I've spent some years on the net searching for info on my latest acquisition
and how to get it functioning. In the mutitude of sites available some provided
useful info on the machine or platform while others simply supplied pictures
of a collection. Sources could lead you to a multitude of sites before you
found the one that answered your questions, if you were lucky.
The problem is the common problem on the net of too much information.
Sellams site is a case in point, and IINM my site-list from T3C served as a
source for his some of his list. The multitude of sites is just too overwhelming.
What would be good is the definitive computer site for each computer or the
catagory you're looking for. Jeff Helliges site for the Tandy 2000
http://www.cchaven.com
Tim Manns TRS80 site
http://www.tim-mann.org/trs80new.html
Kees Travers TRS m.II
http://home.iae.nl/users/pb0aia/cm/modelii.html
Merch's site for the m.100 ( Can't find it in my list.Put it in your sig file Merch)
For the CoCo
http://zeppelin.tzo.cc/coco/coco.jhtml
Tandy 1000 page (can't find it- Red dog page ?)
As examples just for the Tandy boxes.
comprehensive sites like the PCjr one
http://mail.magnaspeed.net/~mbbrutman/PCjr/pcjr.html
or any of the PS/2 Mafia pages and the IBM Can site for most models
It would still comprise a multitude of info but would point you to the best
sources of info on that box you just acquired.
And of course generate a bunch of disagreements on the list as to the
most authoritive site.
Sellams site would likely be the best place to list such a thing as it is well-
known and would likely need only a minimum of re-organisation.
And of course could have various sections for those into micros, minis, and
even mainframes. Rogers site could be a kickoff for Laptops.
The main thing would be that the listing was the authoritive site in the
opinion of the list, and save a collector from tedius Google searches.
Possibly even a rating system could be used.
Lawrence
Reply to: lgwalker(a)mts.net
Love of the Goddess makes the poet go mad
he goes to his death and in death is made wise.
Robert Graves
Can anyone here help me with this. I need to know
the sequence that Intel RAM (SRAM and DRAM) was
introduced. If you think you know dates, give them.
In know that Intel's first RAM was the 3101 SRAM
Then came the 1101 SRAM
I "think" the 1103 DRAM was next.
Then comes... What?
I suspect the 2101? Or was it the 2102? Not sure
which came first.
I think the 2111 and 2112 came after the 2102.
Anyway, if you can help, let me know what order you
think the Intel RAM was introduced.
I've tried figuring this out from the 1977 IC Master but
it list everything up thru the 2114
and does not indicate when the chips were introduced.
Here's the base numbers I'm interested in.
1101
1103
2101
2102
2104
2105
2106
2107
2108
2109
2111
2112
2113
2114
2115
2116
2117
2118
2125
2148
2149
3101
3102
3104
3106
3107
5101
Also, if you know of any early Intel RAM not listed, please
let me know.
As always, I am looking to buy any vintage Intel or Intel
2nd source processors, EPROM's, PROMS's, ROM, RAM,
or support chips you have, that I don't, that you don't need.
In particular, I'm looking for the following:
Intel C1701 EPROM
Intel C1702 EPROM (not C1702A)
Intel C1602 PROM
Intel C1602A PROM
Intel C3101A in white CerDIP package without visible
gray traces.
Intel C2704 EPROM
Intel C8080 (not C8080A)
Eng Samples of Intel 4004 thru 8088 processors.
Toshiba TMP9080AC (8080 clone)
Mitsubishi M58710S (8080 clone)
Early AMD 8080's before AMD started using the AM9080
part numbers.
I've got a pile (seven or eight or maybe more) of Sun VME boards
free for pickup in Austin, TX.
I know one of them is a 4/6x0 memory board (tons of 30pin slots);
i've got a couple of SCSI controllers, some IPI controlelrs, ALM-2
boards, etc.
Just cleaning out the closet.
Must pick up - WILL NOT SHIP, *unless* you have something nifty to
trade (looking for ham radio equipment, etc..)
Bill
--
Bill Bradford
mrbill(a)mrbill.net
Austin, TX
I've got a Sun 2/170 and a 2/120 (one is a big black rackmount
cube-ish enclosure, the other is a deskside tower reminiscent of a
skinny 3/260), free for pickup in Austin, TX.
