void bitbanger_device::timer_input(void)
{
if(m_input_buffer_cursor == m_input_buffer_size)
{
/* get more data */
bytes_to_bits_81N();
if(m_input_buffer_size == 0)
{
/* no more data, wait and try again */
m_idle_delay = min(m_idle_delay + attotime::from_msec(100), attotime::from_seconds(1));
m_input_timer->adjust(m_idle_delay);
if( m_mode == BITBANGER_MODEM )
set_input_line(1);
else
set_input_line(0);
return;
}
else
{
m_idle_delay = m_current_baud;
m_input_timer->adjust(m_idle_delay, 0, m_idle_delay);
}
}
/* send bit to driver */
set_input_line(m_input_buffer[(m_input_buffer_cursor)++]);
}
void device_execute_interface::pulse_input_line(int irqline, const attotime &duration)
{
assert(duration > attotime::zero);
set_input_line(irqline, ASSERT_LINE);
attotime target_time = local_time() + duration;
m_scheduler->timer_set(target_time - m_scheduler->time(), timer_expired_delegate(FUNC(device_execute_interface::irq_pulse_clear), this), irqline);
}
void m68340_cpu_device::update_ipl()
{
uint8_t new_ipl = std::max({
pit_irq_level(),
m_serial->irq_level(),
m_timer[0]->irq_level(),
m_timer[1]->irq_level()
});
if (m_ipl != new_ipl)
{
if (m_ipl != 0)
set_input_line(m_ipl, CLEAR_LINE);
LOGMASKED(LOG_IPL, "Changing interrupt level from %d to %d\n", m_ipl, new_ipl);
m_ipl = new_ipl;
if (m_ipl != 0)
set_input_line(m_ipl, ASSERT_LINE);
}
}
void m68705_device::burn_cycles(unsigned count)
{
// handle internal timer/counter source
if (!tcr_tin()) // TODO: check tcr_tie() and gate on TIMER if appropriate
{
unsigned const ps_opt(tcr_ps());
unsigned const ps_mask((1 << ps_opt) - 1);
unsigned const decrements((count + (m_prescaler & ps_mask)) >> ps_opt);
if ((m_tdr ? unsigned(m_tdr) : 256U) <= decrements)
{
LOGTIMER("timer/counter expired%s%s\n", tcr_tir() ? " [overrun]" : "", tcr_tim() ? " [masked]" : "");
m_tcr |= 0x80;
if (!tcr_tim())
set_input_line(M68705_INT_TIMER, ASSERT_LINE);
}
m_prescaler = (count + m_prescaler) & 0x7f;
m_tdr = (m_tdr - decrements) & 0xff;
}
