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Cleaned up DMA emulation.

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This commit is contained in:
TomW 2013-10-27 14:37:01 +00:00
commit a514d2fe4b
6 changed files with 178 additions and 440 deletions
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6
src/sound_adlibgold.c
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@ -86,14 +86,14 @@ void adgold_getsamp_dma(adgold_t *adgold, int channel)
if ((adgold->adgold_mma_regs[channel][0xc] & 0x60) && (((adgold->adgold_mma_fifo_end[channel] - adgold->adgold_mma_fifo_start[channel]) & 255) >= 127))
return;
temp = readdma1();
temp = dma_channel_read(1);
// pclog("adgold DMA1 return %02X %i L\n", temp, channel);
if (temp == -1) return;
if (temp == DMA_NODATA) return;
adgold->adgold_mma_fifo[channel][adgold->adgold_mma_fifo_end[channel]] = temp;
adgold->adgold_mma_fifo_end[channel] = (adgold->adgold_mma_fifo_end[channel] + 1) & 255;
if (adgold->adgold_mma_regs[channel][0xc] & 0x60)
{
temp = readdma1();
temp = dma_channel_read(1);
// pclog("adgold DMA1 return %02X %i H\n", temp, channel);
adgold->adgold_mma_fifo[channel][adgold->adgold_mma_fifo_end[channel]] = temp;
adgold->adgold_mma_fifo_end[channel] = (adgold->adgold_mma_fifo_end[channel] + 1) & 255;