test-drb October 2003

test-drb@ccmp.vtda.org

252 participants
500 discussions

by GOOI＠oce.nl

Well, from what I understood from quantum physics, it is *not* possible to know location and speed (spin) at the *same* time. Also when you measure the <thing> (particle) you *influence* its behaviour. Note that I never had any quantum physics course, but this is what I seem to remember from watching the Discovery Channel. Paramount has a technician on their pay role for technical correctness in the StarTrek series. So, when they use the transporter to change matter in energy and then, at an other location, materialise the object/person from energy they have to solve the problem of the "uncertainty principle" formulated by the German (von?) Heisenberg. To make the transporter in a technical way plausible they added the "Heisenberg compensation coils" to solve the above described problem. Now, *how* those Heisenberg compensation coils operate, that's a complete different story ... have a nice weekend all, - Henk. > -----Original Message----- > From: Roger Merchberger [mailto:zmerch@30below.com] > Sent: vrijdag 31 oktober 2003 7:41 > To: General Discussion: On-Topic and Off-Topic Posts > Subject: Re: Is there a physicist in the house? > > > At 22:36 10/30/2003 -0600, you wrote: > > >Heisenberg says we can't know the speed of <thing> and it's > location at > >the same time. > > IANAP (;-) but I would think that for this to be true, it > would have to be > an infinitely short period of time... > > > >What if I concentrate on location while timing <thing> > > > >ie <thing> is at "5" and 1 second later it's at "35" is it > not going "30" > >per second? > >and while it was going 30 per second didn't I see it at 5 and 35? > > 1) Not enough information to form an hypothesis... Is <thing> > going in a > straight line or circle? (I was actually thinking chain > printers when I > read this... > ;-) > > 2) your statement of '30 per second' *assumes* it's at a > constant speed... > what if it's not? It could have started at '20 per second' > and ended at '50 > per second'... > > 3) When you said "see it at 5 and 35" if you meant to append > "At The Same > Time" then it would have to be at two places at once... which > is a totally > different problem... ;-) > > 4) This might actually help: Once you saw it at 35, and using > the time it > took to calculate that it was going "30 per hour," it's not > technically at > 35 anymore, so 1) isn't at that location and/or 2) could have > changed speed > by that time... so the next time you 'saw' it at a new > location (let's say > 35.5) it has either changed speed or location... > > >(note to a real physicist this question is probably meaningless...) > > Note: I'm just a stupid geek... so these answers are probably > meaningless... > ;-) > > Just my 0.000000000002 (wishing physics were required > teaching in school...), > > Roger "Merch" Merchberger

20 years, 6 months

WTB/T: RL02/01, QBUS SMD

by TRASH3＠splab.cas.neu.edu

Pat, if you are willing to wait (until I get to firing it up again), I have at least one and possibly 3 SC02 emulex SMD q-bus disk controllers with manuals. They are hooked to some fujitsu drives (80 MB 8 inch and 240Mb 14 inch). I have to plug them in again and retrieve the data from the drives, and then I am going to deep-six the drives. It's on my list to do so, as I need to clean up, but I have lots going on at that site. It is a research lab at northeastern university, and I only get there a day or two a week. Joe Heck

20 years, 6 months

Rockwell R6765 datasheet?

by dwight.elvey＠amd.com

check out: http://www.htl-steyr.ac.at/~morg/pcinfo/hardware/ interrupts/hard0001.htm#NEC ?PD765 Dwight >From: ard(a)p850ug1.demon.co.uk > >> >> Hi, >> I've just bought a pair of Rockwell R6765 ICs (allegedly clones of the NEC >> 765 Floppy Disc Controller). Does anyone have a datasheet for these ICs? > >Yes, I have a datasheet, and yes they're pretty close to the 765 (I can't >see any obvious differences...). Is there anything specific you need to know > >> I do have a copy of the NEC 765 datasheet, but in true Murphy's Law >> fashion, most of it is unreadable. > >You mean this is _not_ on the web somewhere? It's a very common IC.... > >-tony >

20 years, 6 months

WTB/T: RL02/01, QBUS SMD

by pat＠purdueriots.com

Well, I've tried hooking my RL02 up to a new controller, and it still doesn't turn off the "FAULT" light. Does anyone within a day's drive of Lafayette, IN have a spare that they'd be willing to trade or sell to me for semi-inexpensively? It'd be nice to fix this drive, but I'm not sure if I have the time right now to spend on it... Also, I'm looking for a QBUS SMD disk controller card, if anyone has one for similar terms as the RL0[1|2], except this is small enough to ship if you're willing. As far as trades go, I've got some QBUS PDP-11/VAX hardware, other DEC VAX machines, some DECstation 5000's and a couple of DEC 3000 (Alpha) machines I'd be willing to put up in trade. I've also got a smattering of IBM RS/6000 (Microchannel) hardware. Just tell me what you're interested in and I'll see what I can come up with. Thanks! Pat -- Purdue University ITAP/RCS Information Technology at Purdue Research Computing and Storage http://www.itap.purdue.edu/rcs/

