INT 67 - LIM EMS 4.0 - GET MAPPABLE PHYSICAL ADDRESS ARRAY
        AH = 58h
        AL = subfunction
            00h get mappable physical address array
                ES:DI -> buffer to be filled with array
            01h get number of entries in m.p.a. array
Return: CX = number of entries in array
        AH = status (00h,80h,81h,84h,8Fh) (see AH=57h)
Note:   the returned array for subfunction 00h is filled in physical segment
          address order

Format of mappable physical address entry:
Offset  Size    Description
 00h    WORD    physical page segment
 02h    WORD    physical page number

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