- test-drb@ccmp.vtda.org - classiccmp.org

Poor contact repair (was: Re: The pure *hell* of restoring a PDP-8/S desktop.

by dburrows＠netpath.net

>Yes, I forgot to warn people. The oils in silicone grease >do evaporate slowly over time but there is almost nothing >that will fully remove it. I have had reasonable results >using Brake Clean but you have to be careful >with this also. It dissolves many plastics and most paints. >It is highly toxic and should be used in ventilated >areas only. > Don't get the grease on anything you don't want it on. >A little of the stuff goes a long way. >Dwight Another warning. Be very careful using chlorinated solvents near electrolytic caps. One of the labs I used to service did some studies on why one of their customers was having a high failure rate with the ends popping. They found the solvent they were using for flux removal was the cause. It broke down the seal at the vent hole. The caps were never in direct contact with the solvent - just the vapors were enough. Dan

26 years, 2 months

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Poor contact repair (was: Re: The pure *hell* of restoring a PDP-8/S desktop.

by mtapley＠swri.edu

Allison wrote: >Warning... Silicone grease is persistant stuff and one on what ever >it's very hard to remove. So a board that requires soldering need >that done FIRST then wipe the fingers with a thin film. True. The Contamination Engineer on the NASA program I'm working on swears by "Simple Green", a widely available (grocery-store) detergent, for removing silicon grease. She recommends the clear, unscented version of it, which she uses on our flight hardware. She still hates silicone greases/oils/release agents, though, because it *is* hard to get off once it's on, and it does tend to flow/spread all over anything it's put on. - Mark

26 years, 2 months

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free machines in Woodbridge VA

by yakowenk＠cs.unc.edu

BTW, if you live in the Woodbridge area, and would be willing to help in the rescue by picking up, packing up, and shipping things to people who are interested but not proximal enough, drop me a line. It seems safe to assume that interested parties will be willing to pay shipping costs, at least. (I'm a few hundred miles away, so I can't reasonably do it.) Thanks, Bill. > Date: Tue, 8 Feb 2000 15:49:42 -0500 (EST) > From: Bill Yakowenko <yakowenk(a)cs.unc.edu> > Subject: free machines in Woodbridge VA > > Hey all, > > Once upon a time, I wrote asking for volunteers to rescue some machines > in Woodbridge VA. There was a PDP-11/34 that got rescued, but there > is still a big pile up there that is headed for the scrap heap unless > somebody picks it up. Of course, the remainder is mostly PC > crap^H^H^H^Hstuff, but some of it is old enough to be of possible > interest. > > Let me know if you're interested. (The guy dumping this stuff really > would like it to find good homes, but he still doesn't want to be > overrun by dozens of requests, so I'm still trying to coordinate things.) > > Without further ado, here's the list brought back by our recon guy, > Al Corda <applause>. Some of it may be gone by now, but most is > probably still there: > > > ] As of today (1/10/00) items of interest I have identified > ] include the following: > ] > ] 3 or 4 Gen-u-ine DEC VT100s (some with keyboards! :-) > ] > ] A number of IBM XTs (Yeh, I know, but I included them for > ] completeness :-) > ] A number of IBM ATs (Just plain ATs, no AT370s or AT3270s (so far)) > ] > ] 2 Compaq Plus Luggables > ] > ] A bunch of LaserWriter II printers in various states of repair > ] A bunch of Spinwriter printers of various makes. > ] > ] 2 Photocopiers (1 Canon Npf-270, one Xerox (not certain of model)) > ] > ] A bunch of PC monitors, mostly monochrome or CGA (no VGA as far as I > ] could tell) > ] > ] A couple of cases of various PC software from the early 90's > ] (stuff like RBASE, etc.) > ] > ] 3 or 4 large _HEAVY_ units that on brief inspection strike me as > ] UPS (or line conditioner) units. No manufacturers markings were > ] obvious (but I wasn't going to try to turn one over. My back is > ] worth more to me than any UPS.) > ] > ] Piles of office telephones, Old modems, Various unidentifiable > ] electronic assemblies of dubious origin, Boxes and boxes of cables, > ] wire, etc. > > Cheers, > Bill. > > > PS. I've been _way_ behind on answering e-mail lately, so remind me > in your reply that this is time-sensitive, and that machines will > get crushed if I nap. :-/

26 years, 2 months

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Product review websites?

by cfandt＠netsync.net

Hi group, I've been hunting for a new CD-ROM drive and a 4-6 Gig hard disk for a PC box. So far I've not found any decent websites who have *objective* reviews of these products between different manufacturers. For example, I _don't_ think I want another Creative brand CD-ROM as the one I put in my son's box died after less than a year. I can't spend too much $$ as I'm just getting back to work (finally) and am a bit dry, so low-to-moderate cost devices would be okay as this isn't a mission critical application. Reasonable reliability is an important factor (e.g., the thing lasts for 2+ years). Any thoughts? Please reply offline as this is definitely off topic. Many thanks for your wisdom! Regards, Chris -- -- Christian Fandt, Electronic/Electrical Historian Jamestown, NY USA cfandt(a)netsync.net Member of Antique Wireless Association URL: http://www.antiquewireless.org/

26 years, 2 months

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Schematic capture/PCB design software

by edick＠idcomm.com

Well, the package I got from MicroCode was supposed to be a "full-up" version and after I called inquiring about the libraries, I was told "that's all there is, there 'aint no more" at which point I gave up on them. We all get attached to our tools, and I am not trying to pass any sort of overall judgment on their product. However, I do believe that the EAGLE package, though it is not terribly easy to learn either (takes about an hour plus the "easter egg hunt" for the various components and proper package outlines, particularly connectors and passives, the commercial version seems to be pretty adequate at a price about half that asked for the MicroCode package. While you do have to read the documents, the autorouter is about as good as any I've seen in the under-$10k category. That makes a big difference to me, since I work at the "front end" of a project, taking the notion form concept to prototype. I don't like to hunt extensively through libraries as I have to do with the EAGLE v3.55 package, but it's free, after all. and little boards of about 3-1/8" x nearly 4" work fine much of the time for my little one-of's. My normal approach is to enter a particular schematic, the same one for every software package I evaluate, and if that works OK, I try to route it. In the case of CircuitMaker, the first 5 devices were not available, so I gave up. That's over half the parts. When I checked with the Tech SUpport guys, they told me the libraries I had been sent were complete and no revisions or additions were planned at that time. The version-3 OrCAD did, indeed have a timing simulator. It's called OrCAD VST, having to do with verification and simlation. There's also a PLD and a PCB package. The schematic capture part is SDT. It also provides an on-line link to PSpice, v3.xx and beyond, from within the schematic capture package. If I were buying a low-end schematic and PCB software suite, I'd certainly look at EAGLE before I look at MircoCode stuff again, but that's as much because of the cost difference as it is due to the library shortfall. Needless to say, these are my opinions and inclinations. YMMV Dick -----Original Message----- From: Bruce Lane <kyrrin(a)bluefeathertech.com> To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org> Date: Wednesday, February 09, 2000 12:41 AM Subject: Re: Schematic capture/PCB design software >At 23:36 08-02-2000 -0700, you wrote: > >>I've got a sample package of CIrcuitMaker and TraxMaker and found it >>wanting, particularly in simulation models and device symbols. > > It would be. I don't believe Micro Code includes full libraries with the >sample versions. > >>would use the same package and symbol. They had nearly no AC or ACT parts >>represented, nor did they have BCT or F library components. Since you're >>paying for a simulator, there ought to be correct models for 7400, 74L00, >>74H00, 74C00, 74S00, 74LS00, 74AC00, 74ACT00, 74AHCT00, 74ACT00, 74AHCTLS00, > > A basic simulator at the digital level only looks at on/off states. That's >really all it has to do. Since all the parts you've listed above perform >EXACTLY the same function, and have the same symbol, I don't see why the >library has to include every possible variation on one part. > > FWIW, the current version of CircuitMaker Pro includes the following for >2-input NAND gates: > > 4011, 4093, 74F00, 74F132, 74F37, 74LS00, 74LS132, and 74LS37. > > While I agree that CM does need some help with their library, notably in >the more exotic components such as tunnel diodes, I have found it adequate >for my needs. The version of OrCAD you refer to only does schematic >capture, if I recall correctly, and has no simulation capabilities. > >>and so on. There ought also to be plenty of models for CMOS parts starting >>with 40xx, 44xx, 45xx, and a goodly number of 7300 and 7600 series parts. >>OrCAD had all that back in the mid-80's. They no longer offer that much >>coverage, owning to the increased knowledge of the user community, which >>would merely point out all their errors. > > I'm not sure I understand that last statement. If the omission of >components is itself an error, why would the "user community" not point it >out and ask for better coverage? > > Also, have you considered that there may be another reason? Specifically, >that the advancing state of technology where ICs are concerned has made >such wide varieties of parts unnecessary to accomplish a given task? > > To be perfectly honest, I've never heard of the 7300 or 7600 series parts. >I do know of TI's 75xxx series, which were line drivers/receivers, but I'm >curious about the ones you mention. > > Anyway, I feel that what CM lacks in library coverage is made up for in >other features. Also, there is nothing keeping you from adding to the >library. One can create their own SPICE models, though this is not >generally a trivial task, and I know there's at least one software package >available that lets you input specs from a databook and have it output a >SPICE model. > >>Have you found otherwise? > > As I've said: I've found that it serves my needs. I feel that it was a >good investment for the price I paid. Do I feel that most EDA software is >overpriced? Yes. Would I recommend CM and TM for any application? No. There >are better packages, but most are well beyond the hobbyist price range. > > Is there a need for an EDA package with better 'legacy' parts support? I >think so. I will continue to bug Micro Code about improving CM and TM along >those lines. In fact, we're probably due for an update this year. > > The bottom line is that a question was asked of the list members, and I >gave my opinion in response. The 'Free' packages simply do not suit my >needs. If they suit the needs of others, great! I was merely offering one >option out of many. > > >-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- >Bruce Lane, Owner and head honcho, Blue Feather Technologies >http://www.bluefeathertech.com // E-mail: kyrrin(a)bluefeathertech.com >Amateur Radio: WD6EOS since Dec. '77 >"Our science can only describe an object, event, or living thing in our >own human terms. It cannot, in any way, define any of them..."

