test-drb

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101090 discussions

Looking for DEC DZ11 20ma dist panel and LA34 tractor feed assy.

by bub7734＠yahoo.com

Hello, Tony, Thanks for the reply. In reply to Tony Duell ard at p850ug1.demon.co.uk, Sun Jun 16 15:49:53 CDT 2013 > > I'm trying to free up slots in my PDP-11, so I'm looking to remove the DL11's I'm using > > and want to replace them with a single 20ma DZ11. Does anyone have a DZ1 > > Firstly, I am probably telling you what you already know, but the DZ11 > and DL11 are totally different in software. If you are doing anything out > of the ordinary and have sustom drivers you ahve a lot of work ahead. Of course it requires a different device driver. ? > > 1 20ma > > dist panel they'd part with? > > Soecondly, IIRC the disptribution panel is essentially just connectors. I > have a few of the even older DJ11 muxes and a couple of the distirbution > panels were home-made. Berg conenctors on a bit of square pad board with > wire-swap wire goign off to what we call 'chocolate blocks' [1]. Looks a > right msess, but apprently it was used at a university to conenct up > ASR33s for many years with no problems. > > [1] Does that term mean anything to you? It's a common term over here for > thos plastich screw terminal blocks Modern ones are norally white, > flexible plastic (nylon?) the very old ones were a brown brittle themoset > plastic, hence the name. I know them as Terminal Blocks.? The intention here is to connect Teletype Model 33s as well. > Given that the current loop signals are pretty low speed, you would > almost certainly get away with taking a length of ribbon cable, putting a > BERG socket on one end, splitting the other end into individual wires and > puttign them on screw terminals. > > -tony I'm specifically looking for the DEC distribution panel at this time, but thanks for the suggestion though. Regards, -scott

12 years, 9 months

Early UNIX File Optimization

by tom94022＠comcast.net

Second posting since for some reason the first posting apparently didn't make it. -----Original Message----- From: Tom Gardner [mailto:tom94022 at comcast.net] Sent: Monday, June 17, 2013 10:07 AM To: 'cctalk at classiccmp.org' Subject: RE: Early UNIX File Optimization I have a vague recollection that early time sharing systems, in particular UNIX, enforced I/O fairness by fragmenting files and thereby freeing the I/O between fragments. However I don't recall much and this might be an artifact of aging :-) If so, I am curious as to how this was implemented - interleaving sectors or some more complex physical fragmentation or ?? Anyone point me to any references? Tom

12 years, 9 months

Best comeback of the year (was: Re: Antiques roadshow)

by mtapley＠swri.edu

At 16:49 -0500 6/19/13, Fred wrote: >On Wed, 19 Jun 2013, Cory Smelosky wrote: > > I was quite confused when I read "adjustable spammers". ;) > >Find them, and we will adjust them. Grumpy ol' Fred for President. I'll vote as many times as it takes. -- - Mark 210-379-4635 ----------------------------------------------------------------------- Large Asteroids headed toward planets inhabited by beings that don't have technology adequate to stop them: Think of it as Evolution in Fast-Forward.

12 years, 9 months

Re: Yellowed/Cosmetically Damaged Apple IIGS Monitors $20 dollars each plus shipping

by mark＠wickensonline.co.uk

S Sent from my HTC ----- Reply message ----- From: "Mark Martin" <storycrafter at gmail.com> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: Yellowed/Cosmetically Damaged Apple IIGS Monitors $20 dollars each plus shipping Date: Wed, Jun 19, 2013 9:50 pm Whereabouts do you live? Offering local pickup? On Wed, Jun 19, 2013 at 3:39 PM, Steven Landon <slandon110 at gmail.com> wrote: > Got about 15 Apple IIGS Monitors that are yellowed and or lightly > scratched. 15khz sync, Good for Amigas, Ataris, and Apple IIGS's > > $20 dollars each plus shipping via USPS Parcel Post > > Trying to empty the storage unit of these things >

12 years, 9 months

El Reg : Nuke plants to keep PDP-11 UNTIL 2050!

