You've got IR badges?
Yes.
I take it that they shoot out an IR signal at regular intervals?
Yes. The IR badge system works perfectly already. What I'm looking for is some way to
eliminate several mechanical relays. If we can interface to the PC bus via a PCI or ISA
card slot, and disconnect/disable input hardware, we can drop most of the relays.

Physically switching input devices & video works fine, but if there's an easier way, which
requires < hardware, I'm all ears...;o}