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40x25 text mode and Cardex ET4000/w32p 80x25 text mode now actually fixes.

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This commit is contained in:
OBattler
2020-12-20 21:14:24 +01:00
parent 66e2b9bc1b
commit da1de8aaf5
2 changed files with 15 additions and 3 deletions
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7
src/video/vid_svga.c
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@@ -445,7 +445,7 @@ svga_recalctimings(svga_t *svga)
svga->interlace = 0;
svga->ma_latch = ((svga->crtc[0xc] << 8) | svga->crtc[0xd]);
svga->ma_latch = ((svga->crtc[0xc] << 8) | svga->crtc[0xd]) + ((svga->crtc[8] & 0x60) >> 5);
svga->ca_adj = 0;
svga->rowcount = svga->crtc[9] & 31;
@@ -457,10 +457,11 @@ svga_recalctimings(svga_t *svga)
if (svga->seqregs[1] & 8) /*40 column*/ {
svga->render = svga_render_text_40;
svga->hdisp *= (svga->seqregs[1] & 1) ? 16 : 18;
/* Character clock is off by 1 now in 40-line modes, on all cards. */
svga->ma_latch--;
svga->hdisp += (svga->seqregs[1] & 1) ? 16 : 18;
} else {
svga->render = svga_render_text_80;
if (!(svga->adv_flags & FLAG_NOSKEW))
svga->ma_latch += ((svga->crtc[8] & 0x60) >> 5);
svga->hdisp *= (svga->seqregs[1] & 1) ? 8 : 9;
}
svga->hdisp_old = svga->hdisp;