INT 1A - Sperry PC - GET REAL-TIME CLOCK DATE

	AH = 04h
Return: CF clear if successful
	    CL = year-1980
	    DH = month (binary) (01h-0Ch)
	    DL = day (binary) (01h-1Fh)
	CF set on error
SeeAlso: AH=02h,AH=04h,AH=05h"Sperry",INT 21/AH=2Ah,INT 4B/AH=02h"TI"