15 Jan
2003
15 Jan
'03
9:25 a.m.
Ok folks, I'm officially desperate. I can't figure out what is wrong with
the 2100 IOP cpu memory section on my 2000/Access system. So, just thought
I'd post this to the list....forgive my begging, it isn't pretty *Grin*
Anyone have a working HP 2100 cpu available? I will pay real $$$ at this
point, or trade probably just about anything I have for one. If anyone has
one they will sell, or trade for, or give away to a place (me) that will
actually use it and not throw it on a shelf, I would like to know. I'd also
welcome any leads as to where one might be stored, etc. Or, as an
alternative, if anyone has a magical device that will instantly transfer all
of Tony Duell's repair knowledge and ability to my brain, that might work ;)
FYI - I need either a 2100A or 2100S cpu. Don't need or want any 21MX or
1000 type cpus.
Thanks!
---
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15 Jan
15 Jan
1:24 p.m.
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6:44 p.m.
Jay,
I have two but they are non-operating at the moment (2100A/2100S).
Do you have access to the documentation/prints for it? (I do, just
wondering if you need them...) I have a persistent parity problem
with one that I think is simply the +30V threshold needing attention.
The other I'm not sure exactly what's wrong...
I would be happy to trade for some of the other arcana that I need
to get a working system, If that would help. What area of the country
are you located in?
Regards,
Bill McDermith
-----Original Message-----
From: cctalk-admin(a)classiccmp.org
[mailto:cctalk-admin@classiccmp.org]On
Behalf Of Jay West
Sent: Wednesday, January 15, 2003 1:24 PM
To: cctalk(a)classiccmp.org
Subject: HP 2100 cpu plea
Ok folks, I'm officially desperate. I can't figure out what
is wrong with
the 2100 IOP cpu memory section on my 2000/Access system. So,
just thought
I'd post this to the list....forgive my begging, it isn't
pretty *Grin*
Anyone have a working HP 2100 cpu available? I will pay real
$$$ at this
point, or trade probably just about anything I have for one.
If anyone has
one they will sell, or trade for, or give away to a place
(me) that will
actually use it and not throw it on a shelf, I would like to
know. I'd also
welcome any leads as to where one might be stored, etc. Or, as an
alternative, if anyone has a magical device that will
instantly transfer all
of Tony Duell's repair knowledge and ability to my brain,
that might work ;)
FYI - I need either a 2100A or 2100S cpu. Don't need or want
any 21MX or
1000 type cpus.
Thanks!
---
[This E-mail scanned for viruses by Declude Virus]
8:02 p.m.
On Wed, 2003-01-15 at 21:33, Bill McDermith wrote:
Jay,
I have two but they are non-operating at the moment (2100A/2100S).
Do you have access to the documentation/prints for it? (I do, just
wondering if you need them...) I have a persistent parity problem
with one that I think is simply the +30V threshold needing attention.
The other I'm not sure exactly what's wrong...
I would be happy to trade for some of the other arcana that I need
to get a working system, If that would help. What area of the country
are you located in?
The first computer that I learned to program on was an HP 2114A. Anyone
know where I could locate one (or a 2115 or 2116)?
Thanks.
--
TTFN - Guy
16 Jan
16 Jan
2:50 a.m.
The first computer that I learned to program on was an
HP 2114A. Anyone
know where I could locate one (or a 2115 or 2116)?
Yes, actually, I know where there is an absolutely pristine mint HP2116
system, totally decked out with every card and option one could ever want.
An equally mint ASR33 is attached to it. It's about a 10 minute drive from
my house.
However, I have tried for years, and the guy won't let go of it. He's not a
collector, he just likes to turn it on once in a while to let his grandkids
(roughly 7-10 year olds) see all the blinking lights and bang on the '33
keyboard. *sigh*
Jay West
---
[This E-mail scanned for viruses by Declude Virus]
5:53 a.m.
Jay West wrote:
What and deprive a child from use of a REAL Computer.
