INT 6D U - Matrox Multiple Monitor Support v1.0 - INSTALLATION CHECK            
	AX = BD6Fh
	BL = subfunction
	    00h installation check
	    01h disable TSR(Terminate and Stay Resident) A program which remains in memory after terminating in order to provide services to other programs or the user.  The name comes from the name of the DOS function call used to remain in memory after termination.
	    02h enable TSR(Terminate and Stay Resident) A program which remains in memory after terminating in order to provide services to other programs or the user.  The name comes from the name of the DOS function call used to remain in memory after termination. (see AX=BD60h)
Return: AX = 00BDh if installed
SeeAlso: AX=BD60h,AX=BD61h,AX=BDFFh