early PDP-11/45 info sought

[Jay Jaeger]

On 1/27/2019 6:40 PM, Fritz Mueller via cctalk wrote:

> Those reading through the recent "PDP-11/45 RSTS/E boot problem" thread here will know that I've gotten to some corners of my 11/45 CPU now that don't match up with the commonly available engineering drawings.
> 
> My /45 is an early serial number (#152).  So far I've verified hardware differences on at least my M8100 and M8105 cards and spares, relating to parity error abort handling.  I would really like to track down any of the following resources:
> 
> - PDP 11/45 system engineering drawings *earlier* than those currently available on bitsavers (Jun '74)
> 
> - Any PDP 11/45 backplane wire list (what looks to be a wire list in the currently available engineering drawings is actually only a breakdown of the power harness.)
> 
> - PDP 11/45 ECO information, particularly the following:
> 
>     M8100  00003
>     M8103  00005
>     M8105  00005
>     M8106  00007, 00008, 00012, 00012A
>     M8110  00008
> 
>     KB11-A 00015
> 
> Bitsavers seems to have a DEC-O-LOG for M8105, but this does not contain specifics on cuts and jumps for ECO 00005, referring only to the associated "kit".  DEC-O-LOGs for the other processor boards are missing.
> 
> If anybody thinks they might have any of this info squirreled away anywhere, I'd really love to find out more about it!
> 
> Parts of the ECO's are pretty easy to figure, just by comparing the state of my existing boards to the '74 drawings.  But other parts not so much...
> 
>     thanks much,
>       --FritzM.
> 
> 

I am working on transcribing some DEC-O-Logs - more than are on
bitsavers that relate to the KB11-A and its cards.

In the process, I came across KB11A-B0008 - which indicates that NPG,
PA, PB, LTC, ACLO, DCO and +15V are ALL missing in slots 26-28.  That
FCO was dated SEP-72, and specifically mentions the DL11. I think you
had mentioned that issue in another post.

Also, I have at least two sets of DEC-O-Logs.  (JAN 86 and JUL 86) that
cover the 11/45.  I would be happy to loan a set out to someone who
promised to scan or print/scan a set.

I hope to be done transcribing later today.

NOTE:  The M8110 looks like a mess - lots of ECOs that culminate in
replacing with an M8120.  You might not want to use it, and just use
other MS11s.