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A monolithic, non-POSIX operating system for x86_64, built from scratch in C and assembly. Intended to be an educational and experimental project that rigorously follows a Plan9-style "everything i…

C 237 7 Updated Nov 5, 2025

r3 programing language - ColorForth inspired

Forth 73 7 Updated Nov 5, 2025

A Small Lisp in Forth

Forth 158 13 Updated Apr 21, 2021

NocturneOS - простая операционная система для компьютеров

C 4 1 Updated Nov 4, 2025

Open Source Flat Binary Bootloader

C 4 Updated Aug 26, 2025

Forth implemented in Rust for realtime application

Rust 2 Updated Mar 4, 2024
Python 5 Updated Aug 19, 2025

GNU toolchain for RISC-V, including GCC

C 4,218 1,311 Updated Nov 4, 2025

SP-Forth x64

Forth 16 Updated Oct 30, 2014

Microkernel-based General Purpose Operating System #Hobby OS#

C 51 8 Updated Oct 25, 2025

Simple i386 hobby operating system

C 21 2 Updated Jan 8, 2025

Mitch Bradley's CForth implementation

C 169 41 Updated Oct 23, 2024

OpenFirmware as used on OLPC (and elsewhere)

Forth 116 10 Updated Jan 15, 2016

Bootstrapping a Forth interpreter from hand-written tiny ELF binary. Just for fun.

Forth 328 14 Updated Aug 18, 2022
C++ 3 1 Updated Apr 28, 2019

A WIP custom built OS

C 32 6 Updated Oct 23, 2025

Various code snippets

C++ 280 105 Updated Nov 3, 2025

A simple UEFI OS loader to load a kernel.

C 5 2 Updated Oct 6, 2024

A simple public-domain Forth implementation in C++

C++ 58 12 Updated Aug 23, 2019

SP-Forth

Forth 62 7 Updated Feb 9, 2025

SayoriOS - открытое публичное ядро ОС

C 2 Updated Jul 10, 2025

Smallest (268 bytes) 64-bit Portable Executable (PE) file that displays a message box on Windows 10

Assembly 126 8 Updated Nov 21, 2024
C 12 6 Updated Jan 18, 2025

A FORTH in 340 bytes — the smallest real programming language ever as of yet.

Forth 613 28 Updated Aug 18, 2024

Experiment, explore, and get excited about UEFI ...

Assembly 7 2 Updated Apr 6, 2022

A not-so-small Forth

C 7 Updated Jan 5, 2019

A not-so-small Forth for Cortex-M

Forth 295 35 Updated Nov 2, 2025

64 bit fasm tutorials.

C++ 13 5 Updated Oct 13, 2015

Bare-metal Forth implementation for RISC-V

Assembly 58 5 Updated Feb 9, 2024

SayoriOS - открытое публичное ядро ОС

C 34 9 Updated Jul 10, 2025
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