Re: Xerox 820

[william degnan via cctech]

On Nov 22, 2017 8:17 PM, "Pete Lancashire via cctech" 
wrote:
>
> Wow that brings back some memories. There was about 10 of us who got
> together and I can't remember how or who got 10 of them. I think mine is
> still in storage somewhere.
>
>
>
> On Wed, Nov 22, 2017 at 4:54 PM, allison via cctech 
> wrote:
>
> > On 11/21/2017 10:51 AM, Bill Gunshannon via cctech wrote:
> > > Any interest in a Xerox 820 board that never had it's construction
> > completed?
> > >
> > > It's amazing the stuff I find digging through my boxes of junk.
> > >
> > > bill
> > Bill,
> >
> > I'm likely one of the few around that can populate it with period parts.
> > Very tempting to add yet another project to my list.
> >
> > Allison
> >
> >

I have an 820-II but I also have a lot of 820  1/4 un software diskettes
(but no 5 1/4" drive.  I can image and upload my disks if you'd like.  I
have about 50 or so disks, various software.

My 820-11 was new-old -stock when I got it whatever years ago, still have
the orig boxes and all.  Takes 8in disks, has a working hard drive.  I
think I have dBase and that kind of thing.

Bill Degnan
twitter: billdeg
vintagecomputer.net

Re: Xerox 820

[Pete Lancashire via cctech]

Wow that brings back some memories. There was about 10 of us who got
together and I can't remember how or who got 10 of them. I think mine is
still in storage somewhere.



On Wed, Nov 22, 2017 at 4:54 PM, allison via cctech 
wrote:

> On 11/21/2017 10:51 AM, Bill Gunshannon via cctech wrote:
> > Any interest in a Xerox 820 board that never had it's construction
> completed?
> >
> > It's amazing the stuff I find digging through my boxes of junk.
> >
> > bill
> Bill,
>
> I'm likely one of the few around that can populate it with period parts.
> Very tempting to add yet another project to my list.
>
> Allison
>
>

Re: Xerox 820

[allison via cctech]

On 11/21/2017 10:51 AM, Bill Gunshannon via cctech wrote:
> Any interest in a Xerox 820 board that never had it's construction completed?
>
> It's amazing the stuff I find digging through my boxes of junk.
>
> bill
Bill,

I'm likely one of the few around that can populate it with period parts.
Very tempting to add yet another project to my list.

Allison

Re: Almost PDP 11/05 on Ebay

[jos via cctech]

On 21.11.2017 19:25, william degnan via cctech wrote:

"DEC PDP-11 Digital BA11-KE Mounting Box"

https://www.ebay.com/itm/DEC-PDP-11-Digital-BA11-KE-Mounting-Box/28265372079

granted "all you need are the cards and the front panel" reminds me of the


Guess who has all the boards, but no backplane & power supply...

Jos, that is

Re: DS12887 pcb substitute with battery

[alan--- via cctech]

What are you talking about?

https://www.digikey.com/product-detail/en/maxim-integrated/DS12885/DS12885-ND/1196867

-Alan

On 2017-11-21 14:16, Maciej W. Rozycki via cctech wrote:

On Mon, 13 Nov 2017, systems_glitch wrote:

Good stuff! I recently designed a module to build new DS1287 and 
DS12887

modules from the bare DS1285 and DS12885 ICs:

https://imgur.com/a/cgKm5


 Nice!

 That wouldn't solve my problem though, given the apparent 
unavailability
of DS1285 chips (in any packaging, whether surplus or used), compared 
with
the ubiquity of used DS1287 and DS1287A ones, possibly because they 
were
often socketed.  Using my systems as a reference for the Linux port I 
want
to avoid any deviation from their original specification so that 
software

does not make use of it by chance.

 As to the DS12887 and DS12887A chips -- these are still manufactured 
and
readily available, as someone mentioned a while ago, although a bit 
highly
priced, so either reworking an old one or using your alternative does 
help

cutting cost, which may especially matter if you need more than just a
few.

  Maciej