intel-386

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Unusual circuits in the Intel 386's standard cell logic

Ken Shirriff · 2025-11-22 Cached

An exploration of unusual circuits found in the Intel 386's standard cell logic, including large multiplexers and non-standard inverters, highlighting the chip's design history and place-and-route techniques.

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#intel-386

Here be dragons: Preventing static damage, latchup, and metastability in the 386

Ken Shirriff · 2025-08-17 Cached

A detailed reverse-engineering analysis of the Intel 386 processor's I/O circuitry, explaining how it handles static electricity, latchup, and metastability to protect the chip.

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

Ken Shirriff · 2025-08-09 Cached

A CT scan of the Intel 386 processor's ceramic package reveals complex internal wiring, multiple power networks, and layered interconnect design, offering a rare look at the packaging technology of the 1985 chip.

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