>> Bus transceiver chips for Q-bus and Unibus
> The answer is 7406.
For a very small value of "Q-bus and Unibus"
Read the Unibus Handbook for the reasons why.
Rumor has it that 9000 VAX may have mentioned these words:
>On 1/18/07, Jim Leonard <trixter at oldskool.org> wrote:
>>
>>9000 VAX wrote:
>> > After one hour of surfing the internet, I finally bought 4 IDE-CF
>>adapters
>> > (laptop and desktop versions, $2 each). One for the laptop, one for the
>> > pentium PC linux router, one for the 386 desktop.
>> >
>> > Just want to share the experience with you so you do not need to waste
>> > the 1
>> > hour as I did.
>>
>>Where did you find the IDE-CF adapters? I'm in need of a few myself.
>
>
> From that biggest on-line bazaar that many list members are bashing now for
>its lastest BS.
Ah yes... but if anyone actually *wanted* to support a Classic Computer
company, you could buy them here:
http://www.cloud9tech.com/
Not the cheapest, but hey - they're great guys and can be found over on the
maltedmedia.com CoCo list. At the same time, you could pick up an IDE
interface for your CoCo that has a built-in CF socket right on it...
;-)
Laterz,
Roger "Merch" Merchberger
--
Roger "Merch" Merchberger | "Profile, don't speculate."
SysAdmin, Iceberg Computers | Daniel J. Bernstein
zmerch at 30below.com |
I found your post while searching for an ICE-196PC. Have you sold this
item yet? If not, can you answer a few questions?
Specifically, does the emulator have a flex cable going from the PC
board to the processor pod? Is it gold, with silkscreen 456583-001 (or
-002) TEK INTEL?
If so, I would be interested. Please let me know your asking price.
Regards,
Andrew.
____________________________________________________________________________________
The fish are biting.
Get more visitors on your site using Yahoo! Search Marketing.
http://searchmarketing.yahoo.com/arp/sponsoredsearch_v2.php
>
>
>
> I have thousands of DEC boards, including DZ11's, here if any one needs
> them for replacements or parts.
Thanks, Paul Anderson
In article <e1d20d630701241825v79ce0844h46abf02c3c40596 at mail.gmail.com>,
> "William Donzelli" <wdonzelli at gmail.com> writes:
>
> > Maintaining old DEC stuff would indeed be a niche, so I can understand
> > that. However, someof the things I said still apply. For example, when
> > a DZ11 goes bad, do you actually fix the board (I assume, of course,
> > that you use DZ11s)?. It does not really make sense to, from a
> > business perspective, since good ones are common as dirt and quite
> > available.
>
> Just don't scrap the DZ11s, make them available to people who want to
> scrounge bus transceiver chips from them.
>
> Bus transceiver chips for Q-bus and Unibus are *not* common as dirt
> and more than a few of us have scratched our heads on how to create
> new compatible circuits. Meanwhile, the scroungers taught me that
> it might be easier to scrounge the bus transceiver chips off of dead
> or readily available boards.
> --
> "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download
> <http://www.xmission.com/~legalize/book/download/index.html>
>
> Legalize Adulthood! <http://blogs.xmission.com/legalize/>
>
>
I've been active on classiccmp for a good many years now and up until now
have rather enjoyed making custom and hard to find cables for others in
the classicmp community.
Recently, someone on eBay managed to get their hands on a spool of genuine
DEC flat cord, bought a knock-off MMJ type tool (I saw him purchase it)
and started selling poor quality MMJ cables.
I couldn't compete and quit making standard MMJ cables, but this weekend
he started making H8571-J work-alike adapters to undercut me there too.
I know this person is active on the classiccmp mailing list. He started
listing his cables shortly after my post when I asked which length of MMJ
cables would be the most useful to the majority of the list members.
