23 May
2001
23 May
'01
3:06 p.m.
Deer Sir;
I have just been given three ENIAC machines to display in a museum but they
are currently in Nigeria where they were used for nuclear weapons testing.
I can get them and preserve them for the National Museum of Science but I
need your help. They won't believe I am a serious collector unless I can
show them that I own a working PDP-1. I need you to box up and ship me a
working PDP-1 so that I can set it up and show it to them. Then they will
send me the three ENIACs by first class air mail. I will keep one, send one
to the museum and you can keep one. You will agree that an ENIAC, the first
digital computer, is much more valuable than a PDP-1 so you will understand
that I must keep the PDP-1 just in case they do a "surprise" inspection.
Thank you for your help, it is a good cause.
Sincerely,
Prof. Peabody.
-----------------------------------------------------------
:-)
23 May
23 May
5:07 p.m.
Thats good Chuck :-)
Chad Fernandez
Michigan, USA
Chuck McManis wrote:
Deer Sir;
I have just been given three ENIAC machines to display in a museum but they
are currently in Nigeria where they were used for nuclear weapons testing.
I can get them and preserve them for the National Museum of Science but I
need your help. They won't believe I am a serious collector unless I can
show them that I own a working PDP-1. I need you to box up and ship me a
working PDP-1 so that I can set it up and show it to them. Then they will
send me the three ENIACs by first class air mail. I will keep one, send one
to the museum and you can keep one. You will agree that an ENIAC, the first
digital computer, is much more valuable than a PDP-1 so you will understand
that I must keep the PDP-1 just in case they do a "surprise" inspection.
Thank you for your help, it is a good cause.
Sincerely,
Prof. Peabody.
-----------------------------------------------------------
:-)
9:43 p.m.
On 23 May, Chuck McManis wrote:
an ENIAC, the first digital computer
Ahhhm. May
I remind you that ENIAC was finished in 1945/46. At that
time Konrad Zuses Z3 (finished in 1941) was already working. See
http://irb.cs.tu-berlin.de/~zuse/Konrad_Zuse/en/index.html
for more details.
Also Konrad Zuses invented Plankalk?l, the first complete high-level
programming language.
--
tsch??,
Jochen
Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/
p.s. I think it is hard to say "XYZ was the first computer". In that
time many "first computers" where build by independent people.
24 May
24 May
12:04 a.m.
jkunz skrev:
p.s. I think it is hard to say "XYZ was the first
computer". In that
time many "first computers" where build by independent people.
I agree, but what about the Baby machine at Manhcester? ISTR from reading
"Computer" that something was missing from either ENIAC or EDSAC in order to
make it a "real" digital computer.
--
En ligne avec Thor 2.6a.
Alle meine Noten bringen mich nicht aus den N?ten, und ich schreibe noten
?berhaupt nur aus N?ten.
--- Ludwig van Beethoven
11:48 a.m.
On 24 May 2001, Iggy Drougge wrote:
>p.s. I think it is hard to say "XYZ was the
first computer". In that
>time many "first computers" where build by independent people.
Ah, but you're missing the obvious: take a good look at your fingers
on your keyboard, and you just may be looking at something very
similar to the first computing device... now, if you've got your shoes
and socks off, take a look at the end of your feet opposite your
heels, and you may be looking at something very similar to the first
expansion chasis, which doubled the computer's word size. :-)
--
Copyright (C) 2001 R. D. Davis The difference between humans & other animals:
All Rights Reserved an unnatural belief that we're above Nature &
rdd(a)perqlogic.com 410-744-4900 her other creatures, using dogma to justify such
http://www.perqlogic.com/rdd beliefs and to justify much human cruelty.
2:03 p.m.
On 24 May 2001, Iggy Drougge wrote:
I agree, but what about the Baby machine at
Manhcester? ISTR from
reading "Computer" that something was missing from either ENIAC or
EDSAC in order to make it a "real" digital computer.
I believe it was the sharing of code space with data.
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
25 May
25 May
2:15 a.m.
> I agree, but what about the Baby machine at
Manhcester? ISTR from
> reading "Computer" that something was missing from either ENIAC or
> EDSAC in order to make it a "real" digital computer.
