test-drb January 2002

test-drb@ccmp.vtda.org

303 participants
1201 discussions

Searching for old DEC 12V frontpanel bulbs

by pete＠dunnington.u-net.com

On Jan 29, 6:22, Ethan Dicks wrote: > > Sounds like a standard T1_1/2 (about 3/16" diameter) or T1_3/4 (about > > 1/4" diameter) wire-ended bulb. There are still a few companies that > > make them. > > If I had to guess, I'd go with the 1/4" diameter. These are larger > than PDP-8/L or RL01/RL02 bulbs. The bulbs in RL02s aren't "wire-ended", they're 14 volt T1_1/2 "wedge base" bulbs. Wedge base bulbs are common in motor vehicles. Unfortunately 14V is hard to get (except in T1_3/4 size), but I used 12V ones in my RL02s -- they're just a bit brighter. Farnell part no 328-960, made by SLI (for whom someone posted a URL). I got some low-current 12V ones made by VCH as well. > > > If DEC was underfeeding these bulbs to extend their life, I would > > > expect that the bulb should be rated at 14V-16V. > > > The Farnell catalogue lists a few that are 14V. The correct bulbs for my > > RL02 drives are 14V, fed from a 12V supply, as you say. > > >From a conversation with Jeff Russ, a PDP collector from Indiana, it > seems that the bulbs are 28V, underfed to 12V-14V. He found some > similar bulbs at a hamefest once, but they drew double the current > of the originals. Dunno about bulbs for a PDP-8 but spare RL01/2 bulbs I got from DEC are definitely 14V. -- Pete Peter Turnbull Network Manager University of York

22 years, 5 months

Packrat genome project questions

by r.stek＠snet.net

The first computer I used was in '65 - I took a summer course at Stevens Tech and learned FORTRAN on an IBM 1620; I think it was a 7090 which they had also, but only the real geeks could use it, and I wasn't among them. Then in '66 I learned (a little) of 1401 AutoCoder. The freshman year at RPI it was the 360 model 50 - still with punched cards. At the risk of starting a definitions war, I got a TI SR-52 for statistics and games (still have it). Shortly thereafter I put together my Sol-20 (2 weeks of soldering everynight after dinner, and 6 weeks to find the two reversed diodes which prevented it from working)- still have it. I had a RS Model I very briefly - don't have it. Then it was on to a North Star Horizon - still have it, a Morrow Decision 1 (sold it but I found a replacement), and then a PC XT clone and descendents - the only ones in this lineage I still find "cool" are my HP 200LX and Poqet. Of course I used many other - Cromemco, various Rat Shacks, Osborne 1, KayPro, Apple II, Sinclair, PETs, VICs, C-64's, Atari 400-800, TI, Adam, etc. I have since added to my collection an IMSAI, CompuPro, and Ithaca InterSystem, a Lisa 2/5, plus some smaller systems like Ohio Scientific Challenger, Apple II+, Epson PX, KayPro 10, Osborne Executive, Sinclair kit, Mac 512, Color Classic, et al. Sometime in the next xx years I will finish putting together my Mark-8 repro with a TV typewriter. And I know it was a lousy machine, but since I ALMOST bought one instead of my Sol, I'd still like an Altair 8800 (but I don't see many around in my price range lately <g>). Steve Ciarcia has suggested that someday he MIGHT make me a present of his Digital Group, but I really lust after his Scelbi (and he's smart enough not to leave it to me in his will - how tempted I might be... <g>) Bob Stek Saver of Lost Sols

22 years, 5 months

New line of VAX 6000s!

by vaxzilla＠jarai.org

Wow, the design of this baby is even more revolutionary than Apple's new iMac-- http://www.vax.co.uk/ My guess is the black hose coming out of the side is used to circulate some sort of coolant to the process from overheating. -brian.

