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Add S3 Enhanced Mode Mappings address override. Fixes some hangs with Trio64 and Windows 95.

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This commit is contained in:
SarahW 2017-10-22 12:40:09 +01:00
commit da6e537b31
1 changed files with 8 additions and 1 deletions
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9
src/vid_s3.c
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@ -1034,7 +1034,14 @@ void s3_updatemapping(s3_t *s3)
} }
// pclog("Update mapping - bank %02X ", svga->gdcreg[6] & 0xc); // pclog("Update mapping - bank %02X ", svga->gdcreg[6] & 0xc);
switch (svga->gdcreg[6] & 0xc) /*Banked framebuffer*/ /*Banked framebuffer*/
if (svga->crtc[0x31] & 0x08) /*Enhanced mode mappings*/
{
/*Enhanced mapping forces 64kb at 0xa0000*/
mem_mapping_set_addr(&svga->mapping, 0xa0000, 0x10000);
svga->banked_mask = 0xffff;
}
else switch (svga->gdcreg[6] & 0xc) /*VGA mapping*/
{ {
case 0x0: /*128k at A0000*/ case 0x0: /*128k at A0000*/
mem_mapping_set_addr(&svga->mapping, 0xa0000, 0x20000); mem_mapping_set_addr(&svga->mapping, 0xa0000, 0x20000);