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z80dma: Fixed Initiate read command

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This commit is contained in:
Angelo Salese 2009-09-16 22:45:38 +00:00
parent 024832f299
commit c8402e45ef
1 changed files with 9 additions and 6 deletions
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15
src/emu/machine/z80dma.c
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@ -362,12 +362,12 @@ WRITE8_DEVICE_HANDLER( z80dma_w )
case 0xA7: /* Initiate read sequence */
cntx->read_cur_follow = cntx->read_num_follow = 0;
if(READ_MASK(cntx) & 0x01) { cntx->read_regs_follow[cntx->read_num_follow++] = cntx->status; }
if(READ_MASK(cntx) & 0x02) { cntx->read_regs_follow[cntx->read_num_follow++] = GET_REGNUM(cntx, BLOCKLEN_L(cntx)); } //byte counter (low)
if(READ_MASK(cntx) & 0x04) { cntx->read_regs_follow[cntx->read_num_follow++] = GET_REGNUM(cntx, BLOCKLEN_H(cntx)); } //byte counter (high)
if(READ_MASK(cntx) & 0x08) { cntx->read_regs_follow[cntx->read_num_follow++] = GET_REGNUM(cntx, PORTA_ADDRESS_L(cntx)); } //port A address (low)
if(READ_MASK(cntx) & 0x10) { cntx->read_regs_follow[cntx->read_num_follow++] = GET_REGNUM(cntx, PORTA_ADDRESS_H(cntx)); } //port A address (high)
if(READ_MASK(cntx) & 0x20) { cntx->read_regs_follow[cntx->read_num_follow++] = GET_REGNUM(cntx, PORTB_ADDRESS_L(cntx)); } //port B address (low)
if(READ_MASK(cntx) & 0x40) { cntx->read_regs_follow[cntx->read_num_follow++] = GET_REGNUM(cntx, PORTA_ADDRESS_H(cntx)); } //port B address (high)
if(READ_MASK(cntx) & 0x02) { cntx->read_regs_follow[cntx->read_num_follow++] = BLOCKLEN_L(cntx); } //byte counter (low)
if(READ_MASK(cntx) & 0x04) { cntx->read_regs_follow[cntx->read_num_follow++] = BLOCKLEN_H(cntx); } //byte counter (high)
if(READ_MASK(cntx) & 0x08) { cntx->read_regs_follow[cntx->read_num_follow++] = PORTA_ADDRESS_L(cntx); } //port A address (low)
if(READ_MASK(cntx) & 0x10) { cntx->read_regs_follow[cntx->read_num_follow++] = PORTA_ADDRESS_H(cntx); } //port A address (high)
if(READ_MASK(cntx) & 0x20) { cntx->read_regs_follow[cntx->read_num_follow++] = PORTB_ADDRESS_L(cntx); } //port B address (low)
if(READ_MASK(cntx) & 0x40) { cntx->read_regs_follow[cntx->read_num_follow++] = PORTA_ADDRESS_H(cntx); } //port B address (high)
break;
case 0xC3: /* Reset */
LOG(("Reset\n"));
@ -415,6 +415,9 @@ WRITE8_DEVICE_HANDLER( z80dma_w )
/* FIXME: docs says these two is 1, but behaviour makes me think it's a 0, investigate */
cntx->status &= ~0x30;
break;
case 0xFB:
LOG(("Z80DMA undocumented command triggered!\n"));
break;
default:
fatalerror("Unknown WR6 command %02x", data);
}