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Rework video memory handling to cater for open bus and VRAM address wrapping. Fixes more hangs with Trio64 and Windows 95.

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This commit is contained in:
SarahW 2017-10-22 12:41:10 +01:00
commit 39a68d757b
10 changed files with 174 additions and 117 deletions
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6
src/vid_s3_virge.c
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@ -370,7 +370,7 @@ static void s3_virge_out(uint16_t addr, uint8_t val, void *p)
break;
case 0x32:
if ((svga->crtc[0x67] & 0xc) != 0xc)
svga->vrammask = (val & 0x40) ? 0x3ffff : ((virge->memory_size << 20) - 1);
svga->vram_display_mask = (val & 0x40) ? 0x3ffff : ((virge->memory_size << 20) - 1);
s3_virge_update_irqs(virge);
break;
@ -583,7 +583,7 @@ static void s3_virge_recalctimings(svga_t *svga)
{
svga->rowoffset = (svga->rowoffset * 3) / 4; /*Hack*/
}
svga->vrammask = (svga->crtc[0x32] & 0x40) ? 0x3ffff : ((virge->memory_size << 20) - 1);
svga->vram_display_mask = (svga->crtc[0x32] & 0x40) ? 0x3ffff : ((virge->memory_size << 20) - 1);
//pclog("VGA mode x_disp=%i dispend=%i vtotal=%i\n", svga->hdisp, svga->dispend, svga->vtotal);
}
else /*Streams mode*/
@ -631,7 +631,7 @@ static void s3_virge_recalctimings(svga_t *svga)
svga->render = svga_render_32bpp_highres;
break;
}
svga->vrammask = (virge->memory_size << 20) - 1;
svga->vram_display_mask = (virge->memory_size << 20) - 1;
}
if (((svga->miscout >> 2) & 3) == 3)