26 years, 2 months

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Poor contact repair (was: Re: The pure *hell* of restoring a PDP-8/S desktop.

by allisonp＠world.std.com

<I'll have to try that. I guess, everyone has their own way of fixing bad <solder contacts. I've used the method I described over the past 16 years o <dozens of old mini computers... never had one come back because of problem <caused from the chemicals I use...< < <john Warning... Silicone grease is persistant stuff and one on what ever it's very hard to remove. So a board that requires soldering need that done FIRST then wipe the fingers with a thin film. If you get Silicone grease on something you dont want it on a it takes a lot of P11 (tetraflurocloroethane) solvent to get it off and trying to cook it off with the iron will not win due to very high temperature resistance of the stuff. Stuff like ethanol and Isopropanol (alchohols) will not touch it. Most quality contact cleaners that have a lubricant have some silicone in them. Allison

26 years, 2 months

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How far can you reach in a dumpster?

by CLASSICCMP＠trailing-edge.com

> You must be a lot taller than I am. I jump up on the side and lean right >in. My favorite technique is to back my car up to the dumpster, pop the trunk open, climb on my bumper then into the dumpster, and start sorting and tossing the good stuff into the trunk. A good number of the PDP-11 freeware tapes in the archives were rescued that way :-). Tim.

26 years, 2 months

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How far can you reach in a dumpster?

by jolminkh＠nsw.bigpond.net.au

-----Original Message----- From: Mike Ford <mikeford(a)socal.rr.com> To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org> Date: Wednesday, 9 February 2000 22:23 Subject: How far can you reach in a dumpster? My answer: Until it's too high to climb out again ! Ever since I found a PDP/8L in one a few weeks ago anyway.

26 years, 2 months

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The pure *hell* of restoring a PDP-8/S desktop.

by dylanb＠sympatico.ca

Two weeks ago I *had* restored it.... and about every half hour it would break down with a different problem. I am posting this message in the hope that if anyone else ever has to restore such a nasty transistor mini then they can use this as a reference for *everything* that can go wrong with a minicomputer (excluding the power supply). First, the best methods I have found to eliminate the main problems in the most stubborn transistor minicomputers: 1) Bad contacts on backplane - Spray it with "Engine Gunk" (seriously, an automotive engine degreaser/cleaner), then stick a plain extender board with cloth wrapped around contacts and insert/remove a couple of times. Then use contact cleaner. 2) Weak Transistors - Lower the power supply voltage enough that poor transistors start to fail. 3) Thermal Transistor Breakdowns - (these are the Fairchild transistors that *always* fail due to the epoxy inside expanding and breaking contact). I recommend leaving the minicomputer on for 5 hours and let the poor transistors completely fail. Nothing worse than an intermittent one. BTW, I had 18 Flip Chips filled with this problem :-( (thanks for the info Allison!) 4) Intermittent Flip Chips - These occur in areas where the mini is running hot (ie: The MB register) and cause poor solder contacts which *might* be visible. I recommend pulling these altogether and replacing them. 100s of ticking timebombs. Get rid of all of them before you go insane. Use a digital thermometer and check for areas in excess of 115 degrees F (35 C). In the last 3 transistor minicomputers I have restored over the past 5 months I have found you will get a lot more intermittents if the mini was used *a lot* (ie: 12 years) and was stored in an area that varied greatly in temperature. 5) Expect your prints not to contain a complete schematic of the mini computer - I have found many changes to the straight-8, PDP-8/S that were not listed in FCOs but instead new prints were issued. (1960's) COMMON PDP-8/S Problems I have found: Since the speed at which data is switched through the PDP-8/S is *much* faster than the Straight-8 expect problems and replace/resolder the major registers and *ALL* pulse amplifiers. Most pulse amplifiers are switching at the maximum speed for such a Flip Chip (R602,603) so the slightest addition of resistance caused by a poor solder contact will cause endless problems. This PDP-8/S had the following problems (beyond the ones I mentioned before) Saul Dinman decided to add a *new* interrupt called "LPC", Low Power Condition. It will look like a negibus device interrupting the CPU but in fact is a few gates wired to the power monitor board. Of course, it only affects *PARTS* :-( of the CPU like... Parity! ,ION, and other nasty *bugs*. As the original 8/S did not have this installed it was not included in original prints :-(. I now found a third set with these mods... after spending a couple of hours pulling my hair out. After polling for interrupts and a memory parity error it is safe to conclude it is a low poer condition. Thanks Saul! Of course, everything else *only* failed when the CPU was running a program.. It's OLD instruction set was: ========================================= ION when an external device draws *just* enough power when being accessed to cause an LPC rather than an IO Interrupt :-(. Clear Accumulator Sometimes - (external device control) when warm and only when running a program and oscilloscope is not connected. Move AC->MB , 99 out of 100 times asked to. Stall CPU Clock 1mS - no longer or it might be seen without scope. and my favorite... If Zero, Branch Sometimes - BUT branch always in SI mode. ========================================================================= The PDP-8/S has now been running for over 6 hours and every major "bit" junction has been checked for a poor signal - all Fairchild's removed and buried. The desktop 8/S is a micro-sauna which means I will probably install fast boxer fans in place of the two eggbeaters currently installed in the back. My rackmount 8/s has 4 fans along the sides of the boards + 2 blowers, one above and one below. I am installing a 20ma->RS232 converter and will get this mini connected to Telnet with FOCAL loaded as quickly as I can. This mini needs a good month of continuous running to make sure it is finally... happy. PAPER TAPE: If anyone here is using a PC0 with a PC01 controller (Straight-8, or 8/S) I found internal mods used at DEC to increase the read speed from 300CPS to 650CPS... error free! 8/S *really* loads FOCAL fast now! I hope when I get a KA10 it isn't filled with the nasty problems this one had. john PDP-8 and other rare mini computers http://www.pdp8.com

26 years, 2 months

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Schematic capture/PCB design software

by edick＠idcomm.com

Please see comments below. Dick -----Original Message----- From: Bruce Lane <kyrrin(a)bluefeathertech.com> To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org> Date: Tuesday, February 08, 2000 8:02 PM Subject: Re: Schematic capture/PCB design software >At 17:11 08-02-2000 -0000, you wrote: > > <snip> > >>Anyway, what came of that discussion and what were the recommendations for a >>good free package? > > <snip again> > > Unfortunately (for my needs at least) most of the "free" packages have too >many limitations to be useful. I had an old DOS version of OrCAD/SDT once, >and it did serve me well for some years. Thanks to having it, I was able to >do a "competitive upgrade" to Micro Code Engineering's CircuitMaker Pro and >TraxMaker Pro (about USD $700 or so for the pair). > > So far, it has proven to be a good investment. The digital simulation >functions saw me through some tough problems in one of my classes, and >produced output that had both my instructors raising their eyebrows. > > I'll be happy to answer any questions if you want to know more. > I've got a sample package of CIrcuitMaker and TraxMaker and found it wanting, particularly in simulation models and device symbols. When I got OrCAD in the mid-'80's they covered over 90% of the TTL and CMOS devices available. By comparison, I'd say I found these two to be lacking about 90%. It's really not a problem with their libraries, but with how they're managed. They build a symbol for 7400, say, but there's no guarantee there's a corresponding symbol for the 74HC00 or 74S37, which would use the same package and symbol. They had nearly no AC or ACT parts represented, nor did they have BCT or F library components. Since you're paying for a simulator, there ought to be correct models for 7400, 74L00, 74H00, 74C00, 74S00, 74LS00, 74AC00, 74ACT00, 74AHCT00, 74ACT00, 74AHCTLS00, and so on. There ought also to be plenty of models for CMOS parts starting with 40xx, 44xx, 45xx, and a goodly number of 7300 and 7600 series parts. OrCAD had all that back in the mid-80's. They no longer offer that much coverage, owning to the increased knowledge of the user community, which would merely point out all their errors. Have you found otherwise? > >-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- >Bruce Lane, Owner and head honcho, Blue Feather Technologies >http://www.bluefeathertech.com // E-mail: kyrrin(a)bluefeathertech.com >Amateur Radio: WD6EOS since Dec. '77 >"Our science can only describe an object, event, or living thing in our >own human terms. It cannot, in any way, define any of them..."

