void centronics_printer_image_device::device_reset()
{
m_busy = FALSE;
output_busy(m_busy);
output_fault(1);
output_ack(1);
}
void centronics_printer_image_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
{
switch (id)
{
case TIMER_ACK:
output_ack(param);
if (param == FALSE)
{
/* data is now ready, output it */
m_printer->output(m_data);
/* ready to receive more data, return BUSY to low */
timer_set(attotime::from_usec(7), TIMER_BUSY, FALSE);
}
break;
case TIMER_BUSY:
m_busy = param;
output_busy(m_busy);
if (param == TRUE)
{
/* timer to turn ACK low to receive data */
timer_set(attotime::from_usec(10), TIMER_ACK, FALSE);
}
else
{
/* timer to return ACK to high state */
timer_set(attotime::from_usec(5), TIMER_ACK, TRUE);
}
}
}
void centronics_printer_device::device_reset()
{
m_busy = false;
output_busy(m_busy);
output_fault(1);
output_ack(1);
output_select(1);
}