I believe it was the sharing of code space with data.
So any 802/4/5x based thing is not a computer ???
Come on.
You are just talking Harward vs. von Neumann.
H.
--
VCF Europa 3.0 am 27./28. April 2002 in Muenchen
http://www.vcfe.org/
24 May
24 May
6:41 p.m.
On 24 May, Iggy Drougge wrote:
I agree, but what about the Baby machine at
Manhcester?
Baby machine? Do you mean the machines of Charles Babbage? As I know
these machines were not programmable.
--
tsch??,
Jochen
Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/
10:56 p.m.
On Fri, 25 May 2001 08:41:43 +0200 (CEST)
jkunz(a)unixag-kl.fh-kl.de wrote:
On 24 May, Iggy Drougge wrote:
> I agree, but what about the Baby machine at Manhcester?
Baby machine? Do you mean the machines of Charles
Babbage?
No, the "Baby" was built in 1948 at Manchester University
to test their Williams memory. It was a 32-bit
serial machine with about six instructions. It was the
first fully electronic, stored-program machine.
As far as I'm concerned, if it ran the first stored
program, then it's the first computer! Machines like Eniac
weren't stored-program and we'd call them "calculators"
nowadays.
If anyone's interested, there's a couple of good books on
this era by Simon Lavington. One's about early British
computers, while the other covers just the Manchester
machines. I also have a simulator for the "Baby", written
in C, somewhere.
--
John Honniball
Email: John.Honniball(a)uwe.ac.uk
University of the West of England
25 May
25 May
5:20 a.m.
On 25 May, John Honniball wrote:
[...]
Ahh. Good to know.
Baby machine?
Do you mean the machines of Charles Babbage?
No, the "Baby" was built in 1948 at Manchester University As far as I'm concerned, if it ran the first
stored
program, then it's the first computer! Machines like Eniac
weren't stored-program and we'd call them "calculators"
nowadays.
Yes and no. It just depends on your definition of "computer".
The Z3 is
often not called computer due to the lack of a branch instruction. But
as I wrote before: There are so many remarkable inventors and projects
in this area and that time, that I don't like to make a definite
decision about the "winner". Everyone deserves (the same amount of)
honor.
If anyone's interested, there's a couple of
good books on
this era by Simon Lavington.
I am afraid that these books are hard to get in
Germany.
--
tsch??,
Jochen
Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/
12:52 a.m.
jkunz skrev:
No, it was a very small (compared to its contemporaries) machine, built at (I
think) the university of Manchester in the forties or early fifties. ISTR that
it used mercury memory.
--
En ligne avec Thor 2.6a.
Fernsehen ist das einzige Schlafmittel, das mit den Augen genommen wird.
--- Vittorio de Sica
On 24 May, Iggy Drougge wrote:
I agree, but
what about the Baby machine at Manhcester?
Baby machine? Do you mean the machines of
Charles Babbage? As I know
these machines were not programmable.
1:56 a.m.
On 25 May 2001 13:52:42 +0100 Iggy Drougge
<optimus(a)canit.se> wrote:
jkunz skrev:
No, the National Physical Laboratory's machine, the Pilot
ACE, used mercury delay lines, as did Cambridge Uni's
EDSAC. But the Manchester machines used CRT (Cathode-Ray
Tube) memory, also generically known as electrostatic
memory. The CRTs were standard World War II surplus units,
and I think you can see one in the Science Museum's display
nowadays.
The memory was also the only output device in the "Baby",
since the CRTs had normal phosphor coating and the bits
glowed. Programs would halt, and the results would be read
On 24 May, Iggy Drougge wrote:
No, it was a very small (compared to its contemporaries) machine, built at (I
think) the university of Manchester in the forties or early fifties. ISTR that
it used mercury memory. I agree, but what about the Baby machine at
Manhcester?
Baby machine? Do you mean the machines of Charles Babbage? As I know
these machines were not programmable. from the CRT face.
--
John Honniball
Email: John.Honniball(a)uwe.ac.uk
University of the West of England
5:08 a.m.
On 25 May, John Honniball wrote:
No, the National Physical Laboratory's machine,
the Pilot
ACE, used mercury delay lines, as did Cambridge Uni's EDSAC.
