Welcome to NitrOS-9

NitrOS-9 is a real-time, process-based, multitasking, multi-user, Unix-like operating system for the TRS-80 Color Computer, Radio Shack Color Computer 2, Tandy Color Computer 3 and Dragon 64.

The original OS-9 was created in 1979. NitrOS-9 is the modern equivalent of that OS, and includes advanced features like support for up to 2 MB RAM and 4 GB Hard drive partitions.

It is still being developed, and support is available in many mailing lists and forums.

NitrOS-9 News

May 30, 2008

NitrOS-9 Version 3.02.08 is available.
Read the release notes.

May 27, 2008

There is a new NitrOS-9 Wiki. Please stop by and contribute. (A sourceforge user name is required to edit it)

May 17, 2008

NitrOS-9 Version 3.02.07 is released.
This is a "developer's release", to test new features and bug fixes. If you use, please seend any feedback to help with a prompt release of the "official" 3.02.08.

February 8, 2008

A NitrOS-9 command guide is being created in the CoCo Wiki.
Please stop by and contribute.

April 21, 2006

NitrOS-9 Version 3.02.06 is released.

Support for booting from fragmented bootfiles has been added.
os9gen has been updated to allow the creation of fragmented bootfiles.
dir and mdir now have more robust support for various screen widths when displaying data.
dir and attr now use the SS.FDInf getstat call to obtain a file's FD sector.
dsave now has -t and -n options.
A bug in format which affected 128MB partitions has been fixed.
/D2 descriptor now part of standard bootfile.

Go get it now!