On Mon, Feb 8, 2021 at 10:22 PM Fritz Mueller via cctalk <[email protected]> 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 <[email protected]> > > 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
