test-drb October 2002

test-drb@ccmp.vtda.org

261 participants
654 discussions

OT: Loss of the Scorpion, was Re: Naming Computers [was: A Momentous Decision]

by xds_sigma7＠hotmail.com

I also recommend going to the Chicago Museum of Science and Industry, and going through the U-boat... My god, what a horrid place to spend any length of time! And I don't want to think about being submerged... I also would recommend going to the HMS Belfast in London, 6" gun WWII light cruiser.. Will J _________________________________________________________________ Choose an Internet access plan right for you -- try MSN! http://resourcecenter.msn.com/access/plans/default.asp

21 years, 8 months

HP1000 Card Edge Connectors

by geoffr＠zipcon.net

at 03:12 AM 10/25/02 -0500, you wrote: >I was checking my inventory of unusual cables to see if I had one of >these, and although I couldn't find one, I came across a couple of other >unusual cables. I put up photos and information here: > http://www.techmonkeys.org/~tothwolf/cables/ > >If anyone has an idea what they might be, speak up so I can tag and >inventory them properly... > >-Toth the top one looks like a commodore vic20/c64 to serial cable (If my memory is still working right....) it should be 10 double sided pins IIRC on the 'card edge' end... the bottom one looks like a winchester extender, used for some Routers and NT1's

21 years, 8 months

HP1000 Card Edge Connectors

by glenslick＠hotmail.com

I checked with one of the HP1000 dealers on the net and was quoted $100 for a 12966A serial cable. I guess that would be either a 12966-60004 or a 12966-60006 for standard 25-pin terminal / modem cables. Now I'm glad I recently picked up an unused 12566C off of eBay complete with the 48-pin connector for just over $20 delivered. When that arrives I should be able to use that connector to build a serial cable for the 12966A. Is there a scan of the 12966A manual (12966-90001) on the net somewhere? I've found a large selection of other HP 1000 manuals, but not one for the 12966A. I did google up a 2 year old message from Frank on this list with card edge signal descriptions so I at least have that. -Glen >From: "Glen Slick" <glenslick(a)hotmail.com> >Reply-To: cctalk(a)classiccmp.org >To: cctalk(a)classiccmp.org >Subject: Re: HP1000 Card Edge Connectors >Date: Wed, 23 Oct 2002 11:33:05 -0700 > >I think the necessary connector is a dual row 48 contact 0.156" spacing >card edge connector. I'll have to see if I can find a source. I think >some place like http://www.edac.net would let you specify such a connector, >but actually buying some in low quantities might be a different story. > >-Glen > > >>From: "Will Jennings" <xds_sigma7(a)hotmail.com> >>Reply-To: cctalk(a)classiccmp.org >>To: cctalk(a)classiccmp.org >>Subject: Re: HP 2647A / F Terminal & HP1000 >>Date: Wed, 23 Oct 2002 10:52:43 -0600 >> >>Closest I ever came to cables was the hacked-off ends as gold scrap : ( >> >>Will J _________________________________________________________________ Surf the Web without missing calls! Get MSN Broadband. http://resourcecenter.msn.com/access/plans/freeactivation.asp

21 years, 8 months

Micom 2000

by wh.sudbrink＠verizon.net

Well, maybe I just scored an ebay bargan. I just "bought-it-now" for $30 plus shipping. A quick web search seems to indicate that this is an early (1975?) 8080 based small business computer. There is an old classiccmp thread with a few general messages about this box. Anybody want to talk about it... what software it runs, etc. Did I just throw $50 away? Bill

