test-drb

test-drb@ccmp.vtda.org

101090 discussions

by spedraja＠gmail.com

As far as I can check it, the systems in Cray-Cyber.org are down *all the time* (with the exception of the 'login' front-end). Somebody know what happens with this initiative ? Regards SPc.

13 years, 5 months

Blog: Scanning Documents with Limited Colors for Optical Character Recognition

by legalize＠xmission.com

<http://computergraphicsmuseum.org/2012/10/23/scanning-documents-with-limite…> Please post comments on the blog, thanks. -- "The Direct3D Graphics Pipeline" free book <http://tinyurl.com/d3d-pipeline> The Computer Graphics Museum <http://computergraphicsmuseum.org> The Terminals Wiki <http://terminals.classiccmp.org> Legalize Adulthood! (my blog) <http://legalizeadulthood.wordpress.com>

13 years, 5 months

Flossie makes the news ICT 1301

by dave.thearchivist＠gmail.com

http://www.bbc.co.uk/news/uk-england-kent-20031487 Dave Caroline

13 years, 5 months

Our Museum Need a special help..

by curador＠museudocomputador.com.br

we need to buy 15 000 3 1/2 Inch Floppy Disk Drive new in box for our museum here in Brazil. could someone help us? with some donation, any amount helps. We also appreciate, as our museum needs to reopen. Please send by bank of Brazil (Banco do Brasil) agency: 2445-7 account : 8975-3 Associa??o Cultural dos Amigos ad Informatica . our direction if sending by mail: Museu do Computador - Roma Street, 75 - Itapecerica da Serra -SP 06855-410 Brazil Thanks -- *E-mail do facebook: jose.c.valle at facebook.com * *Cel CLARO: 8874-0100* *Cel VIVO: 9562-0211* *Cel: TIM : 5142-5559* *SKYPE: JOSECVALLE* *Twitter: @curadordomuseu* * *

13 years, 5 months

IBM DOS/VSE Listing in eBay

by spedraja＠ono.com

Not sure if this would be interesting for someone (Herculeans specially)... http://www.ebay.com/itm/IBM-DOS-VSE-Supervisor-Assembly-Listing-Rel-3-0-PTF… SPc.

13 years, 5 months

VMS newbie with sick VAXstation

by saquinn624＠aol.com

Message: 26 Date: Mon, 22 Oct 2012 06:31:59 -0700 (PDT) From: Cameron Kaiser <spectre at floodgap.com> To: cctalk at classiccmp.org Subject: Re: VMS newbie with sick VAXstation Message-ID: <201210221331.q9MDVxS117432808 at floodgap.com> Content-Type: text/plain; charset=US-ASCII > Wish I'd known you were after MMJ stuff, could've made you some! Postage > from the UK wouldn't have been prohibitive :) > >> > %SYSBOOT-I-SYSBOOT Mapping the SYSDUMP.DMP on the System Disk >> > %SYSBOOT-I-SYSBOOT SYSDUMP.DMP on System Disk successfully mapped >> > %SYSBOOT-I-SYSBOOT Mapping PAGEFILE.SYS on the System Disk >> > %SYSBOOT-I-SYSBOOT SAVEDUMP parameter not set to protect the PAGEFILE.SYS >> > OpenVMS (TM) VAX Version V7.2 Major version id = 1 Minor versio [cut] >> > %DECnet-I-LOADED, network base image loaded, version = 05.0D.00 >> > >> > %DECnet-W-NOOPEN, could not open SYS$SYSROOT:[SYSEXE]NET$CONFIG.DAT >> >> Bizarre, even missing DECnet/OSI configs (which is what that error points >> to) shouldn't cause a crash. >> >> Time for a conversational boot. At the dead sergeant prompt (>>>) do B/1 >> >> You'll get a SYSBOOT> prompt. Type 'set startup_p1 "min"' then C to >> continue. This will at least get you running. Once logged in do 'product >> show product' and give us the output. DECnet is obviously not happy. > > >Thanks for the tips. I'll give this a spin this evening after work. >I was puzzling over the bits I needed from the URL Jonathan provided. Couldn't this be a symptom of a redefined SYS$SYSROOT: pointing somewhere else other than DKA0: (such as an external expansion pack)? In any case, if your VS isn't running a new version of UCX or MultiNet/TCPware go ahead and get TCPware or Multinet, as the version of UCX that came with 7.2 would bring the machine to a crawl under light network load.

