A few weeks ago, someone sent me the disk images of their
cache of the USUS Software Library, a collection of Pascal code
dating from approximately 1978 to 1981.
They sent volumes 1 through 29 of the US collection and volumes
3 and 4 of the USUS UK collection.
After a few years of casual Web research, I've been unable to find
anyone who'd admit to being the last of the Mohicans who ran this group.
The collection is now online. I'd added a new section to my
Jefferson Computer Museum at <http://www.threedee.com/jcm/>
containing a short description of the USUS user group, the catalog
of the files in the disks I have, and links to downloadable Zip files
containing both .SVOL disk images and plain DOS text files that
should be accessible to today's users.
I improved my UCSD P-System disk tools to handle these .SVOL disk
images. Windows executables of these are online, too. (My RT-11
disk tools were recompiled as result.)
- John
Mike,
Well, it doesn't have too much appeal as just a platter... it would have to
be at least a disk pack, not just a single platter. Of course, the entire
drive would be the best thing.
Will J
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
Tony, quoting I can't remember whom:
>> I once had a Mistubishi monitor which used a 'B'-shell with three coax
>> connectors in it along with eight or nine signals on what looked to be
>> otherwise standard pins. Just yesterday I discarded a badly damaged
>
> There's the 13W3 used on Sun workstations -- 3 coax pins and 10 normal
> pins IIRC. B size shell, I think.
It is indeed a B shell. The pins are numbered 1 to 5 (row at long edge of D), 6
to 10 (row at short edge), A1 A2 and A3 (coaxen), the ordinary pins being
between A1 and A2. Goodness knows why it's sitting on my desk - I don't have a
monitor to fit it (it's an adapter for Sun monitors into VGA cards that came
with our sparcbook at work FWIW)
Also for what it's worth, the Sun connector I have here is a D socket wit coax
plugs embedded in it.
ISTR IBM used an A-size shell with just the 3 coaxen on some of their monitors
(6019 springs to mind).
Dick Erlacher, earlier in the discussion:
> The way I learned it was that the 'D' refers to the shape, the 'B' to the
> shell size, and the number to the maximal pin count. The spacing is not
> .050" however. It seems to me that it's larger than 0.10" andnot less,
> except in the high-density versions like the DE15.
How nice. Two apparently inconsistent answers, both of which are correct!
The spacing between pins along a row is I think 0.1 inches. The spacing between
rows I think is also 0.1 inches. So from a pin in one row to a pin in the other
is around .112 inches, the "larger" spacing that Dick notes.
However, if you move along the length of a D plug, every 0.05 inches there is a
pin, and they line up nicely with 0.05 inch pitch ribbon cable (making the
ribbon cable versions (marginally) easier to make than those for a 0.1" square
matrix connector). And this is what I think our earlier correspondent meant by
0.05 inch spacing.
Philip.
**********************************************************************
This email and any files transmitted with it are confidential and
intended solely for the use of the individual or entity to whom they
are addressed. If you have received this email in error please notify
the system manager.
This footnote also confirms that this email message has been swept
for the presence of computer viruses.
Power Technology Centre, Ratcliffe-on-Soar,
Nottingham, NG11 0EE, UK
Tel: +44 (0)115 936 2000
http://www.powertech.co.uk
**********************************************************************
Because of its size it will be tempting to mount it as the face of a clock,
though. Without the rest of the hardware to make it work (which it probably
didn't to all that well anyway) it isn't that interesting as a museum piece.
It might as well stay where it is.
Dick
-----Original Message-----
From: Chris Kennedy <chris(a)mainecoon.com>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Thursday, December 16, 1999 9:09 AM
Subject: Re: Likely museum piece
>Mike Ford wrote:
>
>> I mentioned it once before, but there is a surplus guy down here in Socal
>> with a 42 inch platter out of a Bryant hard drive hanging on his wall. I
>> suspect not that high of an offer from a formal institution would pry it
>> loose. Isn't this something that belongs in a museum?
>
>
>Bryant disk? Wasn't that the water cooled thing with the platters mounted
>in the vertical plane (that is, 90 degrees to what we're generally used
to)?
>Last time I saw one of those it was being used as a sort of swap drive
>hanging off a customer built channel controller on a CDC6600 at LBL,
>must have been 1976. It was a relic even then.
>
>Seems like the platter belongs almost anywhere else other than on the
>wall of some surplus shop...
>
>--
>Chris Kennedy
>chris(a)mainecoon.com
>http://www.mainecoon.com
>PGP fingerprint: 4E99 10B6 7253 B048 6685 6CBC 55E1 20A3 108D AB97
Contact the sender (g.mitchell(a)COMPUTER.ORG), not me!
