Have you looked at the Unibus troubleshooting guide? It used to be on bitsavers.
On Sat, Mar 29, 2025 at 9:05 PM Ethan Dicks via cctalk < [email protected]> wrote: > On Sat, Mar 29, 2025 at 9:46 PM Jon Elson via cctalk > <[email protected]> wrote: > > In the "old" days, such as the 1970's, pretty much any > > DEC-manufactured peripheral was supplied as a bunch of cards > > that plugged into a specific backplane section, generally 9 > > slots, I think. A couple double-wide slots were for the > > Unibus in and out connectors. > > There were plenty of 9-slot system unit peripherals, but there were > also 4-slot system unit peripherals in the early days. > > One I have myself is the KE11-A integer math unit. > > -ethan >
