INT 2F - Kingswood TSR INTERFACE - INSTALLATION CHECK

	AH = 39h
	BL = 00h
	AL = TSR ID number (01h-FFh, currently only 01h-1Bh used) (see #02742)
Return: AL = status
	    00h not installed
	    FFh installed
		DX = segment address of resident module
Note:	All of Kingswood Software's TSRs use this interface.  Usually the
	  resident module is installed by allocating a block of upper memory,
	  setting its owner ID to 000Ah (used by DOS), and filling the MCB name
	  field with the TSR's name.
SeeAlso: #02743,AX=3900h,AH=39h/BL=01h