INT 2F - KDRIVE v2.x - INSTALLATION CHECK                                       
	AX = D3D3h
	BH = 00h
Return: BX = 3D3Dh if installed
	CF clear if installed
	    AX = driver ID??? (returns 0087h for KDRIVE.EXE and 0880h for
		  KDRIVOS2.EXE in one examined version)
Program: KDRIVE is a shareware extended German keyboard driver by Martin
	  Austermeier, originally based on K3 by Martin Gerdes as published
	  in c't magazine 7/1988