I recently picked up an Acorn A4000, as I already had a keyboard for it, but as it turns out, the keyboard doesn't go. The last owner said it didn't work on his PC, and only 3 keys work when used on the Acorn. I assume the different pinouts killed it when it was used on that PC?
Might anyone around here have a spare external Acorn Archimedes keyboard that they're willing to part with?