And the CSIRAC
used mercury delay line memory too.
http://www.cs.mu.oz.au/csirac/
--
tsch??,
Jochen
Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/
5:59 a.m.
New subject: what is a CXY08-M good for?
I acquired a DECserver 550 for the KDJ11-SD in it, and now I have a pile of
these CXY08-M boards. It is an 8-line multiplexed serial I/O board, with
modem control. Are these good for anything besides building a DECserver?
Will I be able to find an RT-11 or UNIX driver for it? Or maybe, from the
CPU side, it might look enough like another DEC serial board that it will
work with an existing driver.
--
Jonathan Engdahl Rockwell Automation
Principal Research Engineer 24800 Tungsten Road
Advanced Technology Euclid, OH 44117 USA
Euclid Labs http://users.safeaccess.com/engdahl
6:50 a.m.
New subject: what is a CXY08-M good for?
It is supported under Ultrix and VMS, and I believe it is supported or at
least partially supported under netBSD. It uses either the DHV or DHQ
driver ( I can't recall which and my Ultrix machine isn't on)
On Fri, 25 May 2001, Jonathan Engdahl wrote:
I acquired a DECserver 550 for the KDJ11-SD in it, and
now I have a pile of
these CXY08-M boards. It is an 8-line multiplexed serial I/O board, with
modem control. Are these good for anything besides building a DECserver?
Will I be able to find an RT-11 or UNIX driver for it? Or maybe, from the
CPU side, it might look enough like another DEC serial board that it will
work with an existing driver.
--
Jonathan Engdahl Rockwell Automation
Principal Research Engineer 24800 Tungsten Road
Advanced Technology Euclid, OH 44117 USA
Euclid Labs http://users.safeaccess.com/engdahl
--
7 a.m.
New subject: what is a CXY08-M good for?
On 25 May, Jonathan Engdahl wrote:
I acquired a DECserver 550 for the KDJ11-SD in it, and
now I have a pile of
these CXY08-M boards. It is an 8-line multiplexed serial I/O board, with
modem control. Are these good for anything besides building a DECserver?
Will I be able to find an RT-11 or UNIX driver for it?
My "VAX 4000 Model 300
Technical Infornation", Chapter 2 "Option
Specifications" says the CXY08 emulates a DHV11 in DMA mode. So this
should work well with VMS, but perhaps not with UNIX, as UNIX does not
support DMA on the DHV11. Just give it a try.
--
tsch??,
Jochen
Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/
1:32 p.m.
New subject: what is a CXY08-M good for?
I acquired a DECserver 550 for the KDJ11-SD in it, and
now I have a pile
of these CXY08-M boards. It is an 8-line multiplexed serial I/O board,
with modem control. Are these good for anything besides building a
DECserver? Will I be able to find an RT-11 or UNIX driver for it? Or
maybe, from the CPU side, it might look enough like another DEC serial
board that it will work with an existing driver.
I don't know about third-party drivers, but RT-11 V5.6 and later
have latent support for the CXY08 boards... they are programmed
just like DHV/DHQ. They look nothing like a DL[V]...
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com |
| Unix Support Engineering Group | (home): mbg!world.std.com |
| Compaq Computer Corporation | addresses need '@' in place of '!' |
| 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ |
| Nashua, NH 03062 | "pdp-11 programmer - some assembler |
| (603) 884 1055 | required." - mbg KB1FCA |
+--------------------------------+-------------------------------------+
6:12 a.m.
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29 May
29 May
1:48 a.m.
On Fri, 25 May 2001 19:12:36 +0100 (BST) Tony Duell
<ard(a)p850ug1.demon.co.uk> wrote:
[Williams tube memory]
That's how I understand it, yes.
The memory was also the only output device in the
"Baby",
since the CRTs had normal phosphor coating and the bits
glowed. Programs would halt, and the results would be read
from the CRT face.
Are you sure? I thought there was a metal electrode over the front of the
CRT, and the signal picked up from that was fed back to refresh the
charge image on the CRT face (yes, this is a simplification). So if you moved the electrode to see the screen,
you'd lose the memory
contents.
