INT 2F - METZTSR.COM - INSTALLATION CHECK

	AX = A900h
	CF set
Return: CF clear if resident
	    AX = 97FFh
	CF set if not present
Notes:	METZTSR.COM prevents METZ applications (such as the MAGIC screen
	  saver) inactivity timeout while running a DOSapp under MS Windows.
	the default multiplex number is A9h, but may be set to any value from
	  80h to FFh with a commandline switch
SeeAlso: AX=A901h,AX=A902h