test-drb September 2004

test-drb@ccmp.vtda.org

268 participants
648 discussions

by jec＠jcosper.com

>Heathkit Manual for the Memory and Input/Output Accessory for the ET-3400 >Trainer, Model ETA-3400, part number 595-2271, copyright date 1979, 95 >pages. > > If anyone has the manual (not sure of its exact title) describing the >modifications necessary to connect an ETA-3400 to an ET-3400, please email >me on or off-list. > > Paul Pennington > Augusta, Georgia > Greetings, Here is a list of the manuals I have: Microprocessor Trainer ET-3400 part number 595-2021-06, copyright date 1977 113 Pages + 3 set Foldout + "price list 10/20/80". Memory and Input/Output Accessory for the ET-3400 part number 595-2271-01, copyright date 1979 95 pages. Memory Input/Output Accessory ETA-3400 (Assembly) part number 595-2170-03, copyright date 1979 57 Pages. + 1 set Foldout. Modification Kit for the Heathkit ET/ETW-3400 and 3400A Microprocessor Trainers Model ETA-3400/EWA-3400. part number 597-1954-02, copyright ???? 21 Pages. I can scan these if there is interest in them. Later, James.

20 years, 3 months

Heathkit ETA-3400 Modifications

by paulpenn＠knology.net

We join this program already in progress: ----- Original Message ----- From: "Jack Rubin" <jack.rubin(a)ameritech.net> To: "'Paul A. Pennington'" <paulpenn(a)knology.net> Sent: Monday, September 06, 2004 9:11 AM Subject: Heath ETA-3400 manual > Paul, > > Just to clarify, I dug out my ETA-3400 Assembly manual (595-2170) this > morning. The last paragraph on p. 39 states: > > "This completes the 'Initial Tests' of your Memory I/O Accessory. Set > the Memory I/O Accessory aside and proceed to the ET-3400 Trainer > Modification Kit. Then return to the 'Final Assembly and Operational > Tests' in this Manual." > > The contents and implementation of the Modification Kit are the big > mystery here, especially since it's not called out in the parts list. > I'm also lacking the pictorial booklet (large foldout) for the ETA-3400; > maybe it's covered there. If you have the pictorial booklet, I'd sure > appreciate a copy next time you go to Kinko's (hopefully they can handle > the oversize pages). > > Jack Paul wrote: >> For example, I just picked up a Heathkit >> ETA-3400 expansion box for my ET-3400, a Motorola 6800 >> trainer. I got some of the manuals with it but I'm missing >> others. I need the instructions for modifying the ET-3400 >> Trainer to attach the ETA-3400 Expansion, for one. Jack again: > If you find that manual, I know several folks who would be interested in > it - especially the pictorial section! My understanding is that the > "Heathkit" people are only selling copies of the old manuals and I don't > know if they provide the foldouts. I haven't purchased directly from > them - I came close on some of the H8/H89 stuff but ended up finding > "real" manuals for everything I needed, except the ET-3400 mods. I have > a siamesed unit (trainer + expansion) so I suppose we could swap a few > pix and reversed engineer the connection without too much trouble if you > can't find the manual. > > Jack

20 years, 3 months

Keyboards & Conductive Rubber

by dave04a＠dunfield.com

Hi Guys, I'm trying to revive a keyboard (integrated into a vintage computer so it's kinda important) - this is the kind where there's a PCB with lots of "pads" in the scanning matrix, and the keys push a little pad of "conductive rubber" down onto the PCB pads to make the connection. Several of the keys on this keyboard require excessive pressure to make contact - I've tried cleaning the pads, and (gently) the surface of the rubber, however it appears that the rubber has increased in resistance. The good keys measure 200-300 ohms from one end of the conductive rubber pad to the other with only mild pressure - the bad keys measure 5k-10k unless you really squeeze them - under pressure they drop to 1k - 2k, which appears to be barely enough to trigger a detection. Anyone know what the failure mode is? I though perhaps the rubber bits had cracked, however this does not appear to be the case. Anyone have any tips/tricks to fix this problem? Regards, Dave -- dave04a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Vintage computing equipment collector. http://www.parse.com/~ddunfield/museum/index.html

20 years, 3 months

20,046 page doc archive still available

by aek＠spies.com

Are people downloading things from bitsavers and selling them for a profit? -- http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=74946&item=5120677046 http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=163&item=5117657361 http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=163&item=5117657564 http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=163&item=5117657045 http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=4619&item=3695381778 and thanks to the last four, I've had a few dozen people trying to Wget the whole IBM section of the archive.

