INT 1A - Sperry PCIBM PC - SET REAL-TIME CLOCK DATE
	AH = 05h
	CL = year-1980
	CH = 00h (???)
	DH = month (binary) (01h-0Ch)
	DL = day (binary) (01h-1Fh)
Return: nothing
SeeAlso: AH=02h,AH=04h"Sperry",AH=05h,INT 21/AH=2Bh"DATE"