His eBay id is currently "cheshire-cat-computers" but he had been going by
"ggggmmmm" up until Jan 5th. I've been going in the hole now for 2-3
months with the listings for cables and I think after today I won't be
listing any more. I've now run out of 6-conductor flat cable and I'm down
to less than 2 dozen loose MMJ plugs and I'm thinking that its just not
worth the trouble anymore. I still have some adapter kits that I made up a
few weeks ago, but I think I'm just going to toss them in the junk box and
forget about them. I just have no desire to compete with someone who wants
to undercut me the way he has done as it appears my time is worth a lot
more to me than his is to him.
It was certainly fun while it lasted, and I shipped cables all over the
place, from Australia to Germany to the UK, and of course the USA and got
to talk to all kinds of people. I even had a few go to a couple of people
in the armed forces, so I guess they are still using DEC gear too :)
-Toth
Re: "would it be possible to get a 5.25 to work in say an older laptop w/an
integral 3.5?"
Maybe.
Quite a few Toshiba laptops have an external floppy drive port. It is a
true floppy port, designed to interface to a 34-pin floppy interface. Two
different connectors were used, the "standard" Toshiba floppy port connector
used in every model computer except the Tecra 8000, and a slightly different
connector used in the Tecra 8000 series.
These connectors are found in the Satellite 400 series laptops (two
distinctly different sets of laptops, the "early" 400 series (400 to 435,
Pentium I's) and the "late" 400 series, 440 to 490, Pentium MMX and even a
Pentium II). They are also found in the Tecra 8000 (different connector),
which used both Pentium II and Pentium III CPU (266MHz to about 500MHz). I
think that there are other Toshiba laptops that have a similar connector as
well, in the Tecra and Portege line (and also the libretto models).
Note, since this port was used for the 3.5" floppy drive, you generally
won't be able to have both 3.5" and 5.25" drives installed at the same time
(but, on some of these, the very reason for the port was that there was an
internal drive bay that could either contain the floppy drive internally, or
a CD-ROM drive. Not sure if you could use an internal and an external
floppy concurrently in those models).
Also, Toshiba assumed that the external drive was 3.5" and there is no
provision in the BIOS to configure the bios and software for any other
floppy drive format.
Finally, the hardware reconfiguration (cable) will be a bitch to figure out,
although it is conceptually possible. While the external floppy has the
34-pin electrical interface, mechanically it's not a standard 34-pin IDC
connector, it's a flat "flex cable", and reworking the cable to connect to a
34-pin standard interface will take some effort.
The good news is that you can buy entire laptops in this series for as
little as $15, and you can find the external floppy caddies for $5 (source
of the cable and connector that mates with the laptop).
Date: Wed, 24 Jan 2007 04:56:58 -0500
From: "Kelly Leavitt" <kelly at catcorner.org>
Subject: RE: Tandon TM848-2 Floppy drive power
To: "General Discussion: On-Topic and Off-Topic Posts"
> On Tue, 23 Jan 2007, Kelly Leavitt wrote:
> > 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.
>
> Tandy and Tandon are not THAT close.
>
>
>
The wiring harness is made by Tandy, in the Tandy 6000. That this harness has power going to a drive power plug that isn't used it typical of Tandy's shortcuts. They banked on the fact that Tandon would NEVER put another pin in that socket.
----------------------------------------------------------------------
Well, in all fairness to Tandy...
Since the schematic for the TM848 shows what seems to be an option
to omit the 12V regulator and supply the 12V through the power plug,
perhaps Tandy at one time used (or planned to use) drives requiring 12V
and kept the 12V supply on the connector for compatibility. Wouldn't be
a problem since that pin is physically missing on "normal" drives.
Sorta makes sense; in the S-100 world there generally wasn't a 12V
supply and every drive needed its own regulator(s), whereas if a system
already had a 12V supply then using the 24V and another regulator on
the drive would be redundant and just waste power.
And there are certainly numerous custom versions of the TM848 around,
so you can't count on any particular drive being plug-compatible anyway.
Yes, if you happened to plug a drive with the power off option on pin 4
into your 6000, there probably would be some magic smoke...
Things weren't quite as "standard" in those days as they are today,
FWTW.
m
At 18:30 -0600 1/23/07, Richard wrote:
>Fine. Its shared by two or more people, but its still an opinion and
>not an axiomatically derived fact.
