LODS - Load String (Byte, Word or Double)

	Usage:	LODS	src
		LODSB
		LODSW
		LODSD  (386+ only)
	Modifies flags: None

	Transfers string element addressed by DS:SI (even if an operand is
	supplied) to the accumulator.	SI is incremented based on the size
	of the operand or based on the instruction used.  If the Direction
	Flag is set SI is decremented, if the Direction Flag is clear SI
	is incremented.  Use with REP prefixes.


				 Clocks			Size
	Operands	 808x  286   386   486		Bytes

	src		12/16	5     5	    5		  1


	- see Instruction Timing