The adder at the heart of Intel's 8087 floating-point chip

In 1980, Intel released the Intel 8087 floating-point coprocessor, a chip that could make math up to 100 times faster. As well as arithmetic and square roots, the 8087 computed transcendental functions including tangent, exponentiation, and logarithms. But it all depended on a 69-bit adder: "The arithmetic heart of the floating-point execution unit is centered about a nanomachine comprised of the…

Read more →
E
Mediawiki-feeds revisited

Murdoch
2026 June 9 (Tuesday), 2:18PM

· mediawiki-feeds · RSS · Toolforge · Wikimedia ·

Yesterday someone
messaged me about an issue with a wonky little tool I
wrote ten years ago. I actually the thing, because it creates feeds for a couple of things I follow on wikis, but as is often the way with RSS-related code I'd forgotten all about it — it just keeps working and doesn't need any…

Read more →
E
MediaWiki Feeds revisited

Murdoch
2026 June 9 (Tuesday), 2:18PM

· mediawiki-feeds · RSS · Toolforge · Wikimedia ·

Yesterday someone
messaged me about an issue with a wonky little tool I
wrote ten years ago. I actually the thing, because it creates feeds for a couple of things I follow on wikis, but as is often the way with RSS-related code I'd forgotten all about it — it just keeps working and doesn't need any…

Read more →
Powering up a module from the IBM 604: an electronic calculator from 1948

1948 was an interesting time for computing. For decades, businesses had used punch card equipment that added and sorted electromechanically. Now these electromechanical relays and counting wheels were being used to build room-filling general-purpose computers such as Harvard Mark I (1944) and IBM's SSEC (1948). But slow electromechanical mechanisms were already becoming obsolete. World War II had…

Read more →
Royal Statistical Society Discussion on Randomization vs Model Based Inference July 1, 2026

@Stephen announced on LinkedIn he is presenting his paper on randomization vs model based inference before the Royal Statistical Society on July 1, 2026. I thought participants here would be interested, as it will also be presented online.

Event info and a link to the preprint can be found here:

RSS

Discussion paper meetings

Next Discussion Meeting
‘Randomisation in Clinical Trials:…

Read more →
Microcode inside the Intel 8087 floating-point chip: register exchange

In 1980, Intel introduced the 8087 floating-point chip, a co-processor that made floating-point operations up to 100 times faster. This chip was highly influential, and today most processors use the floating-point standard introduced by the 8087.

The 8087 uses complicated algorithms to accurately compute functions such as square roots, tangents, and exponentials. These algorithms are implemented…

Read more →
Reverse engineering circuitry in a Spacelab computer from 1980

Spacelab was a reusable laboratory that could be carried in the cargo bay of the Space Shuttle, providing lab space for astronauts and experiments. Spacelab was controlled by a French-built minicomputer, called the _Mitra 125 MS_. Unlike modern computers, this computer didn't contain a microprocessor chip. Instead, its 16-bit processor was constructed from several boards of chips. In this…

Read more →
Lingthusiasm Episode 116: Cross-cultural communication (in space!)

lingthusiasm:

Sometimes, you’re talking with someone and you just seem to click. Other times, you just can’t seem to get comfortable: they’re standing too close or too far away for comfort, making too much or too little eye contact, touching or not touching you in a way that just doesn’t quite feel right. But where do our senses of what feels comfortable in a conversation come from, and how…

Read more →
RSS leader, former Indian army chief call for dialogue with Pakistan

A senior leader of India’s Rashtriya Swayamsevak Sangh (RSS) and former Indian Army chief Manoj Mukund Naravane have called for keeping diplomatic channels open with Pakistan, urging continued dialogue despite strained bilateral relations. RSS General Secretary Dattatreya Hosabale said India should remain prepared to engage with Pakistan through diplomacy, trade and people-to-people contact. RSS…

Consider this Ethical Publishing Stack and Workflow for your Site, Blog, or Newsletter

This article originally appeared on The Fulcrum. I published an article on Symfony Station (now sunset) years ago, titled Need a Writing Stack and Workflow for a Tech Newsletter or Blog?. It did not concern Symfony or PHP directly. However, it was still related. We wanted to be the best source for news on the...

Read more →
Lingthusiasm Episode 115: The long shadow of Daisy Bates with This Guy Sucked

lingthusiasm:

What do you do when the only records that remain of a language were made by someone who had absolutely horrendous views of the people who spoke it?

In this episode, your host Lauren Gawne gets enthusiastic about a crossover episode with Claire Aubin of This Guy Sucked! Lauren’s Guy who Sucked is Daisy Bates, who did a lot of early 20th century work documenting over 100…

Read more →
I started a photo blog

I have decided to start a photo blog. This is a place for me to post photos I want to share whilst avoiding all the nasties of the modern internet.

Find my photo blog at https://photos.jamesleighton.com and enjoy! You can follow using RSS, Bluesky, or Mastodon (@photos.jamesleighton.com@web.brid.gy)


This is post 27 of #100DaysToOffload.


To respond on your own website, write a…

Read more →
Page 1 Older →