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

2024-01-13 00:41:45 +01:00
parent 38ef7fa1c3
commit ca4f5bad13
10 changed files with 76 additions and 39 deletions
--- a/src/video/vid_ati_mach8.c
+++ b/src/video/vid_ati_mach8.c
@@ -2843,7 +2843,7 @@ mach_recalctimings(svga_t *svga)
    }

    if (mach->regs[0xad] & 0x08)
-        svga->hblankstart    = ((mach->regs[0x0d] >> 2) << 8) + svga->crtc[4] + 1;
+        svga->hblankstart    = ((mach->regs[0x0d] >> 2) << 8) + svga->crtc[2] + 1;
 }

 static void