Skip to content

Ken Shirriff's blog

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

  • By Ken Shirriff
  • Based in United States of America
  • Roughly two posts per month

Posts per month

Data for this chart is available in the table below
Posts per month
Month starting Posts
Jan 2023 8
Feb 2023 5
Mar 2023 4
Apr 2023 2
May 2023 1
Jun 2023 0
Jul 2023 3
Aug 2023 2
Sep 2023 1
Oct 2023 3
Nov 2023 2
Dec 2023 4
Jan 2024 3
Feb 2024 3
Mar 2024 2
Apr 2024 1
May 2024 1
Jun 2024 1
Jul 2024 2

Any gaps could be due to errors when fetching the blog’s feed.

Most recent posts

Inside an IBM/Motorola mainframe controller chip from 1981
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 mainframes. (I didn't completely analyze the chip, so …
On , by Ken Shirriff, 2,871 words
Standard cells: Looking at individual gates in the Pentium processor
Intel released the powerful Pentium processor in 1993, a chip to "separate the really power-hungry folks from ordinary mortals." The original Pentium was followed by the Pentium Pro, the Pentium II, and others, spawning a …
On , by Ken Shirriff, 5,554 words
Inside the tiny chip that powers Montreal subway tickets
To use the Montreal subway (the Métro), you tap a paper ticket against the turnstile and it opens. The ticket works through a system called NFC, but what's happening internally? How does the ticket work …
On , by Ken Shirriff, 4,479 words