Cracking Open the Radio Shack TRS-80 Model 4P


The main circuit board of the TRS-80 Model 4P.

By Mark Kaelin

Mark W. Kaelin has been writing and editing stories about the IT industry, gadgets, finance, accounting, and tech-life for more than 25 years. Most recently, he has been a regular contributor to BreakingModern.com, aNewDomain.net, and TechRepublic.