I don't recall ever seeing mention of this early French computer
before. There's a great deal of photographic and documentary
material here:
http://pichotjm.free.fr/Serel/Summary.html
Cheers,
Chuck
I have a large apple box of about 30-40 official DEC molded cables,
i.e. console and null-modem (db9-db25, db25-db25, db25-centronics),
printer and extension, as well as some non-DEC, a lot of standard power
cords, gender changers, DB25 and DB9 test plugs, also includes three
early manual device switches: 4-way RJ11, 4-way DB25, 6-Way DB25, a few
classic free toys from McDonalds, and an angry nun.
There are also several Avery-Dennison packs of 3.5" floppy disk
stickers for 8.5x11 sheet printers, and there may be a set of 5.25"
stickers.
You pickup.
____________________________________________________________________________________
Don't pick lemons.
See all the new 2007 cars at Yahoo! Autos.
http://autos.yahoo.com/new_cars.html
I'm back from vacation (a wonderful time, except that for a week
in mid-June southern Europe had an amazing heat wave - 43C/109F
during the day in SW Crete, overnight lows around 33C/92F. Rumor
has it that Athens saw nearly 50C/122F!).
I have resumed work on my 8/A - RL02 - OS/8 system that booted
only once (on the second power-up a buffer on the M8315 CPU board
which drove memory address bit 4 failed). I'd previously posted my
adventures finding that 74367.
Anyway having fixed that it still wouldn't boot. The drive would
load and the READY light would illuminate, indicating that track 0
had been located. When flipping the BOOT switch, the head could be
heard to move, then the FAULT light would go on and the boot
loader would hang. I did find that the disk pack had developed a
bad block at octal 100, so I remade the image on a new pack with
no bad blocks. Same error. So I put the pack in the drive that
made it (on my PDP-11/23+) and ran the cable over to the
controller. Still no go.
I keyed in a couple of short programs and couldn't read the
Command Register B properly. Sending one (or a loop of) reset
commands (6600 octal) to the drive did not cause the FAULT light
to go out - only power cycling the RL02 would clear it. That told
me the controller was not communicating with the drive at all.
With a few more test programs and the controller on an extender
card, it was easy to see that the reset command was not being
received, although the IOT 660x signal was. It turned out that the
TP3 signal (required for the reset, among many other functions)
was low in amplitude, barely 2V at the Omnibus pin CH2 (the other
CPU timing pulses TP1,2,4 are well over 3V). The input buffer on
the controller card was not responding to this weak pulse.
Working backwards, I arrived at the source (E27-6 on the M8315
CPU, a 74120 Pulse Synchronizer). There's a pair of these,
E22/E27, driving TP1..4 onto the Omnibus. Nothing obviously fried,
but the other three outputs showed about 750 ohms to ground (on my
Fluke 73) and the defective one was 57 ohms. Before desoldering
the entire chip I confirmed it was defective by lifting pin 6 and
it still had very low resistance.
So the source of the RL02 FAULT is apparently a bad driver chip on
the CPU board. Not where I would have first suspected it. There
may well be yet another bad chip, but one error at a time... now I
have to lay hands on a 74120 before my next 4 week trip away from
home (leaving Sun. 22nd).
Would anyone have one or two 74120's that you could drop in the
mail tomorrow (I'll be happy to pay for the chip and postage), or
point me to a supplier? Neither Mouser, Digikey, Jameco nor Newark
have them :( and Unicorn Electronics has a $20 minimum order.
thanks for any help
-Charles
SGI afficianados,
Please contact the original poster, not me. AFAIK, the equipment is
located in or near Columbus, OH.
---------- Forwarded message ----------
From: Scott Merrill <skippy at skippy.net>
Date: Jul 13, 2007 9:18 AM
Subject: [COLUG] SGI Origin 2000
To: Central OH Linux User Group <colug432 at colug.net>
My former employer is looking to sell their SGI Origin 2000. If anyone
is interested, please contact me off-list.