Absolutely. There's a photo of a dual Williams tube module
in one of the books, hinged open in just this way.
I can well believe having a second CRT coupled up,
which had the same
deflection signals, and in which the beam intensity was controlled by the
amplified singal from the pickup electrode. That would display the memory
contents as an array of dots.
I think that must be how it worked. However, I've never
seen this clearly and completely explained! There's a CRT
lying in one of the racks in the middle of the photos of
the "Baby", above the input switch bank. The actual store
is in another rack, though.
And VCR97s [1] were not exactly uncommon,
adding a second one would not have been a problem
It would have been quite easy to wire up, yes.
[1] Valve Cathode Ray 97 IIRC. A very common radar CRT
from WW2. Common
enough that _I_ have one in the junk box.
Since you have one, could you tell me if it's
electrostatically deflected? I presume it is, making it
resemble an oscilloscope tube more than, say, a TV picture
tube?
--
John Honniball
Email: John.Honniball(a)uwe.ac.uk
University of the West of England
6:28 a.m.
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25 May
25 May
5:15 a.m.
New subject: Microwave oven collectors?
My 17 year old "microprocessor controlled" microwave oven stopped making
food hot the other night. Everything still appears and sounds about the
same, just food stays cold, and when it first happened there was a bit of
the smell of the gates of capacitor heaven being open. Should I take a
swing at fixing it, or yield to the cheap new inverter technology?
Victim is a Panasonic Dimension 3 microwave/convection oven (top of the
line those many moons ago). Location is SoCal.
5:43 a.m.
New subject: Microwave oven collectors?
Generally the reason that it functions correctly but does not heat is that
the poitn that 110v is sent to the 2K+ transformer to power the magnetron
(RF transmitter) has blown. Two types are generally used, either a relay or
a triac (semiconductor form of a relay). Trace the primary wires back to
where they meet the next component and you'll run into either a relay or a
triac. Either is cheap to change (if they are the fault) at an appliance
parts supplier. I generally make sure it's a gate/relay problem by first
hooking to the primary wired with a voltmeter (in ACV range of course) and
see if when it kicks in that there is 110 there or not. If not it's likely
the relay/triac, or may even be the board that supplies either triac gate
power or relay pulldown power. If 110 is present on the primary then you
likely have a dead magnetron. They are replaceable too but dependant on the
model they might make the unit obsolete by cost.
If the relay or triac have no trigger power then check for burnt resistors
first in the board's traces back from the relay or triac trigger point.
-----Original Message-----
From: owner-classiccmp(a)classiccmp.org
[mailto:owner-classiccmp@classiccmp.org]On Behalf Of Mike Ford
Sent: Friday, May 25, 2001 12:16 PM
To: classiccmp(a)classiccmp.org
Subject: Microwave oven collectors?
My 17 year old "microprocessor controlled" microwave oven stopped making
food hot the other night. Everything still appears and sounds about the
same, just food stays cold, and when it first happened there was a bit of
the smell of the gates of capacitor heaven being open. Should I take a
swing at fixing it, or yield to the cheap new inverter technology?
Victim is a Panasonic Dimension 3 microwave/convection oven (top of the
line those many moons ago). Location is SoCal.
5:46 a.m.
New subject: Microwave oven collectors?
BTW Panasonic parts are easy to find both at online/catalog parts sellers as
well as local appliance parts resellers. Many try to tell you this crap that
they don't sell to the public so I generally (used to before I started into
business) doing a Rockford and making a fake business card and letting them
charge me the tax, or if they didn't I posted it with my use tax at the end
of the year (or did I forget). Either way it's all BS and they will sell to
you as there isn't any license requirements for fixing appliances like there
is for air conditioning.
-----Original Message-----
From: owner-classiccmp(a)classiccmp.org
[mailto:owner-classiccmp@classiccmp.org]On Behalf Of Mike Ford
Sent: Friday, May 25, 2001 12:16 PM
To: classiccmp(a)classiccmp.org
Subject: Microwave oven collectors?
My 17 year old "microprocessor controlled" microwave oven stopped making
food hot the other night. Everything still appears and sounds about the
same, just food stays cold, and when it first happened there was a bit of
the smell of the gates of capacitor heaven being open. Should I take a
swing at fixing it, or yield to the cheap new inverter technology?
