Cobado M6809 Micro BIOS/Server Icon

Cobado M6809 Micro BIOS/Server

A Colour Computer (M6809) BIOS for interfacing to remote file systems

Add a Review
0 Downloads (This Week)
Last Update:
  Browse Code SVN Repository



Just for fun, I entered Cobado in the Retrochallenge Content. There are some great projects running:

Cobado is a "CoCo Backdoor BIOS". The idea is to run an ultra small generic BIOS on a Colour Computer which can be used to add full remote file access to a Windows system.

The BIOS is under 255 bytes and fits into the cassette buffer. It hooks into the CoCo's line input (vector 12) and returns the command line to the server via the Becker port. The server is then able to take over the CoCo to provide any command set it chooses.

Currently you can navigate Windows, load/save BASIC & binary programs.

The next version will replace the Becker port with RS232, so the system will run on a stock standard Colour Computer.

Future versions will enable executing system commands. ie: Assemblers, compilers, etc. This will enable fast, safe, software development within the CoCo environment.

Cobado M6809 Micro BIOS/Server Web Site



  • Remote TCP Server
  • Ultra Small 6809 BIOS
  • Tape Loadable BIOS
  • Portable to other 6809 (and maybe 6502) systems


Other Useful Business Software

New Freeware: Spot Malicious Actions in Your Network Icon

Are you sure that there is no active hidden threat in your network? Netwrix has a freeware that helps you spot behavior-based anomalies.

New Freeware: Spot Malicious Actions in Your Network Icon
The new Netwrix Auditor Free Edition automates user activity monitoring and delivers the details straight to your mailbox every single day. It enables you to detect and promptly respond to threatening activities across multiple systems and applications, such as AD, Exchange, file servers, SQL, Windows Server and more. And it will never expire or stop working when you need it.
New Freeware: Spot Malicious Actions in Your Network
Are you an IT pro at a company with 250+ employees?
Write a Review

User Reviews

Be the first to post a review of Cobado M6809 Micro BIOS/Server!

Additional Project Details



Thanks for helping keep SourceForge clean.

Screenshot instructions:
Red Hat Linux   Ubuntu

Click URL instructions:
Right-click on ad, choose "Copy Link", then paste here →
(This may not be possible with some types of ads)

More information about our ad policies

Briefly describe the problem (required):

Upload screenshot of ad (required):
Select a file, or drag & drop file here.

Please provide the ad click URL, if possible:

Get latest updates about Open Source Projects, Conferences and News.

No, thanks