21 years, 8 months

ET-3400 Revision Questions

by patrick＠evocative.com

Guys, I just got an ET-3400 that was partially built. On average, the construction seems to be fairly good. I haven't yet plugged the rascal in, I'm still doing a visual checkout and comparison to instructions and schematics, and trying to find the point or points at which the kit has remaining steps. Mechanically it seems to be in great shape: the labels for the case haven't been applied, and the case is completely unscratched. Soldering is generally good, but flux hasn't been removed so it looks untidy. The keys still have the thin plastic film over their caps, and it's obvious that this unit has had little if any use. Perhaps the builder had a problem and wasn't able to diagnose it, I don't know. I have a manual with schematics, but it's apparent from inspection that the manual refers to an older revision (part numbers different, parts changed or absent, etc.). The main board is part number 85-2712 (-2). Unfortunately, I don't have the x-ray views of the board, and the component side is completely covered with a white plastic mask that carries various labels and graphics, so traces on that side are all but invisible. Before I break out the probe, I've got a couple of questions, for those who may know: The 6800 in the schematic is a 6802 on the live unit, and the 6875 in the schematic is absent altogether, and there's no trace (no pun intended) of a location for it. This seems to make sense; the '02 has its clock generator on board, correct? Where is its 128 bytes of RAM mapped? There are also two 2114's on this board, rather than two 2112's and two empty sockets for additional 2112's. There's a jumper soldered between U4 (a 74126) pin 5 and the nearest resistor (part of the 8-LED assembly). Not on the schematic, but it seems like it quite possibly could be a pull up or down (pin 5 is an input to a tri-state buffer, pin 6 is the output to the DBE signal on the MPU, at least, according to the schematic I _have_). Again, I can't tell easily in this area of the board because the component-side traces are covered with the white plastic mask. The ROM is 444-364, so I suspect the source listing in the manual I have (for ROM part number 444-17) won't nearly cut it and routines have probably moved. Does anyone have a listing of this ROM they'd be willing to share? IC1 is listed as a 'LS241 on the schematics I have, but there's a 'LS240 in the socket. I can't visually verify that the change is appropriate, or just a bad substitution by the builder, because the component-side traces are covered by that white mask. It seems plausible that Heath would, for whatever reason, decide to invert the sense of the lines buffering the eight binary display LEDs (not the 7-seg displays on the right, the eight FLV117s on the left), and this would be an appropriate substitution. Of course I can quickly find out with a logic probe or some of Heathkit's infamous "short wires", but I was just wondering if anybody knew for sure? Does anyone have a GIF or JPG (or other format) of the x-ray of the main board (even a newer or older revision), or a copy of the "Illustration Booklet" that they'd be willing to share? For that matter, does anyone have a copy of the manual for this (or near) board revision? The manual I have is from Raymond Sarrio, and it was listed on his site as the Illustration Book, but it turned out to the Manual (I'm going to contact him as well). I'm happy to buy/trade... Thanks! --Patrick

21 years, 8 months

Fw: Sign of the times :(

by rschaefe＠gcfn.org

> In news:3DAC9616.5EB1C69C@pacbell.net, yi ge mei you wei ba wrote: > > > Looks like california plates, but where ? I'd go grab it for you > > if I knew where it was .... no street signs in the photo :-) > > Area Code: 818 > Prefix: 762 > Location: North Hollywood > > Well this is as close as I can peg it. Wish someone would salvage it. In reference to: http://216.102.153.252/sgi.jpg For the graphically or bandwidth challenged, it's an Onyx sitting beside a dumptser. Possibly a troll, but if I was withing a half-days' drive I'd spend the weekend driving sidestreets to be sure... Bob

