test-drb September 2016

test-drb@ccmp.vtda.org

162 participants
227 discussions

by aek＠bitsavers.org

I picked up a 700/60, the ANSI version of the HP 700-series terminal and when I took it apart to clean, it had a VDC 1401DP31BE inside. I swapped the CRT into a 700/92 which has a slightly different board, and a burned in amber tube, and it worked fine. Also I noticed the 700/96 PCB is almost identical to the 700/60, so I'll try a rom swap to see what happens. Too bad there aren't generally available cross reference list for terminal CRTs. FWIW, the 700/96 has a Philips M32ECD3G CRT. VDC is having a "sale" on the 1401DP4 and P31. The tube price is pretty cheap but the shipping is about double when you price it against their normal $55 price. The shipping goes down with quantity, so if you buy 5 or so it ends up being about $25 a tube and significantly cheaper than all of the ones listed on eBay.

8 years, 2 months

FYI- Department of Defense Debuts Vannevar Bush Faculty Fellowship, Research Gra

by COURYHOUSE＠aol.com

Department of Defense Debuts Vannevar Bush Faculty Fellowship, Research Grant Now Accepting Proposals The Department of Defense (DoD) has announced a new competition for the "Vannevar Bush Faculty Fellowship" in a recent Funding Opportunity Announcement (FOA) (N00014-16-R-FO12) on www.grants.gov. This program is formerly known as the National Security Science and Engineering Faculty Fellowship (NSSEFF), and both program names will be used for this round of competition during the transition phase. The Vannevar Bush Faculty Fellowship program is sponsored by the Basic Research Office, Office of Assistant Secretary of Defense for Research and Engineering (ASD(R&E)). The Office of Naval Research (ONR) executes the program for ASD(R&E) and is soliciting proposals. This program seeks outstanding researchers to propose basic research that is potentially transformative in topics areas of interest to the DoD. ?I strongly believe DoD faces some of the most exciting and difficult problems to be found in research and technology,? said Secretary of Defense Ash Carter. ?Vannevar Bush fellows will lead the way in transforming and defining new fields of science and in helping the Department look to the future. ? This new program name commemorates Dr. Vannevar Bush (1890-1974). He was the Director of Scientific Research and Development during World War II and the author of "Science, The Endless Frontier.? Bush was also a professor and Dean of Engineering at MIT and later founded a large defense and electronics company. As a devoted teacher, administrator and entrepreneur, Bush made creative and innovative contributions to science, engineering and the nation. During World War II, Bush mobilized America?s scientific resources to achieve advances in defense technologies that were decisive in winning the war. After the war, he was instrumental in formulating sound policies for the advancement of science, engineering and education. Bush, in his famous 1945 report, "Science: The Endless Frontier,? wrote that ?the pioneer spirit is still vigorous within this nation. Science offers a largely unexplored hinterland for the pioneer who has the tools for his task. The rewards of such exploration both for the nation and the individual are great. Scientific progress is one essential key to our security as a nation, to our better health, to more jobs, to a higher standard of living, and to our cultural progress." For more information on how to apply, please visit _http://www.acq.osd.mil/rd/basic_research/program_info/vbff.html_ (http://links.govdelivery.com/track?type =click&enid=ZWFzPTEmbWFpbGluZ2lkPTIwMTYwOTI2LjY0MjI4NDExJm1lc3NhZ2VpZD1NREItUFJELUJVTC0yMDE2MDkyNi42NDIyODQxMSZkY XRhYmFzZWlkPTEwMDEmc2VyaWFsPTE3MzUwOTI3JmVtYWlsaWQ9Y291cnlob3VzZUBhb2wuY29tJ nVzZXJpZD1jb3VyeWhvdXNlQGFvbC5jb20mZmw9JmV4dHJhPU11bHRpdmFyaWF0ZUlkPSYmJg==& &&101&&&http://www.acq.osd.mil/rd/basic_research/program_info/vbff.html?sour ce=GovDelivery) .

