INT 2F - Nanosoft, Inc. TurboNET server - INSTALLATION CHECK
        AX = 8000h
Return: AL = FFh if installed
            BX = CS of resident code
            CX = ??? (03FCh)
Note:   TurboNET is a NetBIOS-based file redirector and server; a demonstration
          version may be downloaded from Nanosoft's BBS