A long time ago in a shed far far away, my brother Scott and I were given
an old Friden Flexowriter by our father. We proceeded to connect it
to our homebrew 6800 computer system as a printer. It worked.

Below are scans of the original 1978 documentation we created
while figuring out how to make it work. I also typed the software into
a text file and added comments so that you can see how it worked.

Annotated flexowriter 6800 driver program

Driver program listing (printed by Flexowriter) page 1

Driver program listing (printed by Flexowriter) page 2

Driver program handwritten page 1

Driver program handwritten page 2

ASCII to Flexowriter character lookup table

Cable pinout drawing

Character code page 1

Character code page 2

Interface plan

Interface schematic

Flexowriter schematic

Timing diagram

Driver board layout (not used?)

Last updated July 3, 2003 by David Forbes

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All works here unless otherwise specified are copyright 2026 by Tom Jennings. Permission is granted for personal use with no remuneration. Corporations or any organization or their agents, employees, consultants or other relationships human or otherwise, expressly prohibited without written permission.