Ben.
The first
computer that I learned to program on was an HP 2114A. Anyone
know where I could locate one (or a 2115 or 2116)?
Yes, actually, I know where there is an absolutely pristine mint HP2116
system, totally decked out with every card and option one could ever want.
An equally mint ASR33 is attached to it. It's about a 10 minute drive from
my house.
However, I have tried for years, and the guy won't let go of it. He's not a
collector, he just likes to turn it on once in a while to let his grandkids
(roughly 7-10 year olds) see all the blinking lights and bang on the '33
keyboard. *sigh* 
7:26 a.m.
On Thu, 16 Jan 2003, Jay West wrote:
Yes, actually, I know where there is an absolutely
pristine mint HP2116
system, totally decked out with every card and option one could ever
want. An equally mint ASR33 is attached to it. It's about a 10 minute
drive from my house.
However, I have tried for years, and the guy won't let go of it. He's
not a collector, he just likes to turn it on once in a while to let his
grandkids (roughly 7-10 year olds) see all the blinking lights and bang
on the '33 keyboard. *sigh*
You just haven't offered him enough $$$ I guess. Also, throw into the
deal that he and his grandkids can come over anytime to bang on the keys.
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
* Old computing resources for business and academia at www.VintageTech.com *
19 Jan
19 Jan
3:48 a.m.
Hmmm, just what do we think a working 2116 would fetch on eBay?
Jay West wrote:
Sellam wrote...
You just haven't offered him enough $$$ I
guess.
Nah, he's probably gotten wind of ebay prices I bet *ROTF*
Jay West
---
[This E-mail scanned for viruses by Declude Virus]
3:56 a.m.
Well, it WAS done about a year ago or so. Crisis took one of their 2116
systems and refurbed it. It was absolutely cherry. And then they put it on
ebay to see how it would do. I can't remember the final sale price, but I
THINK it was around $1500 maybe.
Jay West
----- Original Message -----
From: "Bob Shannon" <bshannon(a)tiac.net>
To: <cctalk(a)classiccmp.org>
Sent: Sunday, January 19, 2003 8:54 AM
Subject: Re: HP 2100 cpu plea
Hmmm, just what do we think a working 2116 would fetch
on eBay?
Jay West wrote:
---
[This E-mail scanned for viruses by Declude Virus]
Sellam wrote...
You just haven't offered him enough $$$ I
guess.
Nah, he's probably gotten wind of ebay prices I bet *ROTF*
Jay West
---
[This E-mail scanned for viruses by Declude Virus]
4:02 a.m.
On Sun, 19 Jan 2003, Bob Shannon wrote:
Hmmm, just what do we think a working 2116 would fetch
on eBay?
A pretty considerable sum I would imagine ($1000 < 2116 < $2000, more or
less, depending on documentation, peripherals, etc.). There are enough
HP old iron enthusiasts out there to bid it up.
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
* Old computing resources for business and academia at www.VintageTech.com *
16 Jan
16 Jan
10:17 a.m.
Jay West wrote:
Yes, actually, I know where there is an absolutely
pristine mint HP2116
system, totally decked out with every card and option one could ever want.
An equally mint ASR33 is attached to it. It's about a 10 minute drive from
my house.
There's a rather complete 2100 system about 5 minutes' drive from my
house, at the HP Labs where I work (Bristol). Hidden away in storage,
at the moment. Oh, and then there's the 2100S in my garage.
--
John Honniball
coredump(a)gifford.co.uk
1 p.m.
Jay West wrote:
Oh dear, good thing I didn't mention the 2100 at a friend's house
about 3 miles away...
Oops, now I've mentioned it! :-)
--
John Honniball
coredump(a)gifford.co.uk
There's a
rather complete 2100 system about 5 minutes' drive from my
house, at the HP Labs where I work (Bristol). Hidden away in storage,
at the moment. Oh, and then there's the 2100S in my garage.
*SIGH*
19 Jan
19 Jan
3:59 a.m.
