I have two backplanes and a diablo drive if anyone is interested. Paul
On Mon, Feb 8, 2021 at 11:38 PM Ethan Dicks via cctalk < cctalk@classiccmp.org> wrote: > On Mon, Feb 8, 2021 at 10:22 PM Fritz Mueller via cctalk > <cctalk@classiccmp.org> wrote: > > Yup, RK11-C, and it seems complete (modulo drive cables and > terminators.) I have > > one debugged and running in my '11/45, so I know it well. > > I've had one for years but I haven't tried working on it yet. > > > > On Feb 8, 2021, at 3:16 PM, Ethan Dicks via cctalk < > cctalk@classiccmp.org> wrote: > > > The ribbon cables are a bit out of place... perhaps they were just > > > stuffed into empty slots to keep them from being damaged. > > > > The cables are actually in the correct slots -- they connect A30 and B30 > to the > > pass-through connectors to support plugging in a pair of KM11s from the > > outside of the rack for debug. > > Ah... handy. I don't recall if mine has those or not. I do have a > replica KM-11 set that I need to construct. It will definitely come > in handy. > > > On nice thing about this controller is that it supports "Read/Write All" > mode, which > > lets you read or write the raw bitstream including block headers. This > can be useful > > for disk recovery if you have a corrupted block header, or for > reading/writing "foreign" > > disks (within limits). This is controlled by bit 9 in the CSR, which is > unimplemented on > > the later controllers. > > Interesting. Did not know that. I don't know that I've ever had a > corrupt disk that I needed to read, but it's good to know that feature > exists. > > -ethan >