DEC PDP-11/45 backplane +5 ECO

[Eric Smith]

On Sat, Apr 24, 2021 at 9:28 PM Noel Chiappa via cctalk <
cctalk at classiccmp.org> wrote:

> I had a look at my /45 (a later KB11-D - although I think the backplanes
> for
> the -A and -D are identical),
>

I did not think they used the same backplane, but 11/45 maintenance manual
(EK-11045-MM-007) confirms that they are. Tables 1-2 for the KB11-A and
table 1-3 for the KB11-D confirm that the backplane for both is the
70-08871.

It's possible that the KB11-D requires a higher rev of the backplane than
the minimum for a KB11-A.  That's the case for the 11/70. The KB11-B
(original 11/70) and KB11-C (later 11/70) have essentially the same changes
as from the KB11-A to KB11-D, and the 11/70 maintenance manual
(EK-11070-MM  says that both use the 70-11051 backplane, but that for a
KB11-C, the backplane must be revision D or later.

It sure would be nice to get backplane wirelists for all four (KB11-A, -B,
-C, and -D).

Also, I'm looking for a Field Maintenance Print Set for the RH70.