Seeing this run on real hardware is so satisfying, even if it’s just a small example. 😅

https://movq.de/v/ec46b8cf99/netbook.mp4

My little toy operating system from last year runs in 16-bit Real Mode (like DOS). Since I’ve recently figured out how to switch to 64-bit Long Mode right after BIOS boot, I now have a little program that performs this switch on my toy OS. It will load and run any x86-64 program, assuming it’s freestanding, a flat binary, and small enough (< 128 KiB code, only uses the first 2 MiB of memory).

Here I’m running a little C program (compiled using normal GCC, no Watcom trickery):

https://movq.de/v/b27ced6dcb/los86%2D64.mp4

https://movq.de/v/b27ced6dcb/c.png

Next steps could include:

• Use Rust instead of C for that 64-bit program?
  
• Provide interrupt service routines. (At the moment, it just keeps interrupts disabled.)

@thecanine@twtxt.net I see 🤔 Very cool though! 😎

@movq@www.uninformativ.de @prologic@twtxt.net Holy shit, this is sooo fucking cool! :-) Wow, I absolutely love it. It’s extremely fascinating what these optimizers do.

Woof, woof, @thecanine@twtxt.net! That’s cute.

Thank you! Merry Christmas! 🎄

@movq@www.uninformativ.de I have not, thanks! <3

@prologic@twtxt.net @movq@www.uninformativ.de Oh, I take my 0°C over the 36°C anytime! Even with yesterday’s gray and windy sleet in my face. However, there are definitely more pleasant times to walk in town, I’ll give you that. For example on 0°C sunny today: https://lyse.isobeef.org/waldspaziergang-2025-12-25/

@movq@www.uninformativ.de I watched a few of these thanks to you! Very cool shit™ 😎

In case you haven’t seen it yet:

Matt Godbolt’s “Advent of Compiler Optimisations”!

https://www.youtube.com/playlist?list=PL2HVqYf7If8cY4wLk7JUQ2f0JXY_xMQm2

@movq@www.uninformativ.de Ooof that’s chilly 🥶

@prologic@twtxt.net And I froze my ass off yesterday at -5°C and strong winds. 🤣

that’s a whopping 36°C today 🥵

@dce@hashnix.club merry Christmas to you too!

Merry Xmas!

@thecanine@twtxt.net Is it because you’ve used white pixels around it to sort of give it aht 3D look? 👀 Hmm? 🤔

@bender@twtxt.net It’s fun living in the future isn’t it 🤣

@prologic@twtxt.net merry Christmas! I keep forgetting you live in our future. 😅

👋 Merry Xmas 🎄 🎅

This one is a slightly more 3D looking, as well as the first one, with the tail swirled.

Image

@movq@www.uninformativ.de Hahaha, this is hilarious! :‘-D

Lab report: Reading a 4th Edition Research Unix tape image on Plan 9 — http://a.9srv.net/reports/index.html#v4

@prologic@twtxt.net 🎄 Merry Christmas and stuff 😅🎅

@lyse@lyse.isobeef.org Lovely! We also just had some snow. 😃 Not a lot, but still. 😅

(Lol, I totally read that as “rootfs”. 🤪)

👋 Merry (2025) Xmas y’all 🎄 Ho ho ho! 🎅

@movq@www.uninformativ.de Only the roofs are a little white. It’s also windy here. https://lyse.isobeef.org/weisse-weihnachten-2025-12-24/01.jpg

@lyse@lyse.isobeef.org Oooh, nice! ⛄ We only have cold stormy weather over here. 🥴

Indeed, tiny, tiny snowflakes coming down.

Oh, that’s cute: https://movq.de/v/046fb6ee70/s.png DuckDuckGo puts a little helmet on the duck when you search for Skyrim. (Katria is a Skyrim character.)

@lyse@lyse.isobeef.org Thanks. 😅 (Do I say that? The WM can’t answer. 🤣)

@zvava@twtxt.net I might misunderstand what you wrote, but only hashing the message once and storing the hash together with the message in the database seems a way better approch to me. It’s fixed and doesn’t change, so there’s no need to recompute it during runtime over and over and over again. You just have it. And can easily look up other messages by hash.

