Regrettably, I just bought a ps/2 kvm switch for my macbook. My plan is to connect my macbook and xbox 360 to it, and then share one monitor. So obviously mice and keyboards I do not care about. How can i do this? as of now, the switch doesnt work because it gets power from a ps/2 port that it plugs into. Should i get a usb to ps/2 adapter?