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[z80dma]: Fixed ready flag when the DMA disabled/enabled commands are used

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This commit is contained in:
Angelo Salese 2009-09-21 17:25:16 +00:00
parent b6e43d1bfd
commit b8932cd741
1 changed files with 6 additions and 0 deletions
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6
src/emu/machine/z80dma.c
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@ -151,6 +151,7 @@ static void z80dma_do_read(const device_config *device)
else
cntx->latch = cntx->intf->portA_read(device, cntx->addressA);
LOG(("A src: %04x \n",cntx->addressA));
cntx->addressA += PORTA_FIXED(cntx) ? 0 : PORTA_INC(cntx) ? PORTA_STEP(cntx) : -PORTA_STEP(cntx);
}
else
@ -160,6 +161,7 @@ static void z80dma_do_read(const device_config *device)
else
cntx->latch = cntx->intf->portB_read(device, cntx->addressB);
LOG(("B src: %04x \n",cntx->addressB));
cntx->addressB += PORTB_FIXED(cntx) ? 0 : PORTB_INC(cntx) ? PORTB_STEP(cntx) : -PORTB_STEP(cntx);
}
break;
@ -192,6 +194,7 @@ static int z80dma_do_write(const device_config *device)
else
cntx->intf->portB_write(device, cntx->addressB, cntx->latch);
LOG(("B dst: %04x \n",cntx->addressB));
cntx->addressB += PORTB_FIXED(cntx) ? 0 : PORTB_INC(cntx) ? PORTB_STEP(cntx) : -PORTB_STEP(cntx);
}
else
@ -201,6 +204,7 @@ static int z80dma_do_write(const device_config *device)
else
cntx->intf->portA_write(device, cntx->addressA, cntx->latch);
LOG(("A dst: %04x \n",cntx->addressA));
cntx->addressA += PORTA_FIXED(cntx) ? 0 : PORTA_INC(cntx) ? PORTA_STEP(cntx) : -PORTA_STEP(cntx);
}
cntx->count--;
@ -418,11 +422,13 @@ WRITE8_DEVICE_HANDLER( z80dma_w )
case 0x83: /* Disable dma */
LOG(("Disable DMA\n"));
cntx->dma_enabled = 0;
cntx->rdy = 1 ^ ((WR5(cntx) & 0x8)>>3);
z80dma_rdy_w(device, 0, cntx->rdy);
break;
case 0x87: /* Enable dma */
LOG(("Enable DMA\n"));
cntx->dma_enabled = 1;
cntx->rdy = (WR5(cntx) & 0x8)>>3;
z80dma_rdy_w(device, 0, cntx->rdy);
break;
case 0xBB: