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CL-GD 54xx: Actually use display start and end for horizontal blanking timings in the special blanking mode.

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OBattler
2024-01-12 23:20:01 +01:00
parent d2674c8dbb
commit 38ef7fa1c3
1 changed files with 3 additions and 0 deletions
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src/video/vid_cl54xx.c
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@@ -1956,6 +1956,9 @@ gd54xx_recalctimings(svga_t *svga)
(((svga->crtc[0x1a] >> 4) & 3) << 6);
if (svga->crtc[0x1b] & 0x20) {
svga->hblankstart = svga->crtc[1] + ((svga->crtc[3] >> 5) & 3) + 1;
svga->hblank_end_val = ((svga->crtc[3] >> 5) & 3);
/* In this mode, the dots per clock are always 8 or 16, never 9 or 18. */
if (!svga->scrblank && svga->attr_palette_enable)
svga->dots_per_clock = (svga->seqregs[1] & 8) ? 16 : 8;