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Merge pull request #4488 from shattered/_3792b7f088

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sblaster: DMA fixes for SB Pro and SB16
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R. Belmont 2019-01-07 16:12:07 -05:00 committed by GitHub
commit 04cdcc4fa9
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1 changed files with 8 additions and 10 deletions
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18
src/devices/bus/isa/sblaster.cpp
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@ -66,7 +66,7 @@ static const int m_cmd_fifo_length[256] =
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 6x */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 6x */
-1, -1, -1, -1, 3, 3, 3, 3, -1, -1, -1, -1, -1, 1, -1, 1, /* 7x */ -1, -1, -1, -1, 3, 3, 3, 3, -1, -1, -1, -1, -1, 1, -1, 1, /* 7x */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 8x */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 8x */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 9x */ 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 9x */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* Ax */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* Ax */
4, -1, -1, -1, -1, -1, 4, -1, 4, -1, -1, -1, -1, -1, 4, -1, /* Bx */ 4, -1, -1, -1, -1, -1, 4, -1, 4, -1, -1, -1, -1, -1, 4, -1, /* Bx */
4, -1, -1, -1, -1, -1, 4, -1, 4, -1, -1, -1, -1, -1, 4, -1, /* Cx */ 4, -1, -1, -1, -1, -1, 4, -1, 4, -1, -1, -1, -1, -1, 4, -1, /* Cx */
@ -356,6 +356,7 @@ void sb_device::process_fifo(uint8_t cmd)
break; break;
case 0x1c: // 8-bit DMA with autoinit case 0x1c: // 8-bit DMA with autoinit
case 0x90: // 8-bit DMA with autoinit, high speed. XXX only on DSP 3.xx
// printf("Start DMA (autoinit, size = %x)\n", m_dsp.dma_length); // printf("Start DMA (autoinit, size = %x)\n", m_dsp.dma_length);
m_dsp.dma_transferred = 0; m_dsp.dma_transferred = 0;
m_dsp.dma_autoinit = 1; m_dsp.dma_autoinit = 1;
@ -583,6 +584,12 @@ void sb_device::process_fifo(uint8_t cmd)
mode = m_dsp.fifo[1]; mode = m_dsp.fifo[1];
m_dsp.flags = 0; m_dsp.flags = 0;
m_dsp.dma_length = (m_dsp.fifo[2] + (m_dsp.fifo[3]<<8)) + 1; m_dsp.dma_length = (m_dsp.fifo[2] + (m_dsp.fifo[3]<<8)) + 1;
if(cmd & 0x04)
m_dsp.dma_autoinit = 1;
if(mode & 0x10)
m_dsp.flags |= SIGNED;
if(mode & 0x20)
m_dsp.flags |= STEREO;
if((cmd & 0xf0) == 0xb0) if((cmd & 0xf0) == 0xb0)
{ {
m_dsp.flags |= SIXTEENBIT; m_dsp.flags |= SIXTEENBIT;
@ -591,15 +598,6 @@ void sb_device::process_fifo(uint8_t cmd)
} }
else else
drq_w(1); drq_w(1);
if(cmd & 0x04)
m_dsp.dma_autoinit = 1;
if(mode & 0x10)
m_dsp.flags |= SIGNED;
if(mode & 0x20)
{
m_dsp.flags |= STEREO;
m_dsp.dma_length <<= 1;
}
m_dsp.dma_transferred = 0; m_dsp.dma_transferred = 0;
m_dsp.dma_timer_started = false; m_dsp.dma_timer_started = false;
m_dsp.dma_throttled = false; m_dsp.dma_throttled = false;