Hamming error-correcting codes

Debugging USB-Code via JTAG

The Espressif ESP32S3 is a marvellous MCU. One of its best features is the included USB controller that also features internal JTAG/USB debugging without any external equipment. Naturally for this to work the USB controller has to be in JTAG mode. Just recently though I had to debug an issue where my firmware puts the USB controller into USB-NCM (Ethernet over USB) mode, thus JTAG via USB was no option. For such a case, you need an external JTAG programmer like Espressif's ESP-PROG. Here are the steps you need to do in order to make this work. The end result...

Build a game like C64 classic Trailblazer in Three.js using TypeScript, with a lot of room for customization

First step in the creation of a HTML5 Trailblazer game using Three.js and TypeScript. Track movement, fake shadow and controls. Commented source code available.

FastCGI library

Making a “Hello World” Program For a Quantum Computer (Part 2)

Let’s Do Some Weird Stuff

Continue reading on Level Up Coding »

A Firefox addon for putting prices into perspective

I had a fun idea for a small project this weekend, and so I quickly put it together over the couple of days. The result is Price Perspective.

Humor me: have you ever bought something, considered the price, and wondered how that price would look to someone else? Someone in the developing world, or a billionaire, or just your friend in Australia? In other words, can we develop an intuition for purchasing power?

The Price Perspective add-on answers these questions. Let’s consider an example: my income is sufficient to buy myself a delivery pizza for dinner without a second thought. How much work does it take for someone...

Using linkhut to signal-boost my bookmarks

It must have been at least a year ago that I first noticed linkhut, and its flagship instance at ln.ht, appear on SourceHut, where it immediately caught my attention for its good taste in inspirations. Once upon a time, I had a Pinboard account, which is a similar concept, but I never used it for anything in the end. When I saw linkhut I had a similar experience: I signed up and played with it for a few minutes before moving on.

I’ve been rethinking my relationship social media lately, as some may have inferred from my unannounced disappearance from Mastodon.1 While reflecting on this again recently, in...

Making a “Hello World” Program For a Quantum Computer

Let’s Do Some Weird Stuff

Continue reading on Level Up Coding »

Please stop externalizing your costs directly into my face

This blog post is expressing personal experiences and opinions and doesn’t reflect any official policies of SourceHut.

Over the past few months, instead of working on our priorities at SourceHut, I have spent anywhere from 20-100% of my time in any given week mitigating hyper-aggressive LLM crawlers at scale. This isn’t the first time SourceHut has been at the wrong end of some malicious bullshit or paid someone else’s externalized costs – every couple of years someone invents a new way of ruining my day.

Four years ago, we decided to require payment to use our CI services because it was being abused to mine cryptocurrency. We alternated between periods...

Device-Generated Commands at Vulkanised 2025

https://invidious.privacyredirect.com/watch?v=8FCgLGa76yU

A month ago I attended Vulkanised 2025 in Cambridge, UK, to present a talk about Device-Generated Commands in Vulkan. The event was organized by Khronos and took place in the Arm Cambridge office. The talk I presented was similar to the one from XDC 2024, but instead of being a lightning 5-minutes talk, I had 25-30 minutes to present and I could expand the contents to contain proper explanations of almost all major DGC concepts that appear in the spec.

I attended the event together with my Igalia colleagues Lucas Fryzek and Stéphane Cerveau, who presented about lavapipe and Vulkan Video, respectively. We had...