C# Open Source Managed Operating System

We are currently migrating from codeplex

Cosmos is an operating system "construction kit", built from the ground up around the IL2CPU compiler in C# and our home-brewed language called X#.

It's current stage is only usable for academic work. Some day Cosmos will be ready for production work, but to reach that stage we need more developers. Specifically, we need a few more low level developers to help the few core developers who are currently overwhelmed with work.

Download

Cosmos is available in two forms:

• User Kit - User Kit allows you to develop your own custom operating system in Visual Studio. If you are new to Cosmos, start here. Latest Release
• Dev Kit - Dev Kit is the full Cosmos source with build tools. If you need to modify core Cosmos functions or modify built in drivers, boot, compiler, etc then you will need to use Dev Kit. How to build the Dev Kit - Building from source is easy with our automated builder.

Getting Started

• Cosmos Documentation
• Video: Using VS Express Editions
• FAQ
• Low Hanging Fruit - Looking for something easy to do and prove your worth in Cosmos? Here are a few easy tasks we have on our to do list that are also of importance to us.

Joining Cosmos

• Gitter.im - Live chat. Click the green Join Chat badge at the top of this file. As with the IRC and CodePlex chatroom, please be patient if we don't respond immediately (no pinging).
• Yahoo Group - Email Discussion List. To prevent spambots from spamming our list we ask you introduce yourself to join. Please mention something specific to Cosmos. "Hey I want to join" won't get you in....
• Facebook - Like us to see frequent updates of what is going on with Cosmos.
• YouTube Channel - Follow use to see useful videos.
• Resources - More Cosmos related links.

Articles and Resources

• Develop Your Own Operating System in C# or VB.NET
• Quick View Under the Hood
• Intro to Plugs
• X86 Assembly Debugger Preview
• Making a Remote PC Slave for Debugging or Fun (old article, code deprecated)
• Cosmos Tutorials
• Cosmos Projects

Publicity

• Mary Jo Foley - Cosmos: An open-source .Net-based microkernel OS is born
• Scott Hanselman - Tiny Managed Operating System Edition

Videos

We encourage you to add your own Cosmos videos to YouTube. Please add the tags Cosmos and C# when uploading.

Official Videos - Videos made by the Cosmos Team.

• Building your first Operating System in less than 60 seconds
• Cosmos Debugging
• Cosmos PXE network boot with VMware
• Debugging on real hardware
• User Cosmos videos on YouTube (Cosmos, C#)

User Videos - Selected videos made by Cosmos Users. Please note that we have not verified each of these videos.

• Cosmos Tutorial C# Lesson 1 - Part 1 - int0x10.com
• Cosmos Tutorial C# Lesson 1 - Part 2 - int0x10.com
• Cosmos Tutorial C# Lesson 2 - int0x10.com