Victim is a Panasonic Dimension 3 microwave/convection oven (top of the
line those many moons ago). Location is SoCal.
6:03 a.m.
New subject: Microwave oven collectors?
Same thing happened to me a couple months ago. Buy your wife a nice new one,
she will be happy. Spend your time putting an old PDP-11 together instead.
--
Jonathan Engdahl Rockwell Automation
Principal Research Engineer 24800 Tungsten Road
Advanced Technology Euclid, OH 44117 USA
Euclid Labs http://users.safeaccess.com/engdahl
----- Original Message -----
From: "Mike Ford" <mikeford(a)socal.rr.com>
To: <classiccmp>
Sent: Friday, May 25, 2001 1:15 PM
Subject: Microwave oven collectors?
My 17 year old "microprocessor controlled"
microwave oven stopped making
food hot the other night. Everything still appears and sounds about the
same, just food stays cold, and when it first happened there was a bit of
the smell of the gates of capacitor heaven being open. Should I take a
swing at fixing it, or yield to the cheap new inverter technology?
Victim is a Panasonic Dimension 3 microwave/convection oven (top of the
line those many moons ago). Location is SoCal.
6:59 a.m.
New subject: Microwave oven collectors?
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7:39 a.m.
New subject: Microwave oven collectors?
Have to agree with the warning but I've come in contact with both the RF
(ouch I hate RF burns) and the HV side of the transformer. Most are 2kv in
the older ovens until you get to the 1000watt ovens. The capacitor is
genrally safe if he stays away from it as they have ultra-insulated covers,
like the anode of a CRT.
There was a site on the net that went into all of this but for the life of
me I can't locate it anymore. You think the webmaster cooked his ass working
on his own 'wave?
-----Original Message-----
From: owner-classiccmp(a)classiccmp.org
[mailto:owner-classiccmp@classiccmp.org]On Behalf Of Tony Duell
Sent: Friday, May 25, 2001 1:59 PM
To: classiccmp(a)classiccmp.org
Subject: Re: Microwave oven collectors?
My 17 year old "microprocessor controlled" microwave oven stopped making
food hot the other night. Everything still appears and sounds about the
same, just food stays cold, and when it first happened there
was a bit of
the smell of the gates of capacitor heaven being
open. Should I take a
swing at fixing it, or yield to the cheap new inverter technology?
FIrstly a word of warning. A microwave oven is by far the most dangerous
thing you're ever likely to work on. The power supply can provide about
4kV at a significant fraction of an amp. This will kill you if you touch
it. Not 'might kill you', but 'will kill you'.
It is a _lot_ more dangerous than the EHT supply in a monitor or TV, for
example.
And of course there's always the danger of microwave leakage.
If I wa going to fix it, I'd start by connecting a mains voltmeter (or
test lamp, or something like that) across the primary (mains side) of the
high voltage transformer. Try to 'cook' (have a cup of water or similar
in the oven as a load). If you get mains at that point, then the
controller, interlocks, etc are all working correctly. If not, then the
problem is on the mains side, which is somewhat safer to work on.
Assuming that you are getting mains to the HV transformer, then there are
basically only 4 parts in the microwave generator circuit. Discharge the
HV capacitor with a suitable bleeder resistor before touching anything :
The HV transformer (check the winding resistance when the unit is turned
off and unplugged)
The rectifier diode. This has a very high forward voltage drop (10s of
volts) and can't be checked with a normal ohmmeter or diode tester
The HV capacitor, for which you need a high voltage insulation tester to
make any reasonable tests on it.
The magnetron. You can check the filament continuity (disconnect it from
the transformer), should be very low, and for shorts between the filament
and the anode block. The latter is earthed, the filament runs at a high
-ve voltage wrt the chassis.
There is some more information in the sci.electronics.repair FAQ.
I must say, though, that I don't like working on microwave ovens, due to
the high voltage, high current PSU. Monitors and TVs don't bother me that
much, but the thought of working near a transformer that will supply 4kV
at 0.25A or so worries me.
