30 Mar
2025
30 Mar
'25
11:17 p.m.
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