Cracking Open the IBM PC Jr.


The XE 1503723 chip is a Analog Multiplexer / Demultiplxer - a sophisticated switch.

About 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.

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