Ken Shirriff's blog
Xerox Alto restoration, IC reverse engineering, chargers, and whatever
HP Nanoprocessor part II: Reverse-engineering the circuits from the masks
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In 1974, Hewlett-Packard developed a microprocessor for control applications in their products, from floppy disk drives to voltmeters. Thi...
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Reverse-engineering the first FPGA chip, the XC2064
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A Field-Programmable Gate Array (FPGA) can implement arbitrary digital logic, anything from a microprocessor to a video generator or crypt...
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Inside the HP Nanoprocessor: a high-speed processor that can't even add
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The Nanoprocessor is a mostly-forgotten processor developed by Hewlett-Packard in 1974 1 as a microcontroller 2 for their products. Stra...
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