The /170 will need some cleanup and TLC; the /120 just needs a
monitor cable (9pin mono monitor; an all-wires straight-through
9pin serial cable works fine), keyboard cable, mouse, and mouse pad.
WILL NOT SHIP. You will need to come pick these up.
Bill
--
Bill Bradford
mrbill(a)mrbill.net
Austin, TX
I have the following two boards which I like to dispose of. Free to a good
home, as long as you don't put them up on eBay. Buyer pays shipping, let's
say $5.00 each.
1. Computer Products Model 312 w/cabinet kit. I believe this is a DHV11
clone (dual width, qbus). The cabinet kit has 8 DB25 connectors.
2. Simpact Assocates, Inc. ICP 1622 Comm (quad width, qbus). I have no idea
what this card is, but it does have a socketed DEC 21-17311-01 chip on it
(which I believe is the bus interface.) I imagine that it is a
communications card of some sort.
Both cards are untested and shipped as-is. The ICP 1622 was pulled from a
working system, so I'd guess that it works. The other arrived with a pile of
equipment, so I have no idea about it's status.
Bill
Hi found this funny t-shirt being auctioned on ePay:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2008676061
What I don't quite understand is what message this t-shirt
was supposed to convey, so I just thought may be I should
take it literally. And so I did :-) See here:
http://aurora.regenstrief.org/VAX/open-systems.jpg
regards,
-Gunther
--
Gunther Schadow, M.D., Ph.D. gschadow(a)regenstrief.org
Medical Information Scientist Regenstrief Institute for Health Care
Adjunct Assistant Professor Indiana University School of Medicine
tel:1(317)630-7960 http://aurora.regenstrief.org
Hi, let me share a frightening story with you that I lived
through while my family had naptime.
I decided to try out Isildur's idea of booting Ultrix using
a KA62A processor in the hope that that would be supported
right off the 4.5 boot tape. And I just happened to have one
such T2011 board in a box (taken off a lonely 6310 in a
barn full of bird-poop.) So, I took all 6 KA64As out and
stacked them on some papers that I use to pack most
of my boards (with papers between the boards so they would not
stick together :-).
Put the KA62A in and fired up. A lonely light lit and no
real function was to be observed. I moved all 4 MS65A-DA boards
out too, because I figured that may be a KA62A doesn't know
how to deal with MS65A-DA. I swapped in some of those T2014
that seem to multiply while stored in the box. Anyway, it still
wouldn't work.
The self test progress report shows that the CPU detects no
memory and then it reports that problem explicitly and stops.
The CPU error status lights say hexadecimal C0. I could not
find any table explaining what C0 status code is. It could
be boring (like "no memory found", which I know) or it
could indicate some condition that I could fix, like "backplane
wiring error" :-). I stuffed the whole XMI bus full with those
32 MB cards in the hopes that one would work, but to no
avail. So, perhaps the memory access path in that CPU board
is broken? Is there any rewiring to be done when converting
a 6400 down to a 6200?
Anyway, my daughter came downstairs indicating naptime was
over and so it was time to finish up. KA62A and all MS62A back
in the box and all 6 KA64As and 4 MS65A-DA back into the
bus fired up and all processors were indicating they were
somehow not agreeing who would get to be the primary CPU.
Hit reset and they figured it out. But now they were
bitching about memory and the CPUs showed minuses in the
selftest monitor. Rearranged the CPUs and the memory, still
no good luck. Everything was screwed up! I was afraid I
had killed all my boards by careless handling (I did this
before, may be not with that polyester pullover that might
have sent static sparks, like they do.)
Took all but one CPU out and that did do the self test OK.
But one MS65A board seemed broken. It failed regardless
which slot I put it. Finally I took it all out. Then the
CPUs back in and again it didn't work. I then put CPUs
back one by one powering up each time to see progress.