So, are you running HP-IP/OS on it, or offering it to Jay for the
restoration of HP2000 Access?
John Honniball wrote:
Jay West wrote:
Yes, actually, I know where there is an
absolutely pristine mint HP2116
system, totally decked out with every card and option one could ever
want.
An equally mint ASR33 is attached to it. It's about a 10 minute drive
from
my house.
There's a rather complete 2100 system about 5 minutes' drive from my
house, at the HP Labs where I work (Bristol). Hidden away in storage,
at the moment. Oh, and then there's the 2100S in my garage.
--
John Honniball
coredump(a)gifford.co.uk
3:19 a.m.
I currently have a 2114A, 2114B, 2115A, 2116B, and a 2116C.
Saddly, on Christmas day, my 2114A lost a filter cap, and needs repair.
This is the same 2114A that took
second place at VCF East 1.0.
In the non-core memory HP department, I also have several (but not
enough!) 2113's.
Guy Sotomayor wrote:
On Wed, 2003-01-15 at 21:33, Bill McDermith wrote:
Jay,
I have two but they are non-operating at the moment (2100A/2100S).
Do you have access to the documentation/prints for it? (I do, just
wondering if you need them...) I have a persistent parity problem
with one that I think is simply the +30V threshold needing attention.
The other I'm not sure exactly what's wrong...
I would be happy to trade for some of the other arcana that I need
to get a working system, If that would help. What area of the country
are you located in?
The first computer that I learned to program on was an HP 2114A. Anyone
know where I could locate one (or a 2115 or 2116)?
Thanks.
16 Jan
16 Jan
4:34 p.m.
Jay,
Have you tried Monterey Bay Communications?
(http://www.montbay.com/) A couple years ago I had a
brief interaction with them and they did not seem very
interested in helping the Computer History Museum or
engaging with people collecting and preserving older
HP gear. But it never hurts to give them a call and
see what they say. I'd try starting at the top if
possible (sorry don;t have a name for you) and go from
there. Good Luck!
Lee Courtney
--- Jay West <jwest(a)classiccmp.org> wrote:
Ok folks, I'm officially desperate. I can't
figure
out what is wrong with
the 2100 IOP cpu memory section on my 2000/Access
system. So, just thought
I'd post this to the list....forgive my begging, it
isn't pretty *Grin*
Anyone have a working HP 2100 cpu available? I will
pay real $$$ at this
point, or trade probably just about anything I have
for one. If anyone has
one they will sell, or trade for, or give away to a
place (me) that will
actually use it and not throw it on a shelf, I would
like to know. I'd also
welcome any leads as to where one might be stored,
etc. Or, as an
alternative, if anyone has a magical device that
will instantly transfer all
of Tony Duell's repair knowledge and ability to my
brain, that might work ;)
FYI - I need either a 2100A or 2100S cpu. Don't need
or want any 21MX or
1000 type cpus.
Thanks!
---
[This E-mail scanned for viruses by Declude Virus]
__________________________________________________
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19 Jan
19 Jan
3:09 a.m.
Hmmm,
Last I heard, your memory section was flakey. Now the I/O system is not
working?
What exactly is the problem?
I've never been impressed with the HP2100A's, but we should be able to
figure out whats wrong
and fix it.
The biggest problem is going to be finding replacement chips, as much of
the machine is not TTL. But if we
can narrow it down to a board or chip, I think we can get your CPU
running again.
Jay West wrote:
Ok folks, I'm officially desperate. I can't
figure out what is wrong with
the 2100 IOP cpu memory section on my 2000/Access system. So, just thought
I'd post this to the list....forgive my begging, it isn't pretty *Grin*
Anyone have a working HP 2100 cpu available? I will pay real $$$ at this
point, or trade probably just about anything I have for one. If anyone has
one they will sell, or trade for, or give away to a place (me) that will
actually use it and not throw it on a shelf, I would like to know. I'd also
welcome any leads as to where one might be stored, etc. Or, as an
alternative, if anyone has a magical device that will instantly transfer all
of Tony Duell's repair knowledge and ability to my brain, that might work ;)
FYI - I need either a 2100A or 2100S cpu. Don't need or want any 21MX or
1000 type cpus.
