test-drb April 2001

test-drb@ccmp.vtda.org

251 participants
669 discussions

CP/M for AES 7100/Lanier Dedicated Word Processor ???

by claudew＠videotron.ca

Hi I picked up one of these AES/Lanier 7100 a few weeks ago. It's in near perfect shape and boots to what looks like a word processor. The WP software thats in there right now is on 5 1/4 hard sector disks... I have heard rumors that a version of CP/M was available for this machine. Anyone ever heard or seen this or would by any chance have a copy? Claude Canuk Computer Collector http://computer_collector.tripod.com

23 years, 2 months

Chips and SBCs(Re: Technico (Re: TI Minicomputer?)

by pete＠dunnington.u-net.com

On Apr 16, 8:35, Ethan Dicks wrote: > Some of > that is the actual artwork for the Elf-II PCB. I know I can buy iron-on > transfer paper, but I've never made a double-sided PCB at home, only > single-sided (and then, only with rub-on transfers). Has anyone out there > ever made double-sided boards at home? Yes, plenty of times. I use tracing film, but I suppose you could use transfer paper if you're careful (I've never tried it). I make sure I mark one of the corners and one edge of the layout exactly in registration on both layers. When I expose the PCB, I make sure the raw PCB is exactly lined up on that corner and edge for both exposures (both sides). It helps if the raw PCB is carefully cut! Transfer paper might actually be easier if oyu can do both sides at once, but you'd have to make sure it didn't stretch or warp. -- Pete Peter Turnbull Network Manager Dept. of Computer Science University of York

23 years, 2 months

VaxStation 2000 PSU info needed

by ajp166＠bellatlantic.net

To start with the switcher in question is 1987 design maybe earlier. The MV2000 was available in 87 or 88 if memory serves. And even if I'm wrong it's very definatly pre1990. Dec often used standardized designs for years despite technology. Regarding you comment on rotating technology.. your wrong. The biggest problem is that often the older technologies were kept available too long or in service too long. Add to that usually at least 50% of the rotating memory was not even DEC to start with. Look at the DEC designed products. Allison ------Original Message------ From: "Richard Erlacher" <edick(a)idcomm.com> To: classiccmp(a)classiccmp.org Sent: April 16, 2001 3:03:26 AM GMT Subject: Re: VaxStation 2000 PSU info needed Back in the early '80's it wasn't uncommon for switchers to malfunction, or, if designed somewhat better, to fail to function at all, if no load was present. This is consistent with DEC's practice of putting out 10-year old technology in its "current" products. Their rotating memory products were always at least one, and often three, generations behind the "current" generation in other makers' products. That ensured maximal profits for DEC shareholders and maximal bonuses for their execs, though it also ensured last-generation performance or less for their users. Dick ----- Original Message ----- From: "Brian Chase" <bdc(a)world.std.com> To: <classiccmp(a)classiccmp.org> Sent: Sunday, April 15, 2001 2:01 PM Subject: Re: VaxStation 2000 PSU info needed > On Sun, 15 Apr 2001, Richard Erlacher wrote: > > > Is anbody intimate enough with the VaxStation 2000 to provide a couple > > of details? Here's the deal: > > Not really intimate with them, but I have used them to run NetBSD/vax and > Ultrix. > > > I snagged a VaxStation 2000 box some time back, mainly for the PSU. > > It turns out that it has a couple of lines, on the 9-pin MOLEX main > > power output connector, the purpose of which is not clear. There's > > one that seems to float at around -6 Volts DC, and another that floats > > at high-impedance, yet, when the one at -6 is pulled to 0 (gnd) > > through a resistor, the previously floating one suddenly has 9 volts > > or so. Do these have a specific purpose that might serve some need > > I'm likely to encounter, or are they just for the DEC folks' features? > > Is there any way to capitalize on them, or should I just leave them > > alone? All I'm after is fairly normal power output, with the added > > benefit of a fan and switch. The +5 and bipolar 12's seem to work > > fine. Spec's would be handy too, e.g. how much current can be drawn > > from each of the supplies and, perhaps from all of them at once? > > I think (I'm not positive) this may be related to the nature of the power > supply. I've not actually used them for anything but powering the > components which normally make up a VAXstation 2000. They do have some > interesting qualities, the main one being that they don't work right > unless they've got a load on them. > > I've made the mistake of trying to run one diskless--which doesn't work. > As soon as you add a disk drive, then the system goes through it's power > up sequence without problem. DEC did make a diskless version of the > VS2000, but it had a big resistor board that plugged into the internal > drive power cable. > > I'm sure someone here can address the actual reasons why the power supply > behaves like this. I think it's a trait of older switching PSUs. But > hopefully my "systems guy" observations provide some useful clues. > > -brian. > --- Brian Chase | bdc(a)world.std.com | http://world.std.com/~bdc/ ----- > Being an open and honest guy, in the big "Occupation" box in the center > of the sheet, I had written the same thing that's on my business cards. > "Internet Legend". -- K. > >

23 years, 2 months

Tektronix 8501 Data Management Unit

by jm_chu＠hotmail.com

An HTML attachment was scrubbed... URL: http://www.classiccmp.org/pipermail/cctalk/attachments/20010416/06c455fc/at…