If you do decide to open it up, take great care.
And as ever I am not responsible for any injury caused if you do attempt
to repair it.
-tony 
10:32 a.m.
New subject: Microwave oven collectors?
At 07:59 PM 5/25/01 +0100, you wrote:
>
> My 17 year old "microprocessor controlled" microwave oven stopped making
> food hot the other night. Everything still appears and sounds about the
> same, just food stays cold, and when it first happened there was a bit of
> the smell of the gates of capacitor heaven being open. Should I take a
> swing at fixing it, or yield to the cheap new inverter technology?
The biggest cause of failures in microwave ovens is the magnets.
They're made of a cheap material that loses it's magnetic strength. When
that happens, the electrons no longer spiral in the magnatron. Instead thy
try to go directly from the cathode to the anode and that causes the
magnatron to draw to much current and that causes it to shut down. To
repair it, you have to replace the magnitron which usually isn't cost
effective even if you can get the replacement part.
Joe
9:49 a.m.
New subject: OT-Re: Microwave oven collectors?
At 10:15 AM 25/05/2001 -0700, you wrote:
My 17 year old "microprocessor controlled"
microwave oven stopped making
food hot the other night. Everything still appears and sounds about the
same, just food stays cold, and when it first happened there was a bit of
the smell of the gates of capacitor heaven being open. Should I take a
swing at fixing it, or yield to the cheap new inverter technology?
Victim is a Panasonic Dimension 3 microwave/convection oven (top of the
line those many moons ago). Location is SoCal.
Suggest you scare it. The turntable in my Dimension 3 quit, motor
not running, and as soon as I brought home another used oven the "3"
started up again and is still going.
Cheers
Charlie Fox
Chas E. Fox Video Productions
793 Argyle Rd. Windsor ON N8Y 3J8
foxvideo(a)wincom.net
Check out:
Camcorder Kindergarten at http://chasfoxvideo.com
6:10 p.m.
New subject: OT-Re: Microwave oven collectors?
On Fri, 25 May 2001, Charles E. Fox wrote:
At 10:15 AM 25/05/2001 -0700, you wrote:
>My 17 year old "microprocessor controlled" microwave oven stopped making
[...]
>the smell of the gates of capacitor heaven being
open. Should I take a
>swing at fixing it, or yield to the cheap new inverter technology?
Suggest you scare it. The turntable in my
Dimension 3 quit, motor
not running, and as soon as I brought home another used oven the "3"
started up again and is still going.
Or... sell it on E-bilk as a vintage computer controlled microwave
oven used in the famed scientific discovery involving the CD Nuclear
Glow Test. Some sucker^H^H^H^H^H person with a high ratio of cash to
working brain cells seeking an investment just may purchase it iff you
ask enough for it, like some amount over US$50,000. Don't forget to
mention that this is also controlled by a classic piece of computing
technology... mention the microprocessor number in the ad and give a
few "impressive technical details."
--
Copyright (C) 2001 R. D. Davis The difference between humans & other animals:
All Rights Reserved an unnatural belief that we're above Nature &
rdd(a)perqlogic.com 410-744-4900 her other creatures, using dogma to justify such
http://www.perqlogic.com/rdd beliefs and to justify much human cruelty.
6:58 p.m.
New subject: OT-Re: Microwave oven collectors?
On Fri, 25 May 2001, Charles E. Fox wrote:
And make sure you say it is "RARE!" in the title and in the
description.
I always wonder if the people that have something like "This is
a RARE! TRS-80 Model 4 in perfect condition. You won't find
another of these in this fine condition ANYWHERE! Don't let
this one pass you by! It will sell high!" in their auctions
are either stupid, deceitful, or clueless. Esp. when their
auction is in the middle of about fifteen other items that are
exactly the same.
--
Eric Dittman
dittman(a)dittman.net
At 10:15 AM 25/05/2001 -0700, you wrote:
>My 17 year old "microprocessor controlled" microwave oven stopped making
[...]
>the smell of the gates of capacitor heaven
being open. Should I take a
>swing at fixing it, or yield to the cheap new inverter technology?
Suggest you scare it. The turntable in
my Dimension 3 quit, motor
not running, and as soon as I brought home another used oven the "3"
started up again and is still going.
