Int 2F Fn BC00  - Windows 3.0, DOS 5+ EGA.sys - Installation Check         [V]

   AX = BC00h

Return: AL = 00h not installed, OK to install
      = 01h not installed, not OK to install
      = FFh installed
       BX = 5456h ("TV")

Note:  AH=BCh is the default value, which may be changed by a command line
     parameter to any value between 80h and FFh

See Also: AX=BC06h"EGA",INT 10/AH=FAh"EGA"