Int 67 Fn 4E  - Lim Ems - Get Or Set Page Map                              [m]

   AH = 4Eh
   AL = subfunction
       00h get mapping registers
       01h set mapping registers
       02h get and set mapping registers at once
       03h get size of page-mapping array
   DS:SI -> array holding information (AL=01h/02h)
   ES:DI -> array to receive information (AL=00h/02h)

Return: AH = status (00h,80h,81h,84h,8Fh,A3h) (see also AH=40h)
       00h successful
       AL = bytes in page-mapping array (AL=03h only)
       array pointed to by ES:DI receives mapping info (AL=00h/02h)

Notes: this function was designed to be used by multitasking operating systems
     and should not ordinarily be used by appplication software.
   MD386 returns the size of the page-mapping array in AX instead of AL

See Also: AH=4Fh