8 years, 2 months

68K Macs with MacOS 7.5 still in production use...

by jnc＠mercury.lcs.mit.edu

> From: Chuck Guzis > Call it anything you want, but we know what Motorola called it. The _first implementation_ may have been 16-bit, but I am in no doubt whatsover (having written a lot of assembler code for the 68K family) that the _architecture_ was 32-bit: - 32-bit registers - many operations (arithmetical, logical, etc) defined for that length - 32-bit addresses Etc, etc, etc, etc. Noel

8 years, 2 months

UMR computer photos

by jwsmail＠jwsss.com

I was looking thru one of the yearbooks from my time at University of Missouri, Rolla. I found what I think is a photo of a GE-200. I "liberated" this system or one of them to a lab I had, when they were mothballed, and I could swear that is what the systems were. If anyone recognizes them, let me know. This is the first hint of any sort as to what I had. And my memory could be wrong. The square indicator and switch style is very much like what I recall for this particular system. I had gotten handed a couple of very heavy trays of Lambda power supplies which clearly were for some purpose due to how they were mounted. I later found the system I think was a GE-200 neglected in a stockroom in the EE building and recognized that the interconnnect would fit the power supply trays I had. The system was transistorized, not IC I might add. That was why it took 4 or 5 large Lambda supplies. Luckily we had not broken the supply tray up and i was able to play with it. The other thing i think might be of interest are several photos of an analog computer that the EE dept had. I know there was another much larger system in the Physics department as well, and maybe I'll luck out and find a photo of it later. Oh, and the blond at the keypunch. I might add that she is probably retired now. thanks Jim http://s1101.photobucket.com/user/jws1971/library/UMR%20computer%20photos

8 years, 2 months

No subject

by lproven＠gmail.com

"Fan belts only exist, briefly, in the intervals between stars Reviewing the informative Turing?s Cathedral Programming the ENIAC, the world's first digital computer (US Army photo) Book review It's a full four years since it was published, but Reg contributor Geoffrey G Rochat has finally gotten around to reading George Dyson's worthy tome Turing?s Cathedral. He finds it's not just a Best Book list lurker, but something actually worth reading." http://www.theregister.co.uk/2016/01/10/turing_cathedral_fan_belts_exist_br… Contains some discussion of level-based versus pulse-based logic in early valve computers which is frankly way over my head but might be of interest to some here. -- Liam Proven ? Profile: http://lproven.livejournal.com/profile Email: lproven at cix.co.uk ? GMail/G+/Twitter/Flickr/Facebook: lproven MSN: lproven at hotmail.com ? Skype/AIM/Yahoo/LinkedIn: liamproven Cell/Mobiles: +44 7939-087884 (UK) ? +420 702 829 053 (?R)

8 years, 2 months

Fixing HP 3000 model 37 PSU

by hp-fix＠xs4all.nl

Some time ago I acquired a HP 3000/37 micro, it has a faulty psu. One of the mosfet controlling the power transistor BUX48 was shorted an blew up the whole power stage. Getting new fet's and power transistor wasn't the problem, but the regulator IC also has blown. The regulator IC is marked CC3896F made by SB and also has this number '3713045', the only info I can find on the net is provided by the known IC brokers from China. I'd like to get this box running again, so I'm looking for the IC or a replacement PSU which is an ITT PEC 3945 P/N 6064265. Any other info about it like diagrams and datasheets about the CC3896F are also welcome. Thanks, -Rik

