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Add some temporary disabled code for each peripheral

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(copied from io.c)
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Godzil
2022-06-27 17:02:35 +01:00
parent 83e4b8d5d9
commit f45995167e
7 changed files with 312 additions and 512 deletions
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45
source/peripherals/dma.c
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@@ -7,3 +7,48 @@
*
******************************************************************************/
#if 0
Need to check how to differenciate all the DMA types.
WRITE:
case 0x48: // DMA
// bit 7 set to start dma transfer
if (value & 0x80)
{
uint32_t dma_start = (ws_ioRam[0x41] << 8) | (ws_ioRam[0x40]) | (ws_ioRam[0x42] << 16);
uint32_t dma_dest = (ws_ioRam[0x45] << 8) | (ws_ioRam[0x44]) | (ws_ioRam[0x43] << 16);
uint32_t dma_size = (ws_ioRam[0x47] << 8) | (ws_ioRam[0x46]);
uint8_t dma_inc = (value & 0x01) ? -1: 1;
Log(TLOG_VERBOSE, "DMA", "Starting DMA from %08X to %08X (len: %08X, inc: %d)",
dma_start, dma_dest, dma_size, dma_inc);
for (uint32_t ix = 0 ; ix < dma_size ; ix++)
{
mem_writemem20(dma_dest, mem_readmem20(dma_start));
dma_start += dma_inc;
dma_dest += dma_inc;
}
ws_ioRam[0x47] = 0;
ws_ioRam[0x46] = 0;
ws_ioRam[0x41] = (uint8_t)(dma_start >> 8);
ws_ioRam[0x40] = (uint8_t)(dma_start & 0xff);
ws_ioRam[0x45] = (uint8_t)(dma_dest >> 8);
ws_ioRam[0x44] = (uint8_t)(dma_dest & 0xff);
ws_ioRam[0x48] = 0;
}
break;
#endif