test-drb March 2002

test-drb@ccmp.vtda.org

292 participants
932 discussions

A proposal for a definitive URL linc source site

by lgwalker＠mts.net

I've spent some years on the net searching for info on my latest acquisition and how to get it functioning. In the mutitude of sites available some provided useful info on the machine or platform while others simply supplied pictures of a collection. Sources could lead you to a multitude of sites before you found the one that answered your questions, if you were lucky. The problem is the common problem on the net of too much information. Sellams site is a case in point, and IINM my site-list from T3C served as a source for his some of his list. The multitude of sites is just too overwhelming. What would be good is the definitive computer site for each computer or the catagory you're looking for. Jeff Helliges site for the Tandy 2000 http://www.cchaven.com Tim Manns TRS80 site http://www.tim-mann.org/trs80new.html Kees Travers TRS m.II http://home.iae.nl/users/pb0aia/cm/modelii.html Merch's site for the m.100 ( Can't find it in my list.Put it in your sig file Merch) For the CoCo http://zeppelin.tzo.cc/coco/coco.jhtml Tandy 1000 page (can't find it- Red dog page ?) As examples just for the Tandy boxes. comprehensive sites like the PCjr one http://mail.magnaspeed.net/~mbbrutman/PCjr/pcjr.html or any of the PS/2 Mafia pages and the IBM Can site for most models It would still comprise a multitude of info but would point you to the best sources of info on that box you just acquired. And of course generate a bunch of disagreements on the list as to the most authoritive site. Sellams site would likely be the best place to list such a thing as it is well- known and would likely need only a minimum of re-organisation. And of course could have various sections for those into micros, minis, and even mainframes. Rogers site could be a kickoff for Laptops. The main thing would be that the listing was the authoritive site in the opinion of the list, and save a collector from tedius Google searches. Possibly even a rating system could be used. Lawrence Reply to: lgwalker(a)mts.net Love of the Goddess makes the poet go mad he goes to his death and in death is made wise. Robert Graves

24 years, 1 month

Intel RAM - What came when

by gmphillips＠earthlink.net

Can anyone here help me with this. I need to know the sequence that Intel RAM (SRAM and DRAM) was introduced. If you think you know dates, give them. In know that Intel's first RAM was the 3101 SRAM Then came the 1101 SRAM I "think" the 1103 DRAM was next. Then comes... What? I suspect the 2101? Or was it the 2102? Not sure which came first. I think the 2111 and 2112 came after the 2102. Anyway, if you can help, let me know what order you think the Intel RAM was introduced. I've tried figuring this out from the 1977 IC Master but it list everything up thru the 2114 and does not indicate when the chips were introduced. Here's the base numbers I'm interested in. 1101 1103 2101 2102 2104 2105 2106 2107 2108 2109 2111 2112 2113 2114 2115 2116 2117 2118 2125 2148 2149 3101 3102 3104 3106 3107 5101 Also, if you know of any early Intel RAM not listed, please let me know. As always, I am looking to buy any vintage Intel or Intel 2nd source processors, EPROM's, PROMS's, ROM, RAM, or support chips you have, that I don't, that you don't need. In particular, I'm looking for the following: Intel C1701 EPROM Intel C1702 EPROM (not C1702A) Intel C1602 PROM Intel C1602A PROM Intel C3101A in white CerDIP package without visible gray traces. Intel C2704 EPROM Intel C8080 (not C8080A) Eng Samples of Intel 4004 thru 8088 processors. Toshiba TMP9080AC (8080 clone) Mitsubishi M58710S (8080 clone) Early AMD 8080's before AMD started using the AM9080 part numbers.

24 years, 1 month

More Free Stuff: Austin, TX

by mrbill＠mrbill.net

More free stuff (and pictures), for pickup only: Pile of Sun VME boards: http://www.mrbill.net/~mrbill/freestuff/tn/vmeboards1.jpg.html http://www.mrbill.net/~mrbill/freestuff/tn/vmeboards2.jpg.html http://www.mrbill.net/~mrbill/freestuff/tn/memoryboard.jpg.html One DELNI, 8-port AUI "hub"/concentrator? http://www.mrbill.net/~mrbill/freestuff/tn/delni.jpg.html Three GRIDcase 1520/1530 laptops. ONE AC power supply, that works in any of the machines. One has a funky hinge, but still opens. One of them has a nice "PROPERTY OF THE IRS" sticker. 8-) http://www.mrbill.net/~mrbill/freestuff/tn/gridlaptops.jpg.html Again, free for pickup in Austin. Might ship, but you'll have to offer me something in trade if I have to haul this stuff to the pack-n-ship place. Bill -- Bill Bradford mrbill(a)mrbill.net Austin, TX

