RTC_REG_A
CMOS_WRITE(RTC_REF_CLCK_32KHZ, RTC_REG_A);
if ((CMOS_READ(RTC_REG_A) & 0x7f) == RTC_REF_CLCK_32KHZ &&
CMOS_WRITE(RTC_REF_CLCK_32KHZ | rate, RTC_REG_A);
while (CMOS_READ(RTC_REG_A) & RTC_UIP);
while (!(CMOS_READ(RTC_REG_A) & RTC_UIP));
while (CMOS_READ(RTC_REG_A) & RTC_UIP);
while (!(CMOS_READ(RTC_REG_A) & RTC_UIP));
while (CMOS_READ(RTC_REG_A) & RTC_UIP);
#define RTC_FREQ_SELECT RTC_REG_A