Silly question, I know...
I need to create a CD with files on for access by an SGI system. Of
course, the SGI uses a CDROM drive that uses 512 byte blocks. My desktop
PC's the only thing with a CD burner in it, which is naturally set to a
block size of 2048.
>From the point of view of creating a CD, does this matter? Or is the
block size issue only to do with transferring data from the CD unit to
the host, and iso9660 is the same on both platforms?
It's one of those stupid questions that I really don't know the answer
to - I'm used to either just dealing with CDs on a PC, or using original
vendor media on systems which use 512 blocks (such as Sun and SGI)
I've only got a couple of decent branded blank CDs left in the house, or
I'd just risk trashing one and find out for myself :-)
cheers,
Jules
These are the last of my stock of DEC boards. These boards are in
reasonable shape, but perhaps some capacitors, etc will have to be
replaced to get working. I want $15 each + shipping
4 each: M3105 DHU11-A ASYNC MUX DMA CNTL
1 each: M8750-CB MEMORY
1 each: M8750-CP MEMORY
1 each: M7485-YA M7485 W/ BLSTD RMS 4 LYR UDA50
1 each: M7903 BOARD DATA RK06
1 each + 1 damaged: M7819 8 LN DBL BUF ASYNC EIA DZ1
Thanks Norm
I have some firmware chips in a 21MX/E that I can't seem to identify from my
docs, and some I think I know what they are but not sure.
13307-80036, 13307-80037, 13307-80038 I think these are DMI
5090-0589, 5090-0590, 5090-0591 I think these are FPP
92067-80001, 92067-80002, 92067-80003 I think these are EMA (used by RTE?)
93585-80006, 93585-80007, 93585-80008 No clue, may be proprietary ProVOX?
92084-80004, 92084-80005, 92084-80006 No clue, may be proprietary ProVOX?
92084-80007, 92084-80008, 92084-80009 No clue, may be proprietary ProVOX?
Can anyone help and confirm or deny any of this?
Jay West
I have a lot of manuals I want to scan and am trying to decide upon the
best format. I'd like some opinions on the following scans of a 128-page
Franklin AceWriter manual.
On the low end is a pdf of bitmap images. It's hideous, but only 3.5 MB.
The high end is a 40 MB pdf of jpeg images. This one's easy on the eyes,
but is an awfully large download and I'm wondering if it might not print
as nicely as the bitmap.
In the middle is a pdf of compressed jpegs at 15 MB. This looks good to
my eyes, I just wonder about using compressed jpegs for archiving...
<www.applefritter.com/temp/acewriter_lo.pdf> (3.5 MB)
<www.applefritter.com/temp/acewriter_med.pdf> (15 MB)
<www.applefritter.com/temp/acewriter_hi.pdf> (40 MB)
(Disregard the incorrect ordering of the pages.)
Thoughts? Which of the three would you most want to download?
Tom
Applefritter
www.applefritter.com
VCF Gazette
Volume 2, Issue 3
A Newsletter for the Vintage Computer Festival
July 4, 2004
We're busier than we've ever been here at the VCF, so this newsletter
will be short...
Vintage Computer Festival East 2.0
Vintage Computer Festival Europa 5.0 Wrap-Up
VCF Creates PDP-1 Replica for National Science Museum of Japan
Latest Additions to the VCF Archives
Vintage Computer Festival East 2.0
----------------------------------
The second Vintage Computer Festival East takes place on Friday, July
16th and Saturday, July 17th, at Burlington, Massachusetts, campus of
Sun Microsystems.
We are honored to have Sun Microsystems as the sponsor for VCF East!
We've got an excellent line up of speakers and exhibits this time
around, with nearly twice the number of exhibits of VCF East 1.0.
Please note that attendees of VCF East 2.0 must register in advance.
You may register here:
http://www.vintage.org/2004/east/register.php
For out of town guests, the VCF has arranged a hotel room block at a
nearby Marriott (within walking distance to Sun's campus). Full
details are available here:
http://www.vintage.org/2004/east/lodging.php
The VCF speaker schedule is as follows:
Friday, July 16
Time Topic Speaker
------- ------------------------------------- -------------------
10:00am Atari 7800 25th Anniversary C. Vendel/S. Golson
11:00am VCF Ramblings Sellam Ismail
12:00pm Preserving Computing's Past... Bob Supnik
1:00pm A Retrospective of Storage Technology Sun Microsystems
Saturday, July 17
Time Topic Speaker
------- ------------------------------------- ------------------
10:00am A Personal History of Computing Art Hill
11:00am Resurrecting an IBM 360/30 Lawrence Wilkinson
12:00pm PDAs 1973-1992 Evan Koblentz
1:00pm Personal Computing in the early 1970s Jon Titus
More information on the VCF East 2.0 speakers can be found here:
http://www.vintage.org/2004/east/speaker.php
Buy, Sell and Trade at the VCF Marketplace
As always, one of the most exciting aspects of the VCF is the
Marketplace, where you can find a large and varied assortment of some
of the most fantastical old computer thingies anywhere. Find that odd
part you've been seeking out for your collection, then touch, smell,
even taste it if you like, before haggling out a deal. There is
simply no better place to buy and sell vintage computers than at the
VCF Marketplace. Vendor booths are still available. For more
information on selling at VCF East 2.0, please visit:
http://www.vintage.org/2004/east/vendor.php
Complete information about VCF East 2.0, including the speaker
schedule and exhibit roster, as well as lodging information and
driving directions, can be found on the VCF East 2.0 web pages:
http://www.vintage.org/2004/east/
Vintage Computer Festival Europa 5.0 Wrap-Up
--------------------------------------------
VCF Europa 5.0 was a smashing success! We had over 300 attendees and
close to 40 exhibitors. Hans Franke served up another fine glass of
VCF, German style.
