Ken Shirriff's blog
Computer history, restoring vintage computers, IC reverse engineering, and whatever
Restoring Y Combinator's Xerox Alto, day 4: What's running on the system
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This post describes our continuing efforts to restore a Xerox Alto. We checked that the low-level microcode tasks are running correctly a...
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Restoring Y Combinator's Xerox Alto, day 3: Inside the disk drive
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I'm helping restore a Xerox Alto — a legendary minicomputer from 1973 that helped set the direction for personal computing. This post ...
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Restoring Y Combinator's Xerox Alto, day 2: Repairing the display
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This post describes how we repaired the monitor from a Xerox Alto. The Alto was a revolutionary computer, designed in 1973 at Xerox PARC ...
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"Hello world" in the BCPL language on the Xerox Alto simulator
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The first programming language for the Xerox Alto was BCPL, the language that led to C. This article shows how to write a BCPL "Hell...
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Inside the tiny RFID chip that runs San Francisco's "Bay to Breakers" race
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How does a tiny chip time the runners in the Bay to Breakers race? In this article, I take die photos of the RFID chip used to track ath...
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Restoring Y Combinator's Xerox Alto, day 1: Power supplies and disk interface
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A few days ago, I wrote about how I'm helping restore a Xerox Alto for Y Combinator. This new post describes the first day of restora...
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