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.

21 years

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

21 years

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

21 years

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.

21 years

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

21 years

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

21 years

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.

21 years

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

21 years

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

21 years

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

21 years

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test-drb September 2004