We'd hoped to have a photo gallery of VCF Europa ready by the time of
this publishing but the last two months have been rather hectic for
us here at VCF central. Read on below to find out why.
In the meantime, the dates for VCF Europa 6.0 has already been set:
April 30 through May 1, 2005. And of course, the location will be
Muenchen (Munich), Germany, though the venue may change from its
traditional location to a larger facility.
We've added another European event to the VCF line-up: VCF Italia 1.0
will be inaugurated this September 4-5. More information will be
posted shortly to the VCF website.
We'll post our VCF Europa 5.0 photo gallery by the end of July, so
stay tuned for that.
VCF Creates PDP-1 Replica for National Science Museum of Japan
--------------------------------------------------------------
The reason we've been so busy of late is because Sellam Ismail, the
main guy behind the VCF, has been busy finishing up a replica of a
PDP-1 that was commissioned for the National Science Museum of Japan.
The NSM needed a PDP-1 for an upcoming exhibit they are unveiling on
Saturday, July 16. They contacted the Computer History Museum, but
they had none to loan out, so they were forwarded to the VCF since we
have experience building quality replicas of vintage computers. The
NSM wanted a functional replica, and so the VCF delivered.
We fabricated a near exact replica of a PDP-1 CPU cabinet and CRT
desk console. It features a functional front panel and a working CRT
playing Spacewar!
http://www.vintage.org/gallery.php?grouptag=PDP1REPLICA
On the inside we have a PC running Linux with Bob Supnik's PDP-1 SIMH
simulator providing the machine emulation and Phil Budne's graphics
display extensions to allow for Spacewar! to play.
The front panel is implemented with a custom-designed front panel
controller (FPC) designed by Andre' LaMothe of Nurve Networks[1]. The
FPC has 128 outputs (lights) and 64 inputs (switches) and connects to
the PC's parallel port. Code was added to SIMH which sends the
internal PDP-1 CPU machine registers (address bus, program counter,
accumulator, etc.) to the FPC, which then populates the appropriate
lamps on the front panel. The switch values are read by additional
code which then populates internal data structures within SIMH to
allow for user input from the front panel switches.
The replica PDP-1 was crated and sent off to Tokyo on Friday, July 2.
It'll go on display for three months beginning on July 16 at the
National Science Museum in Tokyo. The website of the National Science
Museum of Japan is here:
http://www.kahaku.go.jp/english/
Want your own PDP-1 replica? The VCF will be making available for
sale the Front Panel Controller and PDP-1 front panels. Heck, we'll
even make you a complete replica. Please send inquiries to Sellam
Ismail <sellam(a)vintage.org>.
Latest Additions to the VCF Archives
------------------------------------
This edition of the Latest Additions has a moral at the end, so pay
attention.
A couple weeks ago I was searching around in thrift stores in my local
area for some classic Atari joysticks for a friend's project[1]. At
one store I happened upon a nondescript electronic desk calculator.
However, there was something subtle about it that caught my attention.
I gave it a closer look: it was a Unicom 141P calculator. The label
on the back indicated it was made in Japan. It was definitely a 1970s
vintage. "Unicom" sounded familiar to me. I was trying to remember
the name of the calculator company for which Intel initially designed
the 4004 microprocessor (Busicom) but was drawing a blank. At any
rate, the calculator had a $5 sticker on it, so I figured it was worth
buying so I could research it later, and worst case I would have a
nice 1970s desktop calculator to add to the collection.
Well, imagine my surprise when I opened it up and found a 4004 inside
along with all the Intel 4000 series support chips! Rick Bensene, one
of the most prolific calculator collectors out there, provided me with
this information:
"Unicom was a company that was started up as a spinoff of IC maker
American Microsystems (AMI). There's little out there about the
history of the company in its early days, but it's possible that
Unicom initially started out simply OEMing machines from Busicom,
until they had developed their own chips. Busicom for a time had an
exclusive on the 4004 as the result of their joint effort with Intel
to develop a reconfigurable general purpose calculator chipset, which
ended up morphing into a microprocessor.
"I do know that Busicom did OEM their machines to a number of
different marketers of early electronic calculators, and perhaps
Unicom was one of them. Busicom's machine with the 4004 was the 141PF
(they weren't shy about recycling model numbers, as the 141 was a
lower-cost version of Busicom's first machine, the 162, which was
indeed a discrete transistor machine). The 141PF was a printing only
machine. Looking at patent information, the architecture of the
design was such that it could be adapted (part of the whole idea that
spurred the development of the 4004 in the first place) to use a
display rather than a printer.
