POP - Pop Word off Stack

	Usage:	POP	dest
	Modifies flags: None


	Transfers word at the current stack top (SS:SP) to the destination
	then increments SP by two to point to the new stack top.  CS is not
	a valid destination.


				 Clocks			Size
	Operands	 808x  286   386   486		Bytes

	reg16		  8	5     4     4		  1
	reg32		  4	-     -	    4		  1
	segreg		  8	5     7	    3		  1
	mem16		17+EA	5     5     6		 2-4
	mem32		  5	-     -	    6		 2-4


	- see Instruction Timing