Hi! I've received permission from the author of "68000 Microcomputer Systems Designing and Troubleshooting" to include the S-100 68K CPU board as part of the N8VEM home brew computing project for educational purposes. This is a classic text found in many computer science and engineering courses in the 1980's and 1990's. It is possible some here recall the book http://www.amazon.com/68000-Microcomputer-Systems-Designing-Troubleshooting/ dp/0138113998/ref=sr_1_1?s=gateway <http://www.amazon.com/68000-Microcomputer-Systems-Designing-Troubleshooting /dp/0138113998/ref=sr_1_1?s=gateway&ie=UTF8&qid=1285587152&sr=8-1> &ie=UTF8&qid=1285587152&sr=8-1 As part of that effort, I am capturing the schematic and PCB layout from the book as closely as possible. The intent is to replicate the authors' original board. There is a draft schematic and PCB layout on the N8VEM wiki here: http://n8vem-sbc.pbworks.com/browse/#view=ViewFolder <http://n8vem-sbc.pbworks.com/browse/#view=ViewFolder&param=S-100%252068K%25 20CPU> &param=S-100%252068K%2520CPU If anyone is interested in helping with this project please contact me. In particular, I am looking for volunteers to review the schematic and compare it against the schematic and PCB layout in the book. Due to the complexity of this board quality assurance is extremely important. Actually if anyone has one of these boards or experience with them I would be very interested in hearing from you. The plan is to make a limited run of manufactured prototype PCBs to do an initial build and test of the board. If you are an experienced builder and interested in participating in the initial build and test please contact me. The corrections/updates from the prototype board will be incorporated into a board to be made available for all the N8VEM builders as part of the S-100 project. Thanks and have a nice day! Andrew Lynch