Ken Shirriff's blog
Xerox Alto restoration, IC reverse engineering, chargers, and whatever
How "special register groups" invaded computer dictionaries for decades
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Half a century ago, the puzzling phrase "special register groups" started showing up in definitions of "CPU", and it is ...
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A visit to the Large Scale Systems Museum
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I didn't expect to find two floors filled with vintage computers in a sleepy town outside Pittsburgh. But that's the location of the...
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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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