test-drb January 2006

test-drb@ccmp.vtda.org

240 participants
511 discussions

by henk.gooijen＠oce.com

BTW, what I did manage to get done in the past few weeks, is an "upgrade" of two 861's. I replaced the big electromagnetic relay with a modern Solid State Relay. If you install an SSR with zero-crossing detection switch-on, instead of the old relay, the power surge of the big transformer in the bigger UNIBUS PDP-11's will not trip the fuse in the house. It is fairly simple, and if you keep the old relay, you can alwyas revert to the original situation. Here's what I did. 0. Get a SSR with input 3-32VDC. The output is AC rating what you have at home (for your PDP-11's). 1. Get the diagrams from bitsavers. Not really necessary, but they will make you understand better how an 861 works. 2. Remove the electromagnetic relay. 3. Install the SSR (I had to drill one hole, sorry ...) 4. Remove the pilot control board. 5. Cut the trace that connects the reed relay to the *AC* power. The other trace goes to the relay. It depends a little on the type of board, as I have seen a few small differences. 6. Connect the cut trace (to the reed contact) to the "+" of the electrolytic cap. 7. Connect the "-" wire from the electrolytic cap to the "-" of the SSR input. And connect the other contact of the reed relay to the "+" of the SSR relay. 8. Lead one wire from the AC breaker directly to the output cap. From the output cap straight to the AC power socket (Neutral). 9. Lead the "hot" wire from the AC breaker to the SSR AC LOAD input, and a wire from the SSR AC LOAD output to the other contact of the AC power socket (Phase, "hot"). Before you apply power (stand-alnoe, just the 861 box!) check the wiring at least once ...! I haven't had a tripping fuse up till now when I turn on the 11/34. - Henk, PA8PDP. ________________________________ Van: cctalk-bounces at classiccmp.org namens Richard Verzonden: wo 04-01-2006 18:56 Aan: General Discussion: On-Topic and Off-Topic Posts Onderwerp: Re: DEC 874-A Power Conditioner In article <10601040813.ZM28391 at mindy.dunnington.plus.com>, Pete Turnbull <pete at dunnington.plus.com> writes: > On Jan 4 2006, 8:22, Gooijen, Henk wrote: > > Hi Richard, > > I have one 11/03, but AFAIK (I'm at work now) there is no switch > > on the front panel of the 03 to control on/off. > > There should be, on all BA11-M, BA11-M, and BA11-S boxes (except some > expansion boxes that have no LED/switch panel at all) though depending > on the box, it may be labelled LTC or AUX. Mine is labelled "AUX On/Off" and I didn't know what it did. On the 861 power conditioner there is a connector labelled J2. Is this where the switch connects up? -- "The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ: <http://www.xmission.com/~legalize/book/ <http://www.xmission.com/~legalize/book/> > Pilgrimage: Utah's annual demoparty <http://pilgrimage.scene.org <http://pilgrimage.scene.org> > This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.

18 years, 9 months

DEC 874-A Power Conditioner

by henk.gooijen＠oce.com

I am at home now ... my 11/03 has the switch labeled LTC on | off. I checked a few (old black) 861's that I have, but none of them had a "Jx" label. A modern-ish (blank metal) one had J10 and J11 on it printed. AFAIK, all 861's have only "heavy" AC power outlets and small 3-pin control sockets. Get the 861 diagrams from bitsavers, I'd say ... - Henk, PA8PDP. ________________________________ Van: cctalk-bounces at classiccmp.org namens Richard Verzonden: wo 04-01-2006 18:56 Aan: General Discussion: On-Topic and Off-Topic Posts Onderwerp: Re: DEC 874-A Power Conditioner In article <10601040813.ZM28391 at mindy.dunnington.plus.com>, Pete Turnbull <pete at dunnington.plus.com> writes: > On Jan 4 2006, 8:22, Gooijen, Henk wrote: > > Hi Richard, > > I have one 11/03, but AFAIK (I'm at work now) there is no switch > > on the front panel of the 03 to control on/off. > > There should be, on all BA11-M, BA11-M, and BA11-S boxes (except some > expansion boxes that have no LED/switch panel at all) though depending > on the box, it may be labelled LTC or AUX. Mine is labelled "AUX On/Off" and I didn't know what it did. On the 861 power conditioner there is a connector labelled J2. Is this where the switch connects up? -- "The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ: <http://www.xmission.com/~legalize/book/> Pilgrimage: Utah's annual demoparty <http://pilgrimage.scene.org> This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.