by seefriek＠gmail.com

My brothers company is a specialty shop that does IT related services (mostly custom development work) for small to mid-sized manufacturing companies (bro is an industrial engineer by training...he speaks the language). He periodically pings me because a client has something outside of his core competency and he want's me to take a look and see if someone in my network can help out. Sometimes it's a PDP-8 (or several) running an industrial loom, or a DG Nova controlling a CNC machine the size of a bus, or some ancient IBM thing cranking out invoices/schedules/statistics in the back room. Or an industrial grade PC (8088 vintage) running a DOS app and custom A/D-D/A hardware where all the menus and doco were in Italian controlling a fabric dyeing machine about the size and shape of a Soyuz (I got the call on this one because I can passably read Italian, not because of a technical value add). There's a cadre of folks I can count on to help out and never fail to miracle the odd replacement part or bit of code to keep things going (for a price, of course). There will absolutely be shops running things much older than a PDP-11 in 2050.

12 years, 9 months

Early UNIX File Optimization

by tom94022＠comcast.net

I have a vague recollection that early time sharing systems, in particular UNIX, enforced I/O fairness by fragmenting files and thereby freeing the I/O between fragments. However I don't recall much and this might be an artifact of aging :-) If so, I am curious as to how this was implemented - interleaving sectors or some more complex physical fragmentation or ?? Anyone point me to any references? Tom PS: as in infrequent poster I am happy to make a small change to the statistics

12 years, 9 months

Looking for: Sperry/Beckman SP-333 (gas discharge display)

by derschjo＠gmail.com

I'm working through repairing a Tektronix 31 calculator for my dad (late father's day gift...). It seems to mostly be working now but all of the display panels except for two are dead (as I understand is pretty typical). The display consists of two SP-333s and four SP-332s. I've found a source for the SP-332s (2digit 7-segment displays) but can't find much for the SP-333s (3digit 7-segment display). Here's the specs: http://www.tube-tester.com/sites/nixie/data/SP-333/sp-333.htm Found a couple of "request a quote!" type listings on the 'net but that's about it. I need two of these beasts to get things visible again... Thanks in advance, Josh

12 years, 9 months

Antiques roadshow

by jws＠jwsss.com

I've gotten tickets to an upcoming one of these, and besides a couple of items which fit their profile, am thinking of taking at least a small board or so to see what that does with their appraisers. anyone have any experience with them. This is the US mob. I'd never consider doing it with the UK ones. they want stuff from the 19th century or before, or WW2, etc. I am taking a sextant and a platinum broach. I have what I think is a Dec trainer board I'm going to take. i doubt taking any minis would be more interesting than the dec trainer. If they don't know that is a bit rare, then anything else they would say about other items would probably be useless. I'd like to see more scientific and computer, calculators, etc., on the show instead of the crap they sometimes have. Seems like everyone has a Tiffany lamp, or a bit of scrimshaw to show (fake and plastic, respectively). I was advised in an email that oddball stuff had shorter waits. Only guarantee is to get into the filming room where the appraisers are, and get stuff appraised. Will report back if there is anything useful that happens. Jim

12 years, 9 months

Yellowed/Cosmetically Damaged Apple IIGS Monitors $20 dollars each plus shipping

by slandon110＠gmail.com

Got about 15 Apple IIGS Monitors that are yellowed and or lightly scratched. 15khz sync, Good for Amigas, Ataris, and Apple IIGS's $20 dollars each plus shipping via USPS Parcel Post Trying to empty the storage unit of these things

12 years, 9 months

Looking for: Sperry/Beckman SP-333 (gas discharge display)

by dm561＠torfree.net

----- Original Message ----- > Date: Tue, 18 Jun 2013 21:39:32 -0700 > From: Josh Dersch <derschjo at gmail.com> Since we're 'comrades-in-arms' I was especially hoping to be able to help you out, but alas, although I have some NOS .55" 5-series displays the only .33" 3-series I have are the two-digit SP332s that you already have; I assume you don't need any more? Why not check out the various places that advertise having SP-333s; can't hurt to ask for a quote... I believe Heathkit also used these, although I don't remember which size/type; might be worth inquiring on one of those lists. mike

