Build a low cost home brew computer. The N8VEM SBC is designed to teach basic principles of computer hardware and software. The hardware is cheap, readily available, all the information is free (beer/speech). It is designed for quick, easy, and reliable construction using simple tools.
The N8VEM project is open and all design information for hardware and software are freely and publicly posted. There are many N8VEM builders (>100) and an active community. The design is scalable from a single board computer with minimal parts and simple IO (serial & parallel) to a complete microcomputer.
mailing list http://groups.google.com/group/n8vem