Ken Shirriff's blog

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

Y Combinator's Xerox Alto: restoring the legendary 1970s GUI computer

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Alan Kay recently gave his 1970's Xerox Alto to Y Combinator and I'm helping with the restoration of this legendary system. The Al...
26 comments:

Inside card sorters: 1920s data processing with punched cards and relays

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Punched card sorters were a key part of data processing from 1890 until the 1970s, used for accounting, inventory, payroll and many other ...
5 comments:

Reverse engineering the popular 555 timer chip (CMOS version)

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This article explains how the LMC555 timer chip works, from the tiny transistors and resistors on the silicon chip, to the functional units...
6 comments:

Counterfeit Macbook charger teardown: convincing outside but dangerous inside

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What's inside a counterfeit Macbook charger? After my Macbook charger teardown , a reader sent me a charger he suspected was counterfe...
32 comments:
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