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Implemented DMA controller disable, PC2086/3086 self test works properly.

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This commit is contained in:
TomW 2013-12-29 16:05:24 +00:00
commit fce6ba5ea8
1 changed files with 7 additions and 1 deletions
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8
src/dma.c
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@ -252,12 +252,15 @@ int dma_channel_read(int channel)
{ {
uint16_t temp; uint16_t temp;
if (dma.command & 0x04)
return DMA_NODATA;
if (!AT) if (!AT)
refreshread(); refreshread();
if (channel < 4) if (channel < 4)
{ {
if (dma.m & (1 << channel)) if (dma.m & (1 << channel))
return DMA_NODATA; return DMA_NODATA;
if ((dma.mode[channel] & 0xC) != 8) if ((dma.mode[channel] & 0xC) != 8)
return DMA_NODATA; return DMA_NODATA;
@ -317,6 +320,9 @@ int dma_channel_read(int channel)
int dma_channel_write(int channel, uint16_t val) int dma_channel_write(int channel, uint16_t val)
{ {
if (dma.command & 0x04)
return DMA_NODATA;
if (!AT) if (!AT)
refreshread(); refreshread();