test-drb

test-drb@ccmp.vtda.org

101090 discussions

by aek＠bitsavers.org

the perennial '937' problem just installed 6085 XDE 5.0 from floppies but there is no option in the installer to load and setup to boot settimedove.boot from the copilot volume someone must have figured this out on the other hand, since none of the compilers or actual useful stuff is installed, since you're SUPPOSED to fetch this off the XNS network, maybe not. I should post this on comp.sys.xerox :-)

9 years, 4 months

NWA auctions

by jnc＠mercury.lcs.mit.edu

> From: Jim Stephens > The two bay 11/45 went for twice the bid, since it was listed as 2 pcs > @ 1500 each Yeah, I couldn't quite work that out - did it mean there were two mostly identical ones, and they only had pictures of one, or did it mean 'two racks'? Noel

9 years, 4 months

Panelman Update.

by rodsmallwood52＠btinternet.com

Hi Guys Having established a good stock of panels. I now have got a little time to move my PDP-8/i project along a bit. The front I already had . A kind list member let me have a lights board. I built and and tested it It is compatible with the original /i in form, fit and function. This means you could attach wires and paddle (Filip Chip Type ) boards to it and plug it into a real /i and it should run. As I have said before the /i is a wire wrap back plane and loads of flip chip boards. It would not be possible to duplicate it. So modern technology front and center please! The Raspberry Pi is cheap, available and I have one. I also found a 32 port Pi I/O expansion board that you can have up four of on one Pi. SimH runs on a Pi and it does do 8/i emulation. It looks like SimH is written in C. Not a language I have used but I'm sure the hundreds of different versions are all very good ! Hopefully you can declare and call SimH functions under Python. The four 32 port Pi I/O expansion boards I ordered should be here to-day or Monday. They are accessed using the I2C bus from the Raspberry Pi The switch panel is a bit more of a problem. I'm sure copies of the DEC butterfly rocker switch will become available. in the meantime commonly available rocker switches will suffice for development purposes. Although Oscar multiplexed his lamps I may be able to find out how the system signaled it needed to update the lamp display. Rod Panelman Smallwood -- PDP-8/e PDP-8/f PDP-8/m PDP-8/i Front Panels ex Stock - Order Now

9 years, 4 months

ASR 33 buzzing

by COURYHOUSE＠aol.com

ok ! there are a set on ebay also but not cheap if you can live with the electronic stuff and occasionally print a page you will do fine with the links... I like to have hard copies of manuals here in the museum's library and while I like searching things electronically I really appreciate something that is bound paper to sit and an arm chair and read.... now If I am gonna take the paper to the greasy machine to work, I make a copy of page needed or print from the online one! Ed# _www.smecc.org_ (http://www.smecc.org) In a message dated 10/13/2016 10:58:28 P.M. US Mountain Standard Tim, vintagecomputer at bettercomputing.net writes: I missed those somehow.. thank you. Got a lot to learn with this beast! Sent from my Samsung device -------- Original message -------- From: COURYHOUSE at aol.com Date: 2016-10-13 10:30 PM (GMT-08:00) To: cctalk at classiccmp.org, vintagecomputer at bettercomputing.net Subject: Re: ASR 33 buzzing did you get the links we sent you over on the greenkeys list for sources on 33 manuals and paperwork we sent you? We did not get an acknowledgment. thanks Ed# _www.smecc.org_ (http://www.smecc.org/) In a message dated 10/13/2016 4:37:20 P.M. US Mountain Standard Time, vintagecomputer at bettercomputing.net writes: The buzzing definitely seems to be coming from the motor. I put a plastic tool to the casing and could feel it vibrating. However, I can turn it by hand (clockwise) and see all the gears and striker mechanisms working. It did manage to work briefly yesterday.. it did kind of a 'reset'. But yeah.. not today. -----Original Message----- From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Paul Koning Sent: Thursday, October 13, 2016 4:28 PM To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> Subject: Re: ASR 33 buzzing > On Oct 13, 2016, at 7:14 PM, Brad H <vintagecomputer at bettercomputing.net> wrote: > > Posting around hoping somebody might be able to point me in the right > direction. I tried greenkeys but no response. > > > > I have an ASR 33 I got. When I plug it in on Line mode there is a > clicking in the power supply area and nothing else. If I put it to > Off or Local, there is a loud buzzing sound and eventually a 2A fuse > on the back left side of the machine blows. It's like something's > stuck but the noise is kind of hard to pin down. Wondering if there's > any Model 33 experienced guys out there. :) > Given the blown fuse I'd suspect a stuck mechanism, so the motor is stalled and you're getting overcurrent. Try turning the motor by hand to confirm. paul

