2 Sep
2002
2 Sep
'02
2:30 p.m.
This sort of reminds me that the village isn't quite so global...Even though
the marketing says so...
Brasso is an Australian Trademark. It may not exist elsewhere.
Doug Jackson
MSS Operations Manager
Citadel Securix
(02) 6290 9011 (Ph)
(02) 6262 6152 (Fax)
(0414) 986 878 (mobile)
-----Original Message-----
From: Geoff Roberts [mailto:geoffrob@stmarks.pp.catholic.edu.au]
Sent: Tuesday, September 03, 2002 12:19 PM
To: cctalk(a)classiccmp.org
Subject: Re: OT: dumpster dive and water/mold cleanup
----- Original Message -----
From: "Chris" <mythtech(a)mac.com>
To: <cctalk(a)classiccmp.org>
Sent: Tuesday, September 03, 2002 11:14 AM
Subject: Re: OT: dumpster dive and water/mold cleanup
Liquid brass polish. Been around forever. There is a
companion product for
silver called, oddly enough, Silvo which is a bit finer in
composition I
believe.
Brasso works very well on scratched cds, I've got a couple that were
unplayable/readable
and now look and play like new. Requires patience. I don't
recommend power
tools in this
application though I have resorted to putting the cd in a holder on a
variable speed drill for really
heavy scratching that was going to take forever by hand.
That worked, with
a chux and plenty of
brasso.
Cheers
Geoff in Oz
CAUTION - The information in this message may be of a privileged or confidential nature
intended only for the use of the addressee or someone authorised to receive the
addressee's e-mail. If you are not the intended recipient, you are hereby notified
that any dissemination, distribution or copying of this e-mail is strictly prohibited. If
you have received this email in error please notify postmaster(a)citadel.com.au. Any views
expressed in this message are those of the individual
sender and may not necessarily reflect the views of Citadel Securix.
Feel free to visit the Citadel Securix website! Click below.
http://www.citadel.com.au
I've
found that 'Brasso' applied by hand can descratch a CD
that was unreadable due to serious scratching and make it
useable.
What's Brasso? 
2 Sep
2 Sep
3:37 p.m.
On Tue, 3 Sep 2002, Doug Jackson wrote:
This sort of reminds me that the village isn't
quite so global...Even though
the marketing says so...
Brasso is an Australian Trademark. It may not exist elsewhere.
Well, our military folks were well acquainted with it in WWII. Just the
thing for buttons and bright work, you know.
- don
Doug Jackson
MSS Operations Manager
Citadel Securix
(02) 6290 9011 (Ph)
(02) 6262 6152 (Fax)
(0414) 986 878 (mobile)
-----Original Message-----
From: Geoff Roberts [mailto:geoffrob@stmarks.pp.catholic.edu.au]
Sent: Tuesday, September 03, 2002 12:19 PM
To: cctalk(a)classiccmp.org
Subject: Re: OT: dumpster dive and water/mold cleanup
----- Original Message -----
From: "Chris" <mythtech(a)mac.com>
To: <cctalk(a)classiccmp.org>
Sent: Tuesday, September 03, 2002 11:14 AM
Subject: Re: OT: dumpster dive and water/mold cleanup
Liquid brass polish. Been around forever. There is a
companion product for
silver called, oddly enough, Silvo which is a bit finer in
composition I
believe.
Brasso works very well on scratched cds, I've got a couple that were
unplayable/readable
and now look and play like new. Requires patience. I don't
recommend power
tools in this
application though I have resorted to putting the cd in a holder on a
variable speed drill for really
heavy scratching that was going to take forever by hand.
That worked, with
a chux and plenty of
brasso.
Cheers
Geoff in Oz
CAUTION - The information in this message may be of a privileged or confidential nature
intended only for the use of the addressee or someone authorised to receive the
addressee's e-mail. If you are not the intended recipient, you are hereby notified
that any dissemination, distribution or copying of this e-mail is strictly prohibited. If
you have received this email in error please notify postmaster(a)citadel.com.au. Any views
expressed in this message are those of the individual
sender and may not necessarily reflect the views of Citadel Securix.
Feel free to visit the Citadel Securix website! Click below.
http://www.citadel.com.au
I've
found that 'Brasso' applied by hand can descratch a CD
that was unreadable due to serious scratching and make it
useable.
