Hey all, as some of you know, I've been slowly working on a design to do 4 joysticks on the Atari 2600, using a simple multiplexer scheme -- using one or two of the controller lines as output to drive a multiplexer, allowing multiple joysticks in a joystick port. It's mostly worked really well, BUT on consoles that are still using RF (ie haven't been modded for A/V out), there's a bit of flicker on the screen whenever you wiggle one of the joysticks. Apparently, there's something that happens