Int 15 Fn E802  - Compaq Contura - Get ???                                 [b]

   AX = E802h

Return: CF clear
   AX = 0000h
   BX = ???
   CX = 0000h

Note:  this function is also supported by the LTE Lite 25c, 25E, and 486; not
     supported by LTE Lite 20 and 25.