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More horizontal blanking calculation fixes (and actually use blank start, not retrace start), fixes graphics cut-off on Voodoo on Windows 98 SE.

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OBattler
2024-01-13 00:41:45 +01:00
parent 38ef7fa1c3
commit ca4f5bad13
10 changed files with 76 additions and 39 deletions
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4
src/video/vid_mga.c
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@@ -944,7 +944,9 @@ mystique_recalctimings(svga_t *svga)
if (mystique->crtcext_regs[1] & CRTCX_R1_HTOTAL8)
svga->htotal |= 0x100;
svga->hblankstart = (((mystique->crtcext_regs[1] & 0x04) >> 2) << 8) + svga->crtc[4] + 1;
svga->hblankstart = (((mystique->crtcext_regs[1] & 0x02) >> 2) << 8) + svga->crtc[2] + 1;
svga->hblank_end_val = (svga->crtc[3] & 0x1f) | (((svga->crtc[5] & 0x80) >> 7) << 5) |
(((mystique->crtcext_regs[1] & 0x40) >> 6) << 6);
if (mystique->crtcext_regs[2] & CRTCX_R2_VTOTAL10)
svga->vtotal |= 0x400;