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C&T 69000: Make sure horizontal blank period does not exceed horizontal total

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Fixes machine freezes in certain circumstances
This commit is contained in:
Cacodemon345
2024-02-18 16:35:32 +06:00
parent 4adb484184
commit 2928e2cf79
1 changed files with 3 additions and 0 deletions
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3
src/video/vid_chips_69000.c
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@@ -775,6 +775,9 @@ chips_69000_recalctimings(svga_t *svga)
svga->hblank_end_val = ((svga->crtc[3] & 0x1f) | ((svga->crtc[5] & 0x80) ? 0x20 : 0x00)) | (svga->crtc[0x3c] & 0b11000000);
svga->hblank_end_mask = 0xff;
if (svga->hblank_end_val >= svga->htotal)
svga->hblank_end_val = svga->htotal - 1;
svga->ma_latch |= (svga->crtc[0x40] & 0xF) << 16;
svga->rowoffset |= (svga->crtc[0x41] & 0xF) << 8;