What's Brasso? 
3 Sep
3 Sep
9:48 a.m.
At 08:37 PM 9/2/02 -0700, Don wrote:
It's STILL around, I got plenty of experience with it in VietNam era and one of my
kids is using it today in ROTC. The stuff is MANDATORY to anyone in the military.
Joe
Brasso is an
Australian Trademark. It may not exist elsewhere.
Well, our military folks were well acquainted with it in WWII. Just the
thing for buttons and bright work, you know.
2 Sep
2 Sep
4:13 p.m.
Doug Jackson wrote:
This sort of reminds me that the village isn't
quite so global...Even
though the marketing says so...
Brasso is an Australian Trademark. It may not exist elsewhere.
Doug Jackson
I would imagine that it is Trademarked in several places. Trademarks
don't go beyond borders do they?
We certainly have Brasso in the US. It's one of those products that's
been around forever.
Chad Fernandez
Michigan, USA
4:51 p.m.
I would imagine that it is Trademarked in several
places. Trademarks
don't go beyond borders do they?
We certainly have Brasso in the US. It's one of those products that's
been around forever.
Chad Fernandez
Michigan, USA
Here's more info than you want to know. The mark is owned by Reckitt &
Colman,
now known as Reckitt Benckiser, and fka Reckitt & Sons, a UK company. According
to the company website, it opened its first foreign office in Australia in 1886.
(http://www.reckitt.com/about/history.cfm) Brasso was originally launched in
1905. The U.S. registration from the U.S. Patent and Trademark Office website
(see http://tess.uspto.gov/bin/showfield?f=doc&state=gs1u66.2.1) is below. Note
the first use in commerce date:
Word Mark BRASSO
Goods and Services IC 003. US 004. G & S: polish for pewter, brass,
chrome, copper and stainless steel. FIRST USE: 19050900. FIRST USE IN COMMERCE:
19050900
Mark Drawing Code (1) TYPED DRAWING
Serial Number 74138002
Filing Date February 11, 1991
Published for Opposition October 22, 1991
Registration Number 1671556
Registration Date January 14, 1992
Owner (REGISTRANT) RECKITT & COLMAN INC. CORPORATION DELAWARE 1655 Valley
Road Wayne NEW JERSEY 07470
Assignment Recorded ASSIGNMENT RECORDED
Prior Registrations 0068712
Type of Mark TRADEMARK
Register PRINCIPAL
Affidavit Text SECT 15. SECT 8 (6-YR). SECTION 8(10-YR) 20020227.
Renewal 1ST RENEWAL 20020227
Live/Dead Indicator LIVE
11:46 p.m.
This sort of reminds me that the village isn't
quite so
global...Even though the marketing says so...
Brasso is an Australian Trademark. It may not exist elsewhere.
Actually the US Navy used it for years. That and NeverDull.
Haven't seen Brasso around much lately though.
Jeff
--
Home of the TRS-80 Model 2000 FAQ File
http://www.cchaven.com
http://www.geocities.com/siliconvalley/lakes/6757
3 Sep
3 Sep
7:53 a.m.
Hi
Doug Jackson <doug_jackson(a)citadel.com.au> said:
This sort of reminds me that the village isn't
quite so global...Even though
the marketing says so...
Brasso is an Australian Trademark. It may not exist elsewhere.
Definitely British, by Reckitt and Colman, by appointment to Her Majesty
Queen Elizabeth II. Sold all over Europe...
Sevenpence ha'penny a tin in 1939 acccording to the Army and Navy catalogue!
Good for rejuvenating tired paint and plastic as well.
--
Cheers,
Stan Barr stanb(a)dial.pipex.com
The future was never like this!
3:14 p.m.
Brasso, like the same stuff (wadding with smelly petrolueum compounds) that
I used on my uniform brass in Army ROTC and in the active duty AF world to
polish brass knobs (AF uniform "brass" was silverplate and didn't need
Brasso)? Hmm...didn't know it was a non-US product. I also didn't know it
was good for paint, thought it might do badly on the paint like a solvent.
-----Original Message-----
From: cctalk-admin(a)classiccmp.org [mailto:cctalk-admin@classiccmp.org]On
Behalf Of Stan Barr
Sent: Tuesday, September 03, 2002 3:07 AM
To: cctalk(a)classiccmp.org
Subject: Re: OT: dumpster dive and water/mold cleanup
Hi
Doug Jackson <doug_jackson(a)citadel.com.au> said:
This sort of reminds me that the village isn't
quite so global...Even
though
the marketing says so...
