Int 15 Fn D826  - Compaq Eisa System Rom 04/08/93 - ???                    [-]

   AX = D826h
   BX = ???
   CX = size of buffer in bytes
   DS:SI -> buffer for ???
   ???

Return: CF clear if successful
       AH = 00h
       CX = ???
   CF set on error
       AH = error code
       87h ??? failed
       88h ???

Note:  these functions are only available if ??? from keyboard controller
     command C0h