Youve obviously never heard of Belkin switchers then ... in goes a monitor, keyboard and mouse connection from each box, out comes a connection to a singular mouse, keyboard, monitor.
Works with macs, PCs, probably Amigas too - anything using the same screenmode helps. (ie 1024*768 @ 60 Hz f'rinstance.) you then use Ethernet if you want 'em to communicate with each other. AMP is a little bit overkill for just sharing a human interface between two different architectures, innit ? very groovy though...