What's an "axiom"?
--
Mark Tapley, Dwarf Engineer
(I haven't cleared my neighborhood)
210-379-4635 Dwarf Phone, 210-522-6025 Office Phone
I *finally* had enough time to write the manual for the UA11 Unibus
Analyzer, so it's now available for sale. Go to
http://www.shiresoft.com/products & http://www.shiresoft.com/docs for
more information.
I now use it almost exclusively for debugging problems and getting
systems to work. I only pull out the 'scope or LA if the problem isn't
observable on the Unibus. (sorry, hopeless plug.)
--
TTFN - Guy
> In many ways, as I watched Lisa Office System and MacWorks boot up (via
> trace logs), I saw many glimpses into the software design ideals and
> practices of the early 80's. I've never been an archaeologist, and
> don't really know that experience, I can guess at the rush and thrill of
> discovery. Seeing the machine code of various Lisa OS's fly by has been
> that experience for me. I could almost understand what the coders that
> wrote them were thinking, how they designed things, and why. I could
> easily tell what code was hand written assembly by an expert, or novice,
> what assembly was generated by compilers.
PLEASE write document the details while this is all fresh in
your mind.
> From: Jules Richardson <julesrichardsonuk at yahoo.co.uk>
> too keen to process it on their own soil. Sooner or later there will
> (thankfully) be pressure on manufacturers to make their products be more
> maintainable and last for longer.
The way things are going, being able to maintain a buggy whip won't be
economically feasible or an asset to any mainstream company. Technology changes,
evolves, and rarely results in something being simpler and easier to fix.
I do like repairing at the component level, but just don't have time for it
right now. But as Tony mentioned, it is a puzzle, and the MINDSET that allows
troubleshooting is just not something everyone has.
One of my favorite examples was back when I was doing field maintenance, I got a
call from a customer who couldn't get their machine to work. So I flew down to
take a look, was picked up by the plant manager, and taken to the machine. While
he went to get the tech, I looked at it and had it working in a couple of
minutes later when they returned. The problem was strictly mechanical (an air
cylinder shaft had come unscrewed from the piston), and they had *assumed* it
was an electrical problem.
And most of us (at least those of us do/did troubleshooting as a job) have had
the experience of troubleshooting equipment where the problem turned out to be
the switch needed to be turned on, or the unit plugged in.
Developing a mental picture (I think in terms of block diagrams) of how
something works is crucial to being able to troubleshoot it.
Sounds like it's a 2011-C34. First Generation IBM PS/1. Uses matching VGA
monitor with CPU power supply inside and DOS in ROM. Kinda cute, and have heard
of some individuals still using them because they're pretty simple. I'd take i
t, but I already have one including the 2121 386 series.
-+-+-+-+-+-+-+-+-+-+-+-+-
In a message dated 1/24/2007 12:18:41 A.M. Eastern Standard Time,
cclist at sydex.com writes:
On 23 Jan 2007 at 17:47, Sellam Ismail wrote:
> 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!
What might make this worth someone's collection is, I seem to recall,
that it is unusual in that it has PC-DOS in ROM.
Cheers,
Chuc
> -----Original Message-----
> From: cctalk-bounces at classiccmp.org
> [mailto:cctalk-bounces at classiccmp.org]On Behalf Of Fred Cisin
> Sent: Tuesday, January 23, 2007 11:22 PM
> To: General Discussion: On-Topic and Off-Topic Posts
> Subject: RE: Tandon TM848-2 Floppy drive power
>
>
> On Tue, 23 Jan 2007, Kelly Leavitt wrote:
> > 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.
>
> Tandy and Tandon are not THAT close.
>
>
>
The wiring harness is made by Tandy, in the Tandy 6000. That this harness has power going to a drive power plug that isn't used it typical of Tandy's shortcuts. They banked on the fact that Tandon would NEVER put another pin in that socket.
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
>
________________________________________________________________________
> Check Out the new free AIM(R) Mail -- 2 GB of
storage and industry-leading spam and email virus
protection.
____________________________________________________________________________________
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.