24 years, 1 month

FREE: Sun VME boards in Austin, TX

by mrbill＠mrbill.net

I've got a pile (seven or eight or maybe more) of Sun VME boards free for pickup in Austin, TX. I know one of them is a 4/6x0 memory board (tons of 30pin slots); i've got a couple of SCSI controllers, some IPI controlelrs, ALM-2 boards, etc. Just cleaning out the closet. Must pick up - WILL NOT SHIP, *unless* you have something nifty to trade (looking for ham radio equipment, etc..) Bill -- Bill Bradford mrbill(a)mrbill.net Austin, TX

24 years, 1 month

FREE: Sun-2 machines in Austin, TX

by mrbill＠mrbill.net

I've got a Sun 2/170 and a 2/120 (one is a big black rackmount cube-ish enclosure, the other is a deskside tower reminiscent of a skinny 3/260), free for pickup in Austin, TX. The /170 will need some cleanup and TLC; the /120 just needs a monitor cable (9pin mono monitor; an all-wires straight-through 9pin serial cable works fine), keyboard cable, mouse, and mouse pad. WILL NOT SHIP. You will need to come pick these up. Bill -- Bill Bradford mrbill(a)mrbill.net Austin, TX

24 years, 1 month

2 qbus cards available

by William.King＠dadaboom.com

I have the following two boards which I like to dispose of. Free to a good home, as long as you don't put them up on eBay. Buyer pays shipping, let's say $5.00 each. 1. Computer Products Model 312 w/cabinet kit. I believe this is a DHV11 clone (dual width, qbus). The cabinet kit has 8 DB25 connectors. 2. Simpact Assocates, Inc. ICP 1622 Comm (quad width, qbus). I have no idea what this card is, but it does have a socketed DEC 21-17311-01 chip on it (which I believe is the bus interface.) I imagine that it is a communications card of some sort. Both cards are untested and shipped as-is. The ICP 1622 was pulled from a working system, so I'd guess that it works. The other arrived with a pile of equipment, so I have no idea about it's status. Bill

24 years, 1 month

Open systems: was DEC kidding about itself?

by gunther＠aurora.regenstrief.org

Hi found this funny t-shirt being auctioned on ePay: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2008676061 What I don't quite understand is what message this t-shirt was supposed to convey, so I just thought may be I should take it literally. And so I did :-) See here: http://aurora.regenstrief.org/VAX/open-systems.jpg regards, -Gunther -- Gunther Schadow, M.D., Ph.D. gschadow(a)regenstrief.org Medical Information Scientist Regenstrief Institute for Health Care Adjunct Assistant Professor Indiana University School of Medicine tel:1(317)630-7960 http://aurora.regenstrief.org

24 years, 1 month

VAX 6400 booting saga: A scary story with a happy ending.

by gunther＠aurora.regenstrief.org

Hi, let me share a frightening story with you that I lived through while my family had naptime. I decided to try out Isildur's idea of booting Ultrix using a KA62A processor in the hope that that would be supported right off the 4.5 boot tape. And I just happened to have one such T2011 board in a box (taken off a lonely 6310 in a barn full of bird-poop.) So, I took all 6 KA64As out and stacked them on some papers that I use to pack most of my boards (with papers between the boards so they would not stick together :-). Put the KA62A in and fired up. A lonely light lit and no real function was to be observed. I moved all 4 MS65A-DA boards out too, because I figured that may be a KA62A doesn't know how to deal with MS65A-DA. I swapped in some of those T2014 that seem to multiply while stored in the box. Anyway, it still wouldn't work. The self test progress report shows that the CPU detects no memory and then it reports that problem explicitly and stops. The CPU error status lights say hexadecimal C0. I could not find any table explaining what C0 status code is. It could be boring (like "no memory found", which I know) or it could indicate some condition that I could fix, like "backplane wiring error" :-). I stuffed the whole XMI bus full with those 32 MB cards in the hopes that one would work, but to no avail. So, perhaps the memory access path in that CPU board is broken? Is there any rewiring to be done when converting a 6400 down to a 6200? Anyway, my daughter came downstairs indicating naptime was over and so it was time to finish up. KA62A and all MS62A back in the box and all 6 KA64As and 4 MS65A-DA back into the bus fired up and all processors were indicating they were somehow not agreeing who would get to be the primary CPU. Hit reset and they figured it out. But now they were bitching about memory and the CPUs showed minuses in the selftest monitor. Rearranged the CPUs and the memory, still no good luck. Everything was screwed up! I was afraid I had killed all my boards by careless handling (I did this before, may be not with that polyester pullover that might have sent static sparks, like they do.) Took all but one CPU out and that did do the self test OK. But one MS65A board seemed broken. It failed regardless which slot I put it. Finally I took it all out. Then the CPUs back in and again it didn't work. I then put CPUs back one by one powering up each time to see progress. Slowly, one by one, the number of board which I thought I had killed reduced down to 1, the memory board. The order in which I put in the CPUs and the restarting every time seemed to be important. Then, finally I even found one configuration of the memory boards where all 4 were detected and tested fine. Hey I was so scared I had killed half of my VAX through carelessness. But I didn't. I am quite confused why it is all so finnicky about the order of installing the hardware. I won't mess with this machine's XMI configuration any time soon. regards -Gunther -- Gunther Schadow, M.D., Ph.D. gschadow(a)regenstrief.org Medical Information Scientist Regenstrief Institute for Health Care Adjunct Assistant Professor Indiana University School of Medicine tel:1(317)630-7960 http://aurora.regenstrief.org