Happy birthday Katrina! https://www.uninformativ.de/blog/postings/2025-12-23/0/POSTING-en.html :-)

very good blog post that reminded me why it’s taking so long to ship bbycll — previously i had computed the hashes of every post before storing them in the database, after realizing it’s a much better idea to compute the hashes during runtime and only store the post content & timestamp i’m now having to rewrite every function that reads & writes data. i hope the reason as to why i lost motivation is obvious — thankfully i caught it early enough so that once i’m done rewriting just those functions i should™ be able to finalize 1.0-rc with little hassle

⇒ the cardinal sin of software architecture: the unnecessary distribution, replication, or restructuring of state, both in space and time.

Oh wow, there might be snow tomorrow! Probably not much, though. Let’s see.

@movq@www.uninformativ.de Maybe there’s another meaning I’m not aware of, but this doesn’t look like a shitpost to me. Congrats, I guess. ;-)

Mastodon has a “Wrapstodon 2025” now, showing you a “wrap up” of the year. Of course, a pointless funny shitpost was my most “successful” post in 2025. 😂

https://movq.de/v/b9cf9e3ca0/s.png

I just had a closer look at https://git.mills.io/prologic/mu and it motivated me to do some compiler building myself again. Hopefully, I find some time in the next free days. I’m bad at it, but it’s always great fun.

Oh great, I received an e-mail that my SMTP credentials have been exposed. Once again, just another shitty scanner that generates garbage reports from tests it doesn’t understand. Thank you for nothing!

conf := &Config{
    SMTPHost: "smtp.example.com",
    SMTPPort: 587,
    SMTPUser: "user",
    SMTPPass: "hunter2",
    SMTPFrom: "from@example.com",
}

@prologic@twtxt.net I’ve been awake at that time, didn’t notice anything. 🤔 Where was that BGP analyzer again … 😅 There’s a tool that keeps track of these things, right? I forgot what it was.

@prologic@twtxt.net @movq@www.uninformativ.de A crocodile had bitten the big submarine internet cable that connects Australia to Europe. The investigations revealed that some construction work last week accidentally tore up the protective layer around it. That went unnoticed, unfortunately, so marine life had an easy job today. For just 40 minutes, they were quite fast in repairing the damage if you ask me! These communication cables are fricking large.

Just kidding, I completely made that up. :-D I didn’t notice any outage either. But I didn’t try to connect to Down Under at the time span in question.

@movq@www.uninformativ.de From 2:50 PM to 3:23 PM AEST (+10 UTC) there was an outage. Everything went “up” on Down Detector, my EU region went offline, numerous sites were unavailable, and so on. Basically everything to/from the EU appeared to basically go kaput.

@prologic@twtxt.net Hm, I didn’t notice anything. Perhaps I was asleep? 😅

Hey EU friends 👋 wtf happened to the EU Internet today for about 40 minutes or so?

@movq@www.uninformativ.de Very nice! I often wish other languages had something similar. Sometimes, I use lambdas, but that also looks ugly and feels a bit like a misuse. Other times, just the normal blocks are enough, but it’s not the same. Especially with the mutability aspects as the article explains. Typically, I just put it in a function or ignore it if it’s just a few lines.

@movq@www.uninformativ.de Ah, cool! :-) Yeah, it’s very wild what is happening under the hood all the time.

@prologic@twtxt.net You write so much code … it’s incredible. 😅

This feels useful: Rust’s Block Pattern

@lyse@lyse.isobeef.org These tables get shuffled around every time your OS switches to another process. It’s crazy that so much is going on behind the scenes.

@lyse@lyse.isobeef.org I was surprised by that as well. 😅 I thought these were features that you can use, but no, you must do all this.

By the way, I now fixed the issue that I mentioned at the end and it works on the netbook now. 🥳

https://www.uninformativ.de/blog/postings/2025-12-21/0/netbook.jpg

Wow, @movq@www.uninformativ.de, so many tables. No idea what I expected (I’m totally clueless on this low-level stuff), but that was quite an interesting surprise to me. https://www.uninformativ.de/blog/postings/2025-12-21/0/POSTING-en.html