18 years, 9 months

Burroughs B1000 (Was: Burroughs L-series)

by alanp＠snowmoose.com

From: Steven Wilson <stevew at ka6s.com> > >What are the Burroughs L-series computers? I started working for > >Burroughs just before the Sperry merger and I guess I missed the > >L-series. > > >I collect B1000 stuff (or, I would collect it if I could find > >anything) and acquired a bunch of B20 systems a couple of years ago, > >so I collect them now. > > >Other than a museum that asked me if I ever found a B1000, I haven't > >found any other collectors of Burroughs stuff. > > >alan > > That's funny - I use to design them ;-) I was a CPU design engineer on > the last two iterations of the B1000 (B1955/B1965). (Hans P should > probably saw something next ;-) Curious what you've got in your > collection? Note my line about "if I could find anything". All I have is printed stuff. The one thing that comes to mind is the "Inside Your Living MCP" material that Art Sorkin wrote. I was tempted to contact some of the old customers and see if they knew the disposition of their B1000s, but most of them were in England and it has now been around 20 years since they were using them. (As I have mentioned here, I did bug fixes on B1000 GEMCOS from 1986 to 1989.) > I'd buy a B1965 if one ever were available! ( I should be able to help > with B1955 too if anyone has one..) I should be able to help get one > running again if required. Same here. Well, as far as buying a B1965 goes. I did most of my work on a B1965. The closest that I have gotten to finding a B1000 is a B1855 (I think that was it) that was at Fort Lewis (WA) and taken out of service in 1997. I was only three years late getting to it. alan

18 years, 9 months

Speaking of 6502s, was Re: 70's micros still available -

by dm561＠torfree.net

Date: Tue, 03 Jan 2006 13:10:54 -0800 From: "Chuck Guzis" <cclist at sydex.com> Subject: Re: Speaking of 6502s, was Re: 70's micros still available - was 1802 problems >how many lanugages were implemented on the 6502, as contrasted >with the x80? Was there ever a 6502 COBOL, FORTRAN or PL/I? (I honestly >don't know, but I suspect that FORTRAN may have existed). The picture >might have been quite different, given the 6800 architecture. >Cheers, >Chuck -------------------------------------- AIM65 (again ;) had PL/I, (called PL/65) - also on Rich's site. Most languages were ported to the PET (although some were for the 6809 in the dual-processor SPET): Ada, APL, Assembler, BASIC (interpreted and compiled), C, Cobol, Comal, Forth, Fortran, Lisp, Logo, Mumps, Pascal & Pilot, to name a few. mike

18 years, 9 months

DEC 874-A Power Conditioner

by oldcpu＠rogerwilco.org

Thanks to comments from Tony, Julian and Henk, I think I now understand how this thing works. I'm not _quite_ ready to power up the CPU so I haven't confirmed the AUX ON/OFF front panel switches functionality, but based on the responses, it seems clear what I should expect. I have, however, confirmed the functionality of the Local On and Remote On settings on the 874 itself, and can confirm that the 3-conductor link between the two 874's is doing it's job properly. In response to Julian's interest, here's the configuration of this 11/23+ system: - KDF11-BA processor -- 512MB (MSV11-PL) -- x2 4-line serial muxes (DZV11) -- a single line (DLV11) -- Controllers for the drives (RLV12 & RXV21) - x3 RL02 w/ a handfull of diskpacks - RX02 dual-drive - x2 VT100 - x2 VT102 - LA120 As I mentioned in the original post, this is all housed in a dual-wide 40" roll-away cabinet (frankly, I have no idea what it's model designation is) with two side-panels/uprights and a connecting 'panel' in between. And, I've got an ASR33 on hand that I might hook up later, for grins. I've got RT11 on the disks right now, and though my eventual goal is to get RSTS running (thanks, Julian, for the offered assistance!), I'm actually going to spend some time with the RT11 first, getting familiar with that, also for grins. Again, thanks to all for the heads up on how this power gear works. J.

