Open Source Assembly Operating System Kernels for Windows

colorForth is, in Chuck Moore's own words: "A dialect of Forth that uses color to replace punctuation. Includes its own operating system. Produces extremely compact programs. Instant compile from pre-parsed source."

LUnix (little UNIX) is an operating system for the Commodore64 - a famous home computer back in the 80s. It supports TCP/IP networking (SLIP or PPP using a RS232 interface). LUnix aims to look and feel like UNIX.

UEFI GPT fdisk is a port to UEFI of the famous GPT fdisk partitioning tool, see http://sourceforge.net/projects/gptfdisk/ . Now since this program runs directly under UEFI shell you don't need to *boot* the system to convert/edit partition tables.

AO-RTOS is a pure object-oriented small footprint real-time operating system for embedded devices. The project is using Active Object (or Actor) concurrency model and finite state machine (FSM) design template as implementation base.

SkyEye is a very fast full system simulator which takes llvm as IR of dynmic compiled framework.. It can simulate series ARM, Coldfire,Mips, Powerpc, Sparc, x86, TI DSP and Blackfin DSP Processor. Also can simulate multicore system by the multicore of host. The commercial support is provided by DigiProto Co. (http://www.digiproto.com)

This project has been moved to http://pros.cs.purdue.edu/ PROS is a lightweight and fast alternative operating system for the VEX Cortex Microcontroller. It features multitasking, low-level control, and Wiring compatible functions to harness the full power of the Cortex. With a real-time kernel based on FreeRTOS and a development environment built on Eclipse CDT, PROS uses proven software to increase the reliability and usability of the VEX development system across all three major computing platforms. PROS is currently under active development to make it usable for VEX high school and middle school teams. PROS is intended for advanced VEX users seeking to move beyond competing environments. Eclipse and FreeRTOS have their own licensing agreements. Please see http://www.eclipse.org/legal/epl-v10.html and http://www.freertos.org/a00114.html for details.

Prex is a portable real-time operating system for embedded systems. The small, reliable and low power kernel is written in C language based on micro kernel design. File system, UNIX process and networking features are provided by user mode tasks.

The FDOS Operaing System is 100% written in Assembler (NASM). It supports FAT 12, TSR and a small Multi Kernel System. The source is very good documentated (only in English). A German, russian and English Documentation (about 40 pages) are included.

Open Source microkernel for ia32 architecture. Basically this is a full functional operating system implementation using GNU C and nasm. Fully commented in spanish and with external documents explaining system calls, library functions, design, etc.

A scheme (lisp) interpreter written in ARM assembly language (currently: Cortex-M4F,M7, Cortex-A5,A8,A9, Cortex-A53; previously:ARM7TDMI, ARM920T, Cortex-M3) for education, robotics, wearable devices. Tested on Allwinner A64, Amlogic S905, Atmel SAMA5D4, SAME70, SAMV71, NXP LPC4300, RT1050, iMX8M, Samsung S5P6818, ST STM32F4, STM32F7, and TI AM3359, OMAP3530, DM3730, OMAP4430, TM4C1294 chips (previously: NXP LPC-1300,1700,2000, ATMEL AT91SAM7, STM STR711, STR911, STM32, CIRRUS EP9302, LMI LM3S1968, TI OMAP).

DRAKE is a true homebrew game console that consists of specially crafted hardware, system software and games.

This is a library library for the handyboard (www.handyboard.com for a description), which can be used with the gcc m68hc11 compiler. The library has a somewhat different feature set from Interactive C but should be much faster.

K-OS is an open-source realtime-operating-system based on the OSEK/VDX standard aimed at compiler and microcontroller independence. Currently we support Motorola (Freescale) HC12/HCS12/HCS12X targets.

The L4/Alpha port of the L4 microkernel, currently supports the entire range of Alpha 64-bit processors including the 21064, 21164 and 21264. Multiprocessor support exists for 21264. L4/Alpha is distributed under the GPL.

The L4Ka microkernel is an L4 compatible microkernel running on multiple platforms (x86, ARM, MIPS, PPC, 68K). Its official name is now L4Ka::Hazelnut. This kernel has been discontinued in favor of L4Ka::Pistachio. See http://l4ka.org/

libosdk stands for operating system development kit, which is simply a library containing low-level architecture dependent assembly procedures you can use to develop your own os without using assembly language or even know about it.

This is MacroDie OS for ti83 plus family. It's capable of running multiple aplications and programs at the same time... improvements have been made and bugs corrected at the time that now i can release it... trought its still in an beta stage...

Nemesis is a tiny real time operating system kernel based on x86 PCs. Its main purpose is to serve as a simple but realistic example of an real time OS kernel running on real hardware..the purpose of this is that it can be embedded in small devices lik

High performance, assembler coded, both desktop and server operating system. Ease of use, ease of programming, joy of power.

This project is an effort to develop open source software for all old platforms, like MSX, Commodore, AMIGA, Atari, ..... and collect technical information about old platforms, keeping the "old skool" flame alive.

Pistrix (lat. Shark) is a Open Source project of Operation System, written on Assembly and C Languages. The OS model is microkernel, because the basic task of the Pistrix is Speed and Small Size.

Unix-like operating system for the TI-89 and TI-92+ graphing calculators.

Fast, multi-threaded OS for PCs and 386+ based embedded systems. Runs many DOS, DPMI and Win32 console programs. 100% assembly with segment protection.

16 bit Forth for PC. No OS required.