7 Feb
2004
7 Feb
'04
7:17 a.m.
Hello!
I sent an email about a month or two back to Al Kossow saying that I was starting work on
the PDP-7 again. With ungodly timing I proceeded to come down with the flu, travel abroad,
and move. So here I am again. ;)
I have come to the conclusion after some wire-tracing and so on, that this machine is
smoking crack, and that very little is where it should be (except for core memory,
everything seems right there). The processor has been modified ad nauseum, of course
without documentation of any kind.
Therefore, I need to take out all the modules, all the wires, and start afresh (might be a
good idea, anyway - - this way I can clean all the contacts properly). Thus, I need a
wire-wrapping tool. Does anyone here have one?
TIA
-tsb
7 Feb
7 Feb
10:40 a.m.
--- Tore S Bekkedal <toresbe(a)ifi.uio.no> wrote:
Hello!
I sent an email about a month or two back to Al
Kossow saying that I was starting work on the PDP-7
again. With ungodly timing I proceeded to come down
with the flu, travel abroad, and move. So here I am
again. ;)
I have come to the conclusion after some
wire-tracing and so on, that this machine is smoking
crack, and that very little is where it should be
(except for core memory, everything seems right
there). The processor has been modified ad nauseum,
of course without documentation of any kind.
Therefore, I need to take out all the modules, all
the wires, and start afresh (might be a good idea,
anyway - - this way I can clean all the contacts
properly). Thus, I need a wire-wrapping tool. Does
anyone here have one?
I know a guy who has a set. He asked $100. I can send
him email to contact you if you are interested.
TIA
-tsb
__________________________________
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1:51 p.m.
might try to get one of the power wire wrappers.....
makes life go faster....
ed sharpe
----- Original Message -----
From: "SHAUN RIPLEY" <vax3900(a)yahoo.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk(a)classiccmp.org>
Sent: Saturday, February 07, 2004 2:40 PM
Subject: Re: Wire Wrapper needed for PDP-7
--- Tore S Bekkedal <toresbe(a)ifi.uio.no> wrote:
Hello!
I sent an email about a month or two back to Al
Kossow saying that I was starting work on the PDP-7
again. With ungodly timing I proceeded to come down
with the flu, travel abroad, and move. So here I am
again. ;)
I have come to the conclusion after some
wire-tracing and so on, that this machine is smoking
crack, and that very little is where it should be
(except for core memory, everything seems right
there). The processor has been modified ad nauseum,
of course without documentation of any kind.
Therefore, I need to take out all the modules, all
the wires, and start afresh (might be a good idea,
anyway - - this way I can clean all the contacts
properly). Thus, I need a wire-wrapping tool. Does
anyone here have one?
I know a guy who has a set. He asked $100. I can send
him email to contact you if you are interested.
TIA
-tsb
__________________________________
Do you Yahoo!?
Yahoo! Finance: Get your refund fast by filing online.
http://taxes.yahoo.com/filing.html
8 Feb
8 Feb
4:40 p.m.
On Sat, 2004-02-07 at 16:51, Ed Sharpe wrote:
might try to get one of the power wire wrappers.....
makes life go faster....
Oh absolutely! AC powered. The battery ones are OK if the batteries are
new, but charge fades with use and your wrap quality drops. That really
sucks. The cord is a nuisance, but less so than loose wraps!
You're bringing back painful memories, stop the torture!
ed sharpe
----- Original Message -----
From: "SHAUN RIPLEY" <vax3900(a)yahoo.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk(a)classiccmp.org>
Sent: Saturday, February 07, 2004 2:40 PM
Subject: Re: Wire Wrapper needed for PDP-7
>
> --- Tore S Bekkedal <toresbe(a)ifi.uio.no> wrote:
> > Hello!
> >
> > I sent an email about a month or two back to Al
> > Kossow saying that I was starting work on the PDP-7
> > again. With ungodly timing I proceeded to come down
> > with the flu, travel abroad, and move. So here I am
> > again. ;)
> > I have come to the conclusion after some
> > wire-tracing and so on, that this machine is smoking
> > crack, and that very little is where it should be
> > (except for core memory, everything seems right
> > there). The processor has been modified ad nauseum,
> > of course without documentation of any kind.
> >
> > Therefore, I need to take out all the modules, all
> > the wires, and start afresh (might be a good idea,
> > anyway - - this way I can clean all the contacts
> > properly). Thus, I need a wire-wrapping tool. Does
> > anyone here have one?
> I know a guy who has a set. He asked $100. I can send
> him email to contact you if you are interested.
