INT 21 - OS/286, OS/386 - SEGMENT CREATION                                      
	AH = E8h
	AL = type
	    00h data segment
	    01h data window/alias
	    02h real segment
	    03h real window/alias
		CX:DX = size in bytes
		SI:BX -> start of desired memory block
		Return:	AX = selector
	    06h shareable segment
	???
Return: ???
SeeAlso: AH=E7h"OS/286",AH=E9h"OS/286"