------- Forwarded message follows -------
Date sent: Wed, 15 Dec 1999 16:23:11 -0500
Subject: [HP3000-L] HP70 Classic etc available
Organization: RoadRunner Portland, Maine
From: g.mitchell(a)COMPUTER.ORG
To: HP3000-L(a)RAVEN.UTC.EDU
Send reply to: g.mitchell(a)COMPUTER.ORG
Wondered if any of you museum curators/marina operators would be interested
in parts/pieces of an HP-3000 Series 70 we're deinstalling next week? Usual
stuff: 16Meg Kelly card, 4Meg EMC cards, 1 meg HP cards, GIC's, LANIC,
IMBs, ATPs, a disk cabinet (19514A - for 670/7937 disks) and 670XP and
7937XP disks.
--
Glenn A. Mitchell Mailto:g.mitchell@computer.org
3GM Associates, Inc
Portland, ME 04102
207-772-9370
------- End of forwarded message -------
Stan Sieler sieler(a)allegro.com
www.allegro.com/sieler/wanted/index.htmlwww.allegro.com/sieler
OOPS! I missed one . . . one of my pre-Seagate CDC drives does indeed use
220/330 termination resistor packs. It's the only one, as it turns out.
Oddly enough, the MAXTOR, CDC, and Micropolis drives don't care whether the
R-pack is installed or not, but the Miniscribe models won't work without
them.
Dick
-----Original Message-----
From: Don Maslin <donm(a)cts.com>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Wednesday, December 15, 1999 11:42 PM
Subject: Re: An easy one (after that db9 debacle!)
>
>
>On Wed, 15 Dec 1999, Chuck McManis wrote:
>
>> Ok, so my choice of terms was poor, y'all understood what I meant :-)
>>
>> This one should be easy. I've got an ESDI drive, I know that at one time
it
>> had termination resistors in it, I know that I pulled them out, I put
them
>> into my "drawer of misc resistor packs", they are effectively invisible
:-)
>>
>> What is the resistor values for the term pack? 220/330?
>>
>> --Chuck
>
>That is what I have always found/used.
>
> - don
>
>
Ok, so my choice of terms was poor, y'all understood what I meant :-)
This one should be easy. I've got an ESDI drive, I know that at one time it
had termination resistors in it, I know that I pulled them out, I put them
into my "drawer of misc resistor packs", they are effectively invisible :-)
What is the resistor values for the term pack? 220/330?
--Chuck
... and it was a DE9 debacle! . . .
Dick
-----Original Message-----
From: Tony Duell <ard(a)p850ug1.demon.co.uk>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Wednesday, December 15, 1999 7:14 PM
Subject: Re: An easy one (after that db9 debacle!)
>> This one should be easy. I've got an ESDI drive, I know that at one time
it
>> had termination resistors in it, I know that I pulled them out, I put
them
>> into my "drawer of misc resistor packs", they are effectively invisible
:-)
>>
>> What is the resistor values for the term pack? 220/330?
>
>Almost certainly. May be marked 221331 (==22*10^1, 33*10^1). I would
>guess the pinout is one of the standard ones (SIL with the common pins at
>the ends, DIL with the common pins at the top right and bottom left
corners)
>
>The latter assumption is not always valid. I once worked on a floppy
>drive that was corrupting disks. The cause was the termination resistor
>pack. It was a 9 pin SIL, but instead of having the common pin at one end
>(marked by a dot), it had it in the middle. The correct resistor pack was
>symmetrical, therefore. Somebody had put in a normal resistor pack, and
>the result was that all sorts of signals got coupled together. Finding
>that fault was entertaining to say the least.
>
>-tony
>
It appears that most of my ESDI drives, including MAXTOR, Miniscribe,
CDC/Seagate, and Micropolis, all seem to use 150-ohm resistors. I thought I
had at least one around here that used the 220/330 type.
Dick
-----Original Message-----
From: Tony Duell <ard(a)p850ug1.demon.co.uk>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Wednesday, December 15, 1999 7:14 PM
Subject: Re: An easy one (after that db9 debacle!)
>> This one should be easy. I've got an ESDI drive, I know that at one time
it
>> had termination resistors in it, I know that I pulled them out, I put
them
>> into my "drawer of misc resistor packs", they are effectively invisible
:-)
>>
>> What is the resistor values for the term pack? 220/330?
>
>Almost certainly. May be marked 221331 (==22*10^1, 33*10^1). I would
>guess the pinout is one of the standard ones (SIL with the common pins at
>the ends, DIL with the common pins at the top right and bottom left
corners)
>
>The latter assumption is not always valid. I once worked on a floppy
>drive that was corrupting disks. The cause was the termination resistor
>pack. It was a 9 pin SIL, but instead of having the common pin at one end
>(marked by a dot), it had it in the middle. The correct resistor pack was
>symmetrical, therefore. Somebody had put in a normal resistor pack, and
>the result was that all sorts of signals got coupled together. Finding
>that fault was entertaining to say the least.
>
>-tony
>