Brasso is an Australian Trademark. It may not exist elsewhere.
Definitely British, by Reckitt and Colman, by appointment to Her Majesty
Queen Elizabeth II. Sold all over Europe...
Sevenpence ha'penny a tin in 1939 acccording to the Army and Navy catalogue!
Good for rejuvenating tired paint and plastic as well.
--
Cheers,
Stan Barr stanb(a)dial.pipex.com
The future was never like this!
3:30 p.m.
On Tue, 3 Sep 2002, Russ Blakeman wrote:
Brasso, like the same stuff (wadding with smelly
petrolueum compounds)
that I used on my uniform brass in Army ROTC and in the active duty AF
world to polish brass knobs (AF uniform "brass" was silverplate and
didn't need Brasso)? Hmm...didn't know it was a non-US product. I also
didn't know it was good for paint, thought it might do badly on the
paint like a solvent.
I've seen some silver plated stuff damaged badly from Brasso, so I know
its not for use on such things. I'd always heard it was for use on brass
only.
-Toth
6:16 p.m.
That was my thought as well but I know it does a bamg up job on restoring
old chromed kitchen appliances, shines that dullness right out but wears the
chrome of the newer chrome plated plastic items
-----Original Message-----
From: cctalk-admin(a)classiccmp.org [mailto:cctalk-admin@classiccmp.org]On
Behalf Of Tothwolf
Sent: Tuesday, September 03, 2002 10:41 PM
To: cctalk(a)classiccmp.org
Subject: RE: OT: dumpster dive and water/mold cleanup
On Tue, 3 Sep 2002, Russ Blakeman wrote:
Brasso, like the same stuff (wadding with smelly
petrolueum compounds)
that I used on my uniform brass in Army ROTC and in the active duty AF
world to polish brass knobs (AF uniform "brass" was silverplate and
didn't need Brasso)? Hmm...didn't know it was a non-US product. I also
didn't know it was good for paint, thought it might do badly on the
paint like a solvent.
I've seen some silver plated stuff damaged badly from Brasso, so I know
its not for use on such things. I'd always heard it was for use on brass
only.
-Toth
4 Sep
4 Sep
7:48 a.m.
Hi,
Tothwolf <tothwolf(a)concentric.net> said:
On Tue, 3 Sep 2002, Russ Blakeman wrote:
> Brasso, like the same stuff (wadding with smelly petrolueum compounds)
> that I used on my uniform brass in Army ROTC and in the active duty AF
> world to polish brass knobs (AF uniform "brass" was silverplate and
> didn't need Brasso)? Hmm...didn't know it was a non-US product. I also
> didn't know it was good for paint, thought it might do badly on the
> paint like a solvent.
Obviously, try it on a part that's hidden from view first, just in case.
But I've never had a problem. I was using it the other day to clean
up the case of a Racal counter/timer - looks a treat now after removing
the RAF grime!
I've seen some silver plated stuff damaged badly from Brasso, so I know
its not for use on such things. I'd always heard it was for use on brass
only.
Yes, Brasso works by abrading a thin layer off the surface, and will
eventually remove the silver plating. My mother has several "brass"
ornaments that were once silver plated!
The stuff with wadding was called "Dura-Glit" I think.
--
Cheers,
Stan Barr stanb(a)dial.pipex.com
The future was never like this!
3 Sep
3 Sep
5:47 p.m.
New subject: It lives! Imlac PDS-1, serial #2 is running again.
Hey,
After a small battle, and several hundred hand-soldered decoupling caps
(the original engineers figured they didnt need any), and a few dead
bugs, I've gotten an Imlac PDS-1 running once again.
The original Imlac hardware design divided the main CPU and display
processor up onto about 65 small cards with a handful of TTL chips on
each. No ground planes at all, and the 'decoupling' consists of a 15 uf
bulk cap on each board along with a ferite bead inductor. No high speed
decoupling caps, with the exception of 3 chips on the clock generator board.
With a few decades of age on the linear power supply filter caps, the
logic supply noise was amazing, often over 4 volts peak to peak on the
+5 rails. Small wonder the machine would crash and hang, its kind of
amazing it ever ran this way at all.
