So for example; We have one large monitor that has 4x HDMI ports on the back. We can then plug 4x different computers into the monitor. Your keyboard and mouse plug into the KVM switch.

Of course, you could roll your own HDMI switch, and if you’re looking for references, we’ve covered a good few hacks doing that as part of building a KVM.

Today, KVM switchers are a bit more complicated than a simple rotary switch. We’re not dealing with VGA anymore — we have HDMI muxes. We’re also not dealing with PS/2 anymore, and USB ...