I've been banging my head against Google for a couple of days now on this one ....
I'm looking to build a 2-joystick, 7-button (think the old HotRod controller layout, but modified with curved buttons) and I want to add a trackball and a spinner for MAME on Mac. Can I use the same buttons i already have connected to the PCB for the joysticks (I'm going USB) to fire/jump/whatever while using the spinner or trackball to control? I know it's going to end with 3 USB cords coming out of the back, but I'd prefer to drill as few holes as possible!
Thank you so much!