On Sun, Mar 30, 2025 at 11:06 AM Jon Elson wrote: > On 3/29/25 21:05, Ethan Dicks wrote: > > On Sat, Mar 29, 2025 at 9:46 PM Jon Elson 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.
I also remembered a couple other 4-slot system unit peripherals I have: RK11-D VT11 Probably the most common 9-slot system unit devices I've encountered are: RK611 (which happens to have a couple of available SPC slots) DH11 RH11 But there are many of both sizes. Cheers, -ethan