26 years, 2 months

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New list - "PDP-archives"

by CLASSICCMP＠trailing-edge.com

Hi Folks, You might remember me, I'm the guy who maintains the PDP-11 software archives at http://metalab.unc.edu/pub/academic/computer-science/history/pdp-11/ and the PDP-10 software archives at http://pdp-10.trailing-edge.com/ In order to maximize the utility of these archives to users, as well as to encourage discussion of the archives (as in, "Hey, I just found a really neat Battleship game for my PDP-10"), I've formed a new mailing list: "PDP-archives". It will be for the discussion not only of the above archives, but also for discussion of other archives and general topics about how to best archive and distribute old PDP-8, PDP-10, and PDP-11 software. (Other PDP-nn software is welcome too, of course!) To subscribe, send an E-mail request consisting of the line subscribe PDP-archives to PDP-archives-request(a)mudd.trailing-edge.com Alternatively, visit http://mudd.trailing-edge.com/mailman/listinfo/PDP-archives and sign up using the web interface. See you on the list! -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927

26 years, 2 months

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Electrolytic capacitors and other picture postcards.

by bill＠chipware.com

Well, my OSI C3D is currently non-functional. Here's what happened: I've been testing and repairing a number of OSI 48-pin bus cards using the C3. This has required a large number of power cycles. Also, several cards caused the PS fuse (2A, 250 volt, glass cartridge) to blow. In each case, this problem was corrected by replacing the electrolytic caps on the offending board. OSI used 47 microfarad, 16 volt ecaps (ecaps... is this a good abbreviation? I'm getting tired of typing "electrolytic") pretty much exclusively. I could not find a source for these, so I used 47mf, 36 volt ecaps as replacements. This seemed to work OK. I finished working on the other cards and tried to bring up the machine with just the original cards. The fuse blew. Grrr... I pulled all of the cards, replaced the fuse and tried them one at a time. Sure enough, the CPU card (the model 510, triple CPU card with 6800, 6502 and 8080) was the culprit. I replaced its two ecaps as per above. It came up, rebooted once OK, started to get flakey and now won't come up at all. Is my understanding of ecaps correct? That is, as long as the capacitance is correct, the voltage is greater or equal to the required load and it is installed "right way around" it should be OK? There is so much logic on this board, a lot of it 8Txx, I hope I haven't blown a chip. It would take me a month to find it and who knows if I could get a replacement. Thanks, Bill Sudbrink

26 years, 2 months

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site for old Mac/Lisa SW

by Marion.Bates＠dartmouth.edu

A non-text attachment was scrubbed... Name: not available Type: text/enriched Size: 347 bytes Desc: not available Url : http://www.classiccmp.org/pipermail/cctalk/attachments/20000208/f00b2dd2/at…

26 years, 2 months

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HP 3000 MPE V: notes on Y2K Safe release

by ss＠allegro.com

Hi, If you have a Classic HP 3000 (any two-digit model #), and if you received the "Y2K Safe" release of MPE recently, and if you haven't installed it yet, I have some notes that you should find interesting. (If you didn't get your Y2K Safe MPE V (which was free!), email Allan Hertling at allan_hertling(a)hp.com) 0. 3P Patches? -------------- If your goal is to get Release 40 installed, you don't need to bother with the 3P patches you may have received. I simply installed 3P, and then did the Turbo Update to Release 40, and then installed the Release 40 patches. 1. TUINSTAL Y2K bug ------------------- The Turbo Update mechanism has a Y2K bug in it. TUINSTAL builds the file TUSYSDMP, which builds a new SL and tries to create a SYSDUMP tape with a partial backup. If run today (8 Feb 2000), the partial backup would be specified incorrectly as 2/8/0 ... and STORE (which is used by SYSDUMP) doesn't accept a single digit year. Workarounds: 1) change system date to 1999-12-31 before running TUINSTAL (note: you may have to purge TUSYSDMP if it's already been built) or 2) edit TUSLINFO prior to running TUINSTAL and change the line towards the end with "$$/$$/$$" to "02/04/00" (or some such) ...note: I haven't tested to see if TUNINSTALL will complain if it can't find the $$/$$/$$ line. 2. Release 40 Patches --------------------- There are 7 patches on the Release 40 patch tape. Accompanying the tape is a list of the patches ... these are also the names of the files to stream to install each patch! Notes: 1) Be sure to restore the patches into PATCH.TELESUP! (They're on the tape as @.PATCH40.TELESUP) 2) Don't rely on setting LIMIT to 1! Each job has a ";HIPRI", and each builds a new file called "PATCH1JJ" (or some such), and streams it with HIPRI! I.e., it you attempt to minimize your time at the console by streaming all the jobs at once, you'll regret it! (Been there, done that :) 3) INFDVA7B and TRVDVA8B both replace RAPID000.PUB.SYS ... the latter with a bigger file than the former. My *guess* is that TRVDVA8B should be installed second. 4) BBRDVA1B, RPRDVB0A, and SIMANY5B each build a new SYSDUMP tape and require a coldload. I streamed the other 5 jobs first (one at a time), then did: stream BBRDVA1B COLDLOAD from the tape stream RPRDVB0A COLDLOAD from the tape stream SIMANY5B COLDLOAD from the tape did a manual SYSDUMP with date 0 and "@.@.@" If you're ambitious, you could combine the three patches into one job (with one sysdump/coldload) 3. Disk Space ------------- I didn't want to risk my existing disks/system, so I bought a used Coyote (HP 6000 670H ... 670 MB?), and setup a single disk system. After installing just the 3P FOS tape, FREE5 reported 2,348,785 available sectors (573 MB) ... before installing the SUBSYS tape! After going to Release 40, installing the subsystems, and installing the Release 40 patches, I have about 1,600,000 sectors free (383 MB). Stan Stan Sieler sieler(a)allegro.com www.allegro.com/sieler/wanted/index.html www.allegro.com/sieler

26 years, 2 months

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Poor contact repair (was: Re: The pure *hell* of restoring a PDP-8/Sdesktop.

by dylanb＠sympatico.ca

<snip> >I'll have to try that. I guess, everyone has their own way of fixing bad >solder contacts. I've used the method I described over the past 16 years on <snip> I DID NOT MEAN BAD SOLDER CONTACTS... I meant poor contacts between a backplane and a board. I'm still having "bad solder joint" flashbacks after restoring my second PDP-8/S.... I hope they go away in a few days ;-) john PDP-8 and other rare mini computers http://www.pdp8.com > >john > >PDP-8 and other rare mini computers > >http://www.pdp8.com > >> >> > >

26 years, 2 months

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The pure *hell* of restoring a PDP-8/S desktop.

by allisonp＠world.std.com

<silicone grease and still functioning with out a <hitch after 25 years. Their contact resistance still <measures less then the original dry contact resistance. <I put silicone grease on the contacts of the USART <socket, in my Poly88, back in 1979, to fix a flaky contact. Perfectly reasonable thing to do to protect the metals from contact with air and resulting corrosion. Allison

26 years, 2 months

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[CC] Clarifying my "Wanted" posting.

by netsurfer_x1＠hotmail.com

First off, here is my original posting: >I am looking for a copy of the old Macintosh speech synthesizer program >called "Smooth Talker" from First Byte. I had this program >on a floppy >that my electronics teacher gave to me last year, but >the floppy has since >worn out & I have been searching *everywhere* >for a copy, but to no avail. >If you have a copy, *do not* send me a >disk image, as my Mac (original Mac >upgraded to Mac Plus specs.) >does not recognize them at all. I must ask, >however, that it come on >an 800K floppy, 400K is not enough space! > >I am looking for a driver for aforementioned Macintosh for an Apple Color >Stylewriter 2400. I don't want that printer to be reduced to >dust magnet >status! Clarification: I am looking for the aforementioned drivers/programs *on a disk*, *NOT* as a disk image! Disk images are totally useless to me, & my Mac does not like them *at all*. I tried to make a disk image once, but it didn't work. ____________________________________________________________ David Vohs, Digital Archaeologist & Computer Historian. Computer Collection: "Triumph": Commodore 64C, 1802, Double FDD, GeoRam 512, Okimate 20. "Leela": Macintosh 128 (Plus upgrade), Nova SCSI HDD, Imagewriter II. "Delorean": TI-99/4A. "Monolith": Apple Macintosh Portable. ____________________________________________________________ ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

26 years, 2 months

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Poor contact repair (was: Re: The pure *hell* of restoring a PDP-8/S desktop.

by dylanb＠sympatico.ca

<snip> >Why does every one think I'm talking about petroleum >grease. Many high power connectors are protected with >silicone grease and still functioning with out a >hitch after 25 years. Their contact resistance still >measures less then the original dry contact resistance. >I put silicone grease on the contacts of the USART >socket, in my Poly88, back in 1979, to fix a flaky contact. >I have had no reason since then to add more. I used >the Poly88 just last week. If I'm addicted, it is just >for new applications. >Dwight I'll have to try that. I guess, everyone has their own way of fixing bad solder contacts. I've used the method I described over the past 16 years on dozens of old mini computers... never had one come back because of problems caused from the chemicals I use... john PDP-8 and other rare mini computers http://www.pdp8.com > >

26 years, 2 months

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The pure *hell* of restoring a PDP-8/S desktop.