Silicon Graphics Server
1 Origin 2000 DS 2xR10K195mhz 4
4 CPUs @ 195mhz
XIO to VME Adapter, 6U
2 port Fibre Channel XIO Card
XIO 4 Port 10/100 Ethernet Card
Fiber Channel Vault Array 10 Slot
Irix 6.4.1 OS
1 1000mb Network Card
24x CD-Rom
Fibre Channel Cables
110 VAC Programming Terminal (crt is damaged however machine is operational)
10 18GB Fibre Channel Raid Disks
3 8.8GB FC Raid Disks
2nd FC Raid Vault
1 9GB Root System Disk
768MB ram
Machine is fully functional, Fibre Channel, Raid, 4 port nic and GIGABIT.
$600 OBO for the system above, it is definitely a workhorse!
--
GPG 9CFA4B35 | skippy at skippy.net | http://skippy.net/
_______________________________________________
colug432 mailing list colug432 at colug.nethttp://www.colug.net/mailman/listinfo/colug432
Drifting from TTL homebrew computers into NE-2 relaxation oscillators -
The year Sputnik went up - October 1957 - I built a Sputnik oriented
Christmas tree ornament for my sister.
The "earth" was 3" transparent plastic tube cylinder barely large enough
to hold a selenium rectifier, small electrolytic capacitor,
47K resistors and disk capacitors.
The transparent tube orbit had three support tubes,
and contained the seven NE-2 gas tubes.
I thought it cute but was disappointed that the start-up
and operation was so unpredictable. Direction of rotation
and number of satellites was variable.
But my sister was delighted, and has it to this day -
but it now goes on the tree only when I visit.
Time has been unkind.
The gleaming wires have turned ugly black,
the plastic yellowed, the lamp cord dried and cracked,
and I forget if it still works ... .
> I would be interested in getting some good pictures of one, especially the console.
I just put a bunch of scans up under bitsavers.org/pdf/burroughs/B220/brochure that
should give you a good idea of what the machine looked like.
I just picked up a Bondwell Model 91 today, and have been unable to find any
information about it on the web. A picture of it is at:
http://www.west.net/~marvin/bondwell.jpg
Anyone know anything about it? I am guessing it is part of an early televideo
conferencing system since it has a camera mounted to the top. The "logo" on the
bottom left says BWX compatible.
Just seen on the BBC Web site (http://news.bbc.co.uk/2/hi/technology/6291422.stm):
"Plans are taking shape to set up a museum that celebrates Britain's role in the origins of the digital age.
The National Museum of Computing will be based at Bletchley Park where World War II code breakers built the first recognisably modern computers.
The museum's centrepiece is the rebuilt Colossus computer that broke high-level German communications during WWII.
The museum's founders are seeking funds and backers to exhibit more machines from its extensive collection. " <more>
Bob
I have a couple 3c509b ethernet boards for 16-bit ISA busses. Anyone want
them?
--
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've uploaded some photos from the BCS at 50 event at Bletchley Park today.
http://www.flickr.com/photos/ljw/sets/72157600782178592/
It was a good day with interesting talks from Tony Sale, John Pether and
John Harper. We got to see both the completed Colossus rebuild and the
completed Bombe rebuild operating.
Friday and Saturday the event continues in London.
--
Lawrence Wilkinson lawrence at ljw.me.uk
The IBM 360/30 page http://www.ljw.me.uk/ibm360
Al recently posted a useful manual for collectors. It is called the Fujitsu
Sales Prospector 1986. I say useful because it contains a summary of all
the industry's storage peripheral products available in 1986. Basic specs
and some detailed specs on units. So, for example, if you need to know the
differences between different Rodime hard drive models, that data should be
there.
At the end are several Fujitsu data sheets, on 5.25" and 8" hard drives and
the 243X tape units.
A handy manual for high level data on the state of the industry at that
time.
Billy
Hi all,
I'm looking for the switch settings and/or a service manual to indicate what
the switches on the back of my 5251 do. Anyone have this data?