>
> >
> > TIA
> >
> > -tsb
> >
> >
>
> __________________________________
> Do you Yahoo!?
> Yahoo! Finance: Get your refund fast by filing online.
> http://taxes.yahoo.com/filing.html
>
>
7 Feb
7 Feb
10:45 a.m.
I have a bunch of wire wrappers and the wires to
go with them.
--
John Willis
UNIX Systems Administrator Associate
Lockheed Martin IS&S
CEO and Co-Founder
Coherent Logic Development
http://www.coherent-logic.com/
willisj(a)atlantis.clogic-int.com
12:49 p.m.
John,
Are you referring to:
1) manual (non-powered wire-wrap tools)
2) electric wire-wriap guns
3) CNC semi automated wire-wrap systems
4) retired job shoppers proficient in wire wrapping (especially high
density).
If item 3 or 4, pleas let me know...(I already have #1 and #2)
-----Original Message-----
From: cctalk-bounces(a)classiccmp.org
[mailto:cctalk-bounces@classiccmp.org]On Behalf Of John Willis
Sent: Saturday, February 07, 2004 4:46 PM
To: cctalk(a)classiccmp.org
Subject: Re: Wire Wrapper needed for PDP-7
I have a bunch of wire wrappers and the wires to
go with them.
--
John Willis
UNIX Systems Administrator Associate
Lockheed Martin IS&S
CEO and Co-Founder
Coherent Logic Development
http://www.coherent-logic.com/
willisj(a)atlantis.clogic-int.com
8 Feb
8 Feb
4:36 p.m.
On Sat, 2004-02-07 at 15:49, David V. Corbin wrote:
John,
Are you referring to:
1) manual (non-powered wire-wrap tools)
2) electric wire-wriap guns
3) CNC semi automated wire-wrap systems
4) retired job shoppers proficient in wire wrapping (especially high
density).
I'm hardly expert, but I've done it. The art of wirewrapping revolves
around one basic principle:
NEVER CHANGE LEVELS!
eg. posts will accept 2, 3 or 4 wraps per post.
When you wrap on a post, if it's the first (bottom) wrap, the other end
of the wire must be the first (bottom) wrap. If you are wiring a buss,
or a daisy-chained line like a clock, you do it thusly:
| | | | |
z.......z z.......z z.... . .
z z......z z.......z
The reason: rework. You'll rediscover all the First Principles if you
have to rework/repair/modify something done wrong.
THere's a variation in wirewrap gun types, the fist turn is with/without
insulation. I've only done prototype stuff that does the turn of
wire-plus-insulation, for added strength.
If item 3 or 4, pleas let me know...(I already have #1 and #2)
-----Original Message-----
From: cctalk-bounces(a)classiccmp.org
[mailto:cctalk-bounces@classiccmp.org]On Behalf Of John Willis
Sent: Saturday, February 07, 2004 4:46 PM
To: cctalk(a)classiccmp.org
Subject: Re: Wire Wrapper needed for PDP-7
I have a bunch of wire wrappers and the wires to
go with them.
--
John Willis
UNIX Systems Administrator Associate
Lockheed Martin IS&S
CEO and Co-Founder
Coherent Logic Development
http://www.coherent-logic.com/
willisj(a)atlantis.clogic-int.com
9 Feb
9 Feb
3:20 a.m.
>>>> "Tom" == Tom Jennings
<tomj(a)wps.com> writes:
Tom> THere's a variation in wirewrap gun types, the fist turn is
Tom> with/without insulation. I've only done prototype stuff that
Tom> does the turn of wire-plus-insulation, for added strength.
Yes. If the first turn has insulation, it's called a "modified"
wrap. The difference is in the wrap tool bit -- the bit for the
modified wrap has a bore for the wire that accepts the insulation up
to however far it needs to go to make that one wrap around. This
means that you have to be careful to seat the wire fully into the bit.
Modified wrap is stronger. The drawback is that it has more
inductance. You'd want to look at the original work to see which was
used and apply that to new work too.
For high speed logic, modified wrap would be a bad idea. I suspect
PDP-7s are not "high speed", and indeed I'm fairly sure that PDP-11s
used modified wrap too. On the other hand, a University of Illinois
project I've seen was done with ECL logic and standard wrap. (That
was for Cyber add-on memory.)
paul
7450
days inactive
7452
days old
7 comments
7 participants
participants (7)
-
dvcorbin＠optonline.net -
esharpe＠uswest.net -
pkoning＠equallogic.com -
tomj＠wps.com -
toresbe＠ifi.uio.no -
vax3900＠yahoo.com -
willisj＠atlantis.clogic-int.com