INT 67 - LIM EMS 4.0 - ALLOCATE STANDARD/RAW PAGES
        AH = 5Ah
        AL = subfunction
            00h allocate standard pages
            01h allocate raw pages
        BX = number of pages to allocate
Return: DX = handle
        AH = status
            00h successful
            80h internal error
            81h hardware failure
            84h undefined function requested
            85h no more handles available
            87h insufficient memory pages in system
            88h insufficient memory pages available
            8Fh undefined subfunction

.