Thanks
Julian
>
>Subject: Re: TTL homebrew CPUs - OT radio
> From: woodelf <bfranchuk at jetnet.ab.ca>
> Date: Wed, 11 Jul 2007 14:52:31 -0600
> To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org>
>
>Roy J. Tellason wrote:
>
>> Since a lot of parts like UJTs aren't ax commonly available as they used to be
>> I poked around some and found stuff online as to how one might "make" one
>> using a complementary pair of transistors. Couple each base to the other
>> one's collector, and you have an SCR, an SCS, or a PUT, depending on how
>> you wire it up. Not all that much difference between them... :-)
>
>Well I found this surfing last night. Fet + Pnp = Strange radio.
>http://www.schmarder.com/radios/solidstate/homodyne.htm
>
That is a simple DC coupled amp that is used to first amplify RF then
the detected audio is passed through again. The fet is for high input
impedence and the transistor is for increased gain. Other wise know as
a reflex receiver.
Allison
There's just a few more days left until this year's Vintage Computer
Festival / Midwest. So, come and see all of our excellent exhibits put
on by computer collector hobbyists, listen to our speakers talking
about vintage computer topics, and relish in the nostalgia by
buying/selling/trading your own old computer gear at the VCF
Marketplace at the event!
VCF/Midwest 3.0 will be July 14-15, at Purdue University's Stewart
center. Speakers will run from 11a to 2p each day, and exhibits and
the marketplace will be open from 2p to 6p. Admission is $5 per day
for access to the whole event, and kids 17 and under get in for free.
For more details, and to sign up as a last-minute exhbitor or vendor,
please see the official VCF/Midwest 3.0 website at:
http://www.vintage.org/2007/midwest/index.php
If you have any questions, feel free to send me a message at:
vcfmw at computer-refuge.org.
This year's VCF/Midwest is being sponsored by the Rosen Center for
Advanced Computing at Purdue University - http://www.rcac.purdue.edu
Pat
--
Purdue University Research Computing --- http://www.rcac.purdue.edu/
The Computer Refuge --- http://computer-refuge.org
Anyone who's coming to VCF/Midwest and wants to meet up for dinner on
Saturday, drop me a message tonight or early tomorrow. I want to get
an estimate of how many people we're going to have, so I can
potentially make a reservation. So, if you'd be bringing someone with
you, let me know that as well.
Thanks,
Pat
--
Purdue University ITAP/RCAC --- http://www.rcac.purdue.edu/
The Computer Refuge --- http://computer-refuge.org
I stumbled across a very old post you made asking for CP/M disks for a VT-180. Did you ever find them? I know this is a REAL shot in the dark. I can't seem to locate them anywhere. I was able to find all the pieces to upgrade a VT-100 to a VT-180.
I have a Victor 9000 I'm restoring here, and I have a few questions:
1. Where do the two plugs for the 5 1/4 drive heads connect? This system
has the Universal bios, a 10MB winchester HDD with DOS 3.1x and the
later 1.44MB GCR/MFM floppy installed, but I can only seem to get one of
the drive heads working (using catweasel on PC to dump a 'formatted'
disk afterwards results in clear data spikes on one side and the other
side blank, and format.exe won't format disks properly unless given the
/1 1-sides flag)
2. The victor 9000 does NOT say anything when I turn it on. I know the
Sirius 1 did, but I'm not sure the Victor does. Is this normal, or does
the system need the HC-55564 delta modulation chip replaced?
3. Does anyone have a schematic or service manual for the victor
9000/sirius 1 anywhere?
I also discovered that both of the victor keyboards I have need
re-foaming between the contact discs and key plungers, which is gonna be
a whole bunch of fun to do.</sarcasm> They also both need new snap-tabs
on them as both of the tabs have the tooth broken off (though they work
fine other than having to hit keys really hard and the cord occasionally
falling out of the computer)
Jonathan Gevaryahu
jgevaryahu(@t)hotmail(d0t)com
jzg22(@t)drexel(d0t)edu
P.S. Does anyone have dumps of the older BIOSes for the system? The
universal one is the 'last' one of at least three I know existed. More
than one version of the universal one may exist. The one I have is
labeled 'V9000 UNIV. FE F3F7 13DB' and 'V9000 UNIV. FF F3F7 39FE' with
respective crc32s of 25C7A59F and 496C7467 for each ROM. The sum16s
match the last part of the labels, i.e. 13DB and 39FE.
