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_ati28800.c
+++ b/src/video/vid_ati28800.c
@@ -503,7 +503,7 @@ ati28800_recalctimings(svga_t *svga)
    }

    if (ati28800->regs[0xad] & 0x08)
-        svga->hblankstart    = ((ati28800->regs[0x0d] >> 2) << 8) + svga->crtc[4] + 1;
+        svga->hblankstart    = ((ati28800->regs[0x0d] >> 2) << 8) + svga->crtc[2] + 1;
 }

 static void