test-drb August 2004

test-drb@ccmp.vtda.org

283 participants
661 discussions

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Foam pads for keytronics keyboards ?

by jos.mar＠bluewin.ch

Does anybody have a current source for the foam pads that are used in capacitive Keytronics keyboards ?

20 years, 5 months

HP 2100 manuals on ebay

by jwest＠classiccmp.org

I didn't bid on this (was preparing to snipe), but finally talked to the other bidder and was sure the documentation would be preserved on bitsavers. Turns out some other third person won the auction who I don't recognize their ebay userid. I sure hope it was a classiccmp'er and we'll all benefit >from the archival of the documents. If not... it's probably lost. Big shame, looked like some great stuff. Jay West --- [This E-mail scanned for viruses by Declude Virus]

20 years, 5 months

rarest computers

by dwight.elvey＠amd.com

>From: "William Donzelli" <aw288(a)osfn.org> ---snip--- > >You will see that most machines - nearly all - did pretty unimportant jobs >in their lifes. I look at mine - one was used for managing parts for GM in >Canada. Another did payroll at a steel and bridge company. Another was >used in a high school. A few I simply do not know. Anyway, not very >exciting. What I am looking for are instances of machines with a exciting >history. > OK, now I see what you are getting at. History of these machines is really hard to get. For the most part, it is even harder to prove. The most interesting one from that standpoint was the Olivetti M20. I got it from the xwife of a fellow that worked for Olivetti here in Sunnyvale, developing applications. When he gave it to her, all she wanted it for was the word processor. I have a Kim that was purchased by a fellow that was in the early days but never actually did anything with it. Sales slip included. Most anything else I've gotten lacks history. I wish I'd gotten more with items but it is tough enough to just round up documents and programs for these machines. The only machine that I know the complete history is my second computer ( a H89 ). I built it and learned from it. I've designed and built some of my own I/O boards for it. I have nothing with any Earth shaking history( that I know of ). I know such machines are out there. They just never come my way. I'm just not in the right place at the right time. I keep looking, though. I guess the biggest problem is that few individual machines were actually involved in history making events. Many may have been involved in bits and pieces. The only famous machine I can think of is the IMSAI that was used in "War Games". It is not all that important a history event but it is the only one I know about. There are reproduction items but no other originals that I'd consider related to historic evens or times. You are really asking for the rarest of items. Dwight

20 years, 5 months

rarest computers

by cb＠mythtech.net

>> Apple IIc Plus - Only made for a year or so. Again, not ultra-rare, but not >> often seen around. > >Is this the one that has a small form factor? It is a small form factor Apple II series. Looks kind of like a small briefcase or a laptop without a screen. The difference between the IIc+ and the regular IIc is the IIc+ has an integrated power supply and a 3.5" floppy drive. (The regular IIc has a 5.25" drive and requires an external power brick). -chris <http://www.mythtech.net>

20 years, 5 months

RA71 all alone?

by brad＠heeltoe.com

Hi, [dec pdp-11 question] anyone know if I can use a RA71 drive all by it's lonesome with an UDA50? I have some RA90's which are working fine but I found a naked RA71 recently and was wondering if I can use it. (probably not without some sort of controller board, but I thought I'd ask) It has a obvious molex power connector and three .1" headers. Two of the headers look like they want to accept the 8 pin plug from my UDA 50 :-) probably wishful thinking. (I've been running the RA90's straight from the UDA50 with the 'red cable'; this has been working fine and doesn't violate the 'odd # of cables' rule) -brad

