Category: security

INT 21 - SoftLogic Data Guardian - ???

	AX = 4101h
	DX = FFFEh
Return: AX = 0000h if installed
Note:	resident code sets several internal variables on this call
SeeAlso: AH=3Fh"NB.SYS",INT 16/AX=FFA3h/BX=0000h