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Rework video memory handling to cater for open bus and VRAM address wrapping. Fixes more hangs with Trio64 and Windows 95.

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This commit is contained in:
SarahW 2017-10-22 12:41:10 +01:00
commit 39a68d757b
10 changed files with 174 additions and 117 deletions
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4
src/vid_oti067.c
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@ -65,13 +65,13 @@ void oti067_out(uint16_t addr, uint8_t val, void *p)
switch (oti067->index)
{
case 0xD:
svga->vrammask = (val & 0xc) ? oti067->vram_mask : 0x3ffff;
svga->vram_display_mask = (val & 0xc) ? oti067->vram_mask : 0x3ffff;
if ((val & 0x80) && oti067->vram_size == 256)
mem_mapping_disable(&svga->mapping);
else
mem_mapping_enable(&svga->mapping);
if (!(val & 0x80))
svga->vrammask = 0x3ffff;
svga->vram_display_mask = 0x3ffff;
break;
case 0x11:
svga->read_bank = (val & 0xf) * 65536;