9 years, 4 months

ASR 33 buzzing

by vintagecomputer＠bettercomputing.net

Yeah I'm sure we must have bad cap(s) here. ?I think pretty much everything is original on this thing. ?I've no idea how old it is. I'll have to read through the manuals and figure out where the cap is. ?I'm assuming it must be round.. although directly under the fuse is a little black box connected to it. ? I note when I plug it in on Line sometimes there's a single metallic clack from the PSU area and sometimes it's multiple..lioe someone's operating a telegraph. I was rotating the motor and seeing how things work (hard to believe it doesn't just fly apart given how intricate it is). ?I was able to push keys.. however now I have the top row locked down and the keyboard cover won't fit back on.. heh. ?Hoping I'm not breaking things as I go. Sent from my Samsung device -------- Original message -------- From: "drlegendre ." <drlegendre at gmail.com> Date: 2016-10-13 10:17 PM (GMT-08:00) To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: Re: ASR 33 buzzing Tony's suggestion is the best at this point - look for issues with the motor start and/or run caps. A shorted (or open..) cap can certainly cause this issue. Shorted and it draws excess current in the cap, open and it may prevent motor starting / running which likewise draws excess (stall) current, but in the motor windings. Also, it shouldn't be too hard to isolate the motor assy. itself from the rest of the circuit - lift the correct lead(s) from the AC power distribution system. It may be much easier if you can deal with the motor / cap assy. as a single entity, rather than within the rest of the complexity. This is just generic advice from a guy who's never fixed a 33. But assuming yours has the standard AC synchronous motor, it should all apply. Motors only draw excess current for a very few reasons - overload / stall, shorted windings, bad start / run caps and possibly associated start / run relays. On Thu, Oct 13, 2016 at 11:34 PM, tony duell <ard at p850ug1.demon.co.uk> wrote: > > > The buzzing definitely seems to be coming from the motor.? I put a > plastic > > tool to the casing and could feel it vibrating. However, I can turn it by > > hand (clockwise) and see all the gears and striker mechanisms working. > > Should the motor be running in the 'Off' positon of the switch, though? > > If the motor is buzzing and taking a high current (which blows the fuse), > what about the motor run capacitor (the one on the mechanism chassis > itself, wired to the motor)? Maybe it has failed. > > -tony >

9 years, 4 months

ASR 33 buzzing

by COURYHOUSE＠aol.com

did you get the links we sent you over on the greenkeys list for sources on 33 manuals and paperwork we sent you? We did not get an acknowledgment. thanks Ed# _www.smecc.org_ (http://www.smecc.org) In a message dated 10/13/2016 4:37:20 P.M. US Mountain Standard Time, vintagecomputer at bettercomputing.net writes: The buzzing definitely seems to be coming from the motor. I put a plastic tool to the casing and could feel it vibrating. However, I can turn it by hand (clockwise) and see all the gears and striker mechanisms working. It did manage to work briefly yesterday.. it did kind of a 'reset'. But yeah.. not today. -----Original Message----- From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Paul Koning Sent: Thursday, October 13, 2016 4:28 PM To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> Subject: Re: ASR 33 buzzing > On Oct 13, 2016, at 7:14 PM, Brad H <vintagecomputer at bettercomputing.net> wrote: > > Posting around hoping somebody might be able to point me in the right > direction. I tried greenkeys but no response. > > > > I have an ASR 33 I got. When I plug it in on Line mode there is a > clicking in the power supply area and nothing else. If I put it to > Off or Local, there is a loud buzzing sound and eventually a 2A fuse > on the back left side of the machine blows. It's like something's > stuck but the noise is kind of hard to pin down. Wondering if there's > any Model 33 experienced guys out there. :) > Given the blown fuse I'd suspect a stuck mechanism, so the motor is stalled and you're getting overcurrent. Try turning the motor by hand to confirm. paul

