Int 63 Fn 01  - Bw-tcp - Tcpip.sys - ???                                   [N]

   AH = 01h
   ES:BX -> ???
   ???

Return: ???
Range: INT 4D to INT FC, selected by configuration

Note:  the Beame&Whiteside TCP/IP protocol stack uses two consecutive
     interrupts (62h and 63h by default); the BW-NFS client uses a third
     consecutive interrupt (64h by default) if it is loaded

See Also: AH=00h"BW-TCP",AH=02h"BW-TCP"