I'd like to get a rough idea of how many people would be interested in
buying and building a P112 kit at the next west coast VCF. I've been
asked to do a breakout session similar to what was done with the ELF2k and
Replica I of 2006.
--
David Griffith
dgriffi at cs.csubak.edu
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?
I'm not sure if this interests anyone. It sure doesn't interest me, but
maybe someone is looking for one to complete their collection. Have at
it!
Reply-to: Ian Gribble <gribble at manx.net>
---------- Forwarded message ----------
Date: Sun, 21 Jan 2007 15:04:58 -0800 (PST)
From: Ian Gribble <gribble at manx.net>
Subject: IBM PS1
I have an IBM PS1 (says model 2011 on the back of the case ) 10MHz 286
which I am about to throw out, do you guys want it or is disposal the best
thing to do?
***
--
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
[ Old computing resources for business || Buy/Sell/Trade Vintage Computers ]
[ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]
> -----Original Message-----
> From: cctalk-bounces at classiccmp.org
> [mailto:cctalk-bounces at classiccmp.org]On Behalf Of M H Stein
> Sent: Tuesday, January 23, 2007 5:52 PM
> To: 'cctalk at classiccmp.org'
> Subject: Tandon TM848-2 Floppy drive power
> ------------------Original Message:
> Date: Tue, 23 Jan 2007 11:23:32 -0500
> From: "Kelly Leavitt" <kelly at catcorner.org>
> Subject: Tandon TM848-2 Floppy drive power
> To: <cctalk at classiccmp.org>
> Message-ID:
> <07028839E9A3744F87BEF27FF2CFF8E30B1494 at MEOW.catcorner.org>
> Content-Type: text/plain; charset="UTF-8"
>
> The drive in my Tandy Model 6000 has +5, +12 and +24
> connected to it (pins 5, 4, and 1). The schematic in the
> service manual I have shows 4 as NC and a 7812 providing the
> 12v from the 24v line. The specs for the drive in the service
> manual do not mention +12 on pin 4 at all. The scematic at
> bitsavers isn't a lot of help.
>
> I don't have the drive here in front of me. Does anyone have
> one where they can verify the connections from the AMP power
> connector to see if pin 4 actually goes anywhere on theirs?
>
> -----------------Reply:
>
> The drive in front of me corresponds to the service manual, i.e.:
>
> AMP PCB P7
> 1 1 - +24V
> 2 2 - GND
> 3 3 - GND
> 6 4 - GND
> 5 5 - +5V
> 4 NC
OK, I'm home looking at the drive. The wiring harness from the power supply does connect +5, +12, and +24 to the plug that goes into the drive. However the TM848-2 drives have pin 4 vacant on the connector on the drive. That is, there is no pin there. Sounds dangerous, but that is typical of Tandy's shortcuts.
> Hope that's clearer than mud & helps.
>
It is, it does.
> mike
>
Thanks,
Kelly
--
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.1.410 / Virus Database: 268.17.8/649 - Release Date: 1/23/2007
Tony Duell wrote:
OK, let me raise a few points.
I think _everyone_ here could do component-level troubleshooting if they
wanted to. It's mostly a matter of logical reasoning, and I think everone
here can think logically.
This last part may explain why I'm so fanatical about it. I find it fun.
I like solving puzzles. I like logic puzzles particularly. And that's
exactly what rtoubleshooting should be. A puzzle. It's like detective
work. You gather the clues, think about them, and find the cluprit.
Fortunately for me, the rsults of being wrong are somewhat less serious
than sending an innocent man to the gallows ;-)
I guess troubelshooting is one reason that I mess around with old
hardware. I do enjoy it.
-tony
-------------------------------------------------
Tony,
There are different motivations for different people. I don't share your
love of fixing things for the sake of fixing them. After 45 years of
repairing electronic problems for a living, I'd like a break. Puzzles are
fine for minor recreation, but a full time diet is very boring. Broken
malfunctioning computers have gotten old. Time for some fun.
I buy new computers so I can USE them. I want to have pwerful tools to
create, research, edit, post. I buy new TVs so I DON'T have to fix them.
I'd rather watch programs on them. I don't have to prove to myself or
anyone else that I can troubleshoot an old circuit. Or a new one for that
matter.
Same for cars and cameras. My pleasure is in driving someplace I haven't
been and experiencing it. Or visiting friends. Staying home and overhauling
the engine is not a pleasure. Buying a camera to fix it is not a joyous
thing. The creative part is in the picture taking.
So I DON'T agree that everyone on the list should be able to troubleshoot.
It is a minor facet of the hobby of retrocomputing, not the raison d'etre of
the hobby.
