Ken Shirriff's blog

Computer history, restoring vintage computers, IC reverse engineering, and whatever

The unusual bootstrap drivers inside the 8086 microprocessor chip

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The 8086 microprocessor is one of the most important chips ever created; it started the x86 architecture that still dominates desktop and ...
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Reverse-engineering a 1960s cordwood flip flop module with X-ray CT scans

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How can you find out what's inside a sealed electronics module from the 1960s? In this blog post, I reverse-engineer an encapsulated f...
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Reverse-engineering the Apollo spacecraft's FM radio

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How did NASA communicate with the Apollo astronauts, hundreds of thousands of miles from Earth? The premodulation processor 1 (below) was...
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X-ray reverse-engineering a hybrid module from 1960s Apollo test equipment

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In this blog post, I reverse-engineer a hybrid module that was used for ground-testing of equipment from the Apollo space program. But fir...
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