Julio Merino
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jmmv.dev
Julio Merino
@jmmv.dev
Operating systems, build systems, and programming languages. Mostly Unix, Bazel, and Rust. Author of Blog System/5. Creator of EndBASIC, and more. https://jmmv.dev/
The recording of my EndBASIC talk at BSDCan 2025 is now available: www.youtube.com/watch?v=WZFY... — Watch to learn about the inner makings of the "EndBASIC OS" RPI disk image. Thanks to the A/V team for getting it out!
An embedded dev kit for EndBASIC with NetBSD by Julio Merino
YouTube video by BSDCan
www.youtube.com
September 3, 2025 at 12:34 PM
It was at the bottom of the thread… because I only wrote the article after I saw so much interest in the original post.
September 2, 2025 at 10:13 PM
Or you can just head to the full article, which is more elaborate and less click-bait-y than my original X thread: jmmv.dev/2023/06/fast...
Fast machines, slow machines - Julio Merino (jmmv.dev)
Well, that was unexpected. I recorded a couple of crappy videos in 5 minutes, posted them on a Twitter thread, and went viral with 8.8K likes at this point. I really could not have predicted that, giv...
jmmv.dev
September 2, 2025 at 8:57 PM
Vaya, si, lo fue! Gracias! Pero Debian celebra cumpleaños de FreeBSD? 😂
September 2, 2025 at 1:04 PM
Thanks! And nope. Blaze did, but Bazel's RE client does not have that feature. "Shouldn't be too hard to implement" conceptually, but knowing the RE client code, I think it is probably non-trivial...
July 23, 2025 at 6:58 PM
Happy Friday! The instructions to build your very own EndBASIC microcomputer (aka the EndBOX), including links to components AND the very first public disk images 😱, are now available. Have fun! www.endbasic.dev/2025/07/endb...
EndBOX DIY kit now available - EndBASIC
Components to build the EndBOX I and the assembled EndBOX I Micro. About a month ago, I officially unveiled the EndBOX: a retro-style micro-computer designed to run the EndBOX OS. And what is the EndB...
www.endbasic.dev
July 11, 2025 at 3:23 PM
Instructions for the DIY kit ready and the very first release builds are in the oven. Interested in early, privileged access? coff.ee/jmmv !
July 3, 2025 at 1:53 AM
Work on the EndBOX continues (and you've seen some of it via tweets here), so... here is the first weekly progress report! buymeacoffee.com/jmmv/weekly-...
Weekly progress report: 2025-06-22 — Julio Merino
Post by Julio Merino
buymeacoffee.com
June 22, 2025 at 5:26 PM
TIL about Tildes. Do any of you have an invite? I see the EndBOX has been shared there and I ought to engage!
June 8, 2025 at 1:50 AM
My talk about the OS powering the EndBOX is coming quick next week, so I had to rush getting this out so... I guess it's official now? www.endbasic.dev/2025/06/unve... Join me in this craziness and let's make it happen!
Unveiling the EndBOX - EndBASIC
Remember when turning a computer on meant instantly jumping into code? No bloat, no distractions—just you and a prompt? That’s the experience I’ve been working to bring back with the EndBOX: a small, ...
www.endbasic.dev
June 6, 2025 at 5:28 PM
This shall be the next piece of hardware to add support for!

But… after the conference, and finishing the plan on what to actually do about producing this box “for real”.
June 5, 2025 at 2:38 AM
Time to resurface this! I found a draft update I prepared on Nov 8th to fix the text around username mapping and I published it now. I could not publish it back then because the CDN involved was being dumb and silently banned my updates due to a "dangerous substring".
June 3, 2025 at 11:59 PM
Ooooh look! Someone is featuring EndBASIC in their Game Development summer course! moosadee.gitlab.io/courses/camp...
Getting Started with Game Development
moosadee.gitlab.io
June 3, 2025 at 6:05 PM
And here it is in its “true” form! Now, if I got Bluetooth working and easily configurable via CONFIG.BAS, I could remove an extra cable.
June 1, 2025 at 10:36 PM
After ALL morning of fighting DTBs, I finally got the WiFi on the Pi Zero 2 W to work on NetBSD. Perfect for showtime at BSDCan.
June 1, 2025 at 6:52 PM
The EndBASIC dev kit presentation for BSDCan ain't gonna write itself. Two weeks to go!
May 31, 2025 at 2:59 AM
I've been tinkering with 3D printing as a complete beginner for the last two weeks as you may have seen around here, so I wrote a thing. jmmv.dev/2025/05/begi...
Beginning 3D printing - Julio Merino (jmmv.dev)
Hello readers and sorry for the 2-month radio silence. I’ve been pretty busy at work, traveling during school breaks, hacking on EndBASIC when time permitted, and… as of two weeks ago… tinkering with ...
jmmv.dev
May 28, 2025 at 4:20 PM
‪Let’s play snake? Is it too slow? Too fast? No problem, we can tweak it!‬
May 24, 2025 at 5:57 AM
I’m new to this stuff 😅 I tried adding a brim this time and it didn’t help, but I just watched a video that gave me various other ideas to fix it!
May 24, 2025 at 12:30 AM
It’s the weekend again so it’s time to continue iterating! Looking better now, I think? ☺️

… but the base warped again and I need to do some internal tweaks. Each iteration takes about 12 hours to print which doesn’t make it easy…
May 24, 2025 at 12:05 AM
Have you played VVVVVV? Did you know that its soundtrack is called PPPPPP? And... did you know that there is a metal remix called MMMMMM? I did not know the later and discovered it via the orange site! Amazing stuff. open.spotify.com/album/67mFUe...
Mmmmmm
Familyjules7x · Album · 2014 · 19 songs
open.spotify.com
May 9, 2025 at 8:30 PM
And now, with power!
May 9, 2025 at 4:43 AM
Not too bad for a first attempt though! All inner supports broke, but superglue to the rescue.
May 9, 2025 at 1:51 AM
Second attempt seems better, but I still don’t know if the box works. Printed by a friend (hi Daniel!).
May 7, 2025 at 2:29 PM
First printing attempt: failed. One piece was above the work plane. So much laughing when I saw this…
May 7, 2025 at 2:28 PM