test-drb

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101090 discussions

by spereira1952＠comcast.net

Here is another scan from a different location: http://www.imsai.net/download/IEEE_696_1983.pdf I hope this may help. smp ----- Original Message -----

10 years, 4 months

dumping Western Digital Microms (PDP-11, WD16, Pascal Microengine)

by jnc＠mercury.lcs.mit.edu

> DEC documentation differs on the location of the two uROM's in the > LSI-11/2 (KD11-HA, M7270): the 'Microcomputer Products Handbook' gives > the order (from the handle end) as KEV11, uROM 1, uROM 0, Control, Data > Path ... > From which I conclude that either: i) one of the documents, perhaps the > Handbook, is wrong, or ii) the 'Control' chip must also be a uROM, and > that there is some variation in how the 3 chips can be plugged in? > Anyone know what's up here? To answer my own post, I looked at the prints (should have done this before I posted, sigh), and there is no way it can be ii). The Control chip has a bunch of discrete signals on pins where the uROM's have micro-instruction bus pins. So there's no way you can swap them around. So the 'Microcomputer Products Handbook' diagram (pg. C-18) has to be wrong. Noel

10 years, 4 months

DEC corporate cab side panel.

by mattislind＠gmail.com

I have one side panel for a DEC corporate cabinet. It should fit VAX-11/780 or similar cabinets. It is in good shape. Anyone need one? It is in Stockholm, Sweden. Also has some other parts for the cabinet, like wheels and other steel parts. /Mattis

10 years, 4 months

KiCad Footprint ??

by gerardcjat＠free.fr

Speaking of KiCad .... Yesterday, I tried for the first time KiCad, and my first board design with it. The very first part I was looking for .... I was not able to locate it. Is it because I am a newbe or because this part does not exist yet, beeing "too old" ?? I was looking for : Card edge connector ( fingers print ) , any contact count, BUT pitch = 3.96 mm Any help ?? Thanks !! --- L'absence de virus dans ce courrier ?lectronique a ?t? v?rifi?e par le logiciel antivirus Avast. https://www.avast.com/antivirus

10 years, 4 months

NCR 376 card punch

by ed＠groenenberg.net

So I saw this NCR376 card punch on the German Ebay and placed a bid, getting it for Eur 1.50 (approx $1.75). Last Saturday I picked it up near Frankfurt and brought it back home and came with a small user manual (in German), 2 sheets of diagrams (need to find a magnifier to read it properly) and about 500 unused cards. There are a few small issues, the rubber rollers of the feeder are melted, but apparently can be replaced using some heat shrink tube, the rubber layer seems to be very thin. Another issue are the transport rollers which moves the card from right to left where the hopper is. Those are also melted but again seem to be repairable. Last issue is that when I press some keys on the keyboard, the card does not advance, only some clicking noises from the backplane is heard. The backplane consists of s series of relays on a few cards, and a number of capacitors on a few other cards. (Yes, this card punch is driven by a series of relays). This unit is OEM-ed from JUKI (Juki-1300), a Japanese company who made it. Although the machine is small (about 100 x 100 x 45 cm) is weights 100Kg. Anybody know a source for other manuals of this machine? Googling for it did not return much for it. Ed -- Ik email, dus ik besta. BTC : 1J5fajt8ptyZ2V1YURj3YJZhe5j3fJVSHN LTC : LP2WuEmYPbpWUBqMFGJfdm7pdHEW7fKvDz

10 years, 4 months

Wood (was Re: IBM Mainframe terminal stuff)

by spacewar＠gmail.com

On Fri, Dec 18, 2015 at 8:27 PM, Fred Cisin <cisin at xenosoft.com> wrote: > Was it the Processor Technology Sol that had oak strips on the sides? Walnut.

10 years, 4 months

scan of IEEE-696 standard

by kspt.tor＠gmail.com

On 20 December 2015 at 07:25, Eric Smith <spacewar at gmail.com> wrote: >> Is this it? (1983) >> http://www.pestingers.net/PDFs/Other_computers/IEEE%20696%20S-100%20Bus%20S… > > That's the one that's been screwed up by OCR. What about this one? Except for the front page and possibly the very beginning, it seems to be the same document, but different. If it's any better I'm not sure about, some pictures didn't do too well in the scan, apparently. http://www.imsai.net/download/IEEE_696_1983.pdf

10 years, 4 months

What did computers without screens do?

by jnc＠mercury.lcs.mit.edu

> From: Mike > The one question I do have for the older gentlemen on here is what in > the world did the computers without a screen to look at do? There are a number of different generations, and the way they were used generally depended on what the computer in question had for I/O capabilities. In the very earliest machines, the computations tended to be mathematical modeling; things that needed a lot of computing, but had very modest I/O requirements. The classic example was the hydrogen bomb calculations performed on ENIAC (which was originally built to do ballistics computations), but other similar ones included structural modeling, etc. That class of application continued (and does so, to this day), but over time, more and more things got done using computers, as their capabilities (online storage, I/O, etc) grew. In general, the new applications were added to the existing ones, but did not supplant the earlier ones. Starting with a computer in England called LEO: https://en.wikipedia.org/wiki/LEO_(computer) they were also applied to business applications (inventory, payroll, billing, etc), which typically did more modest computations, but more I/O, which required better I/O capability (cards, tapes, printers, etc). With the advent of timesharing in the early 1960's, it became common to add individual character-output terminals (initially printing, moving mostly to video terminals circa the mid-70's), and with the ability of users to interact with applications running on a computer, applications broadened even further; online text preparation was one common one. The final phase came with the introduction of bit-mapped video terminals, which allowed the interactive users to use graphics, and images; the very earliest such systems were on time-sharing mainframes, but with the growth of personal computers, that technology migrated there (note that the very earlist PC's had only character-output terminals, mimicing their main-frame big brothers of the time). Noel

10 years, 4 months

scan of IEEE-696 standard

by radiotest＠juno.com

At 03:04 PM 12/20/2015, Eric Smith wrote: >The problem has been solved. Is the solution available online? Dale H. Cook, Roanoke/Lynchburg, VA Osborne 1 / Kaypro 4-84 / Kaypro 1 / Amstrad PPC-640 http://plymouthcolony.net/starcity/radios/index.html

10 years, 4 months

scan of IEEE-696 standard

by spacewar＠gmail.com

Does anyone have a scan of the IEEE-696 (S-100) standard that has NOT been run through OCR to screw up the typography (and even some of the illustrations)? I'm *not* looking for the draft, only the final standard.

10 years, 4 months

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