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Fixed stupid bug in DMA length handling - should fix sound clicking on some games.

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This commit is contained in:
TomW 2013-12-19 18:17:37 +00:00
commit d83683c6db
1 changed files with 31 additions and 32 deletions
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63
src/dma.c
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@ -267,15 +267,15 @@ int dma_channel_read(int channel)
if (dma.mode[channel] & 0x20) dma.ac[channel]--;
else dma.ac[channel]++;
dma.cc[channel]--;
if (!dma.cc[channel] && (dma.mode[channel] & 0x10))
if (dma.cc[channel] < 0)
{
dma.cc[channel] = dma.cb[channel] + 1;
dma.ac[channel] = dma.ab[channel];
dma.stat |= (1 << channel);
}
else if (dma.cc[channel]<=-1)
{
dma.m |= (1 << channel);
if (dma.mode[channel] & 0x10) /*Auto-init*/
{
dma.cc[channel] = dma.cb[channel];
dma.ac[channel] = dma.ab[channel];
}
else
dma.m |= (1 << channel);
dma.stat |= (1 << channel);
}
@ -297,15 +297,15 @@ int dma_channel_read(int channel)
if (dma16.mode[channel] & 0x20) dma16.ac[channel]--;
else dma16.ac[channel]++;
dma16.cc[channel]--;
if (!dma16.cc[channel] && (dma16.mode[channel] & 0x10))
if (dma16.cc[channel] < 0)
{
dma16.cc[channel] = dma16.cb[channel] + 1;
dma16.ac[channel] = dma16.ab[channel];
dma16.stat |= (1 << channel);
}
else if (dma16.cc[channel] <= -1)
{
dma16.m |= (1 << channel);
if (dma16.mode[channel] & 0x10) /*Auto-init*/
{
dma16.cc[channel] = dma16.cb[channel];
dma16.ac[channel] = dma16.ab[channel];
}
else
dma16.m |= (1 << channel);
dma16.stat |= (1 << channel);
}
@ -332,15 +332,15 @@ int dma_channel_write(int channel, uint16_t val)
if (dma.mode[channel]&0x20) dma.ac[channel]--;
else dma.ac[channel]++;
dma.cc[channel]--;
if (!dma.cc[channel] && (dma.mode[channel] & 0x10))
if (dma.cc[channel] < 0)
{
dma.cc[channel] = dma.cb[channel] + 1;
dma.ac[channel] = dma.ab[channel];
dma.stat |= (1 << channel);
}
else if (dma.cc[channel]<=-1)
{
dma.m |= (1 << channel);
if (dma.mode[channel] & 0x10) /*Auto-init*/
{
dma.cc[channel] = dma.cb[channel];
dma.ac[channel] = dma.ab[channel];
}
else
dma.m |= (1 << channel);
dma.stat |= (1 << channel);
}
@ -361,15 +361,14 @@ int dma_channel_write(int channel, uint16_t val)
if (dma16.mode[channel]&0x20) dma16.ac[channel]--;
else dma16.ac[channel]++;
dma16.cc[channel]--;
if (!dma16.cc[channel] && (dma16.mode[channel] & 0x10))
if (dma16.cc[channel] < 0)
{
dma16.cc[channel] = dma16.cb[channel] + 1;
dma16.ac[channel] = dma16.ab[channel];
dma16.stat |= (1 << channel);
}
else if (dma16.cc[channel] <= -1)
{
dma16.m |= (1 << channel);
if (dma16.mode[channel] & 0x10) /*Auto-init*/
{
dma16.cc[channel] = dma16.cb[channel] + 1;
dma16.ac[channel] = dma16.ab[channel];
}
dma16.m |= (1 << channel);
dma16.stat |= (1 << channel);
}