Int 2F Fn C00C  - Ad-dos - Set ??? Internal Flag To 01h                    [V]

   AX = C00Ch

Return: AX = status
       0000h successful
       000Ch failed
Program: AD-DOS is the DOS version of the After Dark screen blanker for
     MS Windows

Note:  AH=C0h is the default multiplex number; if this is already in use,
     After Dark will try successive values up to AH=FFh
Index: screen saver;AD-DOS