Function  2Dh  Set Time 
     Sets current system time 
entry   AH      2Dh 
	CH      hours   (0-23) 
	CL      minutes (0-59) 
	DH      seconds (0-59) 
	DL      hundredths of seconds (0-99) 
return  AL      00h     if no error 
		0FFh    if bad value sent to routine 
note 1) DOS 3.3 also sets CMOS clock 
     2) CX and DX must contain a valid time in binary