On Mon, Dec 31, 2018 at 6:32 PM Henk Gooijen via cctalk <cctalk@classiccmp.org> wrote: > One thought crossed my mind, probably not an issue, but you never know. > > You mentioned that you have an RK11-C, *not* RK11-D. > > There are one or two bits in a register of the RK11 that have a different > meaning/function, depending on the controller being a -C or -D. The RK11-C > was quickly replaced by the RK11-D,
That is good to know. I have only used the RK11-D, but I have an RK11-C in need of cleaning and testing that I've never used. My goal is to eventually reunite it with the PDP-11/20 it came with (sadly, the RK05-F that was part of the set was tossed 35 years ago, but I do have more than one RK05-J, and an abundance of 12-sector packs). -ethan