Or... sell it on E-bilk as a vintage computer controlled microwave
oven used in the famed scientific discovery involving the CD Nuclear
Glow Test. Some sucker^H^H^H^H^H person with a high ratio of cash to
working brain cells seeking an investment just may purchase it iff you
ask enough for it, like some amount over US$50,000. Don't forget to
mention that this is also controlled by a classic piece of computing
technology... mention the microprocessor number in the ad and give a
few "impressive technical details."
23 May
23 May
9:47 p.m.
Okay Chuck, whatever you say...
Sherman
-----Original Message-----
From: owner-classiccmp(a)classiccmp.org
[mailto:owner-classiccmp@classiccmp.org]On Behalf Of Chuck McManis
Sent: Wednesday, May 23, 2001 10:07 PM
To: classiccmp(a)classiccmp.org
Subject: Need help
Deer Sir;
I have just been given three ENIAC machines to display in a
museum but they
are currently in Nigeria where they were used for nuclear weapons
testing.
I can get them and preserve them for the National Museum of Science but I
need your help. They won't believe I am a serious collector unless I can
show them that I own a working PDP-1. I need you to box up and ship me a
working PDP-1 so that I can set it up and show it to them. Then they will
send me the three ENIACs by first class air mail. I will keep
one, send one
to the museum and you can keep one. You will agree that an ENIAC,
the first
digital computer, is much more valuable than a PDP-1 so you will
understand
that I must keep the PDP-1 just in case they do a "surprise" inspection.
Thank you for your help, it is a good cause.
Sincerely,
Prof. Peabody.
-----------------------------------------------------------
:-)
24 May
24 May
5:29 a.m.
New subject: ID this board: M7165
Hi,
This guy is auctioning a:
Vax QBUS KDA50 Disk Ctl (M7165)
http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1240600239
What sort of interface is this? It almost looks SMD.
Guess it isn't, also rule out SCSI and MFM, by appearances.
Standard disflamer: This is Not my auction.
John A.
5:56 a.m.
New subject: ID this board: M7165
It's for controlling drives like the RA81 and RA92.
g.
On Thu, 24 May 2001, John Allain wrote:
Hi,
This guy is auctioning a:
Vax QBUS KDA50 Disk Ctl (M7165)
http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1240600239
What sort of interface is this? It almost looks SMD.
Guess it isn't, also rule out SCSI and MFM, by appearances.
Standard disflamer: This is Not my auction.
John A.
5:57 a.m.
New subject: ID this board: M7165
It's SDI, whatever that is. I have the same board sitting here on my
lap. Unfortunetly is is only 1 board of a 2 board set :-(
I wouldn'y bid on it. If you really want one you can have mine.... it's
not doing me any good. I bought it in a group of boards.
Chad Fernandez
Michigan, USA
John Allain wrote:
Hi,
This guy is auctioning a:
Vax QBUS KDA50 Disk Ctl (M7165)
http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1240600239
What sort of interface is this? It almost looks SMD.
Guess it isn't, also rule out SCSI and MFM, by appearances.
Standard disflamer: This is Not my auction.
John A.
6:04 a.m.
New subject: ID this board: M7165
On Thu, 24 May 2001, John Allain wrote:
Hi,
This guy is auctioning a:
Vax QBUS KDA50 Disk Ctl (M7165)
http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1240600239
What sort of interface is this? It almost looks SMD.
Guess it isn't, also rule out SCSI and MFM, by appearances.
SDI?
Standard disflamer: This is Not my auction.
John A.
Peter Wallace
Mesa Electronics
6:52 a.m.
New subject: ID this board: M7165
This guy is auctioning a:
Vax QBUS KDA50 Disk Ctl (M7165)
http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1240600239
What sort of interface is this? It almost looks SMD.
Guess it isn't, also rule out SCSI and MFM, by appearances.
SDI?
6:12 a.m.
