void device_rtc_interface::advance_minutes()
{
m_register[RTC_MINUTE]++;
if (m_register[RTC_MINUTE] == 60)
{
m_register[RTC_MINUTE] = 0;
m_register[RTC_HOUR]++;
}
if (m_register[RTC_HOUR] == 24)
{
m_register[RTC_HOUR] = 0;
advance_days();
}
}
void msm6242_device::update_rtc_registers()
{
// get the absolute current time, in ticks
UINT64 curtime = current_time();
// how long as it been since we last updated?
UINT64 delta = curtime - m_last_update_time;
// set current time
m_last_update_time = curtime;
// no delta? just return
if (delta == 0)
return;
// ticks
if ((m_tick % 200) != (int)((delta + m_tick) % 0x200))
irq(IRQ_64THSECOND);
delta = bump(RTC_TICKS, delta, 0, 0x8000);
if (delta == 0)
return;
// seconds
irq(IRQ_SECOND);
delta = bump(RTC_SECOND, delta, 0, 60);
if (delta == 0)
return;
// minutes
irq(IRQ_MINUTE);
delta = bump(RTC_MINUTE, delta, 0, 60);
if (delta == 0)
return;
// hours
irq(IRQ_HOUR);
delta = bump(RTC_HOUR, delta, 0, 24);
if (delta == 0)
return;
// days
while(delta--)
advance_days();
}
