Ken Shirriff's blog
- 2026-08-30: Cores in space: The core memory module from a 1980 Spacelab computer
- 2026-07-31: Energizing a vacuum-tube flip-flop module from a 1948 IBM system
- 2026-06-28: Examining circuit boards from the Space Shuttle's I/O Processor
- 2026-06-13: The adder at the heart of Intel's 8087 floating-point chip
- 2026-06-07: Powering up a module from the IBM 604: an electronic calculator from 1948
- 2026-05-30: Microcode inside the Intel 8087 floating-point chip: register exchange
- 2026-05-23: Reverse engineering circuitry in a Spacelab computer from 1980
- 2026-04-18: The electromechanical angle computer inside the B-52 bomber's star tracker
- 2026-03-29: The rise and fall of IBM's 4 Pi aerospace computers: an illustrated history
- 2026-02-14: Instruction decoding in the Intel 8087 floating-point chip
- 2026-01-23: Notes on the Intel 8086 processor's arithmetic-logic unit
- 2025-12-30: Conditions in the Intel 8087 floating-point chip's microcode
- 2025-12-09: The stack circuitry of the Intel 8087 floating point chip, reverse-engineered
- 2025-11-22: Unusual circuits in the Intel 386's standard cell logic
- 2025-10-18: Solving the NYTimes Pips puzzle with a constraint solver
- 2025-09-06: A Navajo weaving of an integrated circuit: the 555 timer
- 2025-08-18: Why do people keep writing about the imaginary compound Cr2Gr2Te6?
- 2025-08-17: Here be dragons: Preventing static damage, latchup, and metastability in the 386
- 2025-08-09: A CT scanner reveals surprises inside the 386 processor's ceramic package
- 2025-08-02: How to reverse engineer an analog chip: the TDA7000 FM radio receiver
- 2025-07-21: Reverse engineering the mysterious Up-Data Link Test Set from Apollo
- 2025-06-14: Inside the Apollo "8-Ball" FDAI (Flight Director / Attitude Indicator)
- 2025-05-10: Reverse engineering the 386 processor's prefetch queue circuitry
- 2025-05-01: The absurdly complicated circuitry for the 386 processor's registers
- 2025-04-13: A tricky Commodore PET repair: tracking down 6 1/2 bad chips
End of feed.