by dylanb＠sympatico.ca

-----Original Message----- From: Mike <dogas(a)leading.net> To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org> Date: Tuesday, February 08, 2000 4:43 PM Subject: Re: The pure *hell* of restoring a PDP-8/S desktop. >>From: John B <dylanb(a)sympatico.ca> >> >> <big snip of transistorized pdp-8 restoration tips> > >That was great. I dont even have an 8 of any kind but I enjoyed reading the >pointers and learned alot with that one. Thanks. It's one of the reasons I >like this list (and I hope one day to have to dig that note up from an >archive to help a machine that's near... ;) Keep it up! > You're welcome, and I really hope you find one. Out of the dozens of different mini computers I have restored for collectors, I have never found one as fun to restore as the PDP-8/S. What else can you run hundreds of different programs and languages on only 1001 transistors and 73 light bulbs? (and pretty quick too ;-) ).... Oh, and using "general purpose" Flip Chips?There are only 3 custom boards inside the 8/S: the front panel switches, the front panel lights, and the power monitor flip chip (W506). Even the core memory used general purpose slicers/diff. amps found in DF32 DISC and Magtape units! (okay, So Saul was desperate to use easily accessible Flip Chips... ). Well, back to the grind... I have to restore some PDP-11/20 minis now :-( Hope you find I *really* cool mini! john PDP-8 and other rare mini computers http://www.pdp8.com >Cheers >- Mike: dogas(a)leading.net > > > > >

26 years, 2 months

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The pure *hell* of restoring a PDP-8/S desktop.

by dogas＠leading.net

>From: John B <dylanb(a)sympatico.ca> > > <big snip of transistorized pdp-8 restoration tips> That was great. I dont even have an 8 of any kind but I enjoyed reading the pointers and learned alot with that one. Thanks. It's one of the reasons I like this list (and I hope one day to have to dig that note up from an archive to help a machine that's near... ;) Keep it up! Cheers - Mike: dogas(a)leading.net

26 years, 2 months

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free machines in Woodbridge VA

by yakowenk＠cs.unc.edu

Hey all, Once upon a time, I wrote asking for volunteers to rescue some machines in Woodbridge VA. There was a PDP-11/34 that got rescued, but there is still a big pile up there that is headed for the scrap heap unless somebody picks it up. Of course, the remainder is mostly PC crap^H^H^H^Hstuff, but some of it is old enough to be of possible interest. Let me know if you're interested. (The guy dumping this stuff really would like it to find good homes, but he still doesn't want to be overrun by dozens of requests, so I'm still trying to coordinate things.) Without further ado, here's the list brought back by our recon guy, Al Corda <applause>. Some of it may be gone by now, but most is probably still there: ] As of today (1/10/00) items of interest I have identified ] include the following: ] ] 3 or 4 Gen-u-ine DEC VT100s (some with keyboards! :-) ] ] A number of IBM XTs (Yeh, I know, but I included them for ] completeness :-) ] A number of IBM ATs (Just plain ATs, no AT370s or AT3270s (so far)) ] ] 2 Compaq Plus Luggables ] ] A bunch of LaserWriter II printers in various states of repair ] A bunch of Spinwriter printers of various makes. ] ] 2 Photocopiers (1 Canon Npf-270, one Xerox (not certain of model)) ] ] A bunch of PC monitors, mostly monochrome or CGA (no VGA as far as I ] could tell) ] ] A couple of cases of various PC software from the early 90's ] (stuff like RBASE, etc.) ] ] 3 or 4 large _HEAVY_ units that on brief inspection strike me as ] UPS (or line conditioner) units. No manufacturers markings were ] obvious (but I wasn't going to try to turn one over. My back is ] worth more to me than any UPS.) ] ] Piles of office telephones, Old modems, Various unidentifiable ] electronic assemblies of dubious origin, Boxes and boxes of cables, ] wire, etc. Cheers, Bill. PS. I've been _way_ behind on answering e-mail lately, so remind me in your reply that this is time-sensitive, and that machines will get crushed if I nap. :-/

26 years, 2 months

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Electrolytic capacitors and other picture postcards.

by allisonp＠world.std.com

<started to get flakey and now won't come up at all. Is my <understanding of ecaps correct? That is, as long as the <capacitance is correct, the voltage is greater or equal to <the required load and it is installed "right way around" <it should be OK? There is so much logic on this board, a They should not exceed 3x the wrking voltage plus any spikes that may occur. Electrolytic caps run at .25 or less the rated working voltage will not form and the actual capacitance will diminish. The later does take a bit of time usually. Likely the shorted caps are of the "tantalytic" tantalum electrolytic variety and they are know for that behavour. In any case the newly installed caps should have the following: -Short leads. -Working voltage of not more than 15-20V for a 5V rail, 50V for a 12-16V rail. -of course the replacement should be known good. The flakeyness is likely due to some other factor that may be due to the power cycling. I'd check the PS for a tired cap (a big one) or maybe a fried rectifier. It's conceiveable the output voltage is at the lower limit and causing flakies. <lot of it 8Txx, I hope I haven't blown a chip. It would <take me a month to find it and who knows if I could get a <replacement. Most of them are common enough and have TTL 74xx replacements that should work just fine. Allison

26 years, 2 months

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JVC GD-H4220US multi-sync monitor help needed

by pete＠dunnington.u-net.com

On Feb 7, 13:59, Ethan Dicks wrote: > Can anyone point me to a chart that has the older 9-pin RGB standard? I can > verify my adapter, then. Also, I'm not sure what kind of sync a CG6 generates. I'd have thought the Amiga adapter would work, if anything would, providing it's for an analogue monitor. Here's the pinout from my Acorn Archimedes, which uses a pretty standard multisync pinout: Type: DE9 Pin Function ---------------- 1 red 2 green 3 blue 4 composite sync 5 optional vertical sync 6 red ground 7 green ground 8 blue ground 9 sync ground and for comparison, CGA (which is TTL, not analogue): Type: DE9 Pin Function ---------------- 1 GND 2 Reserved (no connection) 3 red 4 green 5 blue 6 intensity 7 Reserved (no connection) 8 horizontal sync 9 vertical sync -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 2 months

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[CC] Wanted: Macintosh speech program called "Smooth Talker"

by mtapley＠swri.edu

David Vohs wrote: >I am looking for a driver for aforementioned Macintosh for an Apple Color >Stylewriter 2400. I don't want that printer to be reduced to dust magnet >status! http://asu.info.apple.com/swupdates.nsf/artnum/n10265 Don't know what system software it requires, but considering it's dated 1/97 it should be OK with 7.0.1 or 7.1, both of which run fine on my Mac Plus. - Mark

26 years, 2 months

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How to switch to digest mode . . .

by Historical＠aol.com

Hello everyone, sorry to ask through the list, but could someone please direct me in this? I used to be in digest mode. Thanks very much. Best, David Greelish Classic Computing Press www.classiccomputing.com

26 years, 2 months

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JVC GD-H4220US multi-sync monitor help needed

by ethan_dicks＠yahoo.com

I was just gifted with a GD-H4220US monitor that isn't behaving as expected. My best Web research indicates that it is a 19" analog/digital RGB monitor (dual 9-pin connectors and a mode switch) with scan rates of 15-37Khz and 45-87 Hz. I have attached this device to an Amiga 3000, my 486 LRP box and a SPARC2 w/single-width CG6 (via the standard 1395 13W3 adapter). In no case does this monitor give me a locked, stable display. The CG6 does the best, but the top dozen lines do not align, giving a "torn" appearance. The Amiga 3000 (15.75Khz and 31Khz, both) produce at best, two copies of the video, one on the top half of the screen, one on the bottom half. The externally accessible controls are a bank of 4 pots with height, v alignment, width and h alignment icons, labelled A through D; an overscan enable switch; a "cancel preset" switch and the usual bright and contrast controls on the front. I am using two different adapters to convert the monitor's 9-pin RGB to the more common 15-pin high-density connector used today for VGA. One adapter is a short cable, source unknown, the other adapter came with my Amiga 3000. Both adapters produce the same results. I have color, I have video data. I appear to be lacking in the sync department. The only other specs I found on the H4220US is that is is H-V, +ve sync. What I'm not sure about is how common positive sync is these days (it may be the standard for all I know; I've seen negative sync stuff in the past) and whether or not my adapters are properly propogating the sync signals. There is, of course, the possibility that the monitor is defective, but I suspect wiring, first. Can anyone point me to a chart that has the older 9-pin RGB standard? I can verify my adapter, then. Also, I'm not sure what kind of sync a CG6 generates. Can someone shed some light there, too? It's a really awesome monitor, especially for the price. Even with the plastic cover off, it generates no audible noise, unlike every other monitor in the room. One drawback: 2.3A listed draw (4A fuse). That's a lotta watts to keep powered on. I have the covers off at the moment and can find no obvious place to tweak the sync circuit. The manufacturing date is 1989 and it does not appear to be microprocessor controlled. Nothing appears obviously smoked or disconnected. I do not have any documentation to go with this display. Thanks in advance, -ethan ===== Infinet has been sold. The domain is going away in February. Please send all replies to erd(a)iname.com __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

