test-drb August 2015

test-drb@ccmp.vtda.org

206 participants
257 discussions

by peterbrown10＠hotmail.com

--Forwarded Message Attachment-- From: cube1 at charter.net To: cctalk at classiccmp.org Date: Sat, 22 Aug 2015 09:23:06 -0500 Subject: Re: HP 5480A, or, obscure HP instruments / was Re: More on manuals plus rescue On 8/22/2015 8:14 AM, Tothwolf wrote: > > It only helps a little though and when eBay eliminated wildcard matching > awhile back, they also reduced the maximum query length. What I /really/ > don't like about eBay's current search system, is how it substitutes > keywords internally. If I search for "Compaq", I don't want results for > "HP", and likewise if I search for "HP", I don't want results for > "Compaq"... > [Straying towards test equipment part] Was there any resolution to the original request for HP5480A service information? I have fiches for this instrument as follows 1. 5480A - Signal Analyzer Operating manual Part 1 - 05480-90014(fiche) - 2 fiches, 60 pages per fiche 2. 5480A/B - Signal Analyzer system vol 1System service manual - 05480-90015(fiche) 7 fiches, 60 pages per fiche 3. 5480A/B - Signal Analyzer system operating and service manual - 05480-90025(fiche) 5 fiches, 60 pages per fiche 4. 5480A/B - Signal Analyzer with 5485A, 5486AB, 5487A, 5488A service Volume 2, 3 and 4 - 05480-90016(fiche) 8 fiches, 60 pages per fiche .. but no way of printing them out [On topic part] Is there a cost effective / group accessible method for making manuals that were originally supplied on fiche available to the group? Regards Peter

9 years, 4 months

De-yellowing

by COURYHOUSE＠aol.com

and I will add... the Retrobrite... we are not sure what the long term effect is.... It would be a real bummer if 50 years from now the object decomposes.... OH NOOOO!!!! Ed# _www.smecc.org_ (http://www.smecc.org) In a message dated 8/24/2015 12:37:14 P.M. US Mountain Standard Time, wdonzelli at gmail.com writes: > I'm not into the de-yellowing thing myself. There's no evidence that > de-yellowing improves the durability of objects. A museum curator preparing > an exhibit might well use a water-based acrylic that can easily be washed > off. That is what the Air and Space Museum has done for a while - a very thin wax coat covers the original, untouched finish, and a new paint job is applied onto the wax. Apparently it is easy to strip off, thus a reversible portion of a restoration, but I think the paint is not durable at all (which is why you should not touch things in museums unless given permission). I am not a fan of the Retrobrite process, although I have never tried it out. In my mind it just seems wrong. -- Will

9 years, 4 months

Looking for some shipping help with a M33 teletype

by rdawson16＠hotmail.com

I posted this about a week or so ago. I bought a teletype in Elkorn, Wisconsin and need a volunteer to help with the shipping; Take it off the pedestal; Put the shipping bolt in the printer; Watch craters and freighters, that they have plenty of foam to cushion the unit. I will pay you for this service... Thanks, Randy Dawson

9 years, 4 months

VMS7.3 dismount of a device with pagefile before shutdown?

by holm＠freibergnet.de

Hi, I've managed to relaocate the pagefile.sys of my VMS7.3 to the secondary disk disk1$dia1 because of space considerations of the first disk (380MB total, free blocks 228672 now). I've seen complaints of the system that the disk wasn't properly dismounted after each reboot and would be rebuild. A hint from my friend Vaxman was, to mount the disk with the option /NOREBUILD in SYPAGSWPFILES.COM so it looks like this now: $ MOUNT/SYSTEM/NOASSIST/NOREBUILD DISK1$DIA1: DATA1 $ RUN SYS$SYSTEM:SYSGEN INSTALL DISK1$DIA1:[SYSEXE]PAGEFILE1.SYS/PAGEFILE EXIT $ EXIT Is there an other way to properly dismount the drive at the shutdown? My home directory lives on the 2nd disk too..and I think /NOREBUILD supresses the warning message, but not the problem at all.. Regards, Holm -- Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe, Freiberger Stra?e 42, 09600 Obersch?na, USt-Id: DE253710583 www.tsht.de, info at tsht.de, Fax +49 3731 74200, Mobil: 0172 8790 741

9 years, 4 months

Sign magnitude, one's complement, two's complement

by spc＠conman.org

For my own morbid curiosity, and because it came up on another mailing list I'm on [1], what machines commercially avaialble were sign magnitude and one's complement? Every machine I've encountered was two's complement (okay, IEEE 754 [2] is a sign magnitude format but I'm talking about integer implementations here, not floating point). I've only found reference to one sign magnitude computer (the IBM 7090, release in 1959) and a few one's complement machines (mostly the PDP series from DEC). Where there others? And honestly, are there any machines that use anything other than two's complement today? -spc [1] http://lua-users.org/lists/lua-l/2015-08/msg00386.html [2] AKA floating point.

