public link unit clock {}
driver.clock = clock;
public link unit char {}
driver.char = char;
public link void OS_init(){} = driver.OS_init;
public link void ڵ_е_ʾ(bit n1,bit n3){} = driver.ShowYearMouthDay;
public link void ڵ_е_ʾʱ(bit n1,bit n3){} = driver.ShowHourMinuteSecond;
