Oh, that's awesome! One of the things I had in the back of my mind was to use stuff from old PCs and build my own robot, but I have no clue how to do that. Don't even know if it's possible.
Last serial port I saw was on a P3 I think, but sadly that board died recently. CPU was fine (1ghz) and went to a friend of mine whose CPU just died, so some part of that system still lives on. I got that P3 board from a friend of mine, was my first "real" PC (was always far behind current tech due to lack of money), was still using a P1 100MHZ before that. I remember playing a lot of Ceasar II... good memories.
