Important or useful sites relating to the CoCo, OS-9, Arduino and other topics discussed here.

NEWS: The Glenside Color Computer Club still does yearly CoCoFEST conventions near Chicago. See for more details.

Tandy/Radio Shack TRS-80 Color Computer

  • Glenside Color Computer Club – based near Chicago, Illinois, this is the only known CoCo club remaining. (Also see their original page,, as I am not sure which one they are updating these days.)
  • Cloud-9 – still designing new things for the CoCo after all these years, including PC keyboard adapters, modern memory upgrades, hard drive interfaces and more.
  • CoCopedia – a wiki dedicated to all things CoCo, running the same software that powers the Wikipedia project.

OS-9 Operating System

  • Microware – As of early 2013, OS-9 is now under new ownership.
  • NitrOS-9 – a free operating system for the CoCo, based on OS-9/6809. It has also been ported to run on certain Atari computers that are retrofitted with a 6809 processor.


  • – the official site for Arduino
  • – I have not explored this one yet, but someone from the site suggested it.

4 thoughts on “Links

  1. Pingback: Greetings from the Sub-Etha! « Sub-Etha Software

  2. Marge Espina

    Good day Sub-Etha Software,

    I had a question regarding the “Links” page on your website. Are you accepting suggestions for the page?

    If you are, I would like to suggest adding DIY Hacking under the “Arduino” header. They are an active, open source platform for DIY maker projects much like Hack A Day. These projects are centered around Arduino, Raspberry Pi, Intel Edison, home automation and more. And better yet, the content is completely user generated. Here is the URL for their website if you would like to have a look:

    Let me know what you think of this suggestion or if you need any additional information!



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