New subject: ID this board: M7165
From Megan Gentry's Field Guide to the PDP-11:
-------------------------------------------------------------------------
M7164 KDA50-Q Q Qbus SDI disk adapter, Q22 (1 of 2) (QDA SDI)
M7164 Refs: EK-KDA5Q-UG, uNOTE N#041
M7165 KDA50-Q Q Qbus SDI disk adapter, Q22 (2 of 2) (QDA SDI)
M7165 Refs: EK-KDA5Q-UG, uNOTE N#041
-------------------------------------------------------------------------
It looks like what you have here is 1/2 of an SDI adapter.
Now the next question: what is SDI? I'll assume for now that is was an early
approximation to SCSI, something proprietary to DEC.
Nice card ejectors though -- I need a set for a recently purchased S-box
KDJ11-SD.
--
Jonathan Engdahl Rockwell Automation
Principal Research Engineer 24800 Tungsten Road
Advanced Technology Euclid, OH 44117 USA
Euclid Labs engdahl(a)cle.ab.com 216-266-6409
----- Original Message -----
From: "John Allain" <allain(a)panix.com>
To: <classiccmp>
Sent: Thursday, May 24, 2001 1:29 PM
Subject: ID this board: M7165
Hi,
This guy is auctioning a:
Vax QBUS KDA50 Disk Ctl (M7165)
http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1240600239
What sort of interface is this? It almost looks SMD.
Guess it isn't, also rule out SCSI and MFM, by appearances.
Standard disflamer: This is Not my auction.
John A.
8:07 a.m.
New subject: ID this board: M7165
On 24 May, Jonathan Engdahl wrote:
Now the next question: what is SDI? I'll assume
for now that is was an early
approximation to SCSI, something proprietary to DEC.
http://www.netbsd.org/Documentation/Hardware/Machines/DEC/vax/busses.html#b…
Is all I know and I am interrested to know more about SDI. (The same
for DSSI.)
--
tsch??,
Jochen
Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/
5:58 p.m.
New subject: ID this board: M7165
Jonathan Engdahl wrote:
Nice card ejectors though -- I need a set for a recently purchased S-box
KDJ11-SD.
--
Jonathan Engdahl Rockwell Automation
Principal Research Engineer 24800 Tungsten Road
Advanced Technology Euclid, OH 44117 USA
Euclid Labs engdahl(a)cle.ab.com 216-266-6409
If you can't come up with a set I can pull a pair off of a stack
of DOA boards at work that are about to be trashed.
...... nick oliviero
11:52 a.m.
ROLF!!! Can I borrow a PDP-1???? I wanna get in on this deal!!!
On Wed, 23 May 2001, Chuck McManis wrote:
Deer Sir;
I have just been given three ENIAC machines to display in a museum but they
are currently in Nigeria where they were used for nuclear weapons testing.
I can get them and preserve them for the National Museum of Science but I
need your help. They won't believe I am a serious collector unless I can
show them that I own a working PDP-1. I need you to box up and ship me a
working PDP-1 so that I can set it up and show it to them. Then they will
send me the three ENIACs by first class air mail. I will keep one, send one
to the museum and you can keep one. You will agree that an ENIAC, the first
digital computer, is much more valuable than a PDP-1 so you will understand
that I must keep the PDP-1 just in case they do a "surprise" inspection.
Thank you for your help, it is a good cause.
Sincerely,
Prof. Peabody.
-----------------------------------------------------------
:-)
8925
days inactive
8931
days old
40 comments
24 participants
participants (24)
-
allain＠panix.com -
ard＠p850ug1.demon.co.uk -
cmcmanis＠mcmanis.com -
dittman＠dittman.net -
engdahl＠cle.ab.com -
fernande＠internet1.net -
foo＠siconic.com -
foxvideo＠wincom.net -
geneb＠deltasoft.com -
Hans.Franke＠mch20.sbs.de -
jfoust＠threedee.com -
jkunz＠unixag-kl.fh-kl.de -
John.Honniball＠uwe.ac.uk -
lemay＠cs.umn.edu -
mbg＠world.std.com -
mikeford＠socal.rr.com -
oliv555＠arrl.net -
optimus＠canit.se -
pcw＠mesanet.com -
rdd＠smart.net -
rhblake＠bigfoot.com -
rigdonj＠intellistar.net -
thompson＠mail.athenet.net -
vaxman＠qwest.net