13 years, 5 months

unibus to modern disk interface? (tangent on MFM drives)

by js＠cimmeri.com

Subject: Re: unibus to modern disk interface? From: allison <ajp166 at verizon.net> Date: Mon, 15 Oct 2012 21:17:57 -0400 ... Me I planed ahead and kept all the small drives that people didn't want but still ran from older MFM and IDE to SCSI. That and old boards even if flagged dead.. they can be fixed or used for parts. Allison Hey, A. How are you keeping the bearings in your MFM drives lubed (if you are)? Most of my MFM drives still work, but the bearings are drying out. As the motors work harder to turn, the motor controllers run hotter and will burn out there first unless a way can be found to apply lube to the motors. Lou Ernst and I have been mulling over this issue. - John S.

13 years, 5 months

Anyone want an intel overdrive chip?

by wackyvorlon＠me.com

I have an Intel Overdrive DX4ODP75 kicking around. Anyone interested? Free to good home:)

13 years, 5 months

Prestel and Viewdata

by robert＠irrelevant.com

In a random fit of rash behaviour, I've copied over and "made live" the wiki version of my viewdata history/preservation/memories website, running alongside and in parallel to the existing version. This means that if any of you want to contribute, then rather than hoping I'll get around to adding stuff at some indeterminate future date, you can pile right in there! There's still lots of pages to convert over, and I need to sort out my custom plugins that manage the documents and viewdata pages themselves, but that's why the old version is still there... at least this way, I might feel guilty about not having updated for over a year and get on and do it ... So, if anybody wants to help, get in there! (Wiki) http://www.viewdata.org.uk/introduction (old) http://www.viewdata.org.uk/index.php?cat=10_Home&page=10_Welcome Rob.

13 years, 5 months

S: AS/400 connection software for classic Apple Macintosh

by poc＠pocnet.net

Hello, I'm searching for certain software to make AS/400 and Classic Macs (late System 6 to 7.6.1) "talk" together properly. It's no problem to get this with current OS X but the old software has gone and I can't find this, let's call it abandonware, on the net. I'm running an 9401/170 attached to a token ring where also a Mac IIfx with a TokenRing NB 4/16-Board is attached. Plus a PowerMac 7500, also with a Token Ring Board. The whole stuff is running very smooothly but I'm lacking direct access to SNA and/or tn5250 via TCP/IP. According to an old Apple Book (Data communications and networks) there have been many solutions available (in no particular order): - Incarnations of sna?ps 5250 (gateway and client), - MacRUMBA Gateway (I got hold on the client a few months ago), - TokenAxcess, - MacMainframe (gateway and workstation), - asc5250 (Comm Toolbox module collection for TCP/IP), - MacMidrange, - Possibly MacIRMA (gateway and workstation), - MacTwin (with Twinax Card! Without it's nearly useless). - Netware for SAA 3.x, since I'm running NW 3.12 in a virtual machine. Any of these are of interest. A big plus (but not a must-have) would be if the particular software is complete with original disks, manual(s), and package. I also heard of a PTF for the AS/400 which provides AppleTalk service to the machine. Users can then connect to the AS/400 via Mac RUMBA, sna.ps client or such. One source of information said, this was a looong time ago and that PTF is expected to apply to OS/400 V3 or older, while I'm running V4R5. More specific information on this topic would be very welcome! Can't find anything useful on the net for that. Thank you in advance for your time and help. Regards, PoC

13 years, 5 months

ISA PC & misc gear for sale

by jimpdavis＠gorge.net

ISA PC-Elevator 386 + 387 co-processor board - $40 http://alkaspace.com/is.php?i=148130&img=Pc-elevator.jpg ISA Digiboard Digichannel PC/8i 8 port serial - $30.00 http://alkaspace.com/is.php?i=148816&img=digi-if.jpg http://alkaspace.com/is.php?i=148815&img=digi-board.jpg 1987 High-end ISA VGA card TMS 34010-40 NEC - $25.00 http://alkaspace.com/is.php?i=148222&img=video-1.jpg 1987 High-end ISA VGA card TMS 34010-40 NumberNine - $30.00 http://alkaspace.com/is.php?i=148224&img=video-2.jpg Tektronix 4662 plotter - $100 / OBO http://alkaspace.com/is.php?i=148769&img=Front.jpg Hayes VSM 9600B full length ISA - Modem collector? - $15.00 http://alkaspace.com/is.php?i=148817&img=hayes-9600.jpg + shipping - Paypal friends option. Reply to jimpdavis at gmail.com - Jim.

