Jan Axelson's Lakeview Research

Jan Axelson's Lakeview Research

The developer's resource for computer interfacing, especially Ethernet and Internet communications for embedded systems, USB, mass storage, parallel port, and RS-232 and RS-485 serial communications. Plus info about 8052-Basic microcontrollers and making printed-circuit boards.

Parallel Port Complete

Virtually every PC has a parallel port that serves as a printer interface. But you can use the parallel port for much more than this, including interfacing to control circuits, data-acquisition devices, and instrumentation. Parallel Port Complete is a complete guide to using and programming the PC's parallel port.

The Tclers Wiki

The Tclers Wiki

What is Tcl/Tk? - Tcl is a simple-to-learn yet very powerful language. Its syntax is described in just a dozen rules, but it has all the features needed to rapidly create useful programs in almost any field of application - on a wide variety of international platforms. applying the parallel port to drive a LED and read a switch from tcl