Thanks!
---
[This E-mail scanned for viruses by Declude Virus]
3:45 a.m.
No, the I/O system is fine, it's just the memory section that is flaky. When
I said IOP I meant the I/O processor, meaning the other 2100 cpu in the
system (2000/Access uses two cpu's, one called the "system" cpu, the other
called the "I/O Processor" or "IOP" cpu. Both are regular 2100
cpu's. Just
so happens the system cpu on mine is a 2100A, the IOP cpu is a 2100S. And,
it's the 2100S that has bizarre memory problems.
I'm not that great with electronics... but I'm at my wits end. Spent so much
time on it I can't seem to see the forest for the trees. Hell I don't even
know where to start now. I have checked the PS levels, and they seem fine.
But what I have never checked is ripple on the power supply outputs, I think
core memory can get rather touchy about that. I think you just hook your
probe to the output and set AC coupling mode to see just the AC component,
and look to see how far the ripplyness swings off the baseline? That may be
the simple thing to check first. *sigh* I dunno. I do have the complete
diagrams manual for the system which includes schematics, but not enough
electronics ability to really make use of it.
So how goes things in your world? Was the job hunt ever fruitfull? What's
your current classic computer projects these days, yours are always
interesting! I haven't forgotten about that 11/34a up there either... just
looking for the right time to work that out if you're still willing. Thanks
for any advice on the 2100!
Jay West
----- Original Message -----
From: "Bob Shannon" <bshannon(a)tiac.net>
To: <cctalk(a)classiccmp.org>
Sent: Sunday, January 19, 2003 8:15 AM
Subject: Re: HP 2100 cpu plea
---
[This E-mail scanned for viruses by Declude Virus]
Hmmm,
Last I heard, your memory section was flakey. Now the I/O system is not
working?
What exactly is the problem?
I've never been impressed with the HP2100A's, but we should be able to
figure out whats wrong
and fix it.
The biggest problem is going to be finding replacement chips, as much of
the machine is not TTL. But if we
can narrow it down to a board or chip, I think we can get your CPU
running again.
Jay West wrote:
>Ok folks, I'm officially desperate. I can't figure out what is wrong with
>the 2100 IOP cpu memory section on my 2000/Access system. So, just
thought
>I'd post this to the list....forgive my
begging, it isn't pretty *Grin*
>
>Anyone have a working HP 2100 cpu available? I will pay real $$$ at this
>point, or trade probably just about anything I have for one. If anyone
has
>one they will sell, or trade for, or give away to
a place (me) that will
>actually use it and not throw it on a shelf, I would like to know. I'd
also
>welcome any leads as to where one might be stored,
etc. Or, as an
>alternative, if anyone has a magical device that will instantly transfer
all
>of Tony Duell's repair knowledge and ability
to my brain, that might work
;)
FYI - I need either a 2100A or 2100S cpu. Don't need or want any 21MX or
1000 type cpus.
Thanks!
---
[This E-mail scanned for viruses by Declude Virus]
8 a.m.
Oh yes, check the ripple FIRST!
I've strongly reccomended this to you before, its essential.
If the filter caps are really weak, you may see the ripple even with
your scope set for DC coupling. This
will of course appear as a low-amplitude sine wave riding ontop of the
DC voltage. You can keep increasing
the vertical gain, and moving the trace downwards (for a positive supply
voltage) so your only looking at
the AC component. But at some point, you will run out of vertical
position adjustment control range to keep
the display on-screen.
At this point you must use AC coupling to increase the vertical gain.
Flakey core memory that does not have bad bits or addresses is most
commonly due to incorrect power supply
voltages or current limit adjustments. Ripple in the memory supply
voltages falls into this general catagory.