So a good deal of the work I had to do to get this machine running again
was to hand-solder several hundred decoupling caps, one for each chip in
the machine, more or less. I could have re-capped the main supply, but
given
the inductance between that filter cap and all those un-decoupled TTL
chips, adding the decoupling caps at the end of those long power supply
leads made more sense. After all, the nose at the power supply filter
caps was nearly zero, while the ground bounch on each small logic board
was quite large. Without a ground plane, the TTL chips had to seek a
common ground through long thin runs of etch, so I added the caps as
close to the power and ground pins of each package.
While this is hardly original to the machine's original design, I know
of no other practial solution to getting this rare old machine running
properly, so out came the soldering iron.
I still have a massive ammount of cosmetic restoration to do, but
getting to see it run its "HELLO" test program with green
vector-generated characters was well worth a few days with the iron and
scope in hand.
By the way, during my debugging, I came across a bad 7473. Its a odd
little JK flip flop, and I'd like to find a replacement. Note that the
74LS73A is NOT compatible, its got a different truth table! Should
anyone have one of these kicking around, please let me know.
And now, its time to sleep....
4 Sep
4 Sep
12:28 a.m.
New subject: It lives! Imlac PDS-1, serial #2 is running again.
Congratulations Bob, good job! I know the feeling of seeing that display
come up
very well.
Jameco still carries the straight 7473 part.
Maybe next time that there is a VCF East, we can link our two Imlacs and play
maze war.
--tom
At 01:49 AM 9/4/2002 -0400, you wrote:
Hey,
After a small battle, and several hundred hand-soldered decoupling caps
(the original engineers figured they didnt need any), and a few dead bugs,
I've gotten an Imlac PDS-1 running once again.
The original Imlac hardware design divided the main CPU and display
processor up onto about 65 small cards with a handful of TTL chips on
each. No ground planes at all, and the 'decoupling' consists of a 15 uf
bulk cap on each board along with a ferite bead inductor. No high speed
decoupling caps, with the exception of 3 chips on the clock generator board.
With a few decades of age on the linear power supply filter caps, the
logic supply noise was amazing, often over 4 volts peak to peak on the +5
rails. Small wonder the machine would crash and hang, its kind of amazing
it ever ran this way at all.
So a good deal of the work I had to do to get this machine running again
was to hand-solder several hundred decoupling caps, one for each chip in
the machine, more or less. I could have re-capped the main supply, but given
the inductance between that filter cap and all those un-decoupled TTL
chips, adding the decoupling caps at the end of those long power supply
leads made more sense. After all, the nose at the power supply filter
caps was nearly zero, while the ground bounch on each small logic board
was quite large. Without a ground plane, the TTL chips had to seek a
common ground through long thin runs of etch, so I added the caps as close
to the power and ground pins of each package.
While this is hardly original to the machine's original design, I know of
no other practial solution to getting this rare old machine running
properly, so out came the soldering iron.
I still have a massive ammount of cosmetic restoration to do, but getting
to see it run its "HELLO" test program with green vector-generated
characters was well worth a few days with the iron and scope in hand.
By the way, during my debugging, I came across a bad 7473. Its a odd
little JK flip flop, and I'd like to find a replacement. Note that the
74LS73A is NOT compatible, its got a different truth table! Should anyone
have one of these kicking around, please let me know.
And now, its time to sleep....
4:58 a.m.
New subject: It lives! Imlac PDS-1, serial #2 is running again.
On Wed, 4 Sep 2002, Tom Uban wrote:
Maybe next time that there is a VCF East, we can link
our two Imlacs and
play maze war.
Figure sometime between early April and early June for the next VCF East.
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 *
5:18 a.m.
New subject: Another VCF East!? was: Re: It lives! Imlac PDS-1, serial #2 is running again.
Another VCF East!?
Very cool. I'll have to bring a much larger machine this time!
Sellam Ismail wrote:
On Wed, 4 Sep 2002, Tom Uban wrote:
Maybe next time that there is a VCF East, we can
link our two Imlacs and
play maze war.
Figure sometime between early April and early June for the next VCF East.
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 *
5 Sep
5 Sep
5:05 a.m.
New subject: Another VCF East!? was: Re: It lives! Imlac PDS-1, serial #2 is running again.