Billy
------------------Original Message:
Date: Tue, 23 Jan 2007 11:23:32 -0500
From: "Kelly Leavitt" <kelly at catcorner.org>
Subject: Tandon TM848-2 Floppy drive power
To: <cctalk at classiccmp.org>
Message-ID:
<07028839E9A3744F87BEF27FF2CFF8E30B1494 at MEOW.catcorner.org>
Content-Type: text/plain; charset="UTF-8"
The drive in my Tandy Model 6000 has +5, +12 and +24 connected to it (pins 5, 4, and 1). The schematic in the service manual I have shows 4 as NC and a 7812 providing the 12v from the 24v line. The specs for the drive in the service manual do not mention +12 on pin 4 at all. The scematic at bitsavers isn't a lot of help.
I don't have the drive here in front of me. Does anyone have one where they can verify the connections from the AMP power connector to see if pin 4 actually goes anywhere on theirs?
-----------------Reply:
The drive in front of me corresponds to the service manual, i.e.:
AMP PCB P7
1 1 - +24V
2 2 - GND
3 3 - GND
6 4 - GND
5 5 - +5V
4 NC
However, the schematic & PCB have a jumper position (LV) which
bypasses the 12 V regulator, so presumably there was an option to
omit the LM340T-12, C6 & R1 and connect +12 directly from pin 4 of
the AMP connector to where R1 would be.
Looks like there was also an option (on the schematic, not the drive)
to use pin 4 (and/or pin 3) of the AMP connector to sense when a disk
was inserted and turn power to the drive on/off.
BTW, on the drive the fuse F1 is in the main +24V line, whereas the
schematic shows it only in the branch going to the 12V regulator.
Hope that's clearer than mud & helps.
mike
All,
a while ago was posted here a recommendation for a set of
security bits. I have at least two items that I can't (reversibly)
get into without them - one is a power supply unit for a PowerBook
3400, which needs a tamperproof torx (I think).
What's an affordable (in the Duell sense) set of tools that
anyone can recommend to me? I'm hoping to get tamperproof Torx,
triangle-head, etc. in several different sizes, so I can keep the
whole set together and just grab it when someone assumes I'm about to
kill myself.
--
Mark Tapley, Dwarf Engineer
(I haven't cleared my neighborhood)
210-379-4635 Dwarf Phone, 210-522-6025 Office Phone
Rumor has it that William Donzelli may have mentioned these words:
>>I probably should add one of my big gripes: Torx-plus (5-lobed star)
>>tools.
>
>While I have seen a lot of security heads in use, I have never seen
>anything that actually uses these Torx mutants.
The original Leatherman Wave. Despite the fact IMHO it's the best multitool
on the planet, it *really sucks* when you can't even tighten the joints
yourself!!! Ungh.
My Leatherman Wave of 3+ years just went on walkabout (that's how I've lost
most of them - someone else wanted it worse than me!!!) so I had to
purchase a new one - and now they use "standard" 6-lug Torx security bits.
> Have manufacturers
>been shying away from them? What uses them?
I doubt anything in the computer world uses 'em, and other than my old
Wave, I've never seen them used on anything else. The Leatherman Corp. quit
using them, so maybe the NDA and associated crap was too tightly controlled?
>I would not be suprised if there are already Chinese knockoffs.
Back when I was actively looking for them, I couldn't find one. Haven't
looked in a couple years, tho.
Laterz,
Roger "Merch" Merchberger
--
Roger "Merch" Merchberger -- SysAdmin, Iceberg Computers
_??_ zmerch at 30below.com
(?||?) If at first you don't succeed, nuclear warhead
_)(_ disarmament should *not* be your first career choice.
I can see why you might need 2. Apparently you like to
do everything twice LOL LOL!
--- cctalk-bounces at classiccmp.org
<jthecman at netscape.net> wrote:
> Our museum is looking for one or two of these, where
are they located?
>
>
> -----Original Message-----
> From: overfie at attglobal.net
> To: cctalk at classiccmp.org
> Sent: Mon, 22 Jan 2007 11:00 PM
> Subject: IBM Displaywriter
>
>
> Arthur Gardner
> Gardner Business
> I just read your message of July 21 to Jim Kearney
looking to purchase an
> IBM Displaywriter.
> I am the owner of two IBM Displaywriters w/a shared
printer and desire to
> find a home for them.
> Are you still interested or know of anyone who has
an interest?
> Ralph Overfield
> roverfield at pacbell.net
>
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We won't tell. Get more on shows you hate to love
(and love to hate): Yahoo! TV's Guilty Pleasures list.
http://tv.yahoo.com/collections/265
Suppose the drives were from the Lilith/Eve workstations. Would the
unix trick of using dd still work?
--
nope. they had their own custom drive interface.
same is true for pretty much every disc before SCSI common command set.
while 512 byte block scsi or ide interfaced mass storage devices now
seem like the only things that ever existed, before the mid 80's there
was no real block-level hard disc standard across manufacturers.
the closest would have been hpib, but that was really only used by HP.