13 years, 5 months

cctalk Digest, Vol 110, Issue 52

by elson＠pico-systems.com

> Date: Fri, 19 Oct 2012 22:13:53 +0100 (BST) > From: ard at p850ug1.demon.co.uk (Tony Duell) > To: cctalk at classiccmp.org > Subject: Microscopes > Message-ID: <m1TPJtH-000J4cC at p850ug1> > Content-Type: text/plain > > > Soem years ago a freidn of mine said he and an old microscope that he > didn;'t want. I was expecting at best a Russian thing (which, to be fair, > are quite reasoanble). I was amazed when he gave me a genuine Zeiss > microscope with 3 objectives in the turret. It needed a minor electrical > repair to the lamp PSU, but that was hardly a problem. > > It's not stereo, thoug. It does have binocular eyepieces, but with a beam > splitter from one objective. SO it's less tiring to use than a single > eyepiece model, but you don't get 3D images. It's stil la very nice > instruemnt > 3D really isn't all that important, most of the time. But, the longer working distance is the BIG thing on most of the stereo microscopes, especially for soldering and other electronic tweaking. Also, most of these have a really wide field of view and lower magnification than traditional microscopes. Jon

13 years, 6 months

It lives!

by francois.dion＠gmail.com

I thought I had sent this to cctalk, but apparently not. There are now 3 clues up, because I posted about it on tuesday, one hint a day. Guess what computer I brought back from the dead? http://raspberry-python.blogspot.com/2012/10/it-lives-hint-1.html I'm thinking somebody on this list has used one and will recognize it. Just a simple screenshot to start with... Francois -- solarisdesktop.blogspot.com - raspberry-python.blogspot.com

13 years, 6 months

Free 2) HP 2345a terimal servers. Kent, Wa. USA

by g-wright＠att.net

Free, Pick up in Kent WA. - Jerry

13 years, 6 months

Kickstarter project for a new run of P112 kits

by dgriffi＠cs.csubak.edu

Since I ran out of P112 kits last year, I've been asked multiple times to produce more. The critical thing in doing this is financing the project. So, I've set up a Kickstarter.com project to get things going. There are some differences in the kits this time round. The big one is that I'm no longer offering complete kits. Sorting thousands of tiny parts into ziplock bags was a big hassle. Instead the kit will contain a PCB with surface-mount parts soldered on, a boot ROM, serial port pigtails, and two CDs of documentation and software. I have prepared a shared project on Mouser for most of the remaining parts. The serial chips are obtained >from Digikey. This way you can just de-select what you already have, or order something different -- like if you want machined sockets instead of dual-wipes. Go to http://661.org/p112 to read about the P112 and find the link to Kickstarter. -- David Griffith dgriffi at cs.csubak.edu A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?

13 years, 6 months

socketed 84-pin PLCC logic analyzer connection

by keithvz＠verizon.net

I've got the need to connect a logic analyzer to a socketed 84-pin PLCC IC. The test clips I'm familiar with won't attach properly because they expect a soldered chip instead. Besides removing the socket and resoldering the IC directly to the PCB and using a traditional test clip (which are affordable), are there any other plug-and-play solutions? I've found these http://www.emulation.com/catalog/off-the-shelf_solutions/logic_analyzer-sco… http://www.emulation.com/cgi-cfm/insert_quantity.cfm?part_number=BC4-84-PCC… ($308) and http://www.logicalsys.com/painfo-vpasp-vb.asp?adapter=pa84-pp ($185 US) which seem pretty darn cool, but also pretty darn expensive. The PCB is almost 30 years old, for whatever that's worth. Thanks, Keith

13 years, 6 months

Classilla 9.3.1

by spectre＠floodgap.com

For those of you who like giving your Mac OS 8.6 or 9 machines a little exercise, I'm making an interim release of Classilla with the security rollup about 1/3rd done: http://www.classilla.org/ -- ------------------------------------ personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com -- On the Internet, everyone suspects you're a dog. -- Kristen Kelleher -------

13 years, 6 months

Quadra 700 buttons?