On Wed, 4 Sep 2002, Bob Shannon wrote:
Another VCF East!?
Very cool. I'll have to bring a much larger machine this time!
I'm most probably going to be bringing some IBM big iron. If I can come
up the money to truck the stuff in, that is. 8-)
Peace... Sridhar
Sellam Ismail wrote:
On Wed, 4 Sep 2002, Tom Uban wrote:
Maybe next time that there is a VCF East, we can
link our two Imlacs and
play maze war.
Figure sometime between early April and early June for the next VCF East.
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 *
4 Sep
4 Sep
4:54 a.m.
New subject: It lives! Imlac PDS-1, serial #2 is running again.
On Wed, 4 Sep 2002, Bob Shannon wrote:
After a small battle, and several hundred
hand-soldered decoupling caps
(the original engineers figured they didnt need any), and a few dead
bugs, I've gotten an Imlac PDS-1 running once again.
Totally awesome! I hope you can post some pictures of it. Is this the
one you got from Tom Uban at VCF East?
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 *
5:16 a.m.
New subject: It lives! Imlac PDS-1, serial #2 is running again.
Yep, this is the Imlac I got from Tom after seeing his PDS-1D at VCF.
I traded an old PDP 11 and some spare boards for the PDS-1(a?),
documentation and spare parts.
Now I've got to get a way to load the 4K terminal program into memory
quickly and reliably (my Imlac
has had the core memory replaced with SRAM), and interface it to one of
my HP minis!
Of course the first 'host' machine that comes to my mind is my HP 2116C,
simply because of the
front pannel being such a cool match for the Imlac's programmers console...
Pictures eh? Hmmm, I really ought to get some digital photos of some of
my more interesting machines on
line.
Sellam Ismail wrote:
On Wed, 4 Sep 2002, Bob Shannon wrote:
After a small battle, and several hundred
hand-soldered decoupling caps
(the original engineers figured they didnt need any), and a few dead
bugs, I've gotten an Imlac PDS-1 running once again.
Totally awesome! I hope you can post some pictures of it. Is this the
one you got from Tom Uban at VCF East?
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 *
7:14 a.m.
New subject: It lives! Imlac PDS-1, serial #2 is running again.
On Wed, 4 Sep 2002, Bob Shannon wrote:
Yep, this is the Imlac I got from Tom after seeing his
PDS-1D at VCF.
I traded an old PDP 11 and some spare boards for the PDS-1(a?),
documentation and spare parts.
Don't tell Tom, but I definitely think you got the better end of the deal
;)
Now I've got to get a way to load the 4K terminal
program into memory
quickly and reliably (my Imlac has had the core memory replaced with
SRAM), and interface it to one of my HP minis!
The PDS-1D I got came with the software and documentation for
boot-strapping it off the serial port. Maybe you can do it that way? If
I can find where I stored this stuff I can lend it to you if it would be
helpful.
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 *
7:39 a.m.
New subject: It lives! Imlac PDS-1, serial #2 is running again.
At 04:15 AM 9/4/2002 -0700, you wrote:
When you say "software", what all do you mean? Do you have any additional
software which runs on the Imlac, which I don't have in my collection?
This is how I load my machine. I think that Bob has the serial loader
information
as well, and if he does not, the documentation is on Al's site:
http://www.spies.com/~aek/pdf/imlac/
When are you going to get your machine running Sellam?
--tom
On Wed, 4 Sep 2002, Bob Shannon wrote:
LOL! Well, I still have my PDS-1D and I am happy that Bob is interested
enough to get the PDS-1 running. Note, the "D" stands for Dense, as in
a more densely packed set of hardware. In the PDS-1D, they put more
logic into the same physical space.
Yep, this is the Imlac I got from Tom after
seeing his PDS-1D at VCF.
I traded an old PDP 11 and some spare boards for the PDS-1(a?),
documentation and spare parts.
Don't tell Tom, but I definitely think you got the better end of the deal
;) Now I've
got to get a way to load the 4K terminal program into memory
quickly and reliably (my Imlac has had the core memory replaced with
SRAM), and interface it to one of my HP minis!
The PDS-1D I got came with the software and documentation for
boot-strapping it off the serial port. Maybe you can do it that way? If
I can find where I stored this stuff I can lend it to you if it would be
helpful. 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 *
2:04 p.m.