23 years, 2 months

NeXT Cube Computer Back Cover

by reyes＠orion.ae.utexas.edu

I have a NeXT Computer cube. On the back of the Cube it has a NeXT logo and under the logo is in bold "Computer". I was told that some cubes have instead of "Computer" either "Cube" or "Turbo". Is this true? Did the text on the back of the NeXT cube change over time? Can anybody point out any other differences on the back cover of the NeXT cube. Reuben

23 years, 2 months

(fwd) Computer collection for sale in the UK

by bill_r＠inetnebr.com

If anyone is interested, please contact this individual directly. I have no connection with this except that he found my address on my "classic computers" web page. On Sun, 15 Apr 2001 18:09:07 +0100, "gen" <gen(a)webline.plus.com> wrote: >Hi there > >I got your email address from the internet. > >I have a substantial UK collection of 'antique' computers, mostly 'first >editions' of systems such as Apple, IBM, Sirius, Apricot, Macintosh, Epson, >etc. These are not old and used, they are in pristine condition in their >original boxes with manuals, software & literature. Would you know of >anyone >interested in buying it? I am based in the UK. > >Regards > > > > > > > Bill Richman bill_r(a)inetnebr.com http://incolor.inetnebr.com Home of Fun with Molten Metal, technological oddities, and the original COSMAC Elf computer simulator!

23 years, 2 months

Kim / Commie keypads

by ajp166＠bellatlantic.net

Foo, mine was used, is used and works. It was dirty enough to require a trip through the dishwasher though. It wasn't to hard to open and wipe the contacts afterwards. The RS pad (special catalog item likely not their manufacuture) would work as would many others. Maybe I'm just more resorceful that others. Either that or rather that grouse about it I just do it. Allison ------Original Message------ From: "Richard Erlacher" <edick(a)idcomm.com> To: classiccmp(a)classiccmp.org Sent: April 16, 2001 2:14:29 AM GMT Subject: Re: Kim / Commie keypads Well, in that case, since the user manual is posted at the URL included in the original post, and you'll see it's not the "usual" scanning matrix being a 7x3 or some other obtuse pattern, and not easily physically replaced with a run-of-the mill matrix keypad. Since you have a KIM-1, you know what the size is, and you know what the Radio Shack product is. If the RS product would fit in place of the original perhaps you could indicate that. If your keypad is still working, it's clear you haven't used it much. Just let us know ... don't equivocate. Putting a Radio Shack product on a KIM-1 kind-of makes my skin crawl, but if it will fit closely as a replacement for the original, and if that's what's wanted, why not? The designers did provide access to the scanning inputs, however, so an external and much more comfortable and durable keypad could be put in place with little hassle. If the desired solution is to use a serious keypad the externally applied replacement can be of whatever size is desired. It occurred to me over the Easter dinner at Mom's that one could use the top segment of the capacitive switches by situating them over a perfboard with wire leads soldered to it. The somewhat conductive pad on the lower surface of the key will close the circuit just fine if a bit of aluminum foil is rubber-cemented to its conductive surface. If it seems I don't know what sort of switches are in a PC keyboard, that's because I don't, BTW. The only PC-targeted keyboard I've disassembled has been that MicroSwitch model. That should, however, make the surplus PC-keyboard's switches useable. They're mechanically and ergonomically decent enough. Dick ----- Original Message ----- From: "ajp166" <ajp166(a)bellatlantic.net> To: <classiccmp(a)classiccmp.org> Sent: Sunday, April 15, 2001 4:16 PM Subject: Re: Kim / Commie keypads > From: Richard Erlacher <edick(a)idcomm.com> > >If that were true, this entire thread would not have occurred. The > problem with > >most of these matrix keypads in a single, solid, monolithically-molded > assembly > > > NO it's someone that hasn't an idea how or what it is. RS sells a > universal > keypad kit (not usually stocked in the stores) that would work fine. One > from a calc would also work. If someones is doing museam restore that > would be harder. > > Besides I obviously don't know anything about it even though I have a > KIM-1 > in working condition. > > Allison > > > > >

23 years, 2 months

Collection list (just for phun) and wants

by RCini＠congressfinancial.com

Hello, all: Just to throw my collection list into the ring. I'm just listing machines only. I have accessories and software to go with them. Apple: II+, III (with ProFile hard drive), FatMac (with floppy-based hard drives), SE/30, IIci, IIgs, Mac Portable Commie: 4032, 8250, 2031lp, 1541, 1515, 1525, VIC20, C64, KIM-1 (3!) Digital: Complete 11/34a system with lots of spare boards (2 RK drives and one RX02), MicroVAX-I Tandy: Model I (4k and 16k), EIs, complete Model 100 with DVI IBM: Original PC with expansion chassis (and 20mb hard drive), Datamaster (and spares) NorthStar: Horizon and lots of boards. Never able to get it to work. Other: AIM65 Rich

23 years, 2 months

CP/M for AES 7100/Lanier Dedicated Word Processor ???

by claudew＠videotron.ca

23 years, 2 months

Latest Acquisition: Imlac PDS-1D

by uban＠ubanproductions.com

Opps, I made a typo on the URL... Please try this one. http://www.ubanproductions.com/imlac.html --tom >Well, I said that I would put up some more pictures of one of my Imlacs >a couple of days ago, but I got delayed a bit, so here they are now: > >http://www.ubanproductions.com/imlacs.html > >--tom

23 years, 2 months

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test-drb April 2001