"So, my guess (and it's just that at this point) is that the machine
you have is an adaptation of the original 141PF design, done either by
Busicom either on their own, or under contract to Unicom, which was
sold under the Unicom brand name in North America. Later, AMI sold
off the Unicom division to Rockwell, and for a while, Rockwell sold
handheld calculators under this brand, then abandoned the Unicom brand
and sold their machines (using their own chips) under the Rockwell
brand, as well as through other OEMs."
So the moral of the story is, don't judge a gift horse by its mouth :)
Many 1970s era calculators have early microprocessors, so even if you
don't find one with a 4004, it may end up containing an interesting
microprocessor contemporaneous with the 4004, or even an interesting
discrete design. But please don't go trashing old calculators just to
rip the microprocessors out of them.
For more great information on old calculators, visit what I consider
to be the best calculator information site on the web, Rick Bensene's
Old Calculator Web Museum:
http://www.oldcalculatormuseum.com/
[1] Check out Andre' LaMothe's upcoming XGameStation:
http://www.xgamestation.com
That wraps it up for this issue of the VCF Gazette! Until next time...
Best regards,
Sellam Ismail
Producer
Vintage Computer Festival
http://www.vintage.org/
The Vintage Computer Festival is a celebration of computers and their
history. The VCF Gazette goes out to anyone who subscribed to the VCF
mailing list, and is intended to keep those interested in the VCF
informed of the latest VCF events and happenings. The VCF Gazette is
guaranteed to be published in a somewhat irregular manner, though we
will try to maintain a quarterly schedule.
If you would like to be removed from the VCF mailing list, and
therefore not receive any more issues of the VCF Gazette, visit the
following web page:
http://www.vintage.org/remove.php
HAHA ;)
--
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 ]
Hi Tony,
Some 20 years ago I have had to job with the WAND and
created lot of Barcode-Stickers for the Spareparts in
our company. Now I got again the Job to filter those
parts (Usable-Non usable), but somehow someone must have
trown away the software for the Wand.
At my search in the Nert I found your remarks regarding
some application for an HX-20 (long time ago, study's)
Question: Do you still pocess those software and are
you willing/able to share it with me?
Regards from Germany
Jens
--
"Sie haben neue Mails!" - Die GMX Toolbar informiert Sie beim Surfen!
Jetzt aktivieren unter http://www.gmx.net/info
Dan Kolb <dankolb(a)ox.compsoc.net> wrote:
> I decided to power on my MicroVAX 3800, after it's been idling for a couple of
> years (unfortunately due to lack of time on my part), only to find that it's
> not booting properly. The LED display on the cover/patch panel sits saying 'F'
> (apparently "Waiting for CDOK"); nothing else happens. Anyone got any ideas as
> to what may be wrong, or if it's fixable?
First of all, it's DCOK, not "CDOK". Second, the problem may not be in
the CPU board, it may be the PSU. E.g., it's out of tolerance and does
not assert the DCOK signal. Follow Tony's advice: check the PSU voltages
and the state of the DCOK signal before randomly swapping parts (and
certainly before rushing out to eBay to buy a new KA655 board).
MS
Hello Joe & All,
> Message: 6
> Date: Fri, 02 Jul 2004 10:00:01 -0400
> From: "Joe R." <rigdonj(a)cfl.rr.com>
> Subject: HP Omnibook 430
> To: cctalk(a)classiccmp.org
>
> I picked up one of these from a surplus store yesterday. Unfortunately
> soembody removed the system card that contains the special version of
> Windows and some other software from it. Does anyone have an xtra system
> card or the external floppy drive for one of these?
>
> Joe
I have one, but not an extra..:). External floppies are very rare, but
you can better use CF cards to transfer files.
Here you can find everything about omnibooks:
http://24.237.160.4/files/omnibook/
And there is an omnibook mailing list archive somewhere...try
googling on it.
Long time ago there was a thread about dumping the original HP card and
copying it to cf to substitute the missing original..never tryed and
no more memories on this...
--
Best regards,
Denever mailto:denever1@freemail.hu
> If I had to do such a "deliberate trip" today, I'd probably do
> something like plug in an iron and a hair dryer - high-draw devices
> that together exceed the breaker's trip point, but not as drastically
> so as a dead short.
The trouble with that is most non-electronic breakers need 100%
overcurrent to trip in <15 seconds, so it would take five 1500W
hair dryers to trip a 15A circuit.
This makes testing 100A three phase breakers interesting.
Lee.
________________________________________________________________________
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My favorite: (on-topic, but not computer-related)
Car starter motor is really weak, finally just won't turn
over. Lights dim and all when I turn the key. OK, $65 new battery.
Same symptom. Sigh. Well, battery was old anyway. Must be the
starter motor. $75 new starter motor, and some time under the hood.
Same symptom.
Drat! Now who knows what's broken? Start tracing power
wiring, to see what other boxes are in between....after a few minutes
of this, the positive lead from the battery *comes off in my hand*,
leaving the clamp still attached to the battery post.
Doh.
Put cable back into its little cable-side clamp, tighten down
the nuts, problem solved.
