static UINT8 ppi8255_read_port(running_device *device, int port)
{
ppi8255_t *ppi8255 = get_safe_token(device);
UINT8 result = 0x00;
if (ppi8255->in_mask[port])
{
if (ppi8255->port_read[port].read != NULL)
ppi8255_input(device, port, devcb_call_read8(&ppi8255->port_read[port], 0));
result |= ppi8255->read[port] & ppi8255->in_mask[port];
}
result |= ppi8255->latch[port] & ppi8255->out_mask[port];
switch (port)
{
case 0:
/* clear input buffer full flag */
ppi8255->ibf_a = 0;
break;
case 1:
/* clear input buffer full flag */
ppi8255->ibf_b = 0;
break;
case 2:
/* read special port 2 signals */
ppi8255_get_handshake_signals(ppi8255, 1, &result);
break;
}
return result;
}
UINT8 ppi8255_device::ppi8255_read_port(int port)
{
UINT8 result = 0x00;
if (m_in_mask[port])
{
ppi8255_input(port, m_port_read[port](0));
result |= m_read[port] & m_in_mask[port];
}
result |= m_latch[port] & m_out_mask[port];
switch (port)
{
case 0:
/* clear input buffer full flag */
m_ibf_a = 0;
break;
case 1:
/* clear input buffer full flag */
m_ibf_b = 0;
break;
case 2:
/* read special port 2 signals */
ppi8255_get_handshake_signals(1, &result);
break;
}
return result;
}
void ppi8255_set_port_c( running_device *device, UINT8 data ) { ppi8255_input(device, 2, data); }