int melps4_cpu_device::read_d_pin(int bit)
{
// read port D, return state of selected pin
bit &= 0xf;
UINT16 d = (m_port_d | m_read_d(bit, 0xffff)) & m_d_mask;
return d >> bit & 1;
}
int hmcs40_cpu_device::read_d(int index)
{
index &= 15;
if (m_polarity)
return (m_read_d(index, 0xffff) & m_d) >> index & 1;
else
return (m_read_d(index, 0xffff) | m_d) >> index & 1;
UINT8 ucom4_cpu_device::input_r(int index)
{
index &= 0xf;
UINT8 inp = 0xf;
switch (index)
{
case NEC_UCOM4_PORTA: inp = m_read_a(index, 0xff); break;
case NEC_UCOM4_PORTB: inp = m_read_b(index, 0xff); break;
case NEC_UCOM4_PORTC: inp = m_read_c(index, 0xff); break;
case NEC_UCOM4_PORTD: inp = m_read_d(index, 0xff); break;
default:
logerror("%s read from unknown port %c at $%03X\n", tag(), 'A' + index, m_prev_pc);
break;
}
return inp & 0xf;
}