Ken Shirriff's blog righto.com

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

Notes on the Intel 8086 processor's arithmetic-logic unit
righto.com·3w·
Discuss: Lobsters, Hacker News, Blogger
Conditions in the Intel 8087 floating-point chip's microcode
righto.com·6w·
Discuss: Blogger, Lobsters
The stack circuitry of the Intel 8087 floating point chip, reverse-engineered
righto.com·9w·
Discuss: Blogger
Unusual circuits in the Intel 386's standard cell logic
righto.com·12w·
Discuss: Blogger
Solving the NYTimes Pips puzzle with a constraint solver
righto.com·17w·
Discuss: Blogger, Lobsters
A Navajo weaving of an integrated circuit: the 555 timer
righto.com·23w·
Discuss: Blogger
Why do people keep writing about the imaginary compound Cr2Gr2Te6?
righto.com·25w·
Discuss: Blogger
Here be dragons: Preventing static damage, latchup, and metastability in the 386
righto.com·25w·
Discuss: Blogger, Lobsters, Hacker News
A CT scanner reveals surprises inside the 386 processor's ceramic package
righto.com·27w·
Discuss: Blogger, Lobsters
How to reverse engineer an analog chip: the TDA7000 FM radio receiver
righto.com·28w·
Discuss: Blogger, Lobsters
Reverse engineering the mysterious Up-Data Link Test Set from Apollo
righto.com·29w·
Discuss: Blogger
Inside the Apollo "8-Ball" FDAI (Flight Director / Attitude Indicator)
righto.com·35w·
Discuss: Blogger, Lobsters
Reverse engineering the 386 processor's prefetch queue circuitry
righto.com·40w·
Discuss: Blogger, Lobsters, Hacker News
The absurdly complicated circuitry for the 386 processor's registers
righto.com·41w·
Discuss: Blogger, Lobsters
A tricky Commodore PET repair: tracking down 6 1/2 bad chips
righto.com·43w·
Discuss: Blogger, Lobsters, Hacker News
Notes on the Pentium's microcode circuitry
righto.com·45w·
Discuss: Blogger, Lobsters
A USB interface to the "Mother of All Demos" keyset
righto.com·46w·
Discuss: Blogger, Lobsters
The Pentium contains a complicated circuit to multiply by three
righto.com·49w·
Discuss: Blogger, Lobsters
The origin and unexpected evolution of the word "mainframe"
righto.com·53w·
Discuss: Blogger
Interesting BiCMOS circuits in the Pentium, reverse-engineered
righto.com·55w·
Discuss: Blogger, Lobsters

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