The *real* "Doh" is how I managed to change out the battery
and still not notice the loose cable!
----
Then there was the sticktiony hard drive I was trying to get
to spin up one last time by wobbling (about the spin axis) as it
tried to start up, and grabbed by some part that was live. Got maybe
a 12V shock on my finger, fried some part of the drive and that was
the end of that data.
----
Can I count grounding one of the print-head lines on an
inkjet printer with a multi-meter probe and blowing the fuse on the
power brick, or is that just SOP? Hate it when I do that.
--
- Mark
210-522-6025, page 888-733-0967
I did download the pdf before , but upon reading it, I noticed that the manual
was for the unibus version.
--
You downloaded the wrong manual
I double-checked, and SC0351002-J_SC03tech_Nov84.pdf is the Qbus version.
Hi All,
Available are three binders with
PC Support/36 User Guide
PC Support/36 Technical Reference
PC Support/36 Organizer
and some manuals for the 3197 model D terminal.
Thanks,
Fred
Hi all,
In the pile of stuff-to-sort, I found some Honeywell manuals. Is
anyone on here interested?
Cheers,
Fred
--
Fred N. van Kempen, DEC (Digital Equipment Corporation) Collector/Archivist
Visit the VAXlab Project at http://VAXlab.pdp11.nl/
Visit the Archives at http://www.pdp11.nl/
Email: waltje(a)pdp11.nl BUSSUM, THE NETHERLANDS / Mountain View, CA, USA
Over the next ten days or so, I'll be dumping several bits of old
network equipment in the skip at work, and thought I'd see if anyone
here might want any of it. Before you get too excited, some of it
"needs attention", ie is faulty :-)
Firstly, there's a pile (20 or so) of Emulex Performance 4000 32-port
terminal servers. Not sure exactly which model, but I know that all
the ones I have boot over the network (we used DECnet but BOOTP/TFTP
should work just as well if set it up properly). You can get firmware
and other stuff from Emulex's FTP site (I just checked).
Each has 32 MMJ serial ports, a 10base2 BNC, 10base5 AUI, and possibly
a parallel printer port. I can provide a bundle of short MMJ-to-RJ45
cables for each, if required. Unfortunately almost all are "dead".
The common fault is a blown power supply -- they used to die regularly
-- and probably not hard to fix if you have relevant
experience/knowledge. The power supply is a 3-rail 60W circuit board,
not unlike an industry-standard 3" x 5" unit, but slightly larger, so
you might be able to persuade a standard unit to fit (spec is 5V @ 6A,
+12V @ 1.5A, -12V @ 1.0A).
The other pile I'm chucking contains a quantity of 10baseT 3Com FMS II
hubs, some with management units, some without. Most are 24-port but
some are 12-port. There should also be some 3Com PS II 40 hubs, all of
which have on-board management, and all of which are 24-port. All are
19"-rack-mountable, and have a serial port (except the ones without
management). The FMS units can accept one transceiver module in the
back; the PS II 40s can accept two, and we have some spare modules (not
sure what, but probably a few 10base5 AUI ports, one or two 10base2
with BNC connector, and some FOTs (10baseFX Fibre Optic Transceivers
with ST connectors). The older ones aren't very exciting as hubs but
are a useful source of Astec 40W (no, not 60W) 3-rail 3"x5" PSUs.
Lastly, I have an HP LaserJet 5M printer with optional 500-sheet Tray 3
and a 10base2/10baseT/Appletalk network interface, in good condition.
This is the only item I want a monetary contribution for: make me a
(small) offer.
These are PICK UP ONLY -- I haven't time or resource to ship things --
and must go within 10 days. They're "free to a good home" but without
any manuals (unless you're extremely lucky) and with absolutely no
warranty or even guarantee of electrical safety. If you want some of
this stuff, please contact me off-list.
--
Pete Peter Turnbull
Network Manager
University of York
This last weekend just gone I helped a mate sort out the dashboard
wiring in his 'new' ?400 Fiat. This wiring was mostly a mess of short
lengths of twisted together cable and melted adhesive insulting tape
due to many home modifications in its life. I did ask him to get a
service manual that included a circuit diagram but on the day we were
still without and, after the usual disclaimers about working without
docs, I went about fixing what was there.
Not only did I fix the wiring, the dashboard lighting and the clock I
installed a CD player (into the hole where most of the wires had been
hanging from) and a cigarette lighter socket so he could use his in car
charger for his phone. All went well, the dash was re-assembled, the
CD player worked, the phone charged and all the lights lit. Then my
mate got out his cigarettes and pressed the lighter home....
Eventually we realised the noise we could just hear over the somewhat
loud Metallica Black album was the rear screen wiper swishing back and
forth across a dry screen.
Lee.
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>> You did this with high voltage? Shorting out 480VAC by hand with a small
>> cable is a good way to shit your pants at the very least.
> No, only 230VAC.
Someone here - not me - closed an earthing VCB on to the live 11KV board.
That made sure the power was off as it tripped the bus section and both
the remote and local incomer breakers.
Lee.
