RTC_REGA
rtc_write(RTC_REGA, REGA_DIVIDER_DIS);
rtc_write(RTC_REGA, REGA_DIVIDER_32K | REGA_PERIOD_512HZ);
rtc_write(RTC_REGA, REGA_DIVIDER_32K | REGA_PERIOD_128HZ);
rtc_write(RTC_REGA, REGA_DIVIDER_DIS);
rtc_write(RTC_REGA, REGA_DIVIDER_32K | REGA_PERIOD_512HZ);
rtc_write(RTC_REGA, REGA_DIVIDER_DIS);
rtc_write(RTC_REGA, REGA_DIVIDER_DIS);
rtc_write(RTC_REGA, REGA_DIVIDER_32K);
rtc_write(RTC_REGA, REGA_DIVIDER_DIS);
rtc_write(RTC_REGA, REGA_DIVIDER_32K);
outb(CMOS_ADDR, RTC_REGA);