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Fixed odd/even mode on CL-GD5429.

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This commit is contained in:
SarahW 2018-02-14 18:44:55 +00:00
commit 25eb84284f
1 changed files with 10 additions and 1 deletions
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11
src/vid_cl5429.c
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@ -107,6 +107,7 @@ void gd5429_out(uint16_t addr, uint8_t val, void *p)
else
svga->writemode = svga->gdcreg[5] & 3;
svga->readmode = val & 8;
svga->chain2_read = val & 0x10;
// pclog("writemode = %i\n", svga->writemode);
return;
}
@ -341,11 +342,19 @@ void gd5429_write_linear(uint32_t addr, uint8_t val, void *p)
// if (svga_output) pclog("Write LFB %08X %02X ", addr, val);
if (!(svga->gdcreg[6] & 1))
svga->fullchange = 2;
if (svga->chain4 && (svga->writemode < 4))
if ((svga->chain4 || svga->fb_only) && (svga->writemode < 4))
{
writemask2 = 1 << (addr & 3);
addr &= ~3;
}
else if (svga->chain2_write)
{
writemask2 &= ~0xa;
if (addr & 1)
writemask2 <<= 1;
addr &= ~1;
addr <<= 2;
}
else
{
addr <<= 2;