26 years, 2 months

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JVC GD-H4220US multi-sync monitor help needed

by ethan_dicks＠yahoo.com

--- Pete Turnbull <pete(a)dunnington.u-net.com> wrote: > On Feb 7, 13:59, Ethan Dicks wrote: > > > Can anyone point me to a chart that has the older 9-pin RGB standard? > Here's the pinout from my Acorn Archimedes, > which uses a pretty standard multisync pinout: > > Type: DE9 > > Pin Function > ---------------- > 1 red > 2 green > 3 blue > 4 composite sync > 5 optional vertical sync > 6 red ground > 7 green ground > 8 blue ground > 9 sync ground This is _very_ close to what I eventually found at pinouts.com... NEC 9-pin Multisync: http://www.pin-outs.com/datasheet_58.htm IBM 15-pin VGA: http://www.pin-outs.com/datasheet_15c.html The difference is that on the NEC 9-pin, 4 and 5 are H. Sync and V. Sync. >From this information, my adapters are a) identical and b) correct. They do connect pin 4 on the 9-pin side to pin 13 and pin 5 to pin 14, as one might expect. The analog wires and associated grounds are as expected. I guess I'm down to either inverted sync or a defective monitor. Thanks for the nudge in the right direction. -ethan ===== Infinet has been sold. The domain is going away in February. Please send all replies to erd(a)iname.com __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

26 years, 2 months

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JVC GD-H4220US multi-sync monitor help needed

by ethan_dicks＠yahoo.com

--- Pete Turnbull <pete(a)dunnington.u-net.com> wrote: > On Feb 7, 13:59, Ethan Dicks wrote: > > > Can anyone point me to a chart that has the older 9-pin RGB standard? > > I'd have thought the Amiga adapter would work, if anything would, providing > it's for an analogue monitor. It is. I've used it on an ancient IBM "Professional Graphics Adapter" monitor - same case as the original IBM Mono monitor from the 5-slot PC days, but 31.5Khz, analog, and color. I would have thought it would work, too, but something's odd about it. Perhaps it's sync polarity. > Here's the pinout from my Acorn Archimedes, > which uses a pretty standard multisync pinout: Thanks. I'll check my adapter. -ethan ===== Infinet has been sold. The domain is going away in February. Please send all replies to erd(a)iname.com __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

26 years, 2 months

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FS: Mainframe and minicomputer manuals and control panels, and a complete storage technology collection.

by kstumpf＠unusual.on.ca

If you need or would like to buy these types of items, please send to me, in a private inquiry, a description of what you are looking for. I'll look for those item(s) and send a reply. Here is a slightly more detailed list: Mainframe manuals - all and any vendors - mostly theory of operation, functional specifications-type of manuals DEC maintenance manuals - just a few DEC handbooks - just a few Brochures - mainframe and minicomputers all in mint condition Pocket reference cards - mostly IBM 360 Tabulator manuals - Friden and IBM Tabulator plug board (just a small one) Control panels - mainframe and minicomputers Control consoles - IBM 705 and UNIVAC 1108 Punch cards - boxes (2 000 cards per box) of'em Collection of storage mediums - paper and magnetic including sonic delay line from IBM 2260 controller and core (would like to sell the collection complete, but will do what I must do) Auerbach library of Computer Technology Reports from 1962 to 1989 - hundreds of manuals and reports Books - mostly introduction to data processing or computers-type books Hope you find something you've been looking for. Yours in good faith Kevin Stumpf - The Nostalgic Technophile www.unusual.on.ca - 519.744.2900 EST/EDT (GMT - 5) Author & Publisher of The Guide to Collecting Computers and Computer Collectibles: History, Practice, and Technique

26 years, 2 months

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The pure *hell* of restoring a PDP-8/S desktop.

by dylanb＠sympatico.ca

-----Original Message----- From: Dwight Elvey <elvey(a)hal.com> To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org> Date: Monday, February 07, 2000 10:29 PM Subject: Re[2]: The pure *hell* of restoring a PDP-8/S desktop. >Edward Taussig <taussig(a)arpanet.com> wrote: >> Hi. Stabilant 22 was touted highly by Jerry Pournelle in Byte magazine >> as a contact enhancer, it might help after a good de-gunking. >> http://www.stabilant.com/ >> >> http://www.byte.com/art/9705/sec13/art1.htm >> "Stabilant 22, the miracle all-purpose contact enhancer. It not only makes >> for better electrical contacts -- a major use of Stabilant 22 is to get all >> the electrical noise out of hi-fi systems -- but also lubricates connector >> insertions. If you don't use Stabilant 22, I bet you wish you did." >> > >Hi > Why use someone's resold product when you can just >buy some silicone grease like DC4 and it works fine. >DC4 will last longer because it contain a binder. >As for degreasing, I would suspect that something like >brake clean would be better on electronics. Gunk engine >cleaner has corrosives and is hygroscopic. I don't think >I want that in my machine. It would surely cause >long term problems. I have been using engine gunk in minis for many years and have never had any come back. I am dealing with dirt/crud so thick that you couldn't get it off with just scrubbing. After the engine gunk I vacuum out the backplane, then use contact cleaner. I have never had a problem or a bad contact after that. This should only be used in minis where regulart contact cleaner fails. I have rarely had to use it because most minis come out of labs and are very clean. This mini has been sitting in a warehouse, unprotected for at least 25 years. The dirt was so thick on the negibus cables that I had to soak them in a tub for 4 hours and scrap the dirt off in layers. Looks like a millions $$ now but was disgusting to even handle before. Amazing how much dust and garbage something can accumulate over 20+ years. (it's been running 10 hours now without problems :-) ) john PDP-8 and other rare mini computers http://www.pdp8.com >IMHO >Dwight > >

26 years, 2 months

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Commodore PET Anatomy Pictures

by foxnhare＠jps.net

Just Added to my ever-growing Commodore Pages: Anatomy of the PET http://www.jps.net/foxnhare/pet/anatomy.html This is a collection of photos I took a bunch of months back displaying my PETs (and Educator 64) their case designs, keyboards, circuit boards, etc. It gives a good overview of the American Line of the various Commodore PET/CBMs. Such interesting things to see also in the Anatomy are: * A picture of the 'drilled ram area' that commodore had done to keep schools from expanding their PETs bought at a discount. * A pictures of the Early SuperPET board set and a close up of the two-switch version. * A picture of the three earliest designs of the C2N datasette * In the pictures you will see an original PET RAM Expansion, Graphics Expansion and a RAM/ROM Emulator. -- 01000011 01001111 01001101 01001101 01001111 01000100 01001111 01010010 01000101 Larry Anderson - Sysop of Silicon Realms BBS (209) 754-1363 300-14.4 bps Commodore 8-bit page at: http://www.jps.net/foxnhare/commodore.html 01000011 01001111 01001101 01010000 01010101 01010100 01000101 01010010 01010011

26 years, 2 months

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Batch OCR'ing from GIF's/TIFF's/bitmaps?

by ethan_dicks＠yahoo.com

--- "Zane H. Healy" <healyzh(a)aracnet.com> wrote: > I've got a question though, how was the stuff gotten into the computer in > the first place? Not feeling very motivated this morning so I just ported > the following to VMS BASIC: > 10-190 BATTLESHIP, Version: 2, January 1974 > http://pdp-10.trailing-edge.com/www/lib10/0276/index.html I just visited this link and was wondering what the crud on the last line of BT.BAS.1 was. Otherwise, good job. I'm sure there's a bunch of us whose early DEC experience was in the form of BASIC games, whether RSTS or OS/8 or whatever, and it all brings back the memories. -ethan ===== Infinet has been sold. The domain is going away in February. Please send all replies to erd(a)iname.com __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

26 years, 2 months

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[CC] Wanted: Macintosh speech program called "Smooth Talker"

by netsurfer_x1＠hotmail.com

I am looking for a copy of the old Macintosh speech synthesizer program called "Smooth Talker" from First Byte. I had this program on a floppy that my electronics teacher gave to me last year, but the floppy has since worn out & I have been searching *everywhere* for a copy, but to no avail. If you have a copy, *do not* send me a disk image, as my Mac (original Mac upgraded to Mac Plus specs.) does not recognize them at all. I must ask, however, that it come on an 800K floppy, 400K is not enough space! I am looking for a driver for aforementioned Macintosh for an Apple Color Stylewriter 2400. I don't want that printer to be reduced to dust magnet status! ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

26 years, 2 months

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Good work Jay!

by cfandt＠netsync.net

Hi Jay, Thanks much for your hosting of the classiccmp list! Thanks also for enduring the discussions regarding the "new" vs. "old" methods and HTML blocking, etc.! Some interesting bits of info came out of the many postings. Regards, Chris -- -- Christian Fandt, Electronic/Electrical Historian Jamestown, NY USA cfandt(a)netsync.net Member of Antique Wireless Association URL: http://www.antiquewireless.org/