12 years, 9 months

antique machines Rochester NY

by sales＠elecplus.com

If you can pick up large old antique machines, instead of having them scrapped, and can offer to pay something for them, please let me know. We have another recycler onboard. Cindy Croxton Electronics Plus 1613 Water Street Kerrville, TX 78028 (830)792-3400 phone (830)792-3404 fax AOL IM elcpls _____ No virus found in this message. Checked by AVG - www.avg.com Version: 2013.0.3345 / Virus Database: 3199/6423 - Release Date: 06/19/13

12 years, 9 months

Would anyone be interested in a Psion Wavefinder?

by lproven＠gmail.com

I think possibly the last ever Psion consumer product - a USB DAB radio for 32-bit Windows PCs only. http://www.ebay.co.uk/itm/271223550560?ssPageName=STRK:MESELX:IT&_trksid=p3… Starting at UK?0.01. -- 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 Tel: +44 20-8685-0498 ? Cell: +44 7939-087884

12 years, 9 months

Nuke plants to keep PDP-11 UNTIL 2050! • The Register

by woyciesjes＠sbcglobal.net

http://www.theregister.co.uk/2013/06/19/nuke_plants_to_keep_pdp11_until_205… -- --- Dave Woyciesjes --- ICQ# 905818 --- CompTIA A+ Certified IT Tech - http://certification.comptia.org/ --- HDI Certified Support Center Analyst - http://www.ThinkHDI.com/ Registered Linux user number 464583 "Computers have lots of memory but no imagination." "The problem with troubleshooting is that trouble shoots back." - from some guy on the internet.

12 years, 9 months

Need DG TBOOT and FIXUP

by steve＠stephenmerrony.co.uk

Can anyone send me a copy of TBOOT and standalone FIXUP for late versions of AOS/VS for the MV DC series - ideally 7.71 or 7.70? My MV/2500 is now loading its microcode OK and passing diagnostics, but the system disk is corrupted so I can go no further until I either locate a copy of the System Media or at least the above two programs. Steve -- /Stephen Merrony Email: steve at stephenmerrony.co.uk http://www.stephenmerrony.co.uk http://stephen.homedns.org/dg/

12 years, 9 months

pen plotters?

by nojay1＠gmail.com

I was Googling for information on the control codes for an old CalComp 1042 PCI roll plotter we have tucked away and found your 2007 message about possessing a copy of the technical manual with, I think, the command set for plotters like this. Do you still have the data and would you be willing to share it with me? Cheers.

12 years, 9 months

RS232 signal chracteristics

by ard＠p850ug1.demon.co.uk

Chuck (I think) mentioned that he had never seen a proper specification of the RS232 (or whatever) signals. I think CCITT standard V.28 is much the same thing, and it can be found at : http://www.etsi.org/deliver/etsi_tbr/001_099/002/01_20_63/tbr_002e01c.pdf It certainly seems to have reasonable descriptions of the signal electrical characteristics. -tony

12 years, 9 months

Straight 8 front panel

by mloewen＠cpumagic.scol.pa.us

On Tue, 18 Jun 2013, Bill Sudbrink wrote: > Pontus Pihlgren wrote: >> Does it look like this? >> >> http://archive.computerhistory.org/resources/still-image/DEC/PDP-8- >> S/dec_pdp-8-s.display_of_pdp8s.102630596.lg.jpg >> >> That is supposed to be an 8/s. Could it be that the first(prototype?) >> 8/s where put in an Straigh-8 chassi? > > Slightly off the subject, I notice that the chad bin on the ASR33 in > that photo is opaque. I've never seen (or at least noticed) one like > that before. Does anybody have one? That one might be a metal chad bin. I have one for my ASR33. Part number is 182924 for the metal bin, 182965 for the later clear plastic bin. Mike Loewen mloewen at cpumagic.scol.pa.us Old Technology http://sturgeon.css.psu.edu/~mloewen/Oldtech/

