Function  58h	Get or Set Alloction Strategy    (Dos 3.x)
entry	AH	58h
	AL	00h	Get Strategy Code
			return	AX	current strategy code
		01h	Set Strategy Code
			BX	00h	first fit stratigy
				01h	best fit
				02h	last fit
return	CF	set if error
		AX	error code
note 1)	The memory allocation strategies are:
	First Fit: MS-DOS searches the available memory blocks from low 
		addresses to high addresses, assigning the first one large 
		enough to satisfy the block allocation request.
	Best Fit: Searches all available memory blocks and assigns the 
		smallest available block that will satisfy the request, 
		regardless of its position.
	Last Fit: Searches the available memory blocks from high addresses to 
		low adresses, assigning the highest one large enough to 
		satisfy the block allocation request.
     2)	The default MS-DOS memory allocation strategy is First Fit (code 0)