also inside my box is 16f628a on some prototype board, which was supposed to convert sun type 5 keyboard into ps/2. i recall it never worked, but i lacked the means and knowledge to debug it back then.
i now have a converter based on arduino pro micro, so it makes me wonder if it's worth trying to debug my old converter or not. it might be nice to resurrect what is likely one of my oldest incomplete projects. but i don't see much point to it. i'm not sure if i even have any device that accepts ps/2 here to test with now.