Int 2F Fn C100  U - Personal Netware - Stpipx V1.00 - Installation Check   [N]

   AX = C100h

Return: AL = FFh if installed
       ES:SI -> signature string "STP-IPX$"
       BX = version??? (0001h for v1.00)
       DI corrupted

Note:  AH=C1h is the default value; STPIPX probably scans a range of
     multiplex numbers to find a free one, as LSL does

See Also: AX=C000h"LSL",AX=C101h