Int 67 Fn 5A  - LIM EMS 4.0 - Allocate Standard/raw Pages                  [m]

   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