20 years, 3 months

HP Repair parts needed (urgently...)

by dwight.elvey＠amd.com

>From: "Jay West" <jwest(a)classiccmp.org> > >Joe R. said that he had some in response to a query I posted some time ago. >He never found them I guess. I'm still looking for a couple, exact same part >as you are. Then again, I'm sure he's got his hands full these days. If you >find a source for these Bob, please let me know! > >Jay > > Hi How are these parts made. Is it something in plastic that can be molded. If so, someone should get some mold material and make a mold before the last one is broken. Dwight

20 years, 3 months

Completely and totally off-topic and without any merit whatsoever

by dwight.elvey＠amd.com

>From: "Vintage Computer Festival" <vcf(a)siconic.com> > >On Tue, 7 Sep 2004, Pete Turnbull wrote: > >> I'm surprised nobody has thought of the obvious: mercury is >> considerably denser than glass, so the glass would float on the >> surface. All you have to do is skim it. Never mind skimmed milk, >> Sellam, you can have skimmed quicksilver ;-) > >I noticed it was actually staying on the surface, but I don't want to >touch it! That'd be dangerous. I just want to quaff it. Hi From what, the glass or the mercury? Dwight

20 years, 3 months

20,046 page doc archive still available

by aek＠spies.com

he does say in his auction that he has permission from the various sites to put the DVD together -- Mr Watzman did not ask, and I would not have given him permission to sell the material from bitsavers. I have asked him not to mention my URL in any of his future usenet postings. For the record, I DO NOT want the material from my site to be sold in any form.

20 years, 3 months

Completely and totally off-topic and without any merit whatsoever

by pete＠dunnington.u-net.com

On Sep 7 2004, 14:35, Vintage Computer Festival wrote: > On Tue, 7 Sep 2004, Pete Turnbull wrote: > > > Well, whatever you do, don't try putting it in hollowed-out .357 magnum > > bullets, nor even .38 specials. It's illegal, and no fun at all. > > Is that a veiled suggestion? If so, what is the result (besides internal > Hg poisoning, let alone internal bleeding, tissue damage, etc.)? Try it on a watermelon or a gallon plastic container full of water and you'll see. If you use a normal .38 special, it will make a hole (the plastic container would leak, from one or more likely two small holes). A hollow-point round will make it shatter -- the hollow point expands and more energy is transferred into the target, more quickly. A Glaser safety slug will make it explode, and a mercury-filled round has a similar effect. -- Pete Peter Turnbull Network Manager University of York

20 years, 3 months

20,046 page doc archive still available

by jfoust＠threedee.com

At 04:33 PM 9/7/2004, Steve Thatcher wrote: >and we can expect the stuff you send him to magically appear on eBay for him to sell... Well, of course. All these docs are probably in a no-man's-land of unenforced copyrights belonging to long-dead companies. It doesn't really give anyone the right to redistribute them. What's the real difference between someone giving them away on a web site or someone collecting docs and selling a DVD on ebay? He gives free copies of the DVD to people who send him docs. I played this game once and made a very big pile of money at it. In the early 90s, I collected 3D models from artists with the understanding that I would put them on a CD and sell it and give them a free copy. I collected more than 500 models, generated a few hundred tileable textures with a Mac program, and sold (and gave away) thousands of CDs at $200. Arguably, he's created a collection and holds a "collection copyright" on his assembly and arrangement of public domain or abandoned docs. Could someone put his DVD online and could he justifably complain? Probably. - John

20 years, 3 months

Interactive displays was Re: Cool book

by pete＠dunnington.u-net.com

On Sep 7 2004, 10:51, Cameron Kaiser wrote: > > You are a sick person Sellam. I see you have already > > had a good swig of that Hg. > > Just wait until the t-t-t-t-t-t-t-t-t-t-tremours start. The best is when the skin starts to itch and flake off and the kidneys give up. -- Pete Peter Turnbull Network Manager University of York

20 years, 3 months

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test-drb September 2004