AAA - Ascii Adjust for Addition

	Usage:	AAA
	Modifies flags: AF CF (OF,PF,SF,ZF undefined)


	Changes contents of AL to valid unpacked decimal.  The high order
	nibble is zeroed.


				 Clocks			Size
	Operands	 808x  286   386   486		Bytes

	none		  8	3     4	    3		  1


	- see Instruction Timing