9 years, 4 months

ASR 33 buzzing

by vintagecomputer＠bettercomputing.net

Posting around hoping somebody might be able to point me in the right direction. I tried greenkeys but no response. I have an ASR 33 I got. When I plug it in on Line mode there is a clicking in the power supply area and nothing else. If I put it to Off or Local, there is a loud buzzing sound and eventually a 2A fuse on the back left side of the machine blows. It's like something's stuck but the noise is kind of hard to pin down. Wondering if there's any Model 33 experienced guys out there. :)

9 years, 4 months

Where are the cctech archives before November 2014 ?

by barythrin＠gmail.com

Good find on archive.org even in .gz format still. I'm fairly positive the incident was discussed on the mailing list and vcfed. Issues happen and it was a perfect storm. I like to chock it up to new technology failing us. ;-) Kudos to Jay for keeping this alive as well as he does. Lots of great history and stories are definitely discovered and archived here.

9 years, 4 months

Speaking of Flight Sim. love Mysteries at the Museum but misuse of HP PROP

by COURYHOUSE＠aol.com

I love this Mysteries at the Museum show but sometimes some of the pros they use are a bit off! FACT checking props on Mysteries at the Museum! Why is link using a 200 A or B HP audio Oscillator! there he is at a work bench with this HP thing and a set of bellows allegedly 1929 era. I laughed my ass off..... Ed# >from history... The Origin of the Link Trainer. Today in aviation history, on April 14, 1929, Edwin A. Linkfiled his patent application for his first Link Trainer, and what of HP first product? the 200a and the special one for Disney? 1938 * Work begins * HP invents first product * Oscillators for Walt Disney ====================================================== ok.... there we go! just can't be near 1929.. now I am sure some time Link Had or his people used early HP stuff... but not in the time frame as presented in 29 or neat 29. Ed# _www.smecc.org_ (http://www.smecc.org/)

9 years, 4 months

Gould 32/77

by jnc＠mercury.lcs.mit.edu

> From: Jon Elson > we got an 11/45 used and ran RSX-11M with about 4 users on it, it > worked VERY well About when I first got to MIT ('74), they were running the main introductory programming course for CS students (6.031, for those to whom that means something) on an 11/45; it had (IIRC) about 30+ Decwriters hooked up to it. It ran a home-rolled OS called 'Delphi' (written in Macro-11, I suspect); the course covered assembler, Algol (compiled, I think - but it may have been interpreted, I'd have to check) and LISP (interpreted). ISTR that the response time on the machine was usually pretty good. By a very odd chance, some years later I got that very machine in a trade, and it became the main time-sharing machine (running Unix V6) for our group (CSR) at LCS (545 Tech Sq). We beefed it up with an Able ENABLE and I think 1MB of memory, and IIRC the optional Able cache for the ENABLE, and it was _quite_ zippy - I think 'mips' returned about 3.0, about as fast as the DSSR 11/70 on the other side of the 5th floor at TS. Of course, it didn't have the mass storage I/O bandwidth of the /70, but we were very happy with it. > of course, when we moved up to a VAX, that was even better! Heh. Give me an 11/45 with an Able ENABLE any day! :-) Noel

9 years, 4 months

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