20 years, 5 months

PDP-11 Freeware CDs for RSX-11 and RT-11 (Originally Produced by Tim Shoppa)

by jhfinexgs2＠compsys.to

Hi John, I attempted to send the following e-mail, but it keeps getting rejected at your e-mail address. So I am also sending it to the classiccmp address in case anyone is able to forward it to you. If anyone at classiccmp knows what the problem is, then please help! If John sends me his new (or old) e-mail address or can verify the snail mail address, that would be what I need!!!!!! Sincerely yours, Jerome Fine ============================================ Hi John, At this point, after many delays - most of which are my fault - I am about to mail the CDs. They are actually ready to be taken to the Post Office to be mailed. I want to check on your address first, so please respond! John W. McCance aaaaa (deleted in case it is private) aaaaa aaaaa Thank you for being so patient!!!!!!!!!!!!!!! Sincerely yours, Jerome Fine -- If you attempted to send a reply and the original e-mail address has been discontinued due a high volume of junk e-mail, then the semi-permanent e-mail address can be obtained by replacing the four characters preceding the 'at' with the four digits of the current year.

20 years, 5 months

PDP-11 Freeware CDs for RSX-11 and RT-11 (Originally Produced by Tim Shoppa)

by jhfinexgs2＠compsys.to

20 years, 5 months

RA71 all alone?

by msokolov＠ivan.Harhan.ORG

Brad Parker <brad(a)heeltoe.com> wrote: > anyone know if I can use a RA71 drive all by it's lonesome with an UDA50? > > I have some RA90's which are working fine but I found a naked RA71 > recently and was wondering if I can use it. (probably not without some > sort of controller board, but I thought I'd ask) RA71 is an SDI drive just like RA90 and every other RAxx drive. They all connect directly to an SDI controller (UDA50, KDA50, KDB50, KDM70, HSC, etc). You just need the right SDI cables. I have never seen a UDA50 (all my life so far has been Q-bus MicroVAXen, so all my RA drives are on KDA50s), so I don't know what cable it will need. > It has a obvious molex power connector and three .1" headers. Two of > the headers look like they want to accept the 8 pin plug from my UDA 50 > :-) Those are SDI connectors for port A and port B. The larger header is for the OCP (operator control panel). Having an OCP is nice, but one can live without it (I have none myself). Without an OCP the drive gets its unit number from 3 switches on the side. This limits the unit number to 0-7, while the MSCP spec allows much higher unit numbers. I believe you can get the full MSCP spec range of unit numbers with the OCP. MS

20 years, 5 months

PDP-11 Freeware CDs for RSX-11 and RT-11 (Originally Produced by Tim Shoppa)

by jhfinexgs2＠compsys.to

20 years, 5 months

Electronics Barn closing

by sloboyko＠yahoo.com

Ron Hudson Stated: >Another problem with most modern stuff is that it is >surface mount tiny "you can't work on it without >special tools" not meant for repair, only for >replacement. This is not really a problem with surface mount. I thought this would be impossible too - then I built, as my first SMT project, a Nixie tube watch - with "over 45" eyeballs that never worked perfectly. http://juliepalooza.8m.com/sl/nixwatch.htm I invested in only: 1. A GOOD temperature controlled iron ($50) from eBay 2. Good (but not great) tweezers ($5.00) 3. $5.00 set of eye loupes 4. $110.00 - a hot air rework station from eBay (I didn't really need this) 5. Some flux "markers" and some really thin solder >from Digi-Key - around $20 Nice things about surface mount are that the parts are really cheap, you can get a lot more stuff on a board (board cost), and the parts can be fairly easily recycled (especially with the rework station). The real problem as I see it is the proliferation of parts. The Digi-Key catalog is like, 10 times the size it was in the 70/80's. Parts come and go very quickly now. And with ASICs, you are at the mercy of the manufacturer. I am concerned that all the TTL in the surplus market now is all that there is-I can't beleive that anyone is making any more. Wire-wrap sockets and quality punched boards are getting very expensive. ===== -Steve Loboyko Incredible wisdom actually found in a commerical fortune cookie: "When small men cast long shadows, then it is very late in the day." Website: http://juliepalooza.8m.com/sl __________________________________ Do you Yahoo!? Take Yahoo! Mail with you! Get it on your mobile phone. http://mobile.yahoo.com/maildemo

20 years, 5 months

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test-drb August 2004