Slowly, one by one, the number of board which I thought
I had killed reduced down to 1, the memory board. The order
in which I put in the CPUs and the restarting every time
seemed to be important. Then, finally I even found one
configuration of the memory boards where all 4 were detected
and tested fine. Hey I was so scared I had killed half
of my VAX through carelessness. But I didn't. I am quite
confused why it is all so finnicky about the order of
installing the hardware. I won't mess with this machine's
XMI configuration any time soon.
regards
-Gunther
--
Gunther Schadow, M.D., Ph.D. gschadow(a)regenstrief.org
Medical Information Scientist Regenstrief Institute for Health Care
Adjunct Assistant Professor Indiana University School of Medicine
tel:1(317)630-7960 http://aurora.regenstrief.org
Today's brag: a Woz IIgs with 20MB Applied Ingenuity internal HD and 1MB
RAM card. I transferred the hard disk, cover (*smirk*) and RAM card to my
1MB ROM 03 IIgs, and now I have a faux Woz with ROM 03 firmware, a 20MB disk
with 6.0.1 on it and 2MB of RAM. Now all I need is a CPU upgrade and a
good modem ...
The G3 for the PowerBook 1400 also arrived today too and that was almost as
much fun. :-)
--
----------------------------- personal page: http://www.armory.com/~spectre/ --
Cameron Kaiser, Point Loma Nazarene University * ckaiser(a)stockholm.ptloma.edu
-- The fastest way to fold a map is differently. ------------------------------
On Sat, 9 Mar 2002; "Davison, Lee" <Lee.Davison(a)merlincommunications.com>
wrote:
> > As an example, I use to work on some navigational
> > transmitters with power output of a few hundred watts.
> > There was a test jack for sampling the RF output and you
> > hooked a scope to the jack. The gotcha was when you
> > hooked the coax cable to the transmitter first instead of
> > the scope. If you did that, the transmitter went down
> > within seconds.
> This is rot!
No it's not. I know of a couple technicians who goofed and caused
it to happen.
> On a transmitter with even a few watts output the
> RF probe coupling would be -10dB or more, so even an open
> or short on this would give a return of -20dB. This is so
> small it can be ignored, in fact many antenna systems aren't
> that good.
I agree with what you say here, even for the vintage of the
transmitters. They were built in the 40's & 50's. It was
even fascinating to see how the technology worked. To modulate
a portion of the RF with low frequency (ranging from 30 to 90 hz)
there was two RF coupling loops with a specially designed fan
blade spinning between the loops. This changed the amplitude
of the RF coupled from one loop to the other.
You can probably imagine the fascination of some technicians
when we swapped out this vintage tube type monsters with
state-of-the-art-neato solid state units. Got questions from
the some of the old timers 'Duh, it taint got no moving parts, how
does it modulate the carrier?'.
> As a termination a scope is a very poor match for any low Z
> RF source it's impedance being 1Mohm or more so it
> wouldn't matter if you plugged it in or not. Also most test
> gear can't absorb any ammount of watts for any length of
> time, so if the port was a high power snif it would have to be
> terminated at the port with a high power attenuator which
> gives a good match regardless of it's terminating Z.
Because of the vintage of the equipment and operating in the
VHF band (108-118 mhz), we had special scopes that that had
a special RF input section that could handle a few watts. This
was what we used to check the modulation pattens and the like.
> > The open circuit at the other end of the coax got
> > reflected back to the transmitter as a low
> > impedance and detuned it, and the monitoring circuits
> > would detect the detuning and pull the plug.
> This depends entirely on the wavelength length of the
> coax. Did you use an exact odd multiple of 1/4 wavelength
> coax every time?
Yes, it was required for use with the scope.
> can you remember the make/model of these transmitters?
Nope, I have slept since then. They were all special designed for
the government. In fact when they were replaced with solid state
units (1980's), we had orders to destroy the old ones. They did
not want them on the surplus market where they might show up in
operation later.
I do remember now, one model was built by Wurlizter (sp?), yep, the
electronic organ folks.
And now, I would like to apologize to the list. While this meets (and
exceeds greatly) the 10 year guideline, it would not by any stretch of
the imagination 'compute'. I was simply trying to point out the need
for proper termination of a circuit, regardless of where the circuit is
and what it does. Forgive me.
Mike