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Applied the blanking extensions to S3 Trio64V+ and V2/DX.

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This commit is contained in:
OBattler
2024-01-10 09:27:07 +01:00
parent 0a8b4d061c
commit d125caf776
1 changed files with 19 additions and 1 deletions
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20
src/video/vid_s3.c
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@@ -4018,7 +4018,7 @@ s3_trio64v_recalctimings(svga_t *svga)
svga->htotal |= 0x100;
if (svga->crtc[0x5d] & 0x02) {
svga->hdisp_time |= 0x100;
svga->hdisp |= 0x100 * ((svga->seqregs[1] & 8) ? 16 : 8);
svga->hdisp |= 0x100 * svga->dots_per_clock;
}
if (svga->crtc[0x5e] & 0x01)
svga->vtotal |= 0x400;
@@ -4146,6 +4146,24 @@ s3_trio64v_recalctimings(svga_t *svga)
break;
}
}
if (!svga->scrblank && svga->attr_palette_enable && (svga->crtc[0x43] & 0x80)) {
/* TODO: In case of bug reports, disable 9-dots-wide character clocks in graphics modes. */
svga->dots_per_clock = ((svga->seqregs[1] & 1) ? 16 : 18);
}
if (svga->crtc[0x5d] & 0x04)
svga->hblankstart += 0x100;
/* NOTE: The S3 Trio64V+ datasheet says this is bit 7, but then where is bit 6?
The datasheets for the pre-Trio64V+ cards say +64, which implies bit 6,
and, contrary to VGADOC, it also exists on Trio32, Trio64, Vision868,
and Vision968. */
if (svga->crtc[0x5d] & 0x08)
svga->hblank_ext = 0x40;
svga->hblank_end_len = 0x00000040;
svga->hblank_overscan = !(svga->crtc[0x33] & 0x20);
}
static void