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Fixed VGA character set selection (bad documentation). Fixes Impulse Tracker.

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This commit is contained in:
TomW 2014-03-05 19:51:23 +00:00
commit f030e72816
2 changed files with 9 additions and 5 deletions
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4
src/vid_ega.c
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@ -73,8 +73,8 @@ void ega_out(uint16_t addr, uint8_t val, void *p)
ega->writemask = val & 0xf;
break;
case 3:
ega->charseta = (((val >> 2) & 3) * 0x10000) + 2;
ega->charsetb = ((val & 3) * 0x10000) + 2;
ega->charsetb = (((val >> 2) & 3) * 0x10000) + 2;
ega->charseta = ((val & 3) * 0x10000) + 2;
break;
}
break;

10
src/vid_svga.c
View file

@ -23,7 +23,7 @@ void svga_out(uint16_t addr, uint8_t val, void *p)
svga_t *svga = (svga_t *)p;
int c;
uint8_t o;
// printf("OUT SVGA %03X %02X %04X:%04X %i %08X\n",addr,val,CS,pc,TRIDENT,svgawbank);
// printf("OUT SVGA %03X %02X %04X:%04X\n",addr,val,CS,pc);
switch (addr)
{
case 0x3C0:
@ -88,8 +88,12 @@ void svga_out(uint16_t addr, uint8_t val, void *p)
svga->writemask = val & 0xf;
break;
case 3:
svga->charseta = (((val >> 2) & 3) * 0x10000) + 2;
svga->charsetb = ((val & 3) * 0x10000) + 2;
svga->charsetb = (((val >> 2) & 3) * 0x10000) + 2;
svga->charseta = ((val & 3) * 0x10000) + 2;
if (val & 0x10)
svga->charseta += 0x8000;
if (val & 0x20)
svga->charsetb += 0x8000;
break;
case 4:
svga->chain4 = val & 8;