8 years, 2 months

UMR computer photos

by COURYHOUSE＠aol.com

Not the GE 200 I am used to! what did it have for a console? Ed# _www.smecc.org_ (http://www.smecc.org) In a message dated 9/26/2016 3:21:41 A.M. US Mountain Standard Time, jwsmail at jwsss.com writes: I was looking thru one of the yearbooks from my time at University of Missouri, Rolla. I found what I think is a photo of a GE-200. I "liberated" this system or one of them to a lab I had, when they were mothballed, and I could swear that is what the systems were. If anyone recognizes them, let me know. This is the first hint of any sort as to what I had. And my memory could be wrong. The square indicator and switch style is very much like what I recall for this particular system. I had gotten handed a couple of very heavy trays of Lambda power supplies which clearly were for some purpose due to how they were mounted. I later found the system I think was a GE-200 neglected in a stockroom in the EE building and recognized that the interconnnect would fit the power supply trays I had. The system was transistorized, not IC I might add. That was why it took 4 or 5 large Lambda supplies. Luckily we had not broken the supply tray up and i was able to play with it. The other thing i think might be of interest are several photos of an analog computer that the EE dept had. I know there was another much larger system in the Physics department as well, and maybe I'll luck out and find a photo of it later. Oh, and the blond at the keypunch. I might add that she is probably retired now. thanks Jim http://s1101.photobucket.com/user/jws1971/library/UMR%20computer%20photos

8 years, 2 months

Short test programs for pdp 11/34

by paulp1＠gmail.com

You might try looking at the M9312 proms that Don North has made available here: http://www.ak6dn.com/PDP-11/M9312/ If you have an M9312 in your system it will have the basic console prom in it. There are listings of the prom contents on that web page. There is also a simple diagnostic prom that loops forever near the bottom of the page. If you don't have an M9312 then you could probably key in a program from the rom listings provided. I'd bet Don will be along shortly to provide a better explanation.

8 years, 2 months

Replacing HP 700 terminal CRTs

by COURYHOUSE＠aol.com

the only difference might be the keycaps and ROMs! let me know! Ed# In a message dated 9/25/2016 9:35:27 P.M. US Mountain Standard Time, davidkcollins2 at gmail.com writes: Apart from the different colors I'd be surprised if all the tubes weren't interchangable between the 700 series. I think the only difference between models is the logic PCA and ROMs etc. The 700 series service manual would confirm one way or the other. David Collins (Sent from out of office) > On 26 Sep. 2016, at 3:08 am, Al Kossow <aek at bitsavers.org> wrote: > > I picked up a 700/60, the ANSI version of the HP 700-series terminal and when I took it > apart to clean, it had a VDC 1401DP31BE inside. I swapped the CRT into a 700/92 which > has a slightly different board, and a burned in amber tube, and it worked fine. > Also I noticed the 700/96 PCB is almost identical to the 700/60, so I'll try a > rom swap to see what happens. > > Too bad there aren't generally available cross reference list for terminal CRTs. > FWIW, the 700/96 has a Philips M32ECD3G CRT. > > VDC is having a "sale" on the 1401DP4 and P31. The tube price is pretty cheap but the > shipping is about double when you price it against their normal $55 price. The shipping > goes down with quantity, so if you buy 5 or so it ends up being about $25 a tube and > significantly cheaper than all of the ones listed on eBay. > > >

8 years, 2 months

ISO: schematics for Bunker Ramo BR2412

by derschjo＠gmail.com

Hi all -- I have myself a Bunker Ramo BR2412 12-bit minicomputer. This is similar (but not identical) to the Nuclear Data ND812. There are schematics / maintenance manuals for the ND812 on Bitsavers which have been immensely helpful. The main difference between the BR2412 and the ND812 is that the BR2412 uses Intel 1103 RAMs (backed up by a big lead-acid battery) rather than core memory. (There are other more subtle differences, the ND812 used incandescent bulbs on the front panel, the BR2412 has LEDs). I've been working on restoring this thing (which has been an interesting challenge -- there are 325 wire-wrap sockets with dodgy connections with the ICs to deal with) and I've been making steady progress, but I've finally reached a point in my debugging where the schematics differ from reality, as I get closer to the memory interface. I can likely work things out by hand, but having a real set of documents would obviously be helpful. I realize this is a long shot since it's a pretty obscure machine, but I thought I'd ask before I dive in too deep here. Oh, and while I'm asking for impossible things, if anyone has any *parts* for one of these, let me know -- I'm missing the TTY interface... Thanks! Josh

8 years, 2 months

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test-drb September 2016