18 years, 9 months

VAXStation 8000?

by m_thompson＠ids.net

I have what I believe to be most of a VAXstation 8000. It is about the size of a MV-II, but it is about 10" longer. The front 8" hinges open so you can get to the back of disk drives. It holds a bunch of 5 1/2" disks. The sides open like a clam shell. The the VAXBI card cage is in one side. There is room for a second card cage. I belive that this is where the ES graphics card cage goes. At 12:28 AM 1/4/2006, you wrote: >On 1/4/06, 9000 VAX <vax9000 at gmail.com> wrote: > > On 1/3/06, Ethan Dicks <ethan.dicks at gmail.com> wrote: > > >- > > > I don't have one, but I remember running into them at DECUS > > > conventions... > > > and with a VAXBI bus and a slow CPU (maybe same as VAX8250/8350) > >I don't recall them being VAXBI-based. My recollection was that they >were Qbus-based - essentially a VAXstation-II/GPX, but with *much* >more powerful graphics cards. > >Anyone with actual experience (mine was limited to pushing the mouse >around and twisting the dialbox knobs) can feel free to chime in with >corrections/details. > >-ethan Michael Thompson E-Mail: M_Thompson at IDS.net

18 years, 9 months

DEC 874-A Power Conditioner

by pete＠dunnington.plus.com

On Jan 4 2006, 8:22, Gooijen, Henk wrote: > Hi Richard, > I have one 11/03, but AFAIK (I'm at work now) there is no switch > on the front panel of the 03 to control on/off. There should be, on all BA11-M, BA11-M, and BA11-S boxes (except some expansion boxes that have no LED/switch panel at all) though depending on the box, it may be labelled LTC or AUX. See, for example, http://hampage.hu/pdp-11/1103.html It's the rightmost of the three switches on the panel. Also http://www.abc80.net/pics/PDP11-23_cpu_2_big.jpg -- Pete Peter Turnbull Network Manager University of York

18 years, 9 months

For Trade: SGI 4D series boards, memory, etc

by systemextra＠systemextra.ltd.uk

Hi Mark I am looking for the following items can you help? 018-0495-001 Cable 018-0496-001 Cable 013-1203-001 I/F 012-1204-001 I/F Alun Computer Support Services Specialising in Image Graphics and Unix Systems. Alun Jones Director Systemextra Limited, Woodyard House, Daux Road, Billingshurst, West Sussex, UK RH14 9SJ. Tel: +44 (0)1403 784754 Fax: +44 (0)1403 783921 email: systemextra at systemextra.ltd.uk http://www.systemextra.ltd.uk <http://www.systemextra.ltd.uk/> * "This E-mail is only for the use of the intended recipient and may contain confidential information. If you have received this E-mail in error, please notify the sender immediately, delete the E-mail and do not use or disseminate its contents."

18 years, 9 months

Interesting e-book

by dm561＠torfree.net

For those who haven't read it, here's "A History of the Personal Computer - The People and the Technology," in PDF format, courtesy of our Canadian government: http://epe.lac-bac.gc.ca/100/200/300/allan_publishing/history_personal_comp… mike

18 years, 9 months

DEC 874-A Power Conditioner

by pete＠dunnington.plus.com

On Jan 4 2006, 8:13, Pete Turnbull wrote: > There should be, on all BA11-M, BA11-M, and BA11-S boxes ^ The second item was meant to be BA11-N, of course :-) -- Pete Peter Turnbull Network Manager University of York

18 years, 9 months

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test-drb January 2006