On Sat, Jul 17, 2021 at 04:27:23PM -0700, Glen Slick wrote:
> > The question I have is, do you know an easy way to remove and insert globes
> > in the front panel switches please?
>
> At somewhere around $30 for those tools I haven't been curious enough
> about buying one to see if it is suitable
On Sat, Jul 17, 2021 at 2:28 PM johnr@grebnesor via cctalk
wrote:
>
> Hello,
>
> I came across a web article in which you discussed restoring an HP2100A. I
> spent many years working on this computer and have the front panel. I am
> doing some work on it to produce a display for fun. I am replac
Hello,
I came across a web article in which you discussed restoring an HP2100A. I
spent many years working on this computer and have the front panel. I am doing
some work on it to produce a display for fun. I am replacing the incandescent
globes with LEDs and using a Raspberry Pi to control the
Marc; There's probably a HP 2100/21MX singularity being formed in my
basement. I think it's the 7906's that push it over critical mass lol
Hayden - Here is a link to the 21MX M/E/F I/O interfacing guide. It is not
the earlier 2100-specific one that I was thinking about the other day, but
it should
yes we used to at computer exchange inc... we had a bunch of blank I/o
boards with the i/o special chips traces on the corner of board we
would populate that portion then built out the rest. rest of board
was like a prototype board I scored a stack of them at a san jo
On Tue, 2 Aug 2016 21:44:48 -0700
Curious Marc wrote:
> Lyle,
> I didn't know you had such a collection of 2100's and 21MX and E's
> and F's! I need to come and visit! Marc
I have way too much of a lot of stuff ;)
Lyle
> > On Aug 1, 2016, at 7:12 PM, Lyle Bickley
> > wrote:
> >
> > Hi Hayde
Lyle,
I didn't know you had such a collection of 2100's and 21MX and E's and F's! I
need to come and visit!
Marc
> On Aug 1, 2016, at 7:12 PM, Lyle Bickley wrote:
>
> Hi Hayden,
>
> On Mon, 1 Aug 2016 19:29:05 -0600
> Hayden Kroepfl wrote:
>
> --snip--
>
>> With regards to the power suppl
Hayden wrote
-
I've also got two additional boards in a bag that I haven't taken out yet
https://goo.gl/photos/D4quXT992Y6huQoAA . They're in there quite tightly, but I
did take a peek at some of the chips that I could see from the edge.
Couldn't read the part number, but they were Intel
I've also got two additional boards in a bag that I haven't taken out yet
https://goo.gl/photos/D4quXT992Y6huQoAA . They're in there quite tightly,
but I did take a peek at some of the chips that I could see from the edge.
Couldn't read the part number, but they were Intel chips and almost looked
t
Glen wrote...
--
Isn't there a looping memory test capability built in through the front panel?
Maybe you have to flip a switch or something to enable that. I'd have to look
at the manual to remind myself.
--
My foggy memory is telling me the same thing as Glen mentions above. The 21MX
On Aug 2, 2016 3:55 PM, "Hayden Kroepfl" wrote:
>
> Well I'm hoping for the memory section that I can find at least one of the
> 4 core boards that works right away. I've got an 8k driver board I can
swap
> it so I could run the system on only a single core board if needed. I'd
> probably write a
2016 at 3:46 PM, Rik Bos wrote:
>
>
> > -Oorspronkelijk bericht-
> > Van: cctalk [mailto:cctalk-boun...@classiccmp.org] Namens Jay West
> > Verzonden: dinsdag 2 augustus 2016 23:24
> > Aan: 'General Discussion: On-Topic and Off-Topic Posts'
> &
> -Oorspronkelijk bericht-
> Van: cctalk [mailto:cctalk-boun...@classiccmp.org] Namens Jay West
> Verzonden: dinsdag 2 augustus 2016 23:24
> Aan: 'General Discussion: On-Topic and Off-Topic Posts'
> Onderwerp: RE: HP 2100A Restoration
>
>
> There
There is an HP book specifically on I/O interfacing to the 2100 (and 21MX) I/O
bus. I think there's also an abbreviated chapter on it in a different manual.
I'll see if I can dig up the name and if it's online anywhere.
I've restored at least five 2100's, and run a dual cpu 2100A & 2100S system
Alright, thanks for all the helpful tips and information.
I guess what I'll do when disassembling it is note down every electrolytic,
and probably just throw them all into a Digikey order that I'm working on
for other repairs.
Probably will give reforming a try if it seems practical, but I assume
Back in the day we were running and selling 2000 gear in the 80's never
had a bad power supply. one fan died in our 2000 F/ access system and
rather than tear it down to replace the fan just bolted a mother of a
fan to the back of the processor over the space the dead fan was.
On Mon, Aug 1, 2016 at 10:25 PM, Lyle Bickley wrote:
> On Mon, 1 Aug 2016 22:11:17 -0700
> Bob Rosenbloom wrote:
>
> --snip--
>
>> There's a bunch of small electrolytic capacitors on the Inhibit
>> Driver Load Card, A106, that needed to be reformed before my memory
>> would work reliably.
>
>> Th
On Mon, 1 Aug 2016 22:11:17 -0700
Bob Rosenbloom wrote:
--snip--
> There's a bunch of small electrolytic capacitors on the Inhibit
> Driver Load Card, A106, that needed to be reformed before my memory
> would work reliably.
> They reformed themselves in one of my units. I had memory errors for
You need to get all the service and diagrams manuals for this machine.
I think they are on bitsavers and the Australian HP museum site. You
probably should go through both of said sites.
> With regards to the power supply, I'm thinking my best bet would be to do a
> power on with no cards in the
On 8/1/2016 6:29 PM, Hayden Kroepfl wrote:
Hi,
I recently acquired a pair of HP 2100A minicomputers locally for very
cheap. Don't think I could get much more local that a guy literally at the
end of my street. He bought them at an auction over ten years ago, never
powered them on, and left them
With the supplies being switchers do not use a autotransfomer (Variac). If
they were mine I would replace the caps even if it meant speing $100 or so
and waiting. And being switchers they will need a minimum load to operate
correctly.
-pete
On Mon, Aug 1, 2016 at 7:12 PM, Lyle Bickley
wrote:
>
Hi Hayden,
On Mon, 1 Aug 2016 19:29:05 -0600
Hayden Kroepfl wrote:
--snip--
> With regards to the power supply, I'm thinking my best bet would be
> to do a power on with no cards in the system. Though I'm not sure if
> all the power rails would even come up without a load on it, since it
> soun
Hi,
I recently acquired a pair of HP 2100A minicomputers locally for very
cheap. Don't think I could get much more local that a guy literally at the
end of my street. He bought them at an auction over ten years ago, never
powered them on, and left them in his garage since. They've likely never
be
23 matches
Mail list logo
