Repairing the card reader for a 1960s mainframe: cams, relays and a clutch
I recently helped repair the card reader for the Computer History Museum's vintage IBM 1401 mainframe. In the process, I learned a lot abou...
The latest blog posts to take off on Hacker News. 3,229 posts.
I recently helped repair the card reader for the Computer History Museum's vintage IBM 1401 mainframe. In the process, I learned a lot abou...
Three years ago I came across an interesting paper written up by a Microsoft employee, Kent Sullivan, on the process and findings of designing the new user interface for Windows 95. The web page ha…
Breaking news: a credible solution to the Bouvet Island lifeboat mystery has been found. See comments for 22-27 May 2011, 12 November 2011, 17-20 March & 9 April 2016, and 28 December 2023. The…
The road to a solid-state switch was a long and complex one. It began with the discovery that certain materials behaved oddly with respect to electricity – differently than any existing theor…
I continue to enjoy seeing what can be done with WSL (Windows Subsystem for ...
It’s a brave man who tries to criticize Atari’s seminal groundbreaking game Tempest. More than any other classic arcade game, Tempest hit the arcade scene like a juggernaut. Nothing lik…
In late 2002, Byte.com decided to combat falling ad revenue by charging admission to its archives of computing content. I have first-hand experience tring to harvest enough revenue from the Internet to pay operating costs, and fully support Byte's decision to move to a subscription model. However, my BeView columns on…
This is the text version of a talk I gave on May 24, 2017, at the Front Trends conference in Warsaw.
When the Woolwich foot tunnel closed for repairs in 2011, it should have been a routine job. The pathway had been providing pedestrians with a quick route beneath the Thames since 1912. A century o…
IBM's vacuum tube computers of the 1950s were built from pluggable modules, each holding eight tubes and the associated components. I recent...
Robert O'Callahan. Christian. Kiwi. Software guy. All content human-authored unless otherwise noted.
What is the oldest x86 processor that is still supported by a modern Linux kernel in present time? I asked the above quiz question during the Geekcamp tech conference in Nov 2017 during my emcee role. The theoretical answer as you can glean from the title of this post is the 486 which was first released in 1989. I…
Major upheavals in printing technology, language, politics, and religion converged in the fourteenth century, setting the stage for a brand…
Most of the funding of research efforts I've been involved in since ARPA-Parc have been with various profit making companies -- Atari, Apple, Disney, HP, SAP, Infosys, etc. And there have been various kinds of compromises involved. And some good work on smaller scales did get done. Others of my colleagues in the…
According to the LISP 1.5 Programmer's Manual ISBN 0 262 13011 4, `A' and `D' stand for `address' and `decrement', as on page 36 it says:
A few weeks ago, I wanted to use one of the vintage IBM 1401 mainframe computers at the Computer History Museum, but the computer wasn't wor...
It’s well known that Konami doesn’t have complex protection on its arcade systems. Programmed World was a fan-made network replacement and update service for Konami arcade games with no support outside of Japan. Nothing of its scale and quality had been seen before, and nothing has been seen since, despite other…
Neural Network on a Commodore 64
This post is a slightly edited version of my November presentation to the San Francisco chapter of Papers We Love.
Let's have a look at the Apple Power Macintosh G5 , a weighty space heater that can also perform computing tasks. So weighty that it crea...
The FCC voted last Thursday to relax the rules for retiring copper wiring. This change was specifically aimed at Verizon and AT&T and is going to make it a lot easier for them to tear down old …
The 1973 Fourth Edition of the Unix Programmer’s Manual doesn’t seem to be available online in typeset form. This is how I managed to recreate it from its source code.
Taste the daily life of Romans with this recipe for Panis Quadratus: The infamous sectioned bread excavated at Pompeii and preserved for millenia after the eruption of Mount Vesuvius in 79 AD.
Link to original post on rajuabju.com Before I begin, let me state the following: This is my personal perspective of the history of Warez ...
The new Mayor of the city of Rome, Ignazio Marino, just announced his intention to destroy one of the city’s central roads, the Via dei Fori Imperiali, and turn the area around the old Roman Forum into the world’s largest archaeological park. Reactions have ranged from commuters’ groans to declarations from…