Compucorp 322G

This calculator, or maybe computer is a long term project. It's quite a bit larger than a handheld calculator, but it was pretty advanced for it's time. It's got scientific functions, memories, and it is programmable.

Mine had a very dodgy keyboard, with lots of key bounce. As the calculator errors if it gets keypresses too quickly for it's liking this was highly irritating. I dismantled the keys and cleaned the metal domes. These provide the click for the key and short out the PCB which registers the key presses:

There were some interesting extra keys under the front panel, I'm not sure what they are:

The PSU needs a rewire, as it wasn't working too well:

The plug needs replacing and probably the socket in the calculator too.


The calculator probably also needs some components replacing, as it seems to be able to eat a set of D cells in about three minutes, this is probably old capacitors or such like. Of course it could be rubbish batteries...