In case this may be of interest to readers here...a short time ago I stumbled across this page detailing a circuit that lets you use two separate keyboards (and likely two separate mice as well...) with a sigle computer through a single PS/2 port.
This is something I've wanted for some time now...off and on..but never found a circuit that would do this.
I've seen a commercial device that did the mouse/keyboard 'splitting'...but it was and is still grossly overpriced.
Yes, I know that you can do more than one keyboard through the USB ports.
So here is the web locale....
http://www.hobbycnc.hu/CNC/Splitter/SplitterE.htmUpdate: Here is (I think) the original circuit by it's designer:
http://www.akagisan.de/electronic/kbd-splitter.html...
Hope this hasn't been posted here already
....
Spec57