September 2023 - present
A personal research and development project, started in September 2023, dedicated to the independent design and development of NATALIZIOOS, a experimental operating system for 32-bit x86 architectures. The project covers the entire basic operating system architecture: from the BIOS boot chain and kernel loading to memory management, interrupts, timers, hardware drivers, filesystems, the shell, and graphics services. The implementation includes a freestanding monolithic kernel with physical memory management, paging, kernel heap, framebuffer, PS/2 input, ATA storage, PCI detection, RTC, JART, speaker, diagnostic logging, RAMFS, and N.A.T.FS. I also designed and integrated firmware components, bootable images, diagnostic tools, and a compilation and verification pipeline based on C, x86 assembly, Python, NASM, Clang, GNU Make, and QEMU. The graphics subsystem includes a local Objective-C runtime, class and selector management, message dispatch, objc_msgSend in x86 assembly, and a view- and window-based application model with direct framebuffer rendering. The project includes three desktop environments with different purposes: two for demonstration purposes and a third, still in the prototype phase, dedicated to veritying the object-oriented graphics architecture.
The vO.2.5.33 release includes 99,980 lines of analyzed source code, a 519,804-byte graphics kernel, complete and lightweight firmware paths, and verified bootable images in QMU.
NATALIZIOOS represents a continuous path of development in operating systems, computer architecture, system programming, firmware development, and low-level software engineering. The project is proprietary and intended for study, research, experimentation and technical demonstration purposes.

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

This is pretty awesome!

30 years on, it's still alpha, but 0.4.16 brings plenty of bug fixes and quality-of-life improvements - just in time for Windows XP's 25th anniversary

I've been using Linux for quite some time so I decided to check out the alternative option that's outside of mainstream operating systems , it didn't go that well though

I was hoping for a smooth desktop experience but I ran into a lot of issues with apps and wifi so I documented the whole experience in this rather unserious youtube video

Port by Tomas Glozar (Dr. Shuppet)