Anyone have any pictures, datasheets, or other ephemera related to Sequoia
Systems line of fault tolerant systems?
This is unrelated to the "IBM Sequoia". The Sequoia computers I'm referring
to were around roughly '86+ish maybe and were fairly large minicomputers.
Their claim to fame was being "massively fault tolerant". I am not sure, but
Ian Sandler may have worked there on that design before heading to General
Automation perhaps, not sure I have my history right.
What I do recall for sure, is I worked on a lot of programming on the
Sequoia systems (the ones I used ran Pick or one of the MVRDBMS's) at Eagle
Snacks (back when that was part of the Anheuser-Busch family). On a whim I
decided to google and while I can find a few white papers on the Sequoia
Fault Tolerance design, I see no marketing brochures, datasheets, pictures,
etc.
I do recall a story from back when I worked there. the head of eagle snacks
was called into the office of the VP of AB for a dressing down, because all
the other departments submitted downtime reports to him on their systems and
Eagle Snacks (running on the Sequoia) did not submit any reports for over a
year. When asked why he wasn't submitting downtime reports the eagle snacks
guy replied "because we haven't had any". The VP said - yes, but I see here
maintenance logs that you had cpu boards failed and replaced, memory boards
failed and replaced, "etc etc". and the ES guy said "Right. No downtime".
Anyone remember these systems?
Best,
J
One of the photos of the PDP 8/A 400 came from this Herb Johnson page,
which is a diary of what I'm going to be doing after I true up the card
cage.
Excellent looking diary of what to check with the unit I have. Hopefully
with less drama and more things checking out.
http://www.retrotechnology.com/restore/8a_repairs.html
thanks
Jim
Not a lot is said about early use of microprocessors in industrial
microcomputers. Everything you read about is so home computing oriented,
but I believe actual sales would have been greater in the industrial space
1974-77.
I compiled a quick thread on my site about the earliest use of
microprocessors in industrial microcomputers on my web site with links to a
related article from EDN Microprocessor Design Series Volume II and scans
of Process Computer Systems product brochures. PCS was a pioneer in
industrial micro-computing.
If anyone has info to share / correct please let me know and I will add to
the thread.
http://vintagecomputer.net/browse_thread.cfm?id=631
--
@ BillDeg:
Web: vintagecomputer.net
Twitter: @billdeg <https://twitter.com/billdeg>
Youtube: @billdeg <https://www.youtube.com/user/billdeg>
Unauthorized Bio <http://www.vintagecomputer.net/readme.cfm>
I need a 90 mm summacron for my m2 (drop me a line off list if anyone
has one)
Yes I know the 105 f 2.5 nikkor you speak of great sharp portrait
length lens for the nikon F!
we have a small 105 mm red dot Goertz we used for copy work on 2 1/4
x 3 1/4 in compur shutter
the one on the Robertson process camera I used in the 70s was 18 inch
focal length as I remember.
Ed#
In a message dated 3/9/2016 6:53:06 P.M. US Mountain Standard Time,
healyzh at aracnet.com writes:
> On Mar 9, 2016, at 5:25 PM, Fred Cisin <cisin at xenosoft.com> wrote:
>
>>> posters! The lens was a Goerz Red Dot Artar and the sharpest flat
field lens
> On Wed, 9 Mar 2016, Rod Smallwood wrote:
>> Thanks,,
>> Our cam was fitted with a high grade Ziess lens that cost a fortune
even then,
>
> Zeiss made a lot of lenses, some of which were great.
> Goerz made a few of the greatest lenses ever made.
>
> For personal use, I'm looking for Leitz Summicron in all focal lengths,
and Nikkor 105mm that was made in mid 1960s.
> And, if I can ever get a 4x5 digital back, I want a Goerz Dagor.
> All out of my price range.
Personally I need a nice ASPH 28mm or 35mm Summicron. I have the original
Nikkon 35mm f/2, one of the very first made, it?s been Ai?d, and it?s an
AMAZING lens.
