Ken Shirriff's blog

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

Reverse engineering the 59-pound printer onboard the Space Shuttle

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The Space Shuttle contained a bulky printer so the astronauts could receive procedures, mission plans, weather reports, crew activity plans,...
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Inside an IBM/Motorola mainframe controller chip from 1981

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In this article, I look inside a chip in the IBM 3274 Control Unit. 1 But before I discuss the chip, I need to give some background on main...
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Standard cells: Looking at individual gates in the Pentium processor

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Intel released the powerful Pentium processor in 1993, a chip to "separate the really power-hungry folks from ordinary mortals." ...
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