void m58846_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
{
if (id != 0)
return;
// timer 1: 7-bit fixed counter (manual specifically says 127)
if (++m_tmr_count[0] == 127)
{
m_tmr_count[0] = 0;
m_irqflag[1] = true;
m_possible_irq = true;
}
// timer 2: 8-bit user defined counter with auto-reload
if (m_v & 8 && ++m_tmr_count[1] == 0)
{
m_tmr_count[1] = m_tmr_reload;
m_irqflag[2] = true;
m_possible_irq = true;
m_port_t ^= 1;
m_write_t(m_port_t);
}
// schedule next timeout
reset_timer();
}
void melps4_cpu_device::device_reset()
{
m_sm = m_sms = false;
m_ba_flag = false;
m_skip = false;
m_op = m_prev_op = 0;
m_pc = m_prev_pc = 0;
op_lcps(); // CPS=0
// clear interrupts
m_inte = 0;
m_intp = 1;
write_v(0);
write_w(0);
m_irqflag[0] = m_irqflag[1] = m_irqflag[2] = false;
m_prohibit_irq = false;
m_possible_irq = false;
// clear ports
write_d_pin(MELPS4_PORTD_CLR, 0);
write_gen_port(MELPS4_PORTS, 0);
write_gen_port(MELPS4_PORTF, 0);
write_gen_port(MELPS4_PORTG, 0);
write_gen_port(MELPS4_PORTU, 0);
m_write_t(0); m_port_t = 0;
}