________________________________________________________________________
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________________________________________________________________________
> There was some discussion not too long ago about cable lacing
> and I recently found a site some of you might be interested in:
> http://www.dairiki.org/hammond/cable-lacing-howto/
Nice descriptions. It's good to know I've been doing it right for
years even though I didn't know the terminology. The last image
on the page is also how we attach silicone water pipes to the brass
fittings in the transmitters. We can't use metal clamps as they get
too hot from the RF and melt the external pipe braid.
It's also the way potato peeler blades are, or used to be, fixed to
the handles.
Lee.
________________________________________________________________________
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service is powered by MessageLabs. For more information on a proactive
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________________________________________________________________________
Hi,
I think this is covered by the 10 year rule, since it concerns pre-windows
stuff.
I am looking for the DOS_SOCK.LIB file. Its a library for developing
programs with sockets, for DOS. I found the following ref in the Microsoft
site:
> MS-DOS TCP/IP for Lanman 2.2c and Microsoft Network Clients 3.0
> support DOS Socket application and WinSock 1.1 application. Sockets.exe
> in MS-DOS TCP/IP is a terminate-and-stay-resident (TSR) program;
> it allows MS-DOS socket applications to run if they've been written
> with the Microsoft TCP/IP Sockets Development Kit Version 1.0, using
> the DOS Socket Library (DOS_SOCK.LIB) available in the Development
> Kit.
I can't find the "Microsoft TCP/IP Sockets Development Kit Version 1.0"
on the Microsoft web site, so I am wondering whether somebody may have
a copy left over.
**vp
Hi All,
Apart from the motorola x86 qbus system, I also picked up a 11/73 in a
BA11-SA
chassis. Apart from having a noisy fan, it starts to the ODT.
On looking at the cards, I noticed it had an emulex controller. I assumed it
woulf be for a mfm disk, But on closer inspection, it appears to be a
SC0310201-BX, Which and is for SMD disks.(emulates RH11,RM02,RM03,RM05, and
RP06. The pdp didn't come with any disks, and I'll probably stick an esdi or
RD disk in it, should I not find a suitable disk :-(
Assuming I can hunt up a disk, I can't seem to locate a manual on bitsavers,
or anywhere. The only manuals I located were for unibus controllers
Anybody out there have a manual they could photocopy/sell., etc
Cheers
Tom
--
---
Please do not read this sig. If you have read this far, please unread back to
the beginning.
And you thought that HP never made wristwatches...
... let alone highly accurate ones! ;-)
http://www.leapsecond.com/pages/atomic-bill/
Laterz,
Roger "Merch" Merchberger
--
Roger "Merch" Merchberger -- sysadmin, Iceberg Computers
zmerch(a)30below.com
What do you do when Life gives you lemons,
and you don't *like* lemonade?????????????
Robert,
I ran across a message of yours from late February of last year
regarding an A&J MicroDrive. Did you ever find any useful information
about it? I don't have one, but I've just started looking. I pulled my
TS 2068 out of the attic last weekend and have been sort of
rediscovering it.
Anyhow, it's good to see that people are still using these old things.
:) I've had my 2068 since I was about 16.
Thanks...
Bryan Vines
bkvines(a)mac.com
On Thu, 1 Jul 2004 00:45:56 +2500 (BST)(!) Tony Duell wrote:
> Actaully I'm more likely to suggest yoy resolder that darn
> dry joint, and
> go over others in the area. Preferably before soemthing in the sense
> circuit goes open and the output jumps to 15V or whatever!
>
> -tony
>
Bad solder joints in power supplies bring back memories... cooked ones...
My Superboard 2 (to be exhibited at VCF East) came without a power supply,
so this intrepid owner got to build his own. Any bad solder joints are the
responsibility of exactly one party...
I kludged a STD-Bus 32K CMOS RAM card (using 16 of 6116 2kx8 parts) onto
the Superboard, and used a free set of 4 size-F NiCad cells as a battery
backup. Size F is used to make the 6-volt lantern batteries, by the way, so
the current capacity of my backup was calculated to keep the board running
without power for roughly 7 years, disregarding internal battery leakage. 7
Amp-hour NiCads can also start a fire in milliseconds: with that in mind, I
placed a service switch in series with the battery so I could take it out of
circuit if I had to fix something. Clever, right?
One day (about 1985) the power supply became intermittent and I had to
dive in to the Superboard's case to identify the problem and correct it.
Awake and alert at the time, I pulled the AC plug, then switched off the
battery. Disassembling the machine, finding the solder joint and
reassembling took me longer than expected, so it was around midnight when I
was ready to power everything back up.
Here's where circuit details caught me: my main charge circuit for the
NiCads was limited to about 5.1 volts - perfect for a 5-volt RAM card.
However, NiCads should have a "trickle" charge of 0.1-1% of capacity to keep
them healthy: for a 7Ah battery, that's 7mA (drawn from a 12-volt supply via
a resistor). This is important, since the RAM card, idle, draws 0.1mA.
Without the battery to absorb the trickle current, the RAM voltage goes
(way) out of spec. (Fortunately, the Superboard had a completely independent
regulator...)
I plug in power, then realize with horror that the battery's out of
circuit and the trickle charge is feeding 12 volts to the RAM. Yank cord.
