Ken Shirriff's blog

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

Inside the Am2901: AMD's 1970s bit-slice processor

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You're probably familiar with modern processors made by Advanced Micro Devices. But AMD's processors go back to 1975, when AMD intr...
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A circuit board from the Saturn V rocket, reverse-engineered and explained

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In the Apollo Moon missions, the Saturn V rocket was guided by an advanced onboard computer system built by IBM. This system was built fro...
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Repairing a vintage 40-kilovolt xenon lamp igniter

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What do xenon lamps and the invention of radio have in common? The box below is a 1960s German high voltage unit that CuriousMarc obtain...
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