The Capcom IO board isn't actually USB.  It's JVS.  About the only thing the two standards have in common is the connector (JVS deliberately used the USB connectors/cables because they were "readily available").
There are some people who make JVS PC interfaces.  They'll give you real USB or maybe PS/2 which you could then use via a KVM, if you want to.  Unfortunately, every JVS IO board (especially from different vendors) has a different register map, so you need to make sure you find one that supports the board you have.  The Capcom one is one of the most commonly supported, at least.