26 years, 2 months

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No I'm not going to retype the subject

by wilson＠dbit.dbit.com

>From: allisonp(a)world.std.com >Another pet peeve, posts/replies in html, I don't read them and dump them >sumarily as A) they are often spam, B)the are a pain to handle via said >slow telnet and pine. I have the same attitude, WHY do people think we would even want to see a fancy schmancy version of what they typed as simple ASCII text, especially when many of us read this list on simple ASCII terminals anyway so we can't see any of the colors or misaligned columns. It's especially annoying when a message contains the same text twice, once as text and once as HTML, so at least half of the message is useless to *everyone*. I would *love* it if list servers could be set up to filter this crap out, or at the very least run the HTML text through Lynx or something and translate it back to usable 80-column ASCII. FWIW I'm not crazy about the new header format, when I replied to this msg with "R" (I'm using Berkeley Mail) it would have gone to Allison only, and when I changed to "r", the mailing list was only there as a Cc:, if I had edited out the other recipients there would have been *no* primary recipient, only a Cc:. And that's certainly not what we want! This problem comes up on every mailing list, maybe it would make sense to define an X-Foo: header that gives the mailing list address and hack the popular mailers to have a "reply to mailing list" command? Or has this already been done and I'm just oblivious as usual? Of course this wouldn't help Windows users running canned mailers with no source code available, but what can I say, shame on you!!! :-) John Wilson D Bit

26 years, 2 months

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Batch OCR'ing from GIF's/TIFF's/bitmaps?

by CLASSICCMP＠trailing-edge.com

Folks on this list have expressed strong opinions in the past on the subject of how to best OCR old important documents. Recent donations to the DECUS archives here have resulted in several important abstract books that I want to link electronically (i.e. by HTTP) to the files already rescued from magnetic or punched paper media. (See, for example, http://pdp-10.trailing-edge.com/www/lib10/index.html for the TOPS-10 abstracts linked to the files from DECUS library tapes.) I've spent the past weekend playing with scanners and OCR on PC-clones running various Microsoft OS's. And, of course, I'm extremely unhappy with the point-and-drool misery of doing all of this - there's no reason I should have to click with the mouse for every single page I need converted. So the question: does anyone have recommendations (preferably for freeware, though I would be willing to spend a few hundred dollars for good tools, too) for software that will process already-scanned .GIF's/TIFF's/bitmaps through the OCR process unattended? Ideally there'd be a command line interface, something like ocr page*.gif > bigoutputfile.txt and ideally it would run under Linux as well, though I wouldn't complain too strongly if someone recommended a Windows solution. If it does run under Linux, it'd be *very* nice for batch processing if it didn't need X11 and mouse-point-and-drool interfacing. Tim. (shoppa(a)trailing-edge.com)

26 years, 2 months

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DEC stuff for trade

by mmcfadden＠cmh.edu

I was at the local not-for-profit computer surplus and picked up the following DEC stuff 1. 2 TK25 tape drives in desktop cases 2. RD53 labeled disk drive although the disk inside the MicroVAX 2000 style case says RD52 3. tk50Z tape drive inside MicroVAX 2000 case 4. MicroVAX 2000 disk case 5. vax3100 style low profile expansion case 6. micro PDP 11/73+ in floor stand, the pdp 11/73+ boards are spoken for, probably running RSX-11M because of the number of terminal connections on the back of the machine. Anyone want the disk and case ? 7. micro pdp 11/23+ in floor stand, runs RSX-11M, boots and 8. 3 VT320's with keyboards Anyone interested, you pay minimal amount plus shipping? 1. I also picked up a AT&T Unix PC that boots up but is missing the keyboard, anybody know about compatible keyboards? 2. a HP 9862A pen plotter for desktop calculator, dust cover, an manual, but no cable 3. TI system 1100 that has 2 MB memory, dc300 tape, 5 1/4 floppy, and full height 5 1/4 internal disk drive I have my eyes on TK86 and TK867, both in deskside floor stands, before they go to China, are they currently usable? I also saw from afar some type of modular terminal connectors, I could read writing that says 90+ on them, they have a row of rj45 jacks on them and look like there are 4 or 5 mounted on plastic panel. Any idea what they are? Mike mmcfadden(a)cmh.edu

26 years, 2 months

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SCSI floptical drive

by mrbill＠mrbill.net

I picked up an external SCSI 21mb floptical drive (by PLI) this weekend; anybody have a use for it, or know where I can get media? Bill -- +------------------------+----------------------+-----------------------+ | Bill Bradford | mrbill(a)pdp11.org | mrbill(a)mrbill.net | | http://www.sunhelp.org | http://www.pdp11.org | http://www.mrbill.net | +------------------------+----------------------+-----------------------+

26 years, 2 months

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Token ring cards available

by rhblake＠bigfoot.com

Have 3 token ring cards to get rid of, nice ISA types that I assume are plug-n-play capable. They are as follows: 1) Intel token Express Pro 16/4 with manual. Has 9 pin din and RJ45 ports Jumperless card, 16 bit ISA 1) 3 Com 3C619B TokenLink III 16/4. Has status led's and 9 pin din and rj45 ports. Jumperless card, 16 bit ISA 1) 3Com 3C319 TokenLink Velocity ISA 16/4. Has status led's and 9 pin din and rj45 ports. Jumperless 16 bit ISA All drivers are available on Intel and 3Com's websites as well as manuals in PDF format. Cards are from working machines that got pulled off the network to become standalone units. They do not come with cables. Make me an offer or either cash or useful common PC items. Russ Blakeman Clarkson, KY

26 years, 2 months

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Free Macintosh Classic

by af-list＠wfi-inc.com

Hi all, I've got a buddy with a Classic and Stylewriter that he's about to dumpster...does anyone want to pay postage on one of these? Or you can arrange to pick it up (I'm in Southern California - Glendora). Cheers, Aaron

26 years, 2 months

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List server going down for maintenance

by west＠tseinc.com

Due to the hardware problems on the system that hosts the classiccmp list over the weekend, that machine will be going down for maintenance sometime today. The outtage is expected to last 2 hours at most. Regards, Jay West

26 years, 2 months

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From Usenet: pdp-8 Available

by mcquiggi＠sfu.ca

Hi Gang: Found on Usenet. Contact the poster directly. Kevin ----------------- I have an original model PDP-8 (core serial number 35) which I no longer have space for. It's the tabletop model with smoked plastic covers. I would like to give it to a museum that could take care of it and hopefully display it. If any of you know of a place that would be interested, please let me know. Thanks. Philip Lantz prl(a)mira.rain.com

26 years, 2 months

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Wanted: software & docs for Intel Series II & III MDS "blue boxes"

by eric＠brouhaha.com

I just acquired an Intel Series III MDS "blue box", to go along with several Series IIs that I've had for a while. Unfortunately, I don't have any software or documentation for either the Series II or Series III, not even the ISIS operating system. If anyone has spares or could make copies available, it would be most appreciated. For those not familiar with the Intel blue boxes: The Series II MDS is Multibus-based, and has either an IPB-80 or IPC-85 CPU card, based on the 8080 and 8085, respectively. There's also an IOC (Input/Output Card) that supports all of the integral I/O devices such as the monitor, keyboard, serial ports, and single-density floppy disk. An external double-density floppy disk system can be added; it uses two Multibus cards, a channel card and an interface card, and apparently uses M2FM code rather than IBM 3740-compatible MFM. The Series II normally runs the ISIS operating system, although I hear there was also a version of CP/M. A Series III MDS is mostly the same as a Series II with an IPC-85, but it adds a two-board RPC-86, which is an 8086-based "Resident Processor Card". A software package called "RUN" acts as the loader and ISIS operating system interface for the 8086.

26 years, 2 months

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Thanks Jay

by jeff.kaneko＠juno.com

I'll second that! Thanks Jay!! Jeff On Sun, 06 Feb 2000 20:34:20 -0800 Marvin <marvin(a)rain.org> writes: > > I just thought it appropriate to say a public thanks to Jay for all > the work > done on the list in bringing it back up. It is MUCH appreciated!!! ________________________________________________________________ YOU'RE PAYING TOO MUCH FOR THE INTERNET! Juno now offers FREE Internet Access! Try it today - there's no risk! For your FREE software, visit: http://dl.www.juno.com/get/tagj.

26 years, 2 months

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Thanks Jay

by edick＠idcomm.com

Yes, indeed! Hats off to Jay! Dick -----Original Message----- From: Marvin <marvin(a)rain.org> To: Classic Computers <classiccmp(a)classiccmp.org> Date: Sunday, February 06, 2000 9:54 PM Subject: Thanks Jay > >I just thought it appropriate to say a public thanks to Jay for all the work >done on the list in bringing it back up. It is MUCH appreciated!!!

26 years, 2 months

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Thanks Jay

by marvin＠rain.org

I just thought it appropriate to say a public thanks to Jay for all the work done on the list in bringing it back up. It is MUCH appreciated!!!