21 years, 8 months

FW: CP/M and NEC PC8001A items available

by dancohoe＠oxford.net

This didn't get on the list first time around so here it is again. Recently I found someone (thank you Joe!) who had a bunch of Z-80 stuff including Televideo TS803's, Xerox 820-II's etc. I brought quite a lot home, but he still has some items that he values highly. He apparently needs to move soon and is short of cash. The things I got from him were in excellent condition. He's located in western New York state. I've tried to help him out and if necessary, could store stuff for someone. If you email me off-list, I can give you his address. regards, Dan Cohoe Here's what he sent me the other day: > I have several items left to sell: > > 4 NEC PC-8001A computers and a few printers with 4 boxes of > assorted hardware and software. > > Note: Only 3 NEC Monitors (Green). However, to make > up for the missing monitor I have bundled with these computers > 2 AMDEK (Amber Monitors) (Condition unknown) > 1 AMDEK II Color Monitor (that needs minor repair) > 1 Apple Monitor III (was working when I last used it. > > Note: One of the mini disk units seems to work when it wants to... > > Also, I have about seven boxes of Z80 and CP/M related items: > > 1) a few TRS-80 Mysteries decoded books > > 2) Tons of CP/M Books (assembler/database/communications) > > 3) Kilobaud Magazines > > 4) Digital Research CP/M Plus manuals > > 5) Much more > > I know that one of these boxes contains the original LDOS > manual with LDOS related magazines.... (still need to find the > box...it's hidden here somewhere...) > > Brian >

21 years, 8 months

Looking for CRT tester/rejuvenator

by dwightk.elvey＠amd.com

>From: "Claude.W" <claudew(a)videotron.ca> > >Hi > >Looking for a "recent has possible" CRT tester/rejuvenator to do work on >several older terminals, monitors and other equip with CRTs I have around >here... > >Borrowing the high $ unit from work is not good for me....Carrying large >monitors into work is not practical... > >Will trade or $s. > >Claude >http://computer_collector.tripod.com > > Hi They can be tested in place. Most rejuvenators just run the filaments at about 1.5X to 2X the voltage while the rest of the voltages are at zero. You can do this with a bench power supply. Dwight

21 years, 8 months

Even stranger classic software

by jpl15＠panix.com

In the late 70s I remember seeing a tiny little ad in the back sections of Byte for a program for Passover. You plopped your Apple ][ down on the table next to the Charoses and roast lamb and wine - and the damn thing stepped you thru the Seder, songs and all. "Daddy - why on this night do we have our computer on the dining room table, instead of the desk? Daddy - why on this night are all our relatives and guests dying from hunger because you can't get a disk to read?" ;} It was a stunning concept - and right then I began to formulate the cynical observation that *some* people have way too much time on their minds... Cheers John

21 years, 8 months

Looking for CRT tester/rejuvenator

by dwightk.elvey＠amd.com

>From: jpero(a)sympatico.ca > >From: "Dwight K. Elvey" <dwightk.elvey(a)amd.com> >Subject: Re: Looking for CRT tester/rejuvenator >To: cctalk(a)classiccmp.org >Reply-to: cctalk(a)classiccmp.org >Date: Thu, 24 Oct 2002 13:53:02 -0700 (PDT) > >>From: "Claude.W" <claudew(a)videotron.ca> >> >>Hi >> >>Looking for a "recent has possible" CRT tester/rejuvenator to do work on >>several older terminals, monitors and other equip with CRTs I have around >>here... >> >>Borrowing the high $ unit from work is not good for me....Carrying large >>monitors into work is not practical... >> >>Will trade or $s. >> >>Claude >>http://computer_collector.tripod.com >> >> > >Hi > They can be tested in place. Most rejuvenators just run the >filaments at about 1.5X to 2X the voltage while the rest of the >voltages are at zero. You can do this with a bench power supply. >Dwight > >Another reason for having rejuvenator it has ablitity to test >emissions and leakages (short), also can remove those shorts as well >besides just heating the heater HOTTER. You are right but it is still the brightness of the screen that counts in the end. Measured emission is only part of the end result. Tired phosphors can't be measured without a photometer or the eye. Shorts can be opened the same way. Charge a large capacitor and hit it to to short. Again, a cheaper way. > >Secore brand is very good, get used one instead to keep cost down, be >prepared for sticker shock. Your best bet is buy up new TTL monitor >(mono) and stick the new tube into your old terminals is cheapest. > >Otherwise for color CRT is same from used monitor except have to >spend lot of time convergencing them. Convergence is an art. Dwight > >Cheers, > >Wizard >

21 years, 8 months

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test-drb October 2002