P.P.S. does anyone have documentation for the winchester disk controller
it used? I'm trying to make a raw binary dump of the hard drive,
preserving partition tables, information, etc. and the only way I can
see of doing it is to use BASICA to poke and peek at the proper memory
addresses to make the disk do its thing.
Hmmm - the MT985 likely uses a polled protocol at RS-485 levels. It wants to
hook up to the B1955 Multi-line controller fer instance. You would hang a
bunch of these on a multi-drop line. The Multi-line would throw-out a poll
sequence and get either an ACK or NACK from each terminal on the line. If
the ACK happens, the terminal is then told to send in a block of data.
If memory serves - it has 3 separate micros in it, and the software running on
it was written in Pascal. These came out around 1981-2.
Steve Wilson (worked on the B1955/B1965 design)
>>Being Burroughs, it may be VERY WEIRD. Sort of somewhere between smart
>> (IBM) and dumb (DEC). It will probably only want to talk to a
>> Burroughs.
>
>Hey, I like weird! But yeah...I'm getting the impression from the
>manual this is not an ordinary serial term (though it does have an EIA
>interface.) I don't think it emulates anything, except maybe other
>Burroughs terms.
It has been almost 20 years since I used that stuff, I did work on
Burroughs on mainframe-PC integration and terminal subsystem stuff for
three years, so I should remember some of it, shouldn't I?
Almost no one was using MT-985 when I got there in 86. We all had ET-1100s
and ET-2000s (a Burroughs PC clone that was also a Burroughs terminal). I
don't recall them having any dumb serial terminal capability.
It was a block mode terminal where the mainframe application would send
down the form (a mix of text and formatting codes) in one chunk and the
terminal would display it, then the use would fill in the fields and send
it back to the application in a block when the user hit the transmit key.
Electrically, we always used a two-wire interface (TDI or Two Wire Direct
Interface). I recall that the connector was a DB-25, but only two pins
were used, but that could just be bad memory.
The protocol used to communicate with the terminals was called Poll/Select.
It was half duplex. The terminal processor (can't remember what those were
called in Burroughs-speak) would go through the terminals attached to it
and query them to see if they had anything to send and, if a terminal did,
it would.
Given how hard it is to find info on Burroughs stuff these days, I wish that
had saved more stuff when I left.
alan
Just checked, all of the files on ftp.berklix.com are gone
Bernd Kopriva is on the list, hopefully he mirrored it.
Dumping the boot proms would be a good thing.
I haven't heard anyone discuss this yet: what causes traces on some old
PCBs to wrinkle and not others? My guess is a combination of suboptimal
glue and wide temperature swings.
--
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?
------------------- Original Message:
Date: Tue, 10 Jul 2007 20:47:36 -0500
From: "Jason T" <silent700 at gmail.com>
Subject: Need docs for Burroughs term
I've just picked up an old Burroughs terminal, model# appears to be
MT-985, and I'm having trouble finding documentation for it. It came
with a manual for the ET-1100 model which provides some clues, but the
key sequences to get into the setup for baud rate, etc appear to be
different.
Anyone have any experience with these? It's a cute little terminal
and the keyboard has a key lock on it - never seen that before.
----------------- Reply:
Can't help with the MT-985, but if it's anything like its TD700/800
predecessors it probably had various interface options; the TD's
could be configured for RS-232/BDI async, sync, IBM bisync or
multipoint, and could also have cassette drives, a mag card reader
and/or a printer attached.
In case anyone has one, I do have tech manuals and some parts
for the TD700 & TD800 terminal series.
mike