test-drb April 2004

test-drb@ccmp.vtda.org

248 participants
481 discussions

Does anyone have National Semiconductor's Appnote AN-359?

by rmu_scada＠yahoo.com

http://www.nalanda.nitc.ac.in/industry/appnotes/Natsemi/AN-359.pdf __________________________________ Do you Yahoo!? Yahoo! Photos: High-quality 4x6 digital prints for 25¢ http://photos.yahoo.com/ph/print_splash

20 years, 8 months

save the Mac II (original)

by cb＠mythtech.net

>Actually the IIfx is a nice machine. 68040 40mhz and decent fx performance. >uses special memory though. '040? 68030 at 40 MHz -chris <http://www.mythtech.net>

20 years, 8 months

Data General boards, HP stuff, rainwater damage?

by shirker＠mooli.org.uk

Hi folks, Rescued the following last night, amongst some other stuff: * 3 large cards from a DG Nova system (?) around 16" square. - one marked "BASIC IO CONTROL DGC NOVA (C) 1968 DATA GENERAL CORP" This has a small board numbered 70-00196 which appears to have been retrofitted, judging by the number of blue wires running to it from the board itself. This seems to be in good shape. - two related ones, one marked "TELETYPE PLOTTER WITH ALPHANUMERICS ISSUE 1" and then in the top corner "LINK SYSTEMS LTD MADE IN ENGLAND" 2 ICs are missing and one is smashed open, and this board has a 3" or so rip in it - the other marked "TELETYPE PLOTTER WITH ALPHANUMERICS OPTIONS/Q.E.D." 2 ICs are missing from this one. 2 presets mounted on one side of this board look the worse for wear. * Motorola VME? board of some kind. 68020 CPU, 2/3 of VME height (has 2 of the VME-style connectors on one side), 50-pin IDC header on the opposite side, along with 2 switches, 2 red LEDs and 2 green LEDs. * "Opus" badged ADC MM-211 mono monitor, slight screenburn at bottom of CRT, has a DE9 connector with only 6 pins fitted. CGA/EGA? The above are free to good home - you pay postage or collect from near Leeds, UK. Not sure whether these are worth anything or not: * 2 BOC Edwards vacuum meters, one marked "PENNING 8" and one marked "PIRANI 11". About 4"x6" faces, panel mount, mains powered. Each one has a switch to select between ranges, and inputs on the back for the metering hardware. * Watkins-Johnson WJ-269-I Low Noise Amplifier, 2.3-4.5GHz in weird cylindrical black case, 110-120VAC. * Marconi "TF 868B Universal Bridge". Seems in nice condition except for what look like two sets of concentric knobs on the top panel of the unit have been smashed, and the top plate is cracked where this has happened. Make me an offer I can't refuse ;) I'd like Real Money(TM) for the following: * Farnell PU164A rack-mounted telco PSU, provides +5V, +/-12V, -50V, all @ big amps by the looks of the output busbars that were attached to it. Has mains lead, which is just as well as it uses a Bulgin 3-pin mains connector rather than an IEC320 socket. 2U I think. Weighs 12.5kg according to a sticker on it. * Half height (waist height) 19" rack, in fetching chocolate brown colour with folding handles on both sides. Has a piece of kitchen work surface on the top in an attractive pine finish ;) Put your servers in your kitchen? (The ultimate in domestically-acceptable 19" racks maybe?) Has big castors for ease of shiftage. Again, please make an offer by email if you're interested, otherwise they hit ePay. And the following I'll most likely keep, but anything anyone can tell me about it would be much appreciated (specifically what's needed in terms of hardware/software to control it): * HP computer-controlled test & measurement system, comprising: - 61001A System Power Unit - 61010A Digital I/O - 61011A Relay Mux - 61012A Dual Voltage DAC - 61013A Digital Multimeter - 61014A Function Generator - 61015A Counter - 61016A Digitizing Oscilloscope - 61017A Relay Actuator I had thought these would be HPIB, but the cable (26-way ribbon) looks nothing like it. Any/all info about these would be most handy. And now to the "rainwater" bit - I found all this in a skip (or "dumpster" for those of you of a North American persuasion) which was outside, so these things have been being rained on (except the telco PSU, which was in the rack and so will have been protected from rain). I haven't opened any of them up yet to check for corrosion, but I've spotted some rust on the edge of the casing of the 61001A already. What's the best way to deal with this stuff to prevent any further damage, and rectify (if necessary) any that the water has caused, if indeed it's caused any at all? Other than obvious corrosion, how would I tell? None of it was lying in standing water, FWIW - I don't think there was any in the skip, and this stuff was all well above it. TIA, Ed.

20 years, 8 months

save the Mac II (original)

by SUPRDAVE＠aol.com

Well, the Mac II is rather big and heavy although I guess you can stack other Mac models on top of it. I prefer the toaster macs since they are what people think of when you say macintosh. Actually the IIfx is a nice machine. 68040 40mhz and decent fx performance. uses special memory though. witchy(a)binarydinosaurs.co.uk writes: It would be for me, but I've already got one. Is there much interest for original Macs here? I'm beginning to wonder after nobody replied to me question about a dead Mac IIfx last week

