@mrundkvist

Any USB optical mouse since about the turn of the century has at least a 12 MHz processor because it needs that to talk the USB protocol, which makes it faster than any computer in the world in 1977, and it has a second processor that tracks the image the mouse is looking at and figures out which way it's moving, and it's doubtful any computer in the world in 1977 could have done that in real-time.