22 years, 5 months

New line of VAX 6000s!

by pete＠dunnington.u-net.com

No, it's for the holes... On Jan 30, 9:42, Ben Franchuk wrote: > Nope you have it all WRONG, it is the Bit Bucket option > for all the loose 0's and 1's found when a program crashes. > They can be rather hard on the carpet, generate static electricty > and slow programs down to a crawl. Paraphrasing slightly from Matthew Skala on alt.folklore.computers: All perfectly correct, except you forgot to mention: In modern implementations, data sent to the bit bucket are destroyed by combining the binary 1s and 0s in the Neuman reaction [1], (eqn. 1) 1#0 -> 2p where # is the logical annihilation operator, and p is Plonk's Constant, 0.172 J [2]. The resulting heat is fed back to the power supply and used to replace the voltages of the destroyed bits. Unfortunately, this reaction requires equal amounts of 1 and 0 bits. Modern PCs, especially those used in desktop publishing by unskilled personnel, often generate an excess of 0 bits corresponding, for example, to whitespace in printed documents. These unwanted zeros can accumulate into plaques on the system bus, causing a reduction in bus rate and eventual total catastrophic system seizure [3]. Current techniques involve breaking the zero and unrolling it into a one. See Figure 1, below. | _ __ \ | / \ \ \ | | | ---> | ---> | ---> | \_/ __/ / | / | | Figure 1. Unrolling a zero. (15000x electron micrographs courtesy Pugwash Memorial Hospital Research Department) This 1 can be annihilated with another extra 0 by equation 1, leaving to be disposed only the hole from the middle of the unrolled 0. Holes are accumulated in a special Hole Accumulation Hemisphere (HAH) at the bottom of the power supply filter capacitors, until they can be removed by a qualified service technician. Used holes are currently being re-refined, cast in larger units, and sold to the doughnut industry [4]. It is important that beginning users not attempt to empty their own HAHs. The accumulated holes, in addition to being invisible, are an environmental hazard and should not be placed in the normal office waste stream. There have been cases of holes getting into important documents [5], or merging to form chunks large enough for personnel to fall in [6]. Uncontrolled holes are a very real danger and must be taken seriously, especially in critical government and medical applications [7]. References [1] Neuman, A.E. Safe, secure destruction of data. Journal of Data Erasure Technologies. 5:17, 23-69. [2] Plonk, Anvilsko. Heat value of data: a retrospective. Home Heating News. 65, 19. [3] Kevorkian, J. Case studies in busclerotic CPU arrest. Journal of Systems Rescusitation. 2:12, 143-145. [4] Dibbler, C.M.O.T. An alternative to traditional hole suppliers. Baking Quarterly. 1996:3, 7-17. [5] Kaputnik, H. I ha no l ers nd must sc . Writer's Weekly. 28:42, 94-98. [6] Eating Corporation of America. Unpublished memo, subject: "Where the f--- is Waldo?" [7] Rubble, B. The 18 1/2 minute gap: Another view. -- Pete Peter Turnbull Network Manager University of York

22 years, 5 months

Sharp CE-515P - need more pens! (also: Multitech MPF)

by philpem＠btinternet.com

On Tue, 29 Jan 2002 at 21:19:35 -0500, Joe <rigdonj(a)cfl.rr.com> wrote: > At 10:03 PM 1/29/02 -0000, you wrote: > >Hi, > > A few of you might remember my Sharp CE-515P plotter. Well, my pens are > >almost completely devoid of ink and I need more. I know All Electronics sell > >a pack of 4x black pens, but I'm after the four coloured ones (blue, green, > >red and black). I'd really like to keep this thing running, but if I can't > >get the pens then I'm afraid I'm going to have to relegate it to the > >cupboard... > > I bought both black and colored pens a few years ago. I THINK I got them > from Goldmine Electronics. You should check with them. Besides their prices > are a lot better than All's. The same Goldmine Electronics whose website is located at www.goldmine-elec.com ? Hmm... I've just had a look in the "Computer Parts" section and there's no sign of any plotter pens... If Goldmine do sell them, can someone PLEASE tell me what catalogue page they're on? Thanks. -- Phil. philpem(a)bigfoot.com http://www.philpem.btinternet.co.uk/

22 years, 5 months

Amstrad 1512DD - For Sale

by lyn40＠bigfoot.com

We have a Amstrad 1512dd, monitor, keyboard, mouse, dmp3000 printer with loads of paper, dust covers plus original Gem software & about 40 5.25" discs. System used approx 10 hours since purchased new in 1987. Mint Condition and perfect working order. All offers considered. L.Suffolk --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.314 / Virus Database: 175 - Release Date: 11/01/02

