Retro/pcem
Watch
1
0
Fork
You've already forked pcem
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Implement PS/2 DMA status register - fixes OS/2 v1.3 on PS/2 machines.

Browse source
This commit is contained in:
SarahW 2017-12-07 22:26:57 +00:00
commit a8e72802a1
1 changed files with 20 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

21
src/dma.c
View file

@ -165,6 +165,21 @@ static uint8_t dma_ps2_read(uint16_t addr, void *priv)
temp = (dma.xfr_channel & 4) ? (dma16.cc[dma.xfr_channel & 3] & 0xff) : (dma.cc[dma.xfr_channel] & 0xff);
dma.byte_ptr = (dma.byte_ptr + 1) & 1;
break;
case 6: /*Read DMA status*/
if (dma.byte_ptr)
{
temp = dma16.stat_rq | (dma16.stat << 4);
dma16.stat = 0;
dma16.stat_rq = 0;
}
else
{
temp = dma.stat_rq | (dma.stat << 4);
dma.stat = 0;
dma.stat_rq = 0;
}
dma.byte_ptr = (dma.byte_ptr + 1) & 1;
break;
case 7: /*Mode*/
temp = (dma.xfr_channel & 4) ? dma16.ps2_mode[dma.xfr_channel & 3] : dma.ps2_mode[dma.xfr_channel];
break;
@ -505,6 +520,7 @@ int dma_channel_read(int channel)
return DMA_NODATA;
temp = _dma_read(dma.ac[channel]);
dma.stat_rq |= (1 << channel);
if (dma.mode[channel] & 0x20)
{
@ -548,6 +564,7 @@ int dma_channel_read(int channel)
temp = _dma_read(dma16.ac[channel]) |
(_dma_read(dma16.ac[channel] + 1) << 8);
dma16.stat_rq |= (1 << channel);
if (dma16.mode[channel] & 0x20)
{
@ -600,7 +617,8 @@ int dma_channel_write(int channel, uint16_t val)
return DMA_NODATA;
_dma_write(dma.ac[channel], val);
dma.stat_rq |= (1 << channel);
if (dma.mode[channel] & 0x20)
{
if (dma.is_ps2)
@ -642,6 +660,7 @@ int dma_channel_write(int channel, uint16_t val)
_dma_write(dma16.ac[channel], val);
_dma_write(dma16.ac[channel] + 1, val >> 8);
dma16.stat_rq |= (1 << channel);
if (dma16.mode[channel] & 0x20)
{