12 years, 9 months

Straight 8 front panel

by blstuart＠bellsouth.net

As far as I can remember, every straight 8 I've seen in the wild and almost every picture I've seen has the dark plexiglass panel with the paddle switches similar to those on the 11/20. However, I have a copy of the user's manual dated 12/64, and the picture of the machine on Page viii has what appears to be a simple brushed aluminum panel with little light bulb covers sticking through it and the switch register switches are all ordinary mini toggle switches. So my question is were there any ever shipped with that style of front panel, or was that picture of a prototype that was revised before any shipped? BLS

12 years, 9 months

Software Sounds (on 45)

by derschjo＠gmail.com

I snagged this record off eBay because I knew it had to at least be interesting... thought you all might get a kick out of it: http://yahozna.dyndns.org/scratch/softwaresounds/ (mp3 and raw wav available) It's entitled:'Software Sounds - "Music for the Computer Professional"' and is apparently the creation of a man named Laz Bouros (who apparently never made it as a rock star but is today an Executive Consultant, if the Internet is leading me true). There's no date anywhere on it, but it has to be from the early-mid 80s. It came with a small pamphlet describing the both the record and the record label, which I will transcribe for you: ------ The Company: Software Sounds is an independent Canadian record company dedicated to developing a new market in the record industry through the use of an innovative musical product. The Market: The millions of computer professionals who operate, program, design, and manage computer systems throughout Canada and the U.S. provide a dynamic yet untapped market for the music industry. The Products: "Computer Songs", in a soft rock format, with lyrics that capture the human struggle as well as the lighter side of the computer world, are the new musical products. The Writer: Laz Bouros, a computer consultant and composer, has spent many years working in the computer environment and has written many songs on a variety of themes. ------- Alas, music for "the millions of computer professionals" never caught on, perhaps it couldn't compete with Devo andKraftwerk? - Josh

12 years, 9 months

cctech Digest, Vol 118, Issue 26

by michael.99.thompson＠gmail.com

> > From: Richard <legalize at xmission.com> > To: cctalk <cctalk at classiccmp.org> > Cc: > Date: Mon, 17 Jun 2013 15:02:03 -0600 > Subject: Re: Sun-2 docs available > > In article <CA+oaVqyDjkS5P=7fXYymHHpvq= > ZciuzMsV_E-n8AXrqMo90jOw at mail.gmail.com>, > James Carpenter <jim at deitygraveyard.com> writes: > > > This will be useful to me. I have a (nearly) fully functional 2/120. > > However, I have very little documentation, especially for the > > hardware. Need anything I can get. > I have a fully functional 2/120 and disk tower, with a 2/50 client. I would be happy to help with any issues that your system might have. https://sites.google.com/site/mthompsonorg/Home/sun-microsystems/sun-2 > -- > Michael Thompson

12 years, 9 months

USB (Re: Next completely OT topic:)

by cctech＠beyondthepale.ie

> > > > The part of RS-232C I _really like_ is the impedance spec, the part > > that says that any pins or combinations of pins may be shorted to one > > another or to any voltage source within, I think, the valid RS-232C > > voltage range (-15V to +15V or some such - I forget the exact limits), > > with the shorts maintained indefinitely, without damage. > > I have to agree with the above. > > I also like the splitting of protective ground and signal ground. > > You'd almost think it had actually been designed by competent > > electronics engineers or somethin'.... On the other hand, I regard protective ground as something that seemed like a good idea at the time but what protection it would provide and how did not seem to be adequately thought out until much later versions of the standard, if at all. When making up an serial cable, I usually leave it out, not out of laziness but because I think I'm probably as well or better off without it. (at least that's my excuse and I'm sticking to it!) Regards, Peter Coghlan.

12 years, 9 months

Next completely OT topic:

by dm561＠torfree.net

----- Original Message ----- > Date: Mon, 17 Jun 2013 08:34:35 -0800 > From: N0body H0me <n0body.h0me at inbox.com> > This hobby gave me a peaceful, easy feeling in those days (to borrow > a line from the Eagles). Folks were always eager to help, always > willing to lend a hand (and maybe a tape image or two), and we'd > have a good laugh while we were at it. > > We loved our machines, and we loved to expend the effort just to > make them 'go' and talk about how we did it. That's what our hobby > (and this mailing list) was really all about. > > I'm not saying that the above isn't true anymore: I'm simply saying > that the mood and character of our hobby has changed over the years, > and that there are folks who used to have alot of interesting stuff > to say, are now silent. Well, if you check out some of the other classic computer lists I think you'll find that the above environment is still very much alive and you'll find some of those 'silent' folks over there instead, as I'm sure some folks on here who also belong to those other lists can confirm; the day rarely goes by when Chuck doesn't help someone with advice, an uploaded file or two, even on occasion a small custom program over on Erik's Vintage Computer List, and there are many, many other people helping each other out, trading parts, building new add-ons, sharing experiences etc., there and on other lists like the Cromemco list, Club100 (R-S), CBM-Hackers, etc. etc. Sure there are more 'collectors' these days who are interested in $$s, but I think that's really almost a separate issue altogether and I don't see much of that on CCtalk anyway. I'd say that it's not so much the hobby that's changed, but the mood and character of this list, or perhaps it's only remained the same while others (especially the VCF) have sprung up where newcomers are warmly welcomed, birthday greetings are exchanged, 'PeeCees' and Microsoft products and users are not disparaged or insulted, nobody quibbles over top vs. bottom-posting, name-calling is discouraged, and for the most part people talk about classic computer issues. As I said, you'll find some of the folks who are now 'silent' here hanging out over there instead, not to mention those folks who are on several lists in addition to this one and generally much more active on the other lists; even Gene tends to be much nicer on the VCF ;-)... I have talked to several people who thought it would be useful to join CCtalk, but after reading through a few days' worth of traffic decided it would be a waste of time... That's really my point when I climb up on my soapbox...

12 years, 9 months

USB

by dm561＠torfree.net

----- Original Message ----- > Date: Mon, 17 Jun 2013 11:32:12 -0700 (PDT) > From: Fred Cisin <cisin at xenosoft.com> ... > Youse guys will hijack ANY thread! > The original post in this thread was a perfectly normal > off-topic/meta-topic rant about what we argue about, and > you have moved it COMPLETELY back into classic computers! > -- > Grumpy Ol' Fred cisin at xenosoft.com > (#2, but I s'pose I could try harder to be the most prolific & offensive) Now THAT's the spirit!!! I'm rootin' for ya! ;-)

12 years, 9 months

Decwriter power supply transistors R3004

by stsauveur＠desktopint.com

According to the data I have (from my DEC PSE days) - 15-12782-00 was a BUY69A http://www.digikey.com/product-search/en?x=11&y=17&lang=en&site=us&KeyWo rds=BUY69A Phil -----Original Message----- From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org] On Behalf Of Brian Knittel Sent: Sunday, June 16, 2013 7:19 PM To: cctalk at classiccmp.org Subject: Decwriter power supply transistors R3004 Hi all, The LA-120 Decwriter that I got off Craigslist a couple of weeks ago has a dead H7150 power supply. Transistors Q1 and Q2 are open and shorted, respectively, and fusible resistor R4 is open. I'd guess that failure of Q2 led to the other two parts going. Q1 and Q2 are high voltage NPN power transistors in TO-3 cans, labeled __ 81 [ti logo] 41 (or maybe 4I but I'm guessing for a date code, 41) R3004 BRITAIN DEC part number appears to be 15-12782-00. The printset identifies them as "NPN 100W S1325 15". I can't find any substitution info online. There is a NOS pair for sale on eBay. So that's one option. Does anyone know what the modern equivalent(s) are? And what if you do, where did you find the reference? Thanks, Brian

12 years, 9 months

Alternative 4P4C (RJ9) connector sources

by brain＠jbrain.com

This is evidently the connector on the Kaypro keyboard: http://www.digikey.com/product-detail/en/TM1R-616P44-35S-150M/H11390-ND/113… Well, close to it, anyway. The original seems to be a Berg 616p And yes, it's erroneous to call it an RJ9, but it's easier to find in the store if you go that route. Before I go plunk down $7.10/connector for 5 connectors (mouser has a bit cheaper price, but their pic is wrong), anyone have a source that's not so steep ($36.00)? Jim -- Jim Brain brain at jbrain.com www.jbrain.com

12 years, 9 months

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