20 years, 8 months

PDP-11 price guides

by pat＠computer-refuge.org

Has anyone worked on, or thought about working on, a "price guide" specifically for PDP-11 (or PDP-8, or VAX) hardware? I know of Michael Nadeu's book for microcomputers (which I keep meaning to buy), but this is really a different realm of things, as you can configure (for example) a PDP-11/23 in a whole lot more ways than you could with a C-64. I've thought "hmm, this would really be handy" a few times before, but haven't had much time to sit down and work on it. It'd be nice if I could keep it up to date, and use multiple data sources (not just past marketplace.vintage.org sales), including eBay and semi-private sales. Also, a "rarity" quantity of some sort would be useful, and could just be "very rare" for, say, the preverbial 11/74 (the one that's supposedly 2 CPUs), to "common" for an 11/23. Thoughts? Pat -- Purdue University ITAP/RCS --- http://www.itap.purdue.edu/rcs/ The Computer Refuge --- http://computer-refuge.org

20 years, 8 months

Great HP stuff on Ebay

by jwest＠classiccmp.org

I thought long and hard about posting this on the list, not wanting to draw attention to it as it's in an odd category on Ebay. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3092118791&category=6403… It's an HP 7900A drive, looks to be in great shape, and includes 7 pieces of media. After a long pause I decided I had enough of these. Odd, there was a day when I'd give my left arm for one of these, now I have a couple. So Ashley, here's an example - keep looking and the stuff does show up. Someone please get this drive and don't let it go to the scrapper! Also, make sure to get the 13215A power supply for this drive the seller also has under a separate auction, the drive is worthless without it. And do NOT use the media for this drive in a 7905/06, or vice versa, they look the same but you'll be really sorry :) If no one bids or wants this drive I may bid on it just to save it but I'd rather see someone else get it. The same seller is also selling a pretty nice 1000E cpu, a 12979 I/O expansion unit stuffed with cards, and another auction with keyboard and some cables. I can tell the 1000E cpu does have the right controller in it for this drive (dual 13210 interface). But please don't anyone bid on the DSU he has up in a separate auction, I want that very badly!!! :) Jay West --- [This E-mail scanned for viruses by Declude Virus]

20 years, 8 months

8" floppy Drive

by seansekora＠hotmail.com

Rich, I am emailing you to see if you still have an 8" floppy drive for sale. If so I would like to purchase one. Sean S. _________________________________________________________________ Get rid of annoying pop-up ads with the new MSN Toolbar – FREE! http://toolbar.msn.com/go/onm00200414ave/direct/01/

20 years, 8 months

PDP 11/40, VT50 or VT52, LA36

by wacarder＠usit.net

Does anyone on this list have any of the following items that they would be interested in getting rid of: PDP 11/40 with rack and RK05 drive(s) VT50 or VT52 DecScope LA36 Decwriter RK05 pack with RSTS/E I would like to attempt to reconstruct the computer that my friends and I used in college from 1975-80. Our former professor who was also director of the computer center and is now retired has indicated that he might offer some assistance in reconstructing the environment if we can find a PDP 11/40. Our college junked their 11/40 in 1989 or shortly thereafter. The new generation of computer people there "cleaned up" old junk and threw away anything that was left from the 11/40 that we knew and loved. We have created a pretty faithful replica using Bob Supnik's emulator and have it available via TELNET on the internet. Several of us had complete prints >from the late 70s of all the source programs on the system. It was running RSTS/E with Basic Plus. It took a while to find someone with a soft copy of the Basic Plus version of ADVENTure, but I was able to get a copy from someone who was in Project Delta and have loaded that to our RK05 disk image for our simulated 11/40. We would like to get our hands on the real hardware so we can feel the heat and hear the fans whirring once again! Thanks for any and all help that anyone can provide! Ashley

20 years, 8 months

Need help with Atari 1050 disk system

by dave04a＠dunfield.com

>> Thanks for the info - I did a bit of looking and found >> several references once I mentioned "Atari 400" - turns out >> the supplies are AC, which probably explains why your DMM is >> having trouble determining the polarity. > >Interesting - the one I've got here has DC markings on it! Now I'm confused. Really! - is it the original supply? I'd really like to know FOR SURE before I try and power this thing up - I think tonight I will take it apart and look to see if there is an internal rectifier/filter/regulator etc. Btw, Here are some links so the AC references: http://www.vidgame.net/misc_utility/cross_ref.htm http://www.faqs.org/faqs/atari-8-bit/faq/section-35.html http://www.myoldcomputers.com/museum/comp/atari400.htm >The only Atari machine that didn't have DOS built in out of the box was the >400. All the rest from the 800 upwards supported disks because they had the >extra memory and ROM commands. It's a while since I've played with any of my >1050s though, but I know where the disks are if nobody with easier access >comes up first. Can you (or anyone else) tell me how to access the DOS in ROM? Basically, I would like to format a disk and write/read something to verify that the drive is working - as noted previously, I have no diskettes at all for this drive. Regards, -- dave04a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Vintage computing equipment collector.

20 years, 8 months

TRS-80 model 12

by yakowenk＠yahoo.com

I've got a bashed up TRS-80 model 12 sans keyboard, so... Can anybody out there give me the specs for the keyboard connector? Looks like a 5 pin DIN, I guess a serial connection of some kind. I need both the wiring (which pin is which) and the comm specs (baud rate, etc.). It is probably the same as the keyboard for the model 2 and model 16, in case that helps. Alternatively, if anybody has an appropriate keyboard to spare, that would be great too! Also, while I'm asking, can anybody recommend a kind of glue for putting the shell back together? The poor thing took some damage in shipping. It looks like some kind of resin. Acetone did not seem to have any effect on the stuff. I've put a few bits together with "super glue" (cyanoacrylate), but have doubts about it holding very well. Thanks! Bill. __________________________________ Do you Yahoo!? Yahoo! Photos: High-quality 4x6 digital prints for 25¢ http://photos.yahoo.com/ph/print_splash

20 years, 8 months

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test-drb April 2004