Check everything out to see what damage was done - couldn't find anything
seriously hurt. Whew.
About 2AM, I plug the cord in again - Moron! The battery's STILL off!
This time I found 2 RAM chips shorted (and snipped the trickle charge
resistor out of circuit). It took me another week to find the last victim,
a 74HC245 bus buffer with its ground bond wire blown internally - no
physical evidence - and CMOS protection diodes on its I/O pins kept the chip
working as long as it had enough logic-0 inputs to work the logic-0 outputs.
When the Superboard READ 0FFh from the RAM board, the '245 starved and I got
errors...
In hindsight, there were so many ways to prevent that...
Bob Maxwell
Hi all,
I decided to power on my MicroVAX 3800, after it's been idling for a couple of
years (unfortunately due to lack of time on my part), only to find that it's
not booting properly. The LED display on the cover/patch panel sits saying 'F'
(apparently "Waiting for CDOK"); nothing else happens. Anyone got any ideas as
to what may be wrong, or if it's fixable?
If not, there's a KA655 on eBay for 20EUR (currently), or 39EUR BIN - is this a
reasonable price?
Dan
--
He who sneezes without a handkerchief takes matters into his own
hands.
I'm looking for the EMS rom for the HP-85A. Or better yet, has any progress
been made in the project to clone the HP programmable rom module?
Jay West
---
[This E-mail scanned for viruses by Declude Virus]
Ok, I'm finally catching up with VCF East planning. Sorry for all the
delays.
The dates for VCF East are July 16-17 (FRIDAY and Saturday). The location
is Burlington, Massachusetts, at Sun Microsystems' corporate campus. Sun
is sponsoring the event.
Those who have already submitted exhibit entries have just been replied
to (Tom Uban: you probably won't get my e-mail due to spam blocks but rest
assured you're in there).
Current exhibitors can be seen on the VCF East 2.0 exhibits page:
http://www.vintage.org/2004/east/exhibit.php
We've got ten exhibitors so far (2 pending approval) which is a good
start, but I'd like to see more. So if you're planning to exhibit at VCF
East, now's the time to register.
I'm also putting together the speaker roster. If you have someone you'd
like to suggest as a speaker, or you'd like to give a talk yourself,
please e-mail me.
Things will start moving fast from this point forward. The next VCF
Gazette will be coming out soon with more information.
Hope to see you all at VCF East 2.0!
--
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 ]
Hi Marvin & Jules
Yep, that is the polymorphic CPU card. The CPU is a 8080 and
the 4 sockets above the CPU are for 2111's. The three sockets
take 2708's. It is missing things like bus buffers. Marvin
or I can get you a schematic. If you get one of the vidio cards
and a parallel keyboard, you can actually do a small amount
( with the 4 2111's as RAM ). The two socket at the upper
right go to a serial buffer card and a cassette interface card.
I do have the schematic for these as well but the cassette has
a couple of chips that may be a real bear to find.
I also have the ROM monitor code and TINY BASIC that will
run on this card.
Dwight
>From: "Marvin Johnston" <marvin(a)rain.org>
>
>
>I *think* this is a Polymorphic CPU card, but I can't get to any of the
>cards right now to make sure. IIRC, IPC was the company name that was
>associated with Polymorphic Systems, and that name appears on most, if
>not all, of their S-100 cards. In checking some of the Polymorphic
>engineering drawings, I.P.C. showed up the one PC Board layout I found.
>
>Jules Richardson wrote:
>>
>> On Thu, 2004-07-01 at 20:16, Jules Richardson wrote:
>> > Random S100 board in the pile. Says "(c)1976 I.P.C" on the underside,
>> > but there's nothing else by way of identification.
>>
>> I've put a small photo up at:
>> http://www.moosenet.demon.co.uk/temp/comps/s100/unknown_s100_sm.jpg
>>
>> any ideas?
>>
>> cheers,
>>
>> Jules
>
In the not too distant future I should be starting my 11/45 restoration
project. In anticipation of that....
My 11/45 front panel has a number of switches that dont work. The normal
failure mode of the switch covers breaking is not the case here. My problem
is the actual switches on the PCA under the switch covers. They have
disintegrated the way I've seen C&K switches do before. I went looking for
C&K switches a long while back for an unrelated project and had trouble
finding them.
I could just locate a whole new front panel, but those get a huge premium on
ebay. I'd just rather find the switches and solder new ones in place. Does
anyone know exactly what switch the 45 uses, and where a source for them
might be?
Thanks in advance,
Jay West
---
[This E-mail scanned for viruses by Declude Virus]
> Next question is, does anyone want it for any homebrew projects?
If it's not already taken, yes please.
Lee.
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Random S100 board in the pile. Says "(c)1976 I.P.C" on the underside,
but there's nothing else by way of identification.
No obvious function for the card, but there's a few empty sockets on the
board though:
1 x 40 pins (CPU?)
4 x 18 pins (memory?)
3 x 24 pins (ROM?)
Any ideas?
ta,
Jules
I picked up one of these from a surplus store yesterday. Unfortunately
soembody removed the system card that contains the special version of
Windows and some other software from it. Does anyone have an xtra system
card or the external floppy drive for one of these?
