Int 6D Fn BD6F  U - Matrox Multiple Monitor Support V1.0 - Installation C  [V]

   AX = BD6Fh
   BL = subfunction
       00h installation check
       01h disable TSR
       02h enable TSR (see AX=BD60h)

Return: AX = 00BDh if installed

See Also: AX=BD60h,AX=BD61h,AX=BDFFh