> From: Bill Degnan > My thought is that with my PDP 11/05 with S chassis / BA11-K. Urr, if you're talking about the backplane the CPU is in (which can hold one MM11-U), I think you're out of luck: there's no slot for the M7259 parity controller to plug into (at least, one the one in the -11/05S-10S manual). Noel