26 years, 2 months

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[ClassicCMP] Does RSX-11M 4.0 support MSCP drives?

by pete＠dunnington.u-net.com

Apologies if anyone already got this; I originally posted it during what seems to have been an outage, and I assume the original is lost... On Feb 5, 20:19, Chuck McManis wrote: > At 12:31 AM 2/6/00 +0000, ete(a)dunnington.u-net.com (Pete Turnbull) wrote: ^^^ ete? :-) > >On Feb 5, 14:47, Chuck McManis wrote: > > > Does anyone know if RSX-11M 4.0 supports MSCP drives? > > > >4.x certainly does, but I can't remember exactly which interfaces. > >The earliest MSCP support appeared in 3.x, I think. Nope, Pete was wrong again. It looks like MSCP support first appeared in 4.0. And I never did get my RQDX3 to work under RSX-11 (but I never had a version later than 4.2). > Well it may be moot if the tape is destroyed, however the plan was to > install it on an 11/23 using a Sigma RQDE11 (Webster licensed) board. I can > tell it to report back to RSX any set of disks I would like. The trick is > whether or not RSX will do the MSCP thing. (RT-11 won't for example until > 5.1 :-() I've never done an install from tape, except to recover a backup, and then what matters is what standalone BRU or DSC supports. In 4.2 at least, BRU and BRU64K.SYS (the standalone) do support MSCP, but the manual only lists RA80/RA60/RA81/RC25/RD51/RX50 disks (and no MSCP tapes at all). DSC only supports the RA80; standalone DSC has no MSCP support at all in 4.2. I'd expect 4.0 supports even less. The list above implies RQDX1 support and other things, but not RQDX3. That might be a problem, because I think there's a bug in the early DU: handler that prevents it working with RQDX3s. I certainly never got RSX-11 4.2 to work with any RQDX3, and the same bug might apply to a 3rd-party controller. Best way to find out is to try it. I reckon there's a reasonable chance it will work, especially if your disk controller works with RT-11 5.1. In RT-11, full MSCP support post-dates even 5.1. 5.1 works with RQDX1/2, but not RQDX3, for example; because whoever wrote the DU: handler ignored the MSCP documentation and made an unwarranted assumption about the contents of the SA register during initialisation. It took me ages to trace the problem and fix it :-). -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 2 months

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TF85 internals

by cmcmanis＠mcmanis.com

This apparently didn't make it out to the list. I was cleaning a TF85 (DSSI desktop model) and discovered that the drive talks to a bridgeboard that talks DSSI. The connector to the drive is the same number of pins as the TK70 drive. My question is whether or not one can drive the TK85 mechanism from a TQK70. I ask because I would like to put the drive inside a cabinet (BA213) and would rather not have the bridge board laying in there as well. --Chuck

26 years, 2 months

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No subject

by jeff.kaneko＠juno.com

Guys: Could any of you use a few RL02K-DC disk packs? I have three of them, shock-watches intact on two-- the third one doesn't have it. Jeff ________________________________________________________________ YOU'RE PAYING TOO MUCH FOR THE INTERNET! Juno now offers FREE Internet Access! Try it today - there's no risk! For your FREE software, visit: http://dl.www.juno.com/get/tagj.

26 years, 2 months

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Apple manuals available for download

by bsa3＠cornell.edu

Apple has released about thirteen years worth of product manuals in Acrobat format; the URL is <http://www.info.apple.com/manuals/manuals.taf>. Unfortunately, the covered time period starts with the IIci and Portable, which are topical by the ten-year rule, but we can always hope for more... -- Brad Ackerman N1MNB "You're a cyborg -- look it up." bsa3(a)cornell.edu Wandering Gweep -- Bradley Rhodes, to Josh Weaver PGP: 0x62D6B223 http://skaro.pair.com/ IAP lecture, 21 January 2000

26 years, 2 months

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HP System available in Oregon

by healyzh＠aracnet.com

Don't ask any specifics, I don't know them, and I've not seen the system. The Hillsboro "Wacky Willies" currenty has a largish HP system in back (you'd have to ask about it, I was in there yesterday and didn't even see it as they've blocked of the entire back half of the store). From what I was told it's at least one 19" rack, and bunch of terminals, lots of documentation, and I think tapes. I gather it might be something like a 735? Again, I know nothing about this system, someone I know that messes with DEC and Sun stuff spotted it and thought I might know someone that's interested. He said it's *over* a pickup worth of stuff! Zane | Zane H. Healy | UNIX Systems Adminstrator | | healyzh(a)aracnet.com (primary) | Linux Enthusiast | | healyzh(a)holonet.net (alternate) | Classic Computer Collector | +----------------------------------+----------------------------+ | Empire of the Petal Throne and Traveller Role Playing, | | and Zane's Computer Museum. | | http://www.aracnet.com/~healyzh/ |

26 years, 2 months

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Convex Mini-SuperComputer

by mew_jac＠swbell.net

If any of the serious Big Iron collectors are interested in a Convex there is one being decommissioned in Houston. This will be a large hall. If no one picks this thing up it will sit in the Houston weather for a year or so and be melted down. This is the second Convex I've run across in the last few months, surely not many more left. If your serious about moving a few thousand pounds of supercomputer Email me for the details. --

26 years, 2 months

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[ClassicCMP] Heath H89 diskette request

by KB9VU＠aol.com

I have a box of 10+ used hard sector floppies and a box of new hard sector disks for you. 8^) Mike, KB9VU CCA# 404 MARS AFA3BO Florissant, MO

26 years, 2 months

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AS400-C10

by thompson＠mail.athenet.net

The above item fell into my possession today. It appears to be circa 1990, contains three hard disks (or DASD, if you prefer), a 150mb QIC tape drive, and a twinax interface card. The IBM web site indicates this machine supports a whopping 20MB of RAM and 2GB of hard drive space. It still has an OS on the disks if I can remember which drive went in which bay in the machine (or if the id is in the drive rather than the backplane) The IBM site is not forthcoming on additional details on the machine.

26 years, 2 months

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[ClassicCMP] Does RSX-11M 4.0 support MSCP drives?

by pete＠dunnington.u-net.com

On Feb 6, 18:18, Allison J Parent wrote: > <In RT-11, full MSCP support post-dates even 5.1. 5.1 works with RQDX1/2, > > define full? Supports all the QBus controllers. OK, that's not very full :-) > <but not RQDX3, for example; because whoever wrote the DU: handler ignored > > Dont tell mine RT11 V5.01c system then as the RQDX3 runs just fine. To > the best of my knowlege RQDXn are interchangeable Maybe it depends on the firmware then, but I can assure you that the bug certainly exists, and lots of people other than me found it and suffered >from it. The particular bug is that the RQDXn (and other MSCP controllers) return some flags in the top 4 bits of the SA register during initialisation. On the RQDX1 and RQDX2, the rest of the register contains zeros, and the driver code depends on that -- IIRC, there are three places where it does a BNE on the result. The RQDX3 of the same vintage as 5.01, however, returns the interrupt vector in the bottom bits of SA, so the BNE doesn't work as desired. Actually, there's slightly more to it than that, but that's the basics. -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 2 months

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Ping

by Mzthompson＠aol.com

Upon the date 12:13 PM 2/6/00 -0800, Zane H. Healy said something like: >> The list still here? I have a hard time believing zero posts since last >> night. And then Christian Fandt graciously replied, astutely noting that: > Well, everybody was plumb wore out from all the list operation discussions :-) Boy, I'll say. I skim through the digest keying on the text 'Subject:'. I wore out one mouse trying to get through the likes of: : Subject: Re: [ClassicCMP] Re: ClassicCMP Re: [ClassicCmp] Tag requested in Subject: line : >> I am aware of no mail filters which only allow filtering on Subject:. > Seems to work very well now! May even be good enough to discuss the collection, restoration, and sharing of knowledge about classic computers. I have been on this list since mid-97, and Zane & Chris probably just as long, if not longer. We all know that we don't need '[ClassicCMP]' in the subject line since we have done without for this long. I for one will not debate it beyond this one posting, because it being or not being there makes no difference to me. I might suggest that if there are those wanting to debate it further and if Jay is willing, then set up another list classicmp-admin and discuss away. Meanwhile back at the ranch, I took the trash from my wife's shop out back to the dumpster. I noticed a mouse (two-button, not four-legged) in the dumpster. That led to a keyboard and on to a 386 PC. I know, I know, whoopee! Hey another spare mouse, keyboard, floppy drive never hurts. And there is a small chance that I will soon be hauling home a stack of DECstation 5000's and associated goodies. And one last soapbox point. I do not recall any postings yet, thanking Jay for all the efforts with regards to the list. Given all the flak, I would probably have used the ON/OFF switch by now. Why don't we flood this list one last time with some words of appreciation, and then you can tell all of us about your latest finds, etc. Mike Thompson

26 years, 2 months

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Fluke 9010 Micro-System Troubleshooter

by aek＠spies.com

"Has anyone got a manual for one of these?" Yes, I have extensive documentation at www.spies.com/arcade/schematics along with a lot of other information classiccmp folke will find usefu.

