On Jan 13, 2018, at 10:30 AM, Noel Chiappa via cctalk <cctalk at classiccmp.org> wrote: > that exposed backplane above it _might_ be an RK11-C... Definitely an RK11-C — having recently restored one in my 11/45, I can see the flying components on the backplane here are in just the right places. And it would make sense with the diablo and the RK05 in there.