LEAVE - Restore Stack for Procedure Exit (80188+)

	Usage:	LEAVE
	Modifies flags: None

	Releases the local variables created by the previous ENTER
	instruction by restoring SP and BP to their condition before
	the procedure stack frame was initialized.

				 Clocks			Size
	Operands	 808x  286   386   486		Bytes

	none		  -	5     4	    5		  1

	- see Instruction Timing