----- Original Message ----- From: "David C. Crosthwait" > Not sure about PDP8. PDP 11 (I think) drove the CMX 340. I may be way off. You are correct about the PDP-11. The CMX 300 used a PDP-11/05. That's the system that is documented in the manual from NBC Burbank. Don Norwood www.digitrakcom.com