ISO: DD11-DF backplane

[Josh Dersch]

On Wed, Jun 6, 2018 at 3:06 PM, Bill Degnan <billdegnan at gmail.com> wrote:

>
>
> On Wed, Jun 6, 2018 at 5:20 PM, Josh Dersch via cctalk <
> cctalk at classiccmp.org> wrote:
>
>> Hi all --
>>
>> I finally tracked down the EIS option for my 11/40 and I have it up and
>> running nicely (Ultrix-11 ATM, but I'll be playing with other stuff).
>> Right now I only have a 4-slot DD11 backplane for SPC/MUD boards and I'd
>> like a bit more space for expansion.
>>
>> I have a few DD11-DK backplanes but without modifying the cabling it won't
>> work in a BA11-F chassis.  If anyone has a DD11-DF they'd be up for
>> trading
>> for the -DK variant (or for something else) please drop me a line.
>>
>> Thanks!
>> Josh
>>
>
> Josh,
> Did you pull the Ultrix-11 from an image or make it yourself.  I'd love to
> get a copy of this if you're able to image and post to the web, and I am
> sure simH folks could use this too.
>

I built it from the tape images on TUHS on SIMH and wrote it out to a real
disk (cheated, since I'm fortunate enough to have a UNIBUS SCSI controller
to play with).  I'm happy to share it out, though it's not too hard to do
manually -- there's a writeup at
https://minnie.tuhs.org/Archive/Distributions/DEC/Ultrix-11/Fred-Ultrix3/setup-3.1.txt
that covers the basics.


> Glad to to hear you were able to get this running with the EIS, I was
> unsure if it was possible.  How much RAM do you have?
>

I have 128KW of MOS memory in the system (wish I had core, but I'll take
what I can get).  Ultrix runs fine, but it's tight and the lack of separate
I+D spaces means some programs won't fit (vi, for example).  I did manage
to build a kernel with TCP/IP and Ethernet included, but I need the larger
backplane in order to install the Ethernet controller to test it :).


>
> I will check to see if I have the backplane.
>

Thanks!

- Josh


>
> Bill Degnan
>
>