New subject: It lives! Imlac PDS-1, serial #2 is running again.
On Wed, 4 Sep 2002, Tom Uban wrote:
The guy I got it from wrote his own bootstrapper on a CP/M machine and
cross-assmebled it to the IMLAC. He wrote all the tools himself. For a
guy that didn't think there would be a problem of storing this thing
outside for 5 years before I got my hands on it, he actually was smart
(once).
The way it works, you load the disk up on the CP/M machine (in this case
it was a Cromemco Z1) and it readies the serial port. Then you turn on
the Imlac, which is connected to the Cromemco by a null modem serial
cable.
LOL! Well, I still have my PDS-1D and I am happy that
Bob is interested
enough to get the PDS-1 running. Note, the "D" stands for Dense, as in a
more densely packed set of hardware. In the PDS-1D, they put more logic
into the same physical space.
Aha. That's something I didn't glean from scanning the documentation I
have.
The PDS-1D I
got came with the software and documentation for
boot-strapping it off the serial port. Maybe you can do it that way? If
I can find where I stored this stuff I can lend it to you if it would be
helpful.
When you say "software", what all do you mean? Do you have any additional
software which runs on the Imlac, which I don't have in my collection? This is how I load my machine. I think that Bob has
the serial loader
information as well, and if he does not, the documentation is on Al's
site:
I'm sure the software I have does the same thing, but this guy and his
friends rolled their own because they got their machines surplus when they
were much younger and didn't get much software with it apparently.
When are you going to get your machine running Sellam?
It's on the list-of-things-to-get-to-someday. Right now things are way
too crazy. It's chore enough trying not to fall too far behind right now
:(
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 *
2:21 p.m.
New subject: It lives! Imlac PDS-1, serial #2 is running again.
The guy I got it from wrote his own bootstrapper on a
CP/M machine and
cross-assmebled it to the IMLAC. He wrote all the tools himself. For a
guy that didn't think there would be a problem of storing this thing
outside for 5 years before I got my hands on it, he actually was smart
(once).
The way it works, you load the disk up on the CP/M machine (in this case
it was a Cromemco Z1) and it readies the serial port. Then you turn on
the Imlac, which is connected to the Cromemco by a null modem serial
cable.
Right. What I was actually asking was if the guy gave you any Imlac
programs, you know, the ones which the loader loads into the Imlac?
--tom
This is how I load my machine. I think that Bob
has the serial loader
information as well, and if he does not, the documentation is on Al's
site:
I'm sure the software I have does the same thing, but this guy and his
friends rolled their own because they got their machines surplus when they
were much younger and didn't get much software with it apparently. 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 *
4:47 p.m.
New subject: It lives! Imlac PDS-1, serial #2 is running again.
On Wed, 4 Sep 2002, Tom Uban wrote:
Right. What I was actually asking was if the guy gave
you any Imlac
programs, you know, the ones which the loader loads into the Imlac?
I believe he gave me a whole box but I don't know what he all gave me.
I'll have to dig the box up and see if it's labeled.
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 *
5 Sep
5 Sep
2:44 a.m.
New subject: It lives! Imlac PDS-1, serial #2 is running again.
I'd be interested to see what these people did to support the Imlac.
From a software point, my first concern is going to be getting one of
the older, 4K terminal
programs running.
But if a CP/M cross assembler exists, that would be very interesting.
If it could be run under
some CP/M emulation on a PC, that would be very useful right now.
Sellam Ismail wrote:
On Wed, 4 Sep 2002, Tom Uban wrote:
Right. What I was actually asking was if the guy
gave you any Imlac
programs, you know, the ones which the loader loads into the Imlac?
I believe he gave me a whole box but I don't know what he all gave me.
I'll have to dig the box up and see if it's labeled.
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 *
7 Sep
7 Sep
8:55 a.m.
New subject: It lives! Imlac PDS-1, serial #2 is running again.
On Thu, 5 Sep 2002, Bob Shannon wrote:
I'd be interested to see what these people did to
support the Imlac.
They mostly hacked around with them. I'll have to check through what I
got from them to see what they did.
But if a CP/M cross assembler exists, that would be
very interesting.
If it could be run under some CP/M emulation on a PC, that would be
very useful right now.
