Ken Shirriff's blog
Computer history, restoring vintage computers, IC reverse engineering, and whatever
Inside the Apollo Guidance Computer's core memory
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The Apollo Guidance Computer (AGC) provided guidance, navigation and control onboard the Apollo flights to the Moon. This historic computer ...
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Accounting machines, the IBM 1403, and why printers standardized on 132 columns
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Have you ever wondered why 132 characters is such a common width for printers? Many printers produced lines of 132 characters, such as the g...
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Hammer time: fixing the printer on a vintage IBM 1401 mainframe
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The Computer History Museum has two operational IBM 1401 computers used for demos but one of the printers stopped working a few weeks ago....
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