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Fixed colour compare in EGA/VGA - fixes graphics issues in Crystal Dream II.

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This commit is contained in:
SarahW 2017-08-31 14:26:54 +01:00
commit b1f4748eaf
2 changed files with 24 additions and 24 deletions
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16
src/vid_ega.c
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@ -860,18 +860,18 @@ uint8_t ega_read(uint32_t addr, void *p)
ega->ld = ega->vram[addr | 0x3];
if (ega->readmode)
{
temp = (ega->colournocare & 1) ? 0xff : 0;
temp &= ega->la;
temp = ega->la;
temp ^= (ega->colourcompare & 1) ? 0xff : 0;
temp2 = (ega->colournocare & 2) ? 0xff : 0;
temp2 &= ega->lb;
temp &= (ega->colournocare & 1) ? 0xff : 0;
temp2 = ega->lb;
temp2 ^= (ega->colourcompare & 2) ? 0xff : 0;
temp3 = (ega->colournocare & 4) ? 0xff : 0;
temp3 &= ega->lc;
temp2 &= (ega->colournocare & 2) ? 0xff : 0;
temp3 = ega->lc;
temp3 ^= (ega->colourcompare & 4) ? 0xff : 0;
temp4 = (ega->colournocare & 8) ? 0xff : 0;
temp4 &= ega->ld;
temp3 &= (ega->colournocare & 4) ? 0xff : 0;
temp4 = ega->ld;
temp4 ^= (ega->colourcompare & 8) ? 0xff : 0;
temp4 &= (ega->colournocare & 8) ? 0xff : 0;
return ~(temp | temp2 | temp3 | temp4);
}
return ega->vram[addr | readplane];