In my perfect world, I would like to hook up my:

Atari 2600
Atari 800
Nintendo
Super Nintendo

to some type of switchbox so that I can switch between all of them at will. What are the chances of something like this existing? It looks like all the outputs are the same type of plug (similar to an RCA), but not sure if they truly are RCA plugs. Any help would be great.

Paul