Ken Shirriff's blog
Computer history, restoring vintage computers, IC reverse engineering, and whatever
A computer built from NOR gates: inside the Apollo Guidance Computer
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We recently restored an Apollo Guidance Computer 1 , the computer that provided guidance, navigation, and control onboard the Apollo flight...
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Reverse-engineering precision op amps from a 1969 analog computer
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We are restoring a vintage 1 computer that CuriousMarc recently obtained. Analog computers were formerly popular for fast scientific compu...
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Risky line printer music on a vintage IBM mainframe
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At the Computer History Museum , we recently obtained card decks for a 50-year-old computer music program. Back then, most computers didn&#...
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