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Load VGA latches even on 'fast' chained mode byte reads. Fixes missing

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This commit is contained in:
SarahW 2020-11-22 12:48:24 +00:00
commit d4dc2e9441
1 changed files with 6 additions and 2 deletions
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8
src/vid_svga.c
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@ -996,7 +996,7 @@ uint8_t svga_read(uint32_t addr, void *p)
cycles -= video_timing_read_b;
cycles_lost += video_timing_read_b;
egareads++;
// pclog("Readega %06X ",addr);
@ -1012,6 +1012,11 @@ uint8_t svga_read(uint32_t addr, void *p)
addr &= svga->decode_mask;
if (addr >= svga->vram_max)
return 0xff;
latch_addr = addr & svga->vram_mask & ~3;
svga->la = svga->vram[latch_addr];
svga->lb = svga->vram[latch_addr | 0x1];
svga->lc = svga->vram[latch_addr | 0x2];
svga->ld = svga->vram[latch_addr | 0x3];
return svga->vram[addr & svga->vram_mask];
}
else if (svga->chain2_read)
@ -1060,7 +1065,6 @@ uint8_t svga_read(uint32_t addr, void *p)
return ~(temp | temp2 | temp3 | temp4);
}
//pclog("Read %02X %04X %04X\n",vram[addr|svga->readplane],addr,svga->readplane);
return svga->vram[addr | readplane];
}