If I remember right its a double or triple stack pcb with ribbon cables. Its so old now,it was out around 86. The last time I saw a junked cab for it was back in 99-2000 at the back of Godwins or Galaxy Amusements,I don't even remember which vendor anymore. The cab was stripped of its monitors,ect. It was siting by a decommissioned Cisco Heat if I remember right.