I'm looking to create something to multiplex N 64 bit signals together. The goal of the project is to provide digital switching between a library of old cartridge based video games.
Essentially I want to have a number of cartridges always 'hooked up', but only one set of lines connected to the console. I could do it with 64 single output multiplexers but its seems like I'm going about it the wrong way. Any suggestions on ways to simplify the design?
P.S. - I've been thinking about this a little more, and I have an idea for an alternative approach but I'm not quite sure how to execute it. I don't really need to quickly switch between the 64 bit inputs with any sort of speed, which is what a multiplexer would support. All I really need to do is to tie a given cartridge to the console, while electrically isolating all of the other cartridges. For that, I would essentially need 64 relays for each cartridge. I'd like to avoid that, so I wonder if there are any sort of on/off pass-through chips or circuits I could construct. All I would need is something with 64 ins/outs, +1 to open or close the 64 switches. Ever heard of anything like that?