Joe
looks to be a single board computer that a company did for some type S100 based controller. A CPU, some ram, some rom, I/O and 16 pin dips connectors to send the I/O for testing. The 40 pin chip is probably an 8080 (could be a Z80). My best guess anyway brcause I don't recognize the IPC ID.
best regards, Steve Thatcher
I didn't pick this one up yesterday as I didn't know what chance I stood
of being able to find a home for it.
However, I'll be going back to the site next week I think to rescue some
of the software that was there, and chances are good the printer will
still be there.
If someone wants it and can pick it up from me I'll make sure I grab it.
cheers,
Jules
I'm starting to make progress in going through the carload of stuff I
rescued earlier. For starters:
One of the things I found in the heap was a SWTPC CPU board. I know
nothing about them, but it looked interesting enough to be worth saving
>from an unknown fate.
However, the board's different to the one at:
http://www.computercloset.org/SWTPC6800.htm
This one has 5 larger IC sockets along the top edge, the leftmost of
which is populated. there are two 7805 regulators toward the centre of
the board at the bottom.
Bus is 50 pins, just like the card in the above photo - SW-50 I guess.
There was no sign of a case for the board, backplane, or any other cards
though.
Anyone know what the different board variations are? This one says
"MP-A2" in the top right corner along with a copyright symbol.
Build date looks to be mid-to-late 1977.
On the back, written in pencil, is "MRC original board" (which probably
doesn't mean anything to anyone!)
cheers
Jules
I was just given an A1000 with keyboard, mouse, and the external floppy
(the external floppy seems to have "issues". This is my second A1000, but
the first one is dead and was used for my public displays to show the
signatures on the inside of the case.
I haven't had time to plug it in and see if it boots, but I do know I'll be
needing a Kickstart disk. I have the version of Workbench that came with
my A500 (1.2, I think?) -- will that boot the 1000?
Nice little bonus -- it also came with the genlock slab, so I'll eventually try to
play with that.
Also, anyone have a copy of the bouncing ball demo I can have? I've never
had that, and always wanted a copy, especially since I interviewed RJ Mical
several years back and talked to him about it (he's the one who wrote it.)
While I'm in the process of purging most of my collection (those of you who
have emailed me -- I haven't forgotten you. Life just got nutty for a while
and I got behind on a lot of projects.) I'm keeping my 128K Mac and all my
Amigas (2 - 500's, A1000, and an A2000).
Thanks.
Paul Braun
Cygnus Productions
nerdware(a)ctgonline.org
"Enjoy every sandwich." -- Warren Zevon
"At Microsoft, Quality is Job, oh, I dunno, maybe 7 or 8?"
I'm playing with KLH-10 right now, and would like to run some GIGI-aware
apps that are in the tops20:<games> dir. Does anyone have any recommendations
for a GIGI-emulator app under Linux?
-ethan
--
Ethan Dicks, A-130-S Current South Pole Weather at 02-Jul-2004 03:50 Z
South Pole Station
PSC 468 Box 400 Temp -95.5 F (-70.9 C) Windchill -135.3 F (-93 C)
APO AP 96598 Wind 9.1 kts Grid 084 Barometer 672 mb (10929. ft)
Ethan.Dicks(a)amanda.spole.gov http://penguincentral.com/penguincentral.html
I need a datasheet for a 5204 EPROM (I'll settle for a pinout if no one has
a complete data sheet).
This is 512 bytes x 8, it's essentially half of a 2708.
Now for a big question, does anyone know if it can be programmed in a
Cromemco Bytesaver II ??? The Bytesaver II board was for 2708's; the early
documentation for the original Bytesaver (not the "II") suggested that the
original Bytesaver could program 2704's also (same size as a 5204), but
never went into a discussion of how to do it (the sockets assume 1k 2708's),
and those references are dropped from the Bytesaver II manual.
Thanks.
philpem(a)dsl.pipex.com stated:
>Drat. Apparently the cabling for the data lines is
>nichrome. Whether
>that's
>for mechanical, reliability or electrical reasons I
>have no idea.
>Later.
The only reason I can think of for nichrome is that
there would be a uniform resistance in the wire
(likely) or (unlikely) nichrome is a poor (for a
metal) conductor of heat.
My Tek 1230 is definitely plain old IDC, and that
model is worth up to and including nothing without the
probes. Probes are $400+ (without the grabbers!). I
have 3 and have turned down an offer for $300 for one
of them.
I spoke with a surplus test equipment supplier and he
told me that these are almost always lost when they go
up for auction, especially military. Off lease, they
just bill the customer and dump them surplus anyway.
I actually looked into building a probe - no
schematics, no info from TEK, custom and proprietary
IC's, and I suspect absolute analog comparator voodoo
designed for clean and fast risetimes.
Bottom line: you need to get your dough back. Accept
no less.
=====
-Steve Loboyko
Incredible wisdom actually found in a commerical fortune cookie:
"When small men cast long shadows, then it is very late in the day."
Website: http://juliepalooza.8m.com/sl
__________________________________
Do you Yahoo!?
