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Writing an operating system kernel from scratch – RISC-V/OpenSBI/Zig

https://popovicu.com/posts/writing-an-operating-system-kernel-from-scratch/
52•popovicu•2d ago

Comments

popovicu•2d ago
I have redone the classical exercise of writing a tiny OS kernel with time sharing, which manages a couple of user threads. My goal was to experiment specifically on RISC-V + OpenSBI. Additionally, I wanted to explore Zig a little bit, so that was the language used instead of the traditional C, but it should be straightforward how to do the same experiment in either C or Rust.

It's definitely very rough around the edges, and it's more of an experiment and an intro for people who want to go through step 0 of learning OS kernel development and computer architecture. Nevertheless, I hope it is still a fun experimental thing to play with over the weekend!

The full walkthrough and the GitHub link are available at the link posted!

geoffbp•6m ago
Wasn’t this posted last week ?

Shai-Hulud malware attack: Tinycolor and over 40 NPM packages compromised

https://www.stepsecurity.io/blog/ctrl-tinycolor-and-40-npm-packages-compromised
574•jamesberthoty•8h ago•410 comments

Things you can do with a Software Defined Radio (2024)

https://blinry.org/50-things-with-sdr/
404•mihau•5h ago•88 comments

How to make the Framework Desktop run even quieter

https://noctua.at/en/how-to-make-the-framework-desktop-run-even-quieter
36•lwhsiao•1h ago•4 comments

Waymo has received our pilot permit allowing for commercial operations at SFO

https://waymo.com/blog/#short-all-systems-go-at-sfo-waymo-has-received-our-pilot-permit
388•ChrisArchitect•3h ago•304 comments

Denmark close to wiping out cancer-causing HPV strains after vaccine roll-out

https://www.gavi.org/vaccineswork/denmark-close-wiping-out-leading-cancer-causing-hpv-strains-aft...
90•slu•1h ago•24 comments

Meta RayBan AR Glasses Shows Lumus Waveguide Structures in Leaked Video

https://kguttag.com/2025/09/16/meta-rayban-ar-glasses-shows-lumus-waveguide-structures-in-leaked-...
24•speckx•1h ago•1 comments

How Container Filesystem Works: Building a Docker-Like Container from Scratch

https://labs.iximiuz.com/tutorials/container-filesystem-from-scratch
28•lgunsch•3d ago•1 comments

I built my own phone because innovation is sad rn [video]

https://www.youtube.com/watch?v=qy_9w_c2ub0
62•Timothee•1d ago•12 comments

Plugin System

https://iina.io/plugins/
99•xnhbx•3h ago•21 comments

Launch HN: Rowboat (YC S24) – Open-source IDE for multi-agent systems

https://github.com/rowboatlabs/rowboat
34•segmenta•2h ago•16 comments

A new experimental Google app for Windows

https://blog.google/products/search/google-app-windows-labs/
76•meetpateltech•4h ago•116 comments

Bertrand Russell to Oswald Mosley (1962)

https://lettersofnote.com/2016/02/02/every-ounce-of-my-energy/
123•giraffe_lady•3h ago•61 comments

CIA Freedom of Information Act Electronic Reading Room

https://www.cia.gov/readingroom
125•bookofjoe•6h ago•25 comments

UTF-8 history (2003)

https://doc.cat-v.org/bell_labs/utf-8_history
69•mikecarlton•3d ago•24 comments

If We Want Bigger Wind Turbines, We're Gonna Need Bigger Airplanes

https://spectrum.ieee.org/wind-turbine-blade-transport-plane
28•Brajeshwar•3d ago•23 comments

Adios Chicos, 25 Years of KDE

https://jriddell.org/2025/09/14/adios-chicos-25-years-of-kde/
101•thangqt•1h ago•20 comments

Scammed out of $130K via fake Google call, spoofed Google email and auth sync

https://bewildered.substack.com/p/i-was-scammed-out-of-130000-and-google
104•davidscoville•2h ago•210 comments

Writing an operating system kernel from scratch – RISC-V/OpenSBI/Zig

https://popovicu.com/posts/writing-an-operating-system-kernel-from-scratch/
53•popovicu•2d ago•2 comments

Top UN legal investigators conclude Israel is guilty of genocide in Gaza

https://www.middleeasteye.net/news/un-concludes-israel-guilty-genocide-gaza
141•Qem•11h ago•59 comments

Implicit ODE Solvers Are Not Universally More Robust Than Explicit ODE Solvers

https://www.stochasticlifestyle.com/implicit-ode-solvers-are-not-universally-more-robust-than-exp...
74•cbolton•6h ago•22 comments

Development of the MOS Technology 6502: A Historical Perspective (2022)

https://www.EmbeddedRelated.com/showarticle/1453.php
36•jason_s•4h ago•7 comments

The Linux Process Journey (2023) [pdf]

https://thelearningjourneyebooks.com/wp-content/uploads/2023/09/TheLinuxProcessJourney_v6_Sep2023...
16•maxmoehl•1h ago•0 comments

Paper Folding Assembly Line [video]

https://www.youtube.com/watch?v=XhUuhl9iWpQ
24•peteforde•1w ago•4 comments

Generative AI as Seniority-Biased Technological Change

https://papers.ssrn.com/sol3/papers.cfm?abstract_id=5425555
184•zeuch•6h ago•159 comments

60 years after Gemini, newly processed images reveal details

https://arstechnica.com/space/2025/09/60-years-after-gemini-newly-processed-images-reveal-incredi...
225•sohkamyung•3d ago•64 comments

Microsoft Favors Anthropic over OpenAI for Visual Studio Code

https://www.theverge.com/report/778641/microsoft-visual-studio-code-anthropic-claude-4
152•corvad•4h ago•79 comments

Will I run Boston 2026?

https://getfast.ai/blogs/boston-2026
31•steadyelk•3h ago•30 comments

Java 25 officially released

https://mail.openjdk.org/pipermail/announce/2025-September/000360.html
219•mkurz•6h ago•106 comments

Teen safety, freedom, and privacy

https://openai.com/index/teen-safety-freedom-and-privacy
67•meetpateltech•6h ago•88 comments

Scientists uncover extreme life inside the Arctic ice

https://news.stanford.edu/stories/2025/09/extreme-life-arctic-ice-diatoms-ecological-discovery
69•hhs•3d ago•24 comments