I've sent off for some components from eBay for new projects. They take a while to arrive so while I was waiting I looked for something else in my junk box to work on.

It looks like I salvaged these boards from copiers a couple of decades ago. I don't know if they still work, but there's a good chance that they do and the copier was retired for other reasons. Anyway I have lots of replacement chips if anything on the board needs to be fixed.

Based on the inventory I've started thinking about what to do with it:

What I do not want to do with it:

I don't want make a CP/M computer out of it. If I want to be nostalgic about Wordstar. etc. I can run them in an emulator and it will go faster than any real hardware ever did. Besides the memory spaces aren't conducive to modification to run CP/M.

I don't want to make a clock or something that could be done in much less board space with a modern microcontroller.

There are serial interfaces but I don't want to use them in the final product. I much rather make something that is standalone and has no user interaction other than some switches if necessary.

What I might want to do with it:

The presence of power transistors and comparators on board suggests I could make some kind of controller out of it.

I might have to replace the serial I/O chip with a parallel interface chip. To do this I may have to create a daughter board.

So, until I have figured out its purpose, it might stay a work in progress.