by fraveydank＠gmail.com

Hey folks, I recently brought a Quadra 700 back to life that I got non-working for a decent price off eBay. The resuscitation is an exciting story in and of itself: - First, the power supply was dead, which I traced to a bad transformer for the +5v trickle supply, which also operates the rest of the power supply's electronics; not being able to repair it or determine the winding ratio for a replacement, I had to get another power supply for more than I paid for the machine itself. If I ever find out the details of the transformer, I may resurrect the supply as a spare; the folks formerly of Bomarc have reverse-engineered schematics that I may avail myself of. - The PRAM battery had exploded, causing untold amounts of damage to everything beneath it. One SIMM was rendered non-functional, the interrupt and reset buttons are completely useless (they alternate between inoperable and intermittently on, neither of which is useful) and the acid ate away pin 14 (the power leg) of a 74F04 as well as the pad beneath it, which made for infuriatingly erratic behavior until I figured it out and fixed it with a white wire. Anyway, I have a very happy machine now, but I need to replace a few components. I've found a perfect replacement for the battery holder (which was eaten away by the acid, as I discussed in a previous email), but I'm having a hard time finding replacements for the right-angle buttons used for the reset and interrupt buttons. They're not strictly necessary, but since I plan on using the machine for NetBSD driver development among other things, they'd be very nice to have. So does anyone happen to know where to find the BOM for the Q700 (highly unlikely), know what kind of buttons were used for the Q700 (also probably the IIci and IIcx, somewhat less unlikely), or know a good way to find buttons with precise mechanical dimensions? I'd be greatly indebted. I realize this is a long shot, but if there's anywhere that might have it, it would be here (also Erik's VCF, which I'll also check). - Dave

13 years, 6 months

Back from the dead - Timex Sinclair ZX80/81

by mcquiggi＠me.com

Hmmm that's what it looks like to me. Kevin Sent from my iPad

13 years, 6 months

Anyone want a DEC Letterwriter 100? Or a DEREP?

by binarydinosaurs＠gmail.com

2 actually, currently in Cambs UK and heading for the scrap pile along with the DEREP. It's rare to see them with complete keyboards! -- adrian/witchy Owner of Binary Dinosaurs, the UK's biggest home computer collection? www.binarydinosaurs.co.uk

13 years, 6 months

Interesting analog data system

by auringer＠tds.net

I ran across this auction that I thought someone here might be interested in. It is a paper punch for edge notched data storage research cards. The system is described here: http://en.wikipedia.org/wiki/Edge-notched_card http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=261115271862&ssPageName=…

13 years, 6 months

System for sale on Epay, Listed as Northstar Horizon is actually Ferguson board

by jws＠jwsss.com

This is an auction for a system on Ebay which might be interesting. It is listed as a "Northstar Horizon" but has what appears to be a single board system marked Ferguson. That would probably not be from Northstar. Also it is built up with 8" floppies which is even less related to Northstar. it appears he got a pile for a Northstar system with the Ferguson homebuilt which is in an Incoterm box which holds the floppies. There is a listing for a bigboard on bitsavers which is probably for this system. http://www.ebay.com/itm/400301360595 Price may actually be something if anyone feels a burning need for a Ferguson board, but I think its high for an ordinary Horizon. Too bad there is a missing Horizon.

13 years, 6 months

PDP1 Music / Record sold

by elson＠pico-systems.com

> From: jim s <jws at jwsss.com> > To: General Discussion: On-Topic and Off-Topic Posts > <cctalk at classiccmp.org> > Subject: PDP1 Music / Record sold > Message-ID: <507F50BC.30102 at jwsss.com> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > The fellow who posted the record some time back which was titled to be > PDP1 music reposted the record for $299 and sold it. > > the reason to note anything about it is that I had emailed him about > taking a capture of it and passing it along before selling the record > > The ebay listing up right now has a track you can download as long as it > stays up. > > http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=170923504018 > > Here is the link to the song as well. > > http://ampnoise.com/mp3/MusicOnThePDP-1X_Pinafore.mp3 > > I thought it was nice of him to do that, as many people who list things > on ebay would have bothered. I would say that it was just to sell the > record, but I think the rarity of it to record collectors and a lower > price is why it sold. > > Man, what a blast from the past! A friend of mine did some work like this on a PDP-5, about 1970, at Washington U. I think the PDP-1 does a little better, but it was fairly comparable. Jon

