Ken Shirriff's blog
Computer history, restoring vintage computers, IC reverse engineering, and whatever
Inside a transistorized shift register box, built in 1965 for Apollo testing
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One of the under-appreciated aspects of the Apollo launches to the Moon is how much testing was required. I recently came across an item t...
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Teardown of a PC power supply
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Have you ever wondered what's inside your computer's power supply? The task of a PC power supply is to convert the power from the...
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Reverse-engineering a vintage OR/NOR chip
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Recently, I received a die photo of a mystery integrated circuit, the OQ100, 1 from EvilMonkeyDesignz . I analyzed the die photo and foun...
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Reverse-engineering a vintage comparator chip
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I recently saw an interesting die photo of an unknown chip on Twitter , so I did some analysis of it. Looking at the circuitry inside, the...
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