It exists, or at least it did at some point. If I can find the stash I'll
let you know what's in it. Unfortunately, I lost the guy's e-mail
address.
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 *
4 Sep
4 Sep
11:07 a.m.
New subject: It lives! Imlac PDS-1, serial #2 is running again.
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11:24 a.m.
New subject: It lives! Imlac PDS-1, serial #2 is running again.
Incidentally, does anyone have/know where to get 74Hxxx
TTL? I'm working
on a machine that's stuffed with it, and a fair number of chips have
failed. 74LSxxx works in most places, but there are some chips (74H52,
74H54 And-Or-Invert gates, 74H108 JK flip-flops, etc) that don't seem to
have equivalents in other families. If one of those has failed (or fails
in the future) I am going to have problems...
A few months back (or was it a year now), I was trying to stock up on
74Hxxx TTL
so that I would have some to repair my old PDP-11s when/if those parts
died. They
are very hard to locate these days. After much web surfing, I located a
place which
used to sell them, but was switching business over to a more lucrative
solar products.
They still had a large inventory of the parts, but couldn't be bothered to
sell me some
(or all) of the 74Hxxx parts that they had on hand. I imagine that they put
them into
a dumpster -- what a shame!
--tom
-tony
1:30 p.m.
New subject: It lives! Imlac PDS-1, serial #2 is running again.
unicorn electronics seems to have the h108's for $1.29
ea.
http://www.unicornelectronics.com
Do 74H chips fail more often than "regular" or LS TTL?
--- Tom Uban <uban(a)ubanproductions.com> wrote:
__________________________________________________
Do You Yahoo!?
Yahoo! Finance - Get real-time stock quotes
http://finance.yahoo.com
Incidentally, does anyone have/know where to get
74Hxxx TTL? I'm working
on a machine that's stuffed with it, and a
fair
number of chips have
failed. 74LSxxx works in most places, but there
are
some chips (74H52,
74H54 And-Or-Invert gates, 74H108 JK flip-flops,
etc) that don't seem to
have equivalents in other families. If one of
those
has failed (or fails
in the future) I am going to have problems...
A few months back (or was it a year now), I was
trying to stock up on
74Hxxx TTL
so that I would have some to repair my old PDP-11s
when/if those parts
died. They
are very hard to locate these days. After much web
surfing, I located a
place which
used to sell them, but was switching business over
to a more lucrative
solar products.
They still had a large inventory of the parts, but
couldn't be bothered to
sell me some
(or all) of the 74Hxxx parts that they had on hand.
I imagine that they put
them into
a dumpster -- what a shame!
--tom
-tony
1:04 p.m.
New subject: It lives! Imlac PDS-1, serial #2 is running again.
On Wed, 4 Sep 2002, Tony Duell wrote:
I have a few National branded 7473 chips in the parts cabinet and can part
with one if needed.
By the way,
during my debugging, I came across a bad 7473. Its a odd
little JK flip flop, and I'd like to find a replacement. Note that
the 74LS73A is NOT compatible, its got a different truth table!
Should anyone have one of these kicking around, please let me know.
I think I might have some -- I found them the other day when looking for
the (much more common) 7474. They are RS components ('Radiospares' to
old hackers in the UK) brand, so no idea if they are true TI 7473s or
not. But if you can't get one in the States, I can see if I can find
them again and then send you one. Incidentally, does anyone have/know where to get
74Hxxx TTL? I'm working
on a machine that's stuffed with it, and a fair number of chips have
failed. 74LSxxx works in most places, but there are some chips (74H52,
74H54 And-Or-Invert gates, 74H108 JK flip-flops, etc) that don't seem to
have equivalents in other families. If one of those has failed (or fails
in the future) I am going to have problems...
I believe 74H stuff was totally dropped from production, so likely the
only sources for it will be old stock, the surplus market, or old parts
hiding in parts cabinets.
-Toth
2:03 p.m.
New subject: It lives! Imlac PDS-1, serial #2 is running again.
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3 Sep
3 Sep
11:20 a.m.
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7923
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ard＠p850ug1.demon.co.uk -
bshannon＠tiac.net -
donm＠cts.com -
doug_jackson＠citadel.com.au -
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foo＠siconic.com -
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stanb＠dial.pipex.com -
tothwolf＠concentric.net -
uban＠ubanproductions.com -
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