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Fixed horizontal retrace start and end extensions on almost every applicable card, fixes #4025.

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OBattler
2024-01-11 14:42:54 +01:00
parent 2afbe3b8a4
commit cd0636ee04
6 changed files with 56 additions and 59 deletions
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9
src/video/vid_mga.c
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@@ -943,8 +943,9 @@ mystique_recalctimings(svga_t *svga)
if (mystique->crtcext_regs[1] & CRTCX_R1_HTOTAL8)
svga->htotal |= 0x100;
if (mystique->crtcext_regs[1] & CRTCX_R1_HBLKSTRT8)
svga->hblankstart += 0x100;
svga->hblankstart = (((mystique->crtcext_regs[1] & 0x04) >> 2) << 8) + svga->crtc[4] + 1;
if (mystique->crtcext_regs[2] & CRTCX_R2_VTOTAL10)
svga->vtotal |= 0x400;
if (mystique->crtcext_regs[2] & CRTCX_R2_VTOTAL11)
@@ -975,8 +976,8 @@ mystique_recalctimings(svga_t *svga)
svga->hdisp_time = svga->hdisp;
svga->rowoffset = svga->crtc[0x13] | ((mystique->crtcext_regs[0] & CRTCX_R0_OFFSET_MASK) << 4);
svga->hblank_end_len = 0x80;
svga->hblank_end_val += mystique->crtcext_regs[1] & CRTCX_R1_HBLKEND6;
svga->hblank_end_val = (mystique->crtcext_regs[1] & 0x40) | (svga->crtc[3] & 0x1f) |
((svga->crtc[5] & 0x80) ? 0x20 : 0x00);
svga->hblank_overscan = 0;