Ken Shirriff's blog

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

A CT scanner reveals surprises inside the 386 processor's ceramic package

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Intel released the 386 processor in 1985, the first 32-bit chip in the x86 line. This chip was packaged in a ceramic square with 132 gold-pl...
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How to reverse engineer an analog chip: the TDA7000 FM radio receiver

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Have you ever wanted to reverse engineer an analog chip from a die photo? Wanted to understand what's inside the "black box" o...
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Reverse engineering the mysterious Up-Data Link Test Set from Apollo

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Back in 2021, a collector friend of ours was visiting a dusty warehouse in search of Apollo-era communications equipment. A box with NASA-st...
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