UINT8 c64_ieee488_device::c64_cd_r(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2)
{
data = m_exp->cd_r(space, offset, data, sphi2, ba, roml, romh, io1, io2);
if (!roml && m_roml_sel)
{
data = m_roml[offset & 0xfff];
}
else if (!io2)
{
data = tpi6525_r(m_tpi, space, offset & 0x07);
}
return data;
}
static READ16_HANDLER( amiga_dmac_r )
{
offset &= 0xff;
switch( offset )
{
case 0x20:
{
UINT8 v = dmac_data.istr;
LOG(( "DMAC: PC=%08x - ISTR Read(%04x)\n", cpu_get_pc(&space->device()), dmac_data.istr ));
dmac_data.istr &= ~0x0f;
return v;
}
break;
case 0x21:
{
LOG(( "DMAC: PC=%08x - CNTR Read(%04x)\n", cpu_get_pc(&space->device()), dmac_data.cntr ));
return dmac_data.cntr;
}
break;
case 0x40: /* wtc hi */
{
LOG(( "DMAC: PC=%08x - WTC HI Read\n", cpu_get_pc(&space->device()) ));
return (dmac_data.wtc >> 16);
}
break;
case 0x41: /* wtc lo */
{
LOG(( "DMAC: PC=%08x - WTC LO Read\n", cpu_get_pc(&space->device()) ));
return dmac_data.wtc;
}
break;
case 0x42: /* acr hi */
{
LOG(( "DMAC: PC=%08x - ACR HI Read\n", cpu_get_pc(&space->device()) ));
return (dmac_data.acr >> 16);
}
break;
case 0x43: /* acr lo */
{
LOG(( "DMAC: PC=%08x - ACR LO Read\n", cpu_get_pc(&space->device()) ));
return dmac_data.acr;
}
break;
case 0x48: /* wd33c93 SCSI expansion */
case 0x49:
{
LOG(( "DMAC: PC=%08x - WD33C93 Read(%d)\n", cpu_get_pc(&space->device()), offset & 1 ));
return 0x00; /* Not available without SCSI expansion */
}
break;
case 0x50:
{
LOG(( "DMAC: PC=%08x - CDROM RESP Read\n", cpu_get_pc(&space->device()) ));
return matsucd_response_r(space->machine());
}
break;
case 0x51: /* XT IO */
case 0x52:
case 0x53:
{
LOG(( "DMAC: PC=%08x - XT IO Read(%d)\n", cpu_get_pc(&space->device()), (offset & 3)-1 ));
return 0xff;
}
break;
case 0x58: /* TPI6525 */
case 0x59:
case 0x5A:
case 0x5B:
case 0x5C:
case 0x5D:
case 0x5E:
case 0x5F:
case 0x60:
case 0x61:
case 0x62:
case 0x63:
case 0x64:
case 0x65:
case 0x66:
case 0x67:
{
device_t *tpi = space->machine().device("tpi6525");
LOG(( "DMAC: PC=%08x - TPI6525 Read(%d)\n", cpu_get_pc(&space->device()), (offset - 0x58) ));
return tpi6525_r(tpi, offset - 0x58);
}
break;
case 0x70: /* DMA start strobe */
{
LOG(( "DMAC: PC=%08x - DMA Start Strobe\n", cpu_get_pc(&space->device()) ));
dmac_data.dma_timer->adjust(attotime::from_msec( CD_SECTOR_TIME ));
}
break;
case 0x71: /* DMA stop strobe */
{
LOG(( "DMAC: PC=%08x - DMA Stop Strobe\n", cpu_get_pc(&space->device()) ));
dmac_data.dma_timer->reset( );
}
break;
case 0x72: /* Clear IRQ strobe */
{
LOG(( "DMAC: PC=%08x - IRQ Clear Strobe\n", cpu_get_pc(&space->device()) ));
dmac_data.istr &= ~ISTR_INT_P;
}
break;
case 0x74: /* Flush strobe */
{
LOG(( "DMAC: PC=%08x - Flush Strobe\n", cpu_get_pc(&space->device()) ));
dmac_data.istr |= ISTR_FE_FLG;
}
break;
default:
logerror( "DMAC-READ: PC=%08x, offset = %02x\n", cpu_get_pc(&space->device()), offset );
break;
}
return 0;
}
