tcpkit

Introduction
TCPKIT is a software library for the Cybiko Handheld Computer by Cybiko, Inc.  TCPKIT gives the Cybiko TCP/IP Internet connectivity.  The library (TCPLIB.o) is a set of 16 function calls giving the Cybiko full access to TCP/IP servers on the Internet.  Because of the unique nature of programming the Cybiko, the TCPKIT library does not conform to the POSIX standard.  Instead, a set of simplified function calls is offered that should be easy for the novice and experienced programmer alike.

TCPKIT uses the “CyWIG” model for achieving an Internet connection.  A PC with an Internet connection is used as a gateway to Internet services.  A “Junction” Cybiko Classic is connected to the PC through an available serial port.  The TCPGate.exe program is run on the PC and makes connection to the Internet.  

TCPJunction.app is run on the Junction Cybiko.  It receives messages from one or more other Cybikos through its antenna and converts the messages into serial packets (SLIP protocol with checksum).  TCPGate.exe receives the serial connection, converts it into a TCP/IP message and delivers it to the Internet.

Client Cybikos (Classic or Xtreme) run applications created with TCPLIB.o.  It is up to the application programmer to provide and interpret proper protocol for the service the client connects to.