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Revert "Merge branch 'feature/machine_and_kb' into master"

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This reverts commit 6604a29d7e, reversing
changes made to 1d7fca0abd.
This commit is contained in:
Daniel Gurney
2021-07-04 18:22:52 +03:00
parent 6604a29d7e
commit f2cd3756dd
77 changed files with 3483 additions and 11882 deletions
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30
src/dma.c
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@@ -166,28 +166,6 @@ dma_block_transfer(int channel)
}
static void
dma_mem_to_mem_transfer(void)
{
int i;
if ((dma[0].mode & 0x0c) != 0x08)
fatal("DMA memory to memory transfer: channel 0 mode not read\n");
if ((dma[1].mode & 0x0c) != 0x04)
fatal("DMA memory to memory transfer: channel 1 mode not write\n");
dma_req_is_soft = 1;
for (i = 0; i <= dma[0].cb; i++)
dma_buffer[i] = dma_channel_read(0);
for (i = 0; i <= dma[1].cb; i++)
dma_channel_write(1, dma_buffer[i]);
dma_req_is_soft = 0;
}
static void
dma_sg_write(uint16_t port, uint8_t val, void *priv)
{
@@ -528,18 +506,14 @@ dma_write(uint16_t addr, uint8_t val, void *priv)
case 8: /*Control register*/
dma_command[0] = val;
if (val & 0x01)
pclog("[%08X:%04X] Memory-to-memory enable\n", CS, cpu_state.pc);
fatal("Memory-to-memory enable\n");
return;
case 9: /*Request register */
channel = (val & 3);
if (val & 4) {
dma_stat_rq_pc |= (1 << channel);
if ((channel == 0) && (dma_command[0] & 0x01)) {
pclog("Memory to memory transfer start\n");
dma_mem_to_mem_transfer();
} else
dma_block_transfer(channel);
dma_block_transfer(channel);
} else
dma_stat_rq_pc &= ~(1 << channel);
break;