13 years, 6 months

fine pitch soldering

by elson＠pico-systems.com

M From: Dave McGuire <mcguire at neurotica.com> To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> Subject: Re: fine pitch soldering Message-ID: <508063F0.2080503 at neurotica.com> Content-Type: text/plain; charset=ISO-8859-1 On 10/18/2012 12:21 PM, Jon Elson wrote: > > I have been doing fine-pitch soldering for a long time. I do stuff as > > fine as > > 0.4mm lead pitch, which is a bit of a pain. The bulk of stuff I now make > > with a pick and place machine and a reflow oven (converted toaster oven > > with thermocouple ramp-and-soak controller). > What type of pick-and-place system do you have? I'm looking to move in that direction. I got a VERY good deal on a Philips CSM-84. This model can hold up to about 55 8-mm feeders (capacity reduced for larger sizes) and has a vibratory feeder option and a large chip alignment station. For small chips and passives it aligns with mechanical jaws on the head. it has 3 heads, I have 2 set up with the jaws and one with no jaws to use the separate aligner. These machines are also available with vision, mine does not have that feature. It is a BIG machine, 5 x 7 feet, and needs compressed air and a fair amount of power. it is single-phase, however. It weighs about 1600 Lbs. Note that with all these machines, the feeders will probably cost more than the used machine. The CSM-84 is a VERY flexible machine, and easy to program. (The vision system needs a LOT more programming than the placement section, but once you have programmed all the parts you use, the vision doesn't need much attention.) So, I do everything from 0805 up to 30mm FPGAs with it. It is marginal with .65mm pitch parts, but does great with SO chips and all passives. If you look at other machines, check carefully about the range of parts they handle, and the consumables. Some of these machines eat several vacuum nozzles at $100 a pop every shift, and guarantee a broken nozzle on any mis-pick or tumbled part, not to mention actual crashes. The CSM is VERY robust in comparison, uses steel nozzles and can survive most crashes without much damage. Having the experience with mine, I might have been better off to get a machine with vision instead of the jaw alignment, but it all depends on the kind of stuff you do. The later machines are generally marked with a /// after the model to indicate a later computer and brushless servo motors. There is the CSM-84 VZ which has vision and a Z axis servo, and the VANE which has vision and the auto nozzle exchanger. Not so sure about the ANE system, it uses different nozzles, and they look more fragile. I have made a big nozzle for FPGAs with a lathe and mill for my machine. I paid about $3600 for my machine including shipping and about 50 feeders. It cost me more than that to have a double door installed on my basement to get it inside! Obviously, I had a motivated seller who needed to get this machine off his floor to make room for new machines already in transit. Every day I communicated with him, the deal got sweeter. First, just the machine, then some feeders, then lots more feeders (all he had) then a box of spare parts. One thing is to get a machine that is highly regarded by the community (there are some REAL lemons out there) and be sure to get the manuals including the service manuals, because something WILL go wrong on these older machines. They ARE complex, mine has over 50 sensors and about 25 actuators. Jon cctalk-request at classiccmp.org wrote: > Send cctalk mailing list submissions to > cctalk at classiccmp.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://www.classiccmp.org/mailman/listinfo/cctalk > or, via email, send a message with subject or body 'help' to > cctalk-request at classiccmp.org > > You can reach the person managing the list at > cctalk-owner at classiccmp.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of cctalk digest..." > > > Today's Topics: > > 1. Re: fine pitch soldering (Chuck Guzis) > 2. Re: It lives! (Liam Proven) > 3. Re: It lives! (Ethan Dicks) > 4. Re: It lives! (David Riley) > 5. Re: It lives! (barythrin at gmail.com) > 6. Re: It lives! (Shoppa, Tim) > 7. Re: It lives! (John Many Jars) > 8. Re: PDP1 Music / Record sold (barythrin at gmail.com) > 9. Re: It lives! (David Brownlee) > 10. RE: Skipware level, late 2012 (John Foust) > 11. Re: fine pitch soldering (Dave McGuire) > 12. Re: Dead LCD monitor? - replace $2 worth of caps - Re: > Skipware level, late 2012 (John Foust) > 13. Re: UCSD-P for the WD-900 ? (Eric Smith) > 14. Re: fine pitch soldering (Dave McGuire) > 15. Re: fine pitch soldering (Ryan Brooks) > 16. Re: fine pitch soldering (Chuck Guzis) > 17. Re: fine pitch soldering (Dave McGuire) > 18. Re: Desoldering Pump (Paul Anderson) > 19. Re: An 80386 CPU S-100 Board (Tony Duell) > 20. Re: An 80386 CPU S-100 Board (Paul Anderson) > 21. Re: Anyone want a DEC Letterwriter 100? Or a DEREP? (Dave McGuire) > 22. Re: Anyone want a DEC Letterwriter 100? Or a DEREP? (Dave McGuire) > 23. Re: An 80386 CPU S-100 Board (Ethan Dicks) > 24. Re: Anyone want a DEC Letterwriter 100? Or a DEREP? (ben) > 25. Re: Anyone want a DEC Letterwriter 100? Or a DEREP? (Ethan Dicks) > 26. Re: An 80386 CPU S-100 Board (mc68010) > 27. Re: Dead LCD monitor? - replace $2 worth of caps - Re: > Skipware level, late 2012 (Toby Thain) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Thu, 18 Oct 2012 10:26:32 -0700 > From: Chuck Guzis <cclist at sydex.com> > To: General Discussion: On-Topic and Off-Topic Posts > <cctalk at classiccmp.org> > Subject: Re: fine pitch soldering > Message-ID: <50803BC8.3080004 at sydex.com> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > On 10/18/2012 09:21 AM, Jon Elson wrote: > > >> The MOST important thing is a >> stereo zoom microscope with a long working distance. A working >> distance of 2-3" is necessary to get your hands and a soldering iron >> under it. A ring light can be made from a ring of PC board material >> that fits around the snout of the microscope. Carve a ring in the >> copper of the PCB so it becomes two concentric rings. Use a 12 V >> DC wall-wart power supply and 8 while LEDs, with about 1 K Ohm >> series resistors. >> > > Agree on the stereo microscope (dissection microscope). I find that the > CCFL ring lights made for cars and motorcycles are cheap and give much > more intense and even (shadowless) light. Typical diameter is about 100 > mm and all seem to come with mounting clips or tabs. You can also get > them in LED, but I find the light from a white CCFL much easier on the > eyes. Cheap inverters are available to run the CCFL lamps. I use the > microscope for initial positioning and completed inspection and prefer > to use a binocular loupe during the actual soldering. > > >> Solder braid can be used to remove excess solder bridging the >> leads, which WILL happen frequently. For big, high-density >> chips, this is my procedure: First, put a tiny dab of solder >> on 2 corner pads. Align the chip with the pads, and solder >> the corners that have the extra solder. >> > > For large TQFPs, I anchor the chip body to the PCB with a dab of clear > nail polish, using the microscope for accurate positioning. Once the > polish has set, I proceed with the corner soldering. I find that I can > get extremely good registration this way. It's not fast, but it's > nearly foolproof. > > FWIW, > Chuck > > > > > ------------------------------ > > Message: 2 > Date: Thu, 18 Oct 2012 18:34:58 +0100 > From: Liam Proven <lproven at gmail.com> > To: "General Discussion: On-Topic Posts Only" <cctech at classiccmp.org> > Subject: Re: It lives! > Message-ID: > <CAMTenCHLomP=yvz6sQsA0VAc4FzqKoJHd4+in98H9GKstg=OYQ at mail.gmail.com> > Content-Type: text/plain; charset=windows-1252 > > On 18 October 2012 15:41, Francois Dion <francois.dion at gmail.com> wrote: > >> I thought I had sent this to cctalk, but apparently not. There are now >> 3 clues up, because I posted about it on tuesday, one hint a day. >> >> >> Guess what computer I brought back from the dead? >> >> http://raspberry-python.blogspot.com/2012/10/it-lives-hint-1.html >> >> I'm thinking somebody on this list has used one and will recognize it. >> Just a simple screenshot to start with... >> > > I was going to guess Apple II or that era from the BASIC prompt of ] > but not given the later hints... > >

13 years, 6 months

cctalk Digest, Vol 110, Issue 49

by elson＠pico-systems.com

cctalk-request at classiccmp.org wrote: > Agree on the stereo microscope (dissection microscope). I find that the > CCFL ring lights made for cars and motorcycles are cheap and give much > more intense and even (shadowless) light. Yes, they are almost perfect. BUT, they are usually too big in diameter. By custom making one with LEDs, you can fit it to be completely snug to the microscope body and sit up against the sides of the microscope, so it is as far out of the way as possible. We got a ringlight with a new Chinese scope at work, but it hung below the bottom of the scope and was over an inch wider than the scope itself, so I replaced it with my own LED ring light. > For large TQFPs, I anchor the chip body to the PCB with a dab of clear > nail polish, using the microscope for accurate positioning. Once the > polish has set, I proceed with the corner soldering. I find that I can > get extremely good registration this way. It's not fast, but it's > nearly foolproof. > I'm doing 0.4mm pitch chips, and have excellent alignment, also, with my method. Whatever works for you. Jon

13 years, 6 months

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test-drb