INT 2F U - DR DOS 3.41-5.0, Novell DOS 7 KEYB - INSTALLATION CHECK              
	AX = AD00h
Return: AX = FFFFh if installed
	flags destroyed
Note:	the Novell DOS 7 KEYB driver only checks AL to determine whether it
	  is already installed
SeeAlso: AX=AD80h"Novell"