24 years, 1 month

Today's Apple brag

by spectre＠stockholm.ptloma.edu

Today's brag: a Woz IIgs with 20MB Applied Ingenuity internal HD and 1MB RAM card. I transferred the hard disk, cover (*smirk*) and RAM card to my 1MB ROM 03 IIgs, and now I have a faux Woz with ROM 03 firmware, a 20MB disk with 6.0.1 on it and 2MB of RAM. Now all I need is a CPU upgrade and a good modem ... The G3 for the PowerBook 1400 also arrived today too and that was almost as much fun. :-) -- ----------------------------- personal page: http://www.armory.com/~spectre/ -- Cameron Kaiser, Point Loma Nazarene University * ckaiser(a)stockholm.ptloma.edu -- The fastest way to fold a map is differently. ------------------------------

24 years, 1 month

Transmitter (Was: RE: OT Mitsubishi Monitor Weirdness)

by Mzthompson＠aol.com

On Sat, 9 Mar 2002; "Davison, Lee" <Lee.Davison(a)merlincommunications.com> wrote: > > As an example, I use to work on some navigational > > transmitters with power output of a few hundred watts. > > There was a test jack for sampling the RF output and you > > hooked a scope to the jack. The gotcha was when you > > hooked the coax cable to the transmitter first instead of > > the scope. If you did that, the transmitter went down > > within seconds. > This is rot! No it's not. I know of a couple technicians who goofed and caused it to happen. > On a transmitter with even a few watts output the > RF probe coupling would be -10dB or more, so even an open > or short on this would give a return of -20dB. This is so > small it can be ignored, in fact many antenna systems aren't > that good. I agree with what you say here, even for the vintage of the transmitters. They were built in the 40's & 50's. It was even fascinating to see how the technology worked. To modulate a portion of the RF with low frequency (ranging from 30 to 90 hz) there was two RF coupling loops with a specially designed fan blade spinning between the loops. This changed the amplitude of the RF coupled from one loop to the other. You can probably imagine the fascination of some technicians when we swapped out this vintage tube type monsters with state-of-the-art-neato solid state units. Got questions from the some of the old timers 'Duh, it taint got no moving parts, how does it modulate the carrier?'. > As a termination a scope is a very poor match for any low Z > RF source it's impedance being 1Mohm or more so it > wouldn't matter if you plugged it in or not. Also most test > gear can't absorb any ammount of watts for any length of > time, so if the port was a high power snif it would have to be > terminated at the port with a high power attenuator which > gives a good match regardless of it's terminating Z. Because of the vintage of the equipment and operating in the VHF band (108-118 mhz), we had special scopes that that had a special RF input section that could handle a few watts. This was what we used to check the modulation pattens and the like. > > The open circuit at the other end of the coax got > > reflected back to the transmitter as a low > > impedance and detuned it, and the monitoring circuits > > would detect the detuning and pull the plug. > This depends entirely on the wavelength length of the > coax. Did you use an exact odd multiple of 1/4 wavelength > coax every time? Yes, it was required for use with the scope. > can you remember the make/model of these transmitters? Nope, I have slept since then. They were all special designed for the government. In fact when they were replaced with solid state units (1980's), we had orders to destroy the old ones. They did not want them on the surplus market where they might show up in operation later. I do remember now, one model was built by Wurlizter (sp?), yep, the electronic organ folks. And now, I would like to apologize to the list. While this meets (and exceeds greatly) the 10 year guideline, it would not by any stretch of the imagination 'compute'. I was simply trying to point out the need for proper termination of a circuit, regardless of where the circuit is and what it does. Forgive me. Mike

24 years, 1 month

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test-drb March 2002