Int 15 Fn D8  - Compaq Eisa System Rom 04/08/93 - 32-bit Cs Addressing Mo  [b]

   AH = D8h
   AL = A0h to A6h
   other registers as appropriate for AL=20h to 26h

Return: as appropriate for AL=20h to 26h

Note:  these functions are identical to AX=D820h to D826h, except that they
     should be called when using 32-bit CS addressing mode