I connected a madcatz pcb to a ps1 pcb. When I connect the ground wires, the pcb of the psx shows me that most of the buttons are staying activated. And the rest are going off and on. The madcatz pcb is just fine.
EDIT: Sorry please remove this thread. I didnt meant for it to post. I typed up the post but decided not to post it. I guess it went through because Im an idiot. I did figure it out though.