If your less than comfortable with the scope measurments on a linear
power supply, you can try temporarily adding
an external filter cap in parallel, but this is often inconclusive.
See, if the original part is leaky, simply adding more
capactiance may not eliminate the problem. But if the ripple is more
due to a loss of capacitance than leakage (uncommon, but it happens)
then adding the parallel capacitor will show a large reduction in the
ripple. If this is
the case, you must replace the original filter cap.
If adding the external filter cap shows no reduction in measured ripple,
then there is little question that the original part is leaky and
needing replacement.
So this generally less-than-ideal trick might shed some light in your
particular case.
Jay West wrote:
No, the I/O system is fine, it's just the memory
section that is flaky. When
I said IOP I meant the I/O processor, meaning the other 2100 cpu in the
system (2000/Access uses two cpu's, one called the "system" cpu, the other
called the "I/O Processor" or "IOP" cpu. Both are regular 2100
cpu's. Just
so happens the system cpu on mine is a 2100A, the IOP cpu is a 2100S. And,
it's the 2100S that has bizarre memory problems.
I'm not that great with electronics... but I'm at my wits end. Spent so much
time on it I can't seem to see the forest for the trees. Hell I don't even
know where to start now. I have checked the PS levels, and they seem fine.
But what I have never checked is ripple on the power supply outputs, I think
core memory can get rather touchy about that. I think you just hook your
probe to the output and set AC coupling mode to see just the AC component,
and look to see how far the ripplyness swings off the baseline? That may be
the simple thing to check first. *sigh* I dunno. I do have the complete
diagrams manual for the system which includes schematics, but not enough
electronics ability to really make use of it.
So how goes things in your world? Was the job hunt ever fruitfull? What's
your current classic computer projects these days, yours are always
interesting! I haven't forgotten about that 11/34a up there either... just
looking for the right time to work that out if you're still willing. Thanks
for any advice on the 2100!
Jay West
----- Original Message -----
From: "Bob Shannon" <bshannon(a)tiac.net>
To: <cctalk(a)classiccmp.org>
Sent: Sunday, January 19, 2003 8:15 AM
Subject: Re: HP 2100 cpu plea
---
[This E-mail scanned for viruses by Declude Virus]
Hmmm,
Last I heard, your memory section was flakey. Now the I/O system is not
working?
What exactly is the problem?
I've never been impressed with the HP2100A's, but we should be able to
figure out whats wrong
and fix it.
The biggest problem is going to be finding replacement chips, as much of
the machine is not TTL. But if we
can narrow it down to a board or chip, I think we can get your CPU
running again.
Jay West wrote:
>Ok folks, I'm officially desperate. I can't figure out what is wrong with
>the 2100 IOP cpu memory section on my 2000/Access system. So, just
>
thought
>I'd post this to the list....forgive my
begging, it isn't pretty *Grin*
>
>Anyone have a working HP 2100 cpu available? I will pay real $$$ at this
>point, or trade probably just about anything I have for one. If anyone
>
has
>one they will sell, or trade for, or give away
to a place (me) that will
>actually use it and not throw it on a shelf, I would like to know. I'd
>
also
>welcome any leads as to where one might be
stored, etc. Or, as an
>alternative, if anyone has a magical device that will instantly transfer
>
all
>of Tony Duell's repair knowledge and
ability to my brain, that might work
>
;)
FYI - I
need either a 2100A or 2100S cpu. Don't need or want any 21MX or
1000 type cpus.
Thanks!
---
[This E-mail scanned for viruses by Declude Virus]
8:06 a.m.
Bob Shannon wrote:
Oh yes, check the ripple FIRST!
I've strongly reccomended this to you before, its essential.
If the filter caps are really weak, you may see the ripple even with
your scope set for DC coupling.
A fast and easy way of checking for ripple is to just use your DVM set
to AC Volts across the DC line.
7856
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bill_mcdermith＠yahoo.com -
bshannon＠tiac.net -
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