Why the attachment to PS/2? All the stuff that it can do can be done with other interfaces just fine. If you have problems with a specific feature from a company like Asus not working, that's not the falt of the interface, it's that the manufacturer does not have the robust software support you as a customer need. I'm curious as to your experience with USB in embedded systems. My experience is that a solid software stack is needed. But if you are dealing with severely limited firmware storage space and memory, then I can see the appeal of legacy ports. Did MSI have it running? The photos seem to indicate that they didn't have it running. I was curious as to what they would run for bios, regular or EFI.