9 years, 4 months

Indianapolis: More classic computing equipment than I can shake a stick at.

by maxxtw＠gmail.com

Anyone who's passing through, or lives near Indianapolis, feel free to give me a shout to set up a time to peruse what I have. I have amassed enough machines to take on their own gravitational pull. Most are in various states of disrepair, in need of attention, but quite a few still work or don't need much work to be functional. A number of machines I intend on keeping for their "neat" factor (like an Olivetti M20) but might be persuaded to part with. Apple (bunch of IIc's, IIe's, IIgs's) Macintosh (40 or so compact Macs - 512, Plus, SE, 'splodey-battery-SE/30's -, a big 'ol stack of 68k and PPC desktops, PowerBooks, a stack of DuoDock II's) Kaypro (maybe 6?) Osborne Compaq Portables (luggable and plasma) Epson QX-10 (2 machines, 1 monitor, pretty certain I have the Valdocs disk somewhere) IBM (5150's, 5160's, and a 5170 with box, and a few monitors) Wang (PC S1-2 with keyboard/monitor(s)) Franklin 8000 with keyboard A few 386/486 machines ADM 3A terminal (doesn't power on, but it's cute) Amiga 2000HD (boots, but I don't have a keyboard or mouse, and the floppy drives continuously seek) Amiga 500 (untested, no power supply) C64's (definitely for parts!) and some drives Tandy 1000 EX (untested) NeXT 21" Color Monitor (too huge and heavy for me to keep, I'll be happy with a VGA converter when I find one) And probably a few other things I'm forgetting about. Price-wise, basically make me an offer. Scrap metal prices are fine with me for a lot of machines so long as they're not actually getting scrapped (hence the post here!). If you're looking for something specific, let me know and I'll see what I have. Thanks! Kind regards, -Maxx

9 years, 4 months

FS: PDP-11/55

by rob＠krten.com

Hi all, I have a PDP-11/55 for sale (Ottawa, Ontario, Canada). Bids open until 2015 09 15, buyer to arrange shipping, I will have it wrapped and ready to go. Please visit: www.krten.com/~rk/museum/index.html For pictures, detailed inventory and contact info. Sealed bids via eamil please. Winner will be notified 2015 09 16, machine will be ready to ship same day. Must be shipped / picked up no later than 2015 10 09. Sold AS-IS / where is, untested, unpowered since received. Comes with H960 rack and 2 side panels. Cheers, -RK -- Robert Krten Visit me at http://www.ironkrten.com

9 years, 4 months

RS-232 Tx / Rx monitoring LEDs?

by drlegendre＠gmail.com

As part of my C-64 RS-232 to M15 60mA CL project, I've put together a simple MAX232 based interface to connect the TTL levels on the C-64 to the standard RS-232 +/- levels. Is there any reason that I can or cannot install LEDs - on either side of the MAX232 converter - to give some indication of line status? Specifically, a pair of LEDs, one each for Tx and Rx lines, to blink / etc. as line status changes and data moves. I don't see any obvious issue - but I can conceive of a situation where it might screw up the line in some way I haven't considered. Comments?

9 years, 4 months

Silent 785 docs?

by jwest＠classiccmp.org

I've got a TI Silent 785 I'm trying to get configured/running. I see docs on bitsavers for the earlier models, but not anything in the 780 series and outwardly they do appear to be somewhat different than the 700 series. My google searches don't return joy either. I'm particularly looking for serial port configuration. Anyone have operators and/or service manual for the Silent 785? J

9 years, 4 months

VT100 preventative maintenance?

by earl＠retrobits.com

Hi all, I have two VT100 terminals. Both of them work just fine. Should I leave well enough alone, or is there preventative maintenance that should be done? For instance, should capacitors be proactively replaced. In general, I'm thinking about things that, if they fail catastrophically, would cause collateral damage. Thanks! - Earl

9 years, 4 months

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test-drb August 2015