20 years, 6 months

Wyse WY-60 terminals available

by vcf＠siconic.com

I have about 8 Wyse Wy-60 terminals with keyboards available. Most have burn in, though not that bad. They are still visually adequate. One has no burn-in. If anyone's interested, you can have as many as you want for shipping. For the one without burn-in, I'd like 1.2 * shipping. These make great all-around terminals. They're relatively small and compact, modernish with nice on-screen setup features. Contact me privately... -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org [ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] [ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]

20 years, 6 months

AVL Road Runner computer????

by rigdonj＠cfl.rr.com

I stopped at a scrap place today and spotted an AVL Road Runner computer there. It looks similar to a Commie 64 but is slightely smaller and marked Road Runner on the top hump. There was also an external monitor with about a 5" screen marked AVL with it. Also has two external floppy disk drives, both marked AVL. Each drive is full height 5 1/4". Also has an AVL marked "expander" box that's made of metal and about 14" x 12" x 2". The expander box had sockets for the floppy drives, two video sockets and a couple of others that I don't remember. IIRC one video socket with a RCA type and the other was a PL-259. There was also a separate AVL keyboard there. It had a metal back and ends and was similar to the ones used for Kaypros and other early portable computers. It seaparate from the rest of the sysstem so it MAY NOT be part of it but what's the chances of finding parts for two different AVL ssystems in the same location? Everything painted a dark grey color. Does anyone here know what this is? Joe

20 years, 6 months

FA: HP 9816

by rigdonj＠cfl.rr.com

Spotted on E-bay <http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2762638304&category=1247 >. It's hard to find these with the original small keyboard. Most users bought the larger "Nimitz" keyboards. Joe

20 years, 6 months

New member introduction, questions on HP 21XX series machines, reliability and maintainability

by wmaddox＠pacbell.net

Hi, all. I just joined the list. I've had a long-time interest in old computers, and rescued a "straight-8" many years ago when I didn't think anyone else thought of it as anything more than junk. It was at least minimally operable when I obtained it, but I went off to graduate school before I could find any software for it, and it's been in storage at my father's office in Florida for ~15 years now. I hope to move it to my current location in the next few months after a family visit, but in the meantime, I'm looking to acquire another minicomputer from the core memory era, hopefully something slightly more compactly packaged than the (presently rackless) rack-mount "8". After some research, I have settled on the HP21xx line as a good candidate. These seem to be very nice, well-built machines with a reasonable architecture, a good paper-tape BASIC, and a full complement of "blinkenlights". It seems that these machines are actually still used, however, and I've been quoted some pretty steep prices from a nearby dealer in in used HP gear. I'd be interested in comments and advice for a prospective 21xx owner from those on the list who own these machines or have used them. I'm particularly concerned about reliability, since at the price I expect to pay, I want to keep it operating for a long time to come. How difficult and expensive are they to troubleshoot and keep working (say, compared to DEC PDP-8)? How available are contemporary replacements and/or new old stock for the ICs? Are there any proprietary components that are particularly prone to failure or hard to replace that I absolutely must obtain up-front as spares? What about the core stacks themselves? The dealer that I talked to seemed to think these were problematic (though I did not speak with his technicians), while my instinct would be that the core itself (not the driver electronics) would be among the most reliable and stable components, barring visible corrosion damage. Also, any suggestions on places to look for these machines on the cheap would be welcomed. What I'm most looking for is a 2115, but would likely be interested in the somewhat later 2100 as well. Thanks, Bill

20 years, 6 months

Rockwell R6765 datasheet?

by philpem＠dsl.pipex.com

Hi, I've just bought a pair of Rockwell R6765 ICs (allegedly clones of the NEC 765 Floppy Disc Controller). Does anyone have a datasheet for these ICs? I do have a copy of the NEC 765 datasheet, but in true Murphy's Law fashion, most of it is unreadable. Thanks. -- Phil. | Acorn Risc PC600 Mk3, SA202, 64MB, 6GB, philpem(a)dsl.pipex.com | ViewFinder, Ethernet (Acorn AEH62), http://www.philpem.dsl.pipex.com/ | 8xCD, framegrabber, Teletext Seen on T-shirts at NASA: WILL BUILD SPACE STATION FOR FOOD.

20 years, 6 months

AVL Road Runner computer????

by Innfogra＠aol.com

AVL Roadrunners are controllers for multiple slide projector shows. I have only seen standalone ones like the commodore type you mentioned. Since this one had video it is probably for adding or switching video in a multimedia show. That thing is probably Z80 or 8 bit controlled, maybe STD bus. All of the pieces go together. This must have been a high end system, probably worth saving. IIRC AVL stands for Audio Video Laboratories.

20 years, 6 months

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test-drb October 2003