static TIMER_CALLBACK(internal_timer_int)
{
compis_state *state = machine.driver_data<compis_state>();
int which = param;
struct timer_state *t = &state->m_i186.timer[which];
if (LOG_TIMER) logerror("Hit interrupt callback for timer %d\n", which);
/* set the max count bit */
t->control |= 0x0020;
/* request an interrupt */
if (t->control & 0x2000)
{
state->m_i186.intr.status |= 0x01 << which;
update_interrupt_state(machine);
if (LOG_TIMER) logerror(" Generating timer interrupt\n");
}
/* if we're continuous, reset */
if (t->control & 0x0001)
{
int count = t->maxA ? t->maxA : 0x10000;
t->int_timer->adjust(attotime::from_hz(2000000) * count, which);
if (LOG_TIMER) logerror(" Repriming interrupt\n");
}
else
t->int_timer->adjust(attotime::never, which);
}
void z80sio_device::z80daisy_irq_reti()
{
// loop over all interrupt sources
for (int irqsource = 0; irqsource < 8; irqsource++)
{
int inum = k_int_priority[irqsource];
// find the first channel with an IEO pending
if (m_int_state[inum] & Z80_DAISY_IEO)
{
VPRINTF(("sio IRQReti %d\n", inum));
// clear the IEO state and update the IRQs
m_int_state[inum] &= ~Z80_DAISY_IEO;
update_interrupt_state();
return;
}
}
logerror("z80sio_irq_reti: failed to find an interrupt to clear IEO on!\n");
}
int z80sio_device::z80daisy_irq_ack()
{
// loop over all interrupt sources
for (int irqsource = 0; irqsource < 8; irqsource++)
{
int inum = k_int_priority[irqsource];
// find the first channel with an interrupt requested
if (m_int_state[inum] & Z80_DAISY_INT)
{
VPRINTF(("sio IRQAck %d\n", inum));
// clear interrupt, switch to the IEO state, and update the IRQs
m_int_state[inum] = Z80_DAISY_IEO;
update_interrupt_state();
return m_channel[1].m_regs[2] + inum * 2;
}
}
logerror("z80sio_irq_ack: failed to find an interrupt to ack!\n");
return m_channel[1].m_regs[2];
}
static TIMER_CALLBACK(dma_timer_callback)
{
compis_state *state = machine.driver_data<compis_state>();
int which = param;
struct dma_state *d = &state->m_i186.dma[which];
/* force an update and see if we're really done */
//stream_update(dma_stream, 0);
/* complete the status update */
d->control &= ~0x0002;
d->source += d->count;
d->count = 0;
/* check for interrupt generation */
if (d->control & 0x0100)
{
if (LOG_DMA) logerror("DMA%d timer callback - requesting interrupt: count = %04X, source = %04X\n", which, d->count, d->source);
state->m_i186.intr.request |= 0x04 << which;
update_interrupt_state(machine);
}
}