Computer history. Reverse-engineering old chips. Restored Apollo Guidance Computer, Xerox Alto. Put ₿ in Unicode. Arduino IRremote. PhD. Ex-Google,

Ken Shirriff on Twitter: "This box was a key part of testing the Apollo spacecraft for the mission to the Moon. I opened it up and reverse-engineered the unusual circuitry inside.… https://t.co/m4VqYck2oB"

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2021-06-16 18:30:05

Computer history. Reverse-engineering old chips. Restored Apollo Guidance Computer, Xerox Alto. Put ₿ in Unicode. Arduino IRremote. PhD. Ex-Google, Sun, Msft.

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This box was a key part of testing the Apollo spacecraft for the mission to the Moon. I opened it up and reverse-engineered the unusual circuitry inside.pic.twitter.com/YNQTpysb7S

Testing Apollo was hard. To test all the components of Apollo, NASA created (and patented) a complex system called Digital Test Command System. The testing control room (pictured below) sent digital commands to the spacecraft, to control and monitor all parts of the spacecraft.pic.twitter.com/1nIBqW4A83