void I8255::write_io8(uint32 addr, uint32 data)
{
int ch = addr & 3;
switch(ch) {
case 0:
case 1:
case 2:
if(port[ch].wreg != data || port[ch].first) {
write_signals(&port[ch].outputs, data);
port[ch].wreg = data;
port[ch].first = false;
}
break;
case 3:
if(data & 0x80) {
port[0].rmask = (data & 0x10) ? 0xff : 0;
port[0].mode = (data >> 5) & 3;
port[1].rmask = (data & 2) ? 0xff : 0;
port[1].mode = (data >> 2) & 1;
port[2].rmask = ((data & 8) ? 0xf0 : 0) | ((data & 1) ? 0xf : 0);
// clear ports
if(clear_ports_by_cmdreg) {
write_io8(0, 0);
write_io8(1, 0);
write_io8(2, 0);
}
}
else {
void UPD765A::write_dma_io8(uint32 addr, uint32 data)
{
#ifdef UPD765A_DMA_MODE
// EPSON QC-10 CP/M Plus
dma_data_lost = false;
#endif
write_io8(1, data);
}
void SCSI::write_dma_io8(uint32 addr, uint32 data)
{
write_io8(0xc30, data);
}
void SASI::write_dma_io8(uint32 addr, uint32 data)
{
write_io8(0x1f0, data);
}
