Int 15 Fn E4  - Compaq ROM BIOS 03/08/93 And Newer - ???                   [b]

   AH = E4h
   AL = subfunction
       00h get ???

       Return: CF clear
           AH = 00h
           CX = 0000h
           BX = ??? (read from [XBDA:0094h])
       01h,02h unsupported by this ROM version

       Return: CF set, AH = 86h
       80h,90h,A0h,B0h,C0h,D0h,E0h,F0h set ???

       Return: CF clear
           AH = 00h
           CX = 0000h
           BX = ???
       81h,91h,A1h,B1h,C1h,D1h,E1h,F1h unsupported by 3/8/93&4/8/93 ROMs

       Return: CF set, AH = 86h

Notes: functions 80h/90h/etc. are not supported by the 4/8/93 EISA System ROM
   these functions are not supported by the 7/26/93 LTE Lite 386 ROM