For those that are unfamiliar, arcade machines use an interface standard called "JAMMA" to connect game boards to cabinets:http://www.arcadetreasure.com/techinfo/techinfo.htm
Games using more than 2 players with 3 player buttons each often have an additional "kick harness", giving you multiple signal lines.
I would like to use arduino to interface multiple of these game boards, initially 3, to my arcade cabinet - which has a rather non-standard setup of 4 players with 8 buttons each. I can already handle this directly wiring, and I have this notion that I could cascade some relays to get the job done. For each system there might be anywhere from 80-100 signal lines that need to be switched.
I get the impression also that for jobs such as this there are probably ICs that exist to make this easier. I just want to keep it simple for now - maybe some stupidly simple arduino logic that when I pull a line low it iterates to the next game board. Might go back later and put a segmented LED controller and segmented LED on to where it can tell me what board is active at any given time. Right now I am just trying to figure out how to switch that many signal lines en-masse. Aside from a relay-cascade (if that's the right term for it, one relay setting off multiple relays down).