OSle – A 510 bytes OS in x86 assembly
(sorry about double posting, I forgot to put Show HN in front in the original https://news.ycombinator.com/item?id=43863689 thread) Hey all, As a follow up to my relatively successful series in x86 Assembly of last year[1], I started making an OS that fits in a boot sector. I am purposefully not doing chain loading or multi-stage to see how much I can squeeze out of 510bytes. It comes with a file system, a shell, and a simple process management. Enough to write non-trivial guest applications, like a text editor and even some games. It's a lot of fun! It comes with an SDK and…
OSle – A 510 bytes OS in x86 assembly launched on May 2, 2025 with 160 votes, #235 of 7,905 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 1 year on.
In plain words
OSle is a fully functional operating system written in x86 assembly that fits entirely within 510 bytes of a boot sector. It includes a file system, shell, and process management, allowing developers to create applications like text editors and games. The project targets programmers interested in low-level systems programming and assembly language, offering an SDK and browser-based sandbox for experimentation and learning about OS development.
written from the facts on this page · September 2026
From the sources
💾 A tiny and mighty boot sector OS. Contribute to shikaan/osle development by creating an account on GitHub.
OSle includes a tiny Software Development Kit (SDK) that includes definitions and a toolchain to create your own OSle C or x86 Assembly programs. Follow the step-by-step tutorial to write your first program! brew install nasm brew install i686-elf-gcc brew install bochs # optional, you can use Qemu if you prefer Linux Install dependencies using your local package manager, e.g., on Debian: apt install nasm gcc-i686-linux-gnu bochs # bochs is optional Build and Run OSle locally These recipes will compile OSle and use the SDK to compile and bundle all the pre-built programs. Using start will also run bochs right away. # build and run OSle on bochs make start # or # build osle make osle # use…from github.com
In the maker’s words, at launch
(sorry about double posting, I forgot to put Show HN in front in the original https://news.ycombinator.com/item?id=43863689 thread) Hey all, As a follow up to my relatively successful series in x86 Assembly of last year[1], I started making an OS that fits in a boot sector. I am purposefully not doing…
Does a similar job
all alternatives →
Homemade 32-bit CPU and OS (2015) [video]2016 · youtube.com · ▲253
I built a hardware processor that runs Python2025 · runpyxl.com · ▲983Hi everyone, I built PyXL — a hardware processor that executes a custom assembly generated from Python programs, without using a traditional interpreter or virtual machine. It compiles Python -> CPython Bytecode -> Instruction set designed for direct hardware execution. I’m sharing an early benchmark: a GPIO test where PyXL achieves a 480ns round-trip toggle — compared to 14-25 micro seconds on a MicroPython Pyboard - even though PyXL runs at a lower clock (100MHz vs. 168MHz). The design is stack-based, fully pipelined, and preserves Python's dynamic typing without static type restrictions.…
Banan-OS, an Unix-like operating system written from scratch2024 · github.com · ▲333This is my operating system that I've been working for the past 2 years. All of the code is written exclusively by me except from ported software. banan-os has a monolithic kernel targeting x86 (i686) and x86_64 architectures. The project consists of bootloader, kernel and userspace libraries (libc, libGUI, libFont, ...). It also uses my custom C++ standard library partly based on stdc++. Currently I have basic TTY and GUI environment with some of the basic UNIX utilities like cp, ls and stat. I have basic support for USB (keyboard/mouse/storage), disks (NVMe, AHCI), custom…
- IMI made my own OS from scratch because I was bored2025 · jotalea.com.ar · ▲224
I've wanted to make my own OS since I started programming. Now, 5 years later, I did it (kind of). Sure, it is really basic, has very little functionality, but I made it and I'm proud of that. Oh, and I'm just 16 btw.
A DOS-like hobby OS written in Rust and x86 assembly2025 · github.com · ▲207To try it out, simply build the project yourself from source, or use attached bootable ISO image of the system (in Releases on Github) and run it in QEMU. https://blog.vxn.dev/rou2exos-rusted-edition
I wrote an OS in 1000 lines of Zig2025 · github.com · ▲151A minimal RISC-V 32-bit OS written in Zig. Contribute to botirkhaltaev/pico-os development by creating an account on GitHub.
More dev tools this month
the category →
open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.
Dev tools · 28d ago · github.com
Contribute to reladraw/reladraw development by creating an account on GitHub.
Dev tools · 26d ago · github.com
OpenBot▲362Grok Bot alternative: free, local, open-source, multiplayer
Dev tools · 23d ago · openbot.run
Talanoa▲346Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…
Dev tools · 21d ago · talanoa.email
CoreSpeed▲332One MCP for everything your agents need: apps, memory, tools
Dev tools · 29d ago · corespeed.io
Source: Show HN post ↗ · launch text quoted in part
Launched alongside, May 2025
the whole month →
Tapflow 2.0▲1,125We built Tapflow for devs, designers, PMs, and tech folks who’ve been sitting on internal docs, templates, and systems — but never productized them. Upload a PDF, notes, or workshop deck, and Tapflow drafts a structured product (with chapters, teaser and pricing plans). It’s good for AI kits, onboarding guides, design systems, and frameworks. You can sell through Stripe, LemonSqueezy, or PayPal. Real-time collaboration is in early beta. No site builder, no LMS — clean design and just focused tools to ship. Fully bootstrapped and just launched on PH today →…
Work · 2025 · tapflow.ai
- C9
Life & fun · 2025 · felixrieseberg.github.io
Appwrite Sites▲990Appwrite 2.0 brings a new engine, a rebuilt Console, five database types, an S3 API, an OAuth 2.1 server, and organization-level Domains and Firewall.
Dev tools · 2025 · appwrite.io