22 years, 5 months

More HP1000's, and bootstrapping old systems in general.

by steven_j_robertson＠hotmail.com

Did a little research and found the FST description at: http://www.hp.com/products1/rte/tech_support/documentation/documentation1/9… Not sure if I'll have time to tackle this or not. If anyone else decides to write an application to decode the data, I'd be interested in the results. See ya, SteveRob >From: "Bill McDermith" <bill_mcdermith(a)yahoo.com> >Reply-To: classiccmp(a)classiccmp.org >To: <classiccmp(a)classiccmp.org> >Subject: Re: More HP1000's, and bootstrapping old systems in general. >Date: Fri, 18 Jan 2002 10:39:08 -0700 > >The manuals are available from HP, and I believe that the format for these >files are in the back of the backup manual... I'm not sure if the manuals >are on the interex site, but if you go into the RTE section of hp support, >you can download them there... > >Bill >----- Original Message ----- >From: "Bob Shannon" <bshannon(a)tiac.net> >To: <classiccmp(a)classiccmp.org> >Sent: Thursday, January 17, 2002 5:38 PM >Subject: Re: More HP1000's, and bootstrapping old systems in general. > > > > Hmmm, does anyone on interex understand this format? > > > > Bill McDermith wrote: > > > > > >From the hp users group, interex, you can get the RTE-6 OS, but only > > > in fst format, which is some sort of tape dump/backup format that I > > > cannot (yet) decode, so I'm not sure how to build a loadable system... > > > The manuals are also available... If anyone knows how to decode >...snip...snip...snip... > > >_________________________________________________________ >Do You Yahoo!? >Get your free @yahoo.com address at http://mail.yahoo.com > _________________________________________________________________ Join the world’s largest e-mail service with MSN Hotmail. http://www.hotmail.com

22 years, 5 months

DesqView

by csmith＠amdocs.com

> -----Original Message----- > From: Cini, Richard [mailto:RCini@congressfinancial.com] > Right site but clicking all download links produce "page not > found" errors > here. Ok, this one seems like it might work: http://www.chsoft.com/dv.html Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '

22 years, 5 months

New line of VAX 6000s!

by Robert_Feldman＠jdedwards.com

I've allways liked the tag line quoting Ernst Jan Plugge: "The day Microsoft makes something that doesn't suck is probably the day they start making vacuum cleaners." Bob -----Original Message----- From: Ethan Dicks [mailto:erd_6502@yahoo.com] Sent: Wednesday, January 30, 2002 9:57 AM To: classiccmp(a)classiccmp.org Subject: Re: New line of VAX 6000s! --- Brian Chase <vaxzilla(a)jarai.org> wrote: > Wow, the design of this baby is even more revolutionary than Apple's new > iMac-- http://www.vax.co.uk/ My guess is the black hose coming out of > the side is used to circulate some sort of coolant to the process from > overheating. Wow! A 6130! They fit three processors in that little enclosure... must not be XMI ;-) (Yes... I've heard of the VAX company in England... the joke going around over a decade ago was "Nothing sucks like a VAX"). -ethan __________________________________________________ Do You Yahoo!? Great stuff seeking new owners in Yahoo! Auctions! http://auctions.yahoo.com

22 years, 5 months

1520 plotter (was RE: Your VIC-20 is worth $300!!! W@W!)

by Adrian.Graham＠corporatemicrosystems.com

> -----Original Message----- > From: Ethan Dicks [mailto:erd_6502@yahoo.com] > Sent: 29 January 2002 14:15 > To: classiccmp(a)classiccmp.org > Subject: 1520 plotter (was RE: Your VIC-20 is worth $300!!! W@W!) > > "tatty polys"? It sounds British, but I have no idea what it is. Someone else has already answered this, but from my point of view it means battered packaging. (or "ebay mint") > I've just been trying to locate replacement gears for my 1520 - So > far, my measurements have yielded the following... Which is why I started breaking this one for spares in the first place since the guy asking wanted a few spares from the printer. a

22 years, 5 months

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test-drb January 2002