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Cleared svga->fast when appropriate so that word writes can be executed right, fixes graphical glitches under Win95 using the 5422/5424.

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TC1995
2021-06-17 19:07:51 +02:00
parent 6b1773f4bb
commit dd8559f851
1 changed files with 6 additions and 2 deletions
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8
src/video/vid_cl54xx.c
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@@ -880,8 +880,12 @@ gd54xx_out(uint16_t addr, uint8_t val, void *p)
break;
}
svga->fast = (svga->gdcreg[8] == 0xff && !(svga->gdcreg[3] & 0x18) &&
!svga->gdcreg[1]) && ((svga->chain4 && svga->packed_chain4) || svga->fb_only);
if ((svga->crtc[0x27] == CIRRUS_ID_CLGD5422) || (svga->crtc[0x27] == CIRRUS_ID_CLGD5424))
svga->fast = (svga->gdcreg[8] == 0xff && !(svga->gdcreg[3] & 0x18) &&
!svga->gdcreg[1]) && ((svga->chain4 && svga->packed_chain4) || svga->fb_only) && !(svga->adv_flags & FLAG_ADDR_BY8); /*TODO: needs verification on other Cirrus chips*/
else
svga->fast = (svga->gdcreg[8] == 0xff && !(svga->gdcreg[3] & 0x18) &&
!svga->gdcreg[1]) && ((svga->chain4 && svga->packed_chain4) || svga->fb_only);
if (((svga->gdcaddr == 5) && ((val ^ o) & 0x70)) ||
((svga->gdcaddr == 6) && ((val ^ o) & 1)))
svga_recalctimings(svga);