Int 15 Fn E800  - Compaq Contura Aero, Contura 400 - Get System Model Cod  [b]

   AX = E800h
   BX = ??? (0000h)

Return: CF clear if successful
       BH = 02h
       BL = submodel??? (0Ch,0Dh,34h,38h,40h,44h,48h,64h,68h)
   CF set on error
   others???

Notes: used by Compaq's SOFTPAQ number 0937 EPPBIOS.SYS to determine whether
     the Enhanced Parallel Port expected by that driver is available
   used by Compaq's SOFTPAW number 0856 VOLCTRL.EXE to determine whether
     volume control hardware expected by that driver is available