Yahoo! Mail Address AutoComplete - You start. We finish.
http://promotions.yahoo.com/new_mail
Next oddball find:
A board (about the size of a full-length ISA card) labelled as:
"A2000 Prototype Card V1.1",
"Interface Megavision / Megalink",
"c+p 1988 by SANG Computersysteme GmbH"
Bus is 100 pins (50 each side of the board). There's a handful of buffer
and PAL chips right by the bus connector, but otherwise it's a blank
prototype card. There's a ten pin IDC board-mounted socket in the
bottom-right corner.
Any ideas what / where / why / when? :-)
cheers,
Jules
>From: "Barry Watzman" <Watzman(a)neo.rr.com>
>
>I need a datasheet for a 5204 EPROM (I'll settle for a pinout if no one has
>a complete data sheet).
>
>This is 512 bytes x 8, it's essentially half of a 2708.
>
>Now for a big question, does anyone know if it can be programmed in a
>Cromemco Bytesaver II ??? The Bytesaver II board was for 2708's; the early
>documentation for the original Bytesaver (not the "II") suggested that the
>original Bytesaver could program 2704's also (same size as a 5204), but
>never went into a discussion of how to do it (the sockets assume 1k 2708's),
>and those references are dropped from the Bytesaver II manual.
>
>Thanks.
Hi
I'm not at all sure about programming the 5204 or if it even
is pin compatible with the 2708. The 2704 is program and
pin compatible with the 2708. You just program 1/2 the
address space. The algorithm is the same for both the
2708 and the 2704, otherwise.
Dwight
vaxstation newbie question:
How hard is it to find vaxstation 3100 memory?
I'm finding the 4mb on-board memory is a little, eh - small - for my
needs. Seems like there are 4 "tower headers" on the motherboard which
will allow me to add some more...
Is that memory hard to find? Anyone have any lying around?
-brad
About 10 years ago I attempted to ship some donated medical equipment
>from Kansas City to China for one of our visiting Chinese doctors.
There were brand new but expired medical supplies, needles and
catheters, no chemicals. I used a very sturdy computer monitor box and
packed the entire box full. There was no extra packing just the
packaging the supplies were enclosed in. Well taped and sent express
mail.
First attempt hit US customs in California and was returned because I
shouldn't ship "medical waste" via mail. I made the mistake of
declaring the stuff to be medical scrap, since we were going to trash
it.
I then declared the items to be sterile, stainless steel and plastic,
unused and resent them. They returned in about a week because I hadn't
declared an itemized list of all items enclosed. I then opened the box
and counted every one of the sterile needles, syringes, catheters and
made a total list which was attached to the paperwork. There were over
1,000 items in the box. I still left the value at $0.
The box came back again from California since who would pay over $100
shipping on worthless items. I was mad then. I called up UPS and sent
it airfreight express and it went through without a hitch. The doctor
on the other end ended up paying over $200 in duty since there were so
many items and they must each be worth a least $1.
I think the transport brokers have a lock on the "inside track" which
makes shipping easier.
I was also going to send a complete set of medical journals but I was
tired of the hassle.
Mike
I am about to toss a couple of non-working HP LaserJet IIP printers.
Does anyone need IIP parts like the paper tray, fusor, memory card,
etc?
--
Paul
Monroe, Michigan USA
The manual for the OP-80 paper tape reader is available for download on the
internet at no cost, and has been for some time (years), from multiple
sources. It's on Howard's site, however, which may be the quickest and
easiest way to get it. These are surprisingly valuable, on a few occasions
they have gone for over $100 on E-Bay, although $40-$70 is probably more
common (that's for the reader itself, of course, not simply the manual).
Hello list,
Anybody has the manuals (tif/pdf) or software (RX50 images) for the DEC Rainbow 100?
Al(a)bitsavers.org doesn't seem to have anything on the Rainbow...
Thanks.
/wai-sun
--
___________________________________________________________
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Well, I guess I'm committed! [[ Or... I should be committed! ;-) ]]
I just made the reservations for Boston - I'll be there from Thursday the
15th thru Monday morning, so I plan on taking a long weekend to do some
sightseeing...
... I reserved at the Mariott, and the $69/nite "pay in advance" rate is
for anytime - that's not the VCF Special Rate, so if you're like me & want
to make it a longer weekend, I'd recommend taking advantage of that rate.
The wife wants to spend a day in Salem, and I wanna tour the Sam Adams
brewery... hehehe ;-)
Just thought I'd give y'all the newz...
Laterz,
Roger "Merch" Merchberger
--
Roger "Merch" Merchberger | JC: "Like those people in Celeronville!"
sysadmin, Iceberg Computers | Me: "Don't you mean Silicon Valley???"
zmerch(a)30below.com | JC: "Yea, that's the place!"
| JC == Jeremy Christian
So, I'm acquiring some DECserver 550's, and as I'd actually like to use
them as terminal/console servers, I need the pinout for the harmonica
block that would normally go on the end of the cable for these. I
don't seem to be able to find any documentation on pinout for them
using Google.
Any help is appreciated. :)
Pat
--
Purdue University ITAP/RCS --- http://www.itap.purdue.edu/rcs/
The Computer Refuge --- http://computer-refuge.org