X1241REG_HR_MIL
WRITERTC(sc, X1241REG_HR, bintobcd(ymdhms->dt_hour) | X1241REG_HR_MIL);
ymdhms->dt_hour = bcdtobin(hour & ~X1241REG_HR_MIL);
WRITERTC(sc, X1241REG_HR, bintobcd(ymdhms->dt_hour) | X1241REG_HR_MIL);
ymdhms->dt_hour = bcdtobin(hour & ~X1241REG_HR_MIL);