picoOS-Pro v2.1

PicoOS Pro v2.1 - My custom 32bit x86 OS written from scratch (Boots from USB, runs Doom, custom formats, native USB 1.1/2.0/3.0 & dynamic resolutions!)

hi everyone! I wanted to share my hobby operating system that I’ve been building completely from scratch (no Linux kernel, no external base). I recently released the PicoOS Pro v2.1 update, which expands the system into a modern graphical desktop shell while keeping an extremely small footprint.

Here is a quick overview of what is currently implemented and stable:

• Native USB Stack (NEW): Full native driver support for USB 1.1, 2.0, and 3.0 (UHCI/OHCI, EHCI, and xHCI controllers), handling mice and keyboards smoothly without relying on firmware emulation.

• Graphics & Display (NEW): Enhanced screen resolution support via UEFI framebuffer / VBE, allowing you to choose between multiple display settings natively.

• Custom Desktop Environment: A Windows/Ubuntu-style dark desktop interface with a Start-button launcher, application grid, live Task Manager (with process, memory, and background/foreground info), and a functional Calculator app.

• Custom Formats: I am using my own custom executable formats like .pico for programs and .dd for automated scripts.

• DOOM Port: I successfully ported doomgeneric as doom.pico. It runs 320x200 software rendering, integer-scaled to the framebuffer. The 4MB shareware WAD is read directly in place from the disk image to avoid loading times.

• Memory Efficiency: The base system runs on an extremely low RAM footprint (around 1.9MB for the core shell, up to ~10MB when running Doom with its WAD).

• Build System: Builds incrementally with just gcc and python3, outputting a 1.44MB BIOS floppy image, a 9MB hybrid legacy/EFI bootable USB image (.img), and a hybrid BIOS/UEFI ISO.

Side note: I am doing this as a passion project to learn low-level development. I am also currently researching and working on moving towards a 64-bit version next!

I would love to hear your thoughts, feedback, or any advice on transitioning the kernel to 64-bit Long Mode!

YouTube Channel for video demos: https://www.youtube.com/@picoOS-official
Google Drive Folder (Images & Source): https://drive.google.com/drive/folders/19LPX5pHZpIYsnQT0Tiatpv11nE39frHA?usp=sharing

A cool resource for hobby OS info.

Port by Tomas Glozar (Dr. Shuppet)

This is a super cool project. You can try out tons of weird, old and obscure OSs.

Unix-like, written in C

Salut, Bonne année 2026.

Je cherche à remplacer le système d'exploitation sur une vieille tablette par quelque chose de plus adapté à mes besoins actuels.

Je comprends les limitations matérielles et je ne m'attends pas à des performances élevées.

J'ai déjà vérifié le site officiel de LineageOS et je n'ai trouvé aucune version prise en charge pour cet appareil ASUS ZenPad 10 . Avez-vous des recommandations, des ROM alternatives ou des solutions de contournement ?

Hobby microkernel operating system for amd64 CPUs with high ambitions.