The Goerz Dagor?s are actually pretty cheap at the moment, I?ve been
thinking about them for my 8x10. I?m using a mixture of modern lenses on my
4x5.
Somehow I don?t ever expect a digital 4x5 back to be affordable. I know
one Photographer that has one, and it?s really only useable for reproduction
work, in the studio. Keep in mind that digital backs that can cover 4x5
or larger are scanning backs. Have you considered adapting a scanner as
one? I?ve seen in the past where folks have done that. Personally except for
one project, I shoot B&W film when I?m shooting 4x5 or 8x10, I then
process and print it myself. For the 8x10 (and hopefully eventually 11x14), I
only shoot B&W, and only contact print.
Zane
Hello!
We are considering (haven't decided 100% yet) to not keep the Q1 Lite
system we have.
Here are some pictures:
https://drive.google.com/folderview?id=0B-rp4vyPPYu1d2pRTVM5TmM0UEU&usp=sha…
It is a 8080 system with PL/1 built into to ROMs. Vintage 1975-76.It has a
plasma screen and comes with an orange desk with built in quad floppy drive
and also a daisy wheel printer.
There are also two big hard drives and a hard drive controller.
Is there interest? Trade for something interesting.
/Mattis
I've got a PDP8/A chassis which has a card cage that has been tweaked
off in the front just a hair. Enough that you can't get the cards in by
an interference amount of clearance.
Anyone have any idea on how they handled this? I'm thinking of using
some blocking and then a 36 or 48" pipe clamp to apply diagonal
persuasion to get it back in true.
The rear of the box is not impacted.
In the body shop trade this is called "diamond" and usually gets your
car totaled if your frame has that damage term applied to the chassis.
I don't see any other damage other than this, no chip damage or cracking
to the back plane, which is of course brittle. The rear dimension of
the chassis is good, and I can't see what caused this. Could have been a
drop, or could have been under too many layers of crap and was tweaked.
Other clever ways to apply very gentle but forceful pressure to true up
the cabinet is appreciated. Also how much to go past square to account
for the "spring" back of the steel once the force is removed would be
nice too.
Thanks
Jim
Hi,
Over the weekend I was looking through some old CAD files and came across my
original design for the MEM11A. It was an SPC board that contained only 128KW
of FRAM.
I?m wondering if there?s any interest in that board. I do have to iterate on the design
a bit but I should be able to get something ready sooner than with my current board
design (plus I know it will fit in an SPC form factor because I?ve already done it).
What I?d like to know from folks is if there?s interest in that design? Would there still
be interest in what I?m now calling UMF11 (Unibus Multi-Function)?
I won?t have pricing (on either) until I build (and debug) a couple of prototypes because
I need to know what the assembly costs would be (no I won?t be offering kits).
To also answer the other question, no I haven?t run into any issues with the UMF11,
I just came across this long forgotten design and wanted to know if there?s any
interest in it as I can probably get it into ?production? sooner than the UMF11.
Thanks.
TTFN - Guy
I will have to try this...
a great undertaking Dave!
Ed# _www.smecc.org_ (http://www.smecc.org)
In a message dated 3/8/2016 6:29:11 A.M. US Mountain Standard Time,
jwest at classiccmp.org writes:
Awesome Dave! Can't wait to test drive it. A very sincere Thank You for all
the time & effort you've spent on that.
Best,
J
I am pleased to announce the release of a simulator for the HP 3000 Series
III computer system. It is available from the Computer History Simulation
Project (SIMH) site:
https://github.com/simh/simh
The simulator runs the MPE-V/R operating system, supports a selection of
simulated disc and tape drives, and accommodates up to sixteen concurrent
users. A software kit containing a disc image with MPE preinstalled is
available as described in the release notes that accompany the simulator.
I would like to thank Frank McConnell and Al Kossow for their invaluable
help in answering questions and supplying documentation for the HP 3000.
-- Dave
