INT 61 - TCPOpen kernel - API
        ES:BX -> request packet (see below)
Program: TCPOpen is a TCP/IP protocol stack by Lanera
Note:   the interrupt number may be set to any value from 60h through 7Fh
          (default 61h) via the configuration file; there does not appear
          to be an installation check, though function FFFFh can be used to
          verify that the software is indeed functioning

Format of request packet:
Offset  Size    Description
 00h  8 BYTEs   ???
 08h    WORD    function number (0000h-001Ah or FFF9h-FFFFh)
 0Ah    WORD    ???
 0Ch  2 BYTEs   ???
 0Eh    WORD    (return) return code
 10h  2 BYTEs   ???
 12h    WORD    ???
 14h    WORD    (return) 0001h if requested function complete
 16h    WORD    (return) ???
 18h  6 BYTEs   ???
 1Eh    DWORD   -> ???
 22h    WORD    ??? or 0000h
 24h    WORD    (return) ???

Function FFFFh: installation verification
        Return: offset 10h = BEEFh
                offset 14h = 0001h
                offset 24h = ???
Index:  installation check;TCPOpen kernel

.