Other 6809 Computers

There were other 6809-based single board computers that appeared around the time I was finishing the design of the ST-2900. Some were quite large and included video circuitry and other features. But the Peripheral Technology PT-69, which was only 50% larger than my CPU board, was probably the main competition for the ST-2900.

6809 Single Board Computers that could run FLEX and/or OS-9:

If you have information on any other 6809-based computer that included at least 48KB RAM, one or more serial and parallel ports, and a floppy disk controller, on only 1 or 2 boards (that did not require a backplane/motherboard), and that was available before September 1984, please let me know, so I can add it to this page.

Other interesting 6809 CPU boards and computers in the past:

Newer 6809/6309 boards:


"FLEX" was a trademark of Technical System Consultants (TSC).
"OS-9" is a registered trademark of Microware LP.

Use the Reload/Refresh button in your web browser (or Ctrl+F5 or Shift+Reload) to ensure you get the latest version of this page.
Last revised 2022-May-19 12:34 PDT.
Copyright 2019-2022 David C. Wiens.

Home   ST-2900 System   Contact   Site map