//-------------------------------------------------
// trigger_interrupt - TODO: needs attention for SIO
//-------------------------------------------------
void z80sio_device::trigger_interrupt(int index, int state)
{
uint8_t vector = m_chanB->m_wr2;
int priority;
LOGINT("%s %s \n",FUNCNAME, tag());
#if 0
if((m_variant == TYPE_I8274) || (m_variant == TYPE_UPD7201))
{
int prio_level = 0;
switch(state)
{
case z80sio_channel::INT_TRANSMIT:
prio_level = 1;
break;
case z80sio_channel::INT_RECEIVE:
case z80sio_channel::INT_SPECIAL:
prio_level = 0;
break;
case z80sio_channel::INT_EXTERNAL:
prio_level = 2;
break;
}
if(m_chanA->m_wr2 & z80sio_channel::WR2_PRIORITY)
{
priority = (prio_level * 2) + index;
}
else
{
priority = (prio_level == 2) ? index + 4 : ((index * 2) + prio_level);
}
if (m_chanB->m_wr1 & z80sio_channel::WR1_STATUS_VECTOR)
{
vector = (!index << 2) | state;
if((m_chanA->m_wr1 & 0x18) == z80sio_channel::WR2_MODE_8086_8088)
{
vector = (m_chanB->m_wr2 & 0xf8) | vector;
}
else
{
vector = (m_chanB->m_wr2 & 0xe3) | (vector << 2);
}
}
}
else
{
#endif
priority = (index << 2) | state;
if (m_chanB->m_wr1 & z80sio_channel::WR1_STATUS_VECTOR)
{
// status affects vector
vector = (m_chanB->m_wr2 & 0xf1) | (!index << 3) | (state << 1);
}
// }
// update vector register
m_chanB->m_rr2 = vector;
// trigger interrupt
m_int_state[priority] |= Z80_DAISY_INT;
m_chanA->m_rr0 |= z80sio_channel::RR0_INTERRUPT_PENDING;
// check for interrupt
check_interrupts();
}
//-------------------------------------------------
// m1_r - interrupt acknowledge
//-------------------------------------------------
int z80sio_device::m1_r()
{
LOGINT("%s %s \n",FUNCNAME, tag());
return z80daisy_irq_ack();
}
int z80dart_device::m1_r()
{
return z80daisy_irq_ack();
}