26 years, 2 months

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[CC] Tags are great

by mac＠Wireless.Com

Actually, folks, the software is -not- so stupid. What happened was that I put on my -personal- subject: line the string [ClassicCmp]. Then Jay added first ClassicCMP then [ClassicCmp]; these are in fact different. Notice: Re: [ClassicCMP] Re: ClassicCMP Re: [ClassicCmp] Tag requested in Subject If people had chosen to be observant, they would have noticed -no- other subject had multiple tags inserted, even when following-up. This is the way it should be. The linux-usb, bsd-usb, and irda lists all use tags, and are very helpful. Again, I don't see what the issue is for inserting [C] or [CC] at the beginning. As for this robbing people of 4 characters on the subject: line - gimme a break! (Or should I pop into flippant mode: what, -you- don't use 132-column screens to read your email! How primitive!) ;-) -Mike p.s. For the humor impaired, please note the ;-) on the previous paragraph. On Sat, 5 Feb 2000, Chuck McManis wrote: > I think Jay has turned them off, at least a couple of messages further down > seem to have them off, but the point is not how long they are, it is that > the software is too stupid to see "Re: [ClassicCMP]" and say "gee this > thing already has a tag on it, I'll leave it alone." Instead it adds > another one, so every reply adds 16 characters to the subject line. Tags > are evil. > > --Chuck > > At 06:05 PM 2/5/00 -0800, you wrote: > >I think just [C] or [CC] would be OK, too. > >-Mike

26 years, 2 months

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[ClassicCMP] Does RSX-11M 4.0 support MSCP drives?

by mbg＠world.std.com

>Dont tell mine RT11 V5.01c system then as the RQDX3 runs just fine. To >the best of my knowlege RQDXn are interchangeable (I have done that) with >one exception... the drive must be formatted for the RQDX3 as it's >apparently different from the 1/2. Full RQDX3 support was not in the *base* system until V5.2. Prior to that, it was a patch release for V5.1, which is why it works in V5.1c Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

26 years, 2 months

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[ClassicCMP] Does RSX-11M 4.0 support MSCP drives?

by mbg＠world.std.com

>In RT-11, full MSCP support post-dates even 5.1. 5.1 works with RQDX1/2, >but not RQDX3, for example; because whoever wrote the DU: handler ignored >the MSCP documentation and made an unwarranted assumption about the >contents of the SA register during initialisation. It took me ages to >trace the problem and fix it :-). MSCP support was added in V5.0 -- but there were some problems, not the least of which was the fact that it setup the interface such that if you didn't do any disk access for a minute, the disk would go off line. This was corrected in a patch for V5.0 and in the distributed V5.1, at which time it also worked with RQDX2... support for RQDX3 and other similar interfaces wasn't out until V5.2... Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

26 years, 2 months

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[CC] Tags are great

by ss＠allegro.com

Re: > This is the way it should be. The linux-usb, bsd-usb, and irda lists all > use tags, and are very helpful. But needless. A decent mail program can filter based on sender, so the message subject is redundant information. That should be "QED", but... > As for this robbing people of 4 characters on the subject: line - gimme a > break! It matters! Pegasus (3.12), even on a 21" monitor running 1600x1200 seems to refuse to display more than about 35 characters of subject heading in a folder (no matter how wide I resize that column of the window) ...why? I don't know! In short, when people complain...sometimes it's because they have a valid reason to complain. (Sometimes, of course, they don't :) sieler(a)allegro.com Stan Sieler sieler(a)allegro.com www.allegro.com/sieler/wanted/index.html www.allegro.com/sieler

26 years, 2 months

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HTML: was Re: Announcement: CHANGES TO THE LIST

by pete＠dunnington.u-net.com

On Feb 4, 17:01, Jay West wrote: > Now that the major issue appears to be resolved, I'm taking requests on > any other list behaviour that people don't like. I don't promise to > implement all of them, but I'll gladly take a look at it. My request-for-enhancement is: "do something" about HTML, or better still, "do something" about any "multipart/alternative" posting (which would include M$ richtext, with those application/ms-tnef attachments). Options I can think of: a) silently discard any such postings (probably not a good idea) b) bounce them back to the author, with an explanation of why bounced c) remove the non-text part d) combination of (b) and (c) e) accept, but warn the author (who may not realise (s)he's sent HTML) All of these would involve scanning the content to a greater or lesser extent. I've no idea how doable that would be with majordomo, whether the extra processing is acceptable to the server, or whether Jay has the time to do that. Just for information, some of these policies are implemented on our helpdesk at work, which automatically tracks, redirects, and archives user support enquiries. We implement (e) on the first "offence", and (b) thereafter, but since every incoming email is read by a human, we do it by paw and memory, and occasionally discretion (ie we tend to discard fewer mails from professors than students :-)). We also have a policy of discarding attachments (or indeed any message) by simple automated truncation at the 10-kilobyte mark (mainly to prevent filling mailboxes and archives with "why doesn't this 4Mb PostScript/JPEG/Word document print?"). I think the record idiocy was a 63MB Word document ("I can't send this document to my friend. Why?") -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 2 months

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[ClassicCMP] Does RSX-11M 4.0 support MSCP drives?

by allisonp＠world.std.com

<In RT-11, full MSCP support post-dates even 5.1. 5.1 works with RQDX1/2, define full? <but not RQDX3, for example; because whoever wrote the DU: handler ignored Dont tell mine RT11 V5.01c system then as the RQDX3 runs just fine. To the best of my knowlege RQDXn are interchangeable (I have done that) with one exception... the drive must be formatted for the RQDX3 as it's apparently different from the 1/2. Allison

26 years, 2 months

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Ping

by healyzh＠aracnet.com

26 years, 2 months

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[ClassicCMP] Re: HTML: was Re: Announcement: CHANGES TO THE LIST

by pete＠dunnington.u-net.com

Apologies if anyone already got this; I originally posted it during what seems to have been an outage, and I assume the original is lost... On Feb 5, 20:16, Chuck McManis wrote: > I'd send to Gary but, you know ... > > Go to the options panel and turn off "use microsoft viewer" and it wont > convert to HTML. It will still "flow" it however. So this message has been > "flowed" by Eudora, can anyone confirm or deny that it is in HTML or RTF? > (I see it as having two change bar type things on the left side. Neither, it's flat text; no HTML, no attachments. -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 2 months

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Another test

by cmcmanis＠mcmanis.com

Well this is my third message since last night and I haven't seen one yet. Then the Ping's came through this morning, perhaps this one will make it... --Chuck

26 years, 2 months

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[ClassicCMP] Heath H89 diskette request

by KB9VU＠aol.com

Oh, I forgot to tell you, there is a disk in the software pile called EMULATE. It will allow you to read and write several other computer disk write schemes (Kaypro, Osborne, Cromemco, Tandy, Magnolia, CDR, Z-37, Z-47, Etc.). The disks need to be the same media (Hard Sector or Soft Sector) but it works pretty slick. Mike

26 years, 2 months

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[ClassicCMP] Re: Disk size limits in VMS 5.4-1?

by allisonp＠world.std.com

<Certainly possible, the controller can "split" the drive into multiple <parts probably to get around this. Does anyone know what the largest drive <VMS 5.4 could use? Is that in the Software SPD somewhere? (This I have but <it is pretty opaque) <--Chuck It's not so much a limit on 5.4 as the specific hardware limits that were usually lower than VMS maxima. FOr example 3100s(early) cant have a boot device more than 1.07gb but data devices can be much larger. The problem was a artifact of early SCSI implmentations and not VMS limits. Since VMS allowed (even before V5) things like bound and shadow volumes to create terabyte sized disk fields I can see a limit for practical systems. Allison

26 years, 2 months

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[ClassicCMP] Re: ClassicCMP Re: [ClassicCmp] Tag requested in Subject: line

by cmcmanis＠mcmanis.com

I think Jay has turned them off, at least a couple of messages further down seem to have them off, but the point is not how long they are, it is that the software is too stupid to see "Re: [ClassicCMP]" and say "gee this thing already has a tag on it, I'll leave it alone." Instead it adds another one, so every reply adds 16 characters to the subject line. Tags are evil. --Chuck At 06:05 PM 2/5/00 -0800, you wrote: >I think just [C] or [CC] would be OK, too. >-Mike

26 years, 2 months

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[ClassicCMP] Does RSX-11M 4.0 support MSCP drives?

by pete＠dunnington.u-net.com

On Feb 5, 14:47, Chuck McManis wrote: > Does anyone know if RSX-11M 4.0 supports MSCP drives? 4.x certainly does, but I can't remember exactly which interfaces. I recall using an RQDX2 on miy 11/73, maybe RQDX3. The earliest MSCP support appeared in 3.x, I think. I assume you have a reason for asking? If I know what interface/drive you were thinking of, I might be able to look it up in the SYSGEN manual. -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 2 months

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[ClassicCMP] Re: HTML: was Re: Announcement: CHANGES TO THE LIST

by pete＠dunnington.u-net.com

On Feb 5, 9:09, emanuel stiebler wrote: > I like b) most. This sending of HTML, happens mostly to new members, (or to > "old" users, which got a browser "update" ;-)) so they can see immediatly > whats wrong, and we don't even see this email, so no reason for a new > discussion about it AGAIN. ;-) I've noticed on rare occasions, that regular contributors post an HTML or multipart message as a follow-up. I don't have one handy to check, but I suspect that's due to Netscape Messenger (and I think Outlook may do it too) having a setting that normally sends plain text, but HTML-ises a reply to an HTML message. I'm pretty sure the regulars who've let that happen have done so unintentionally. -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 2 months

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[ClassicCMP] Re: ClassicCMP Re: [ClassicCmp] Tag requested in Subject: line

by owad＠applefritter.com

>I have to come out as vehemently opposed to this. I'm on a couple of lists >that do this, and *all* it really achieves is reducing the number of >visibie/useful characters in the Subject: header, and increasing the >noise level. I agree; it is a bit of a nuisance. ClassicCmp gets so much traffic I'm sure most of us have it automatically sorted. At worst, how about just '[C]'? Tom Owad ------------------------------Applefritter------------------------------ Apple Prototypes, Clones, & Hacks - The obscure, unusual, & exceptional. ---------------------<http://www.applefritter.com/>---------------------

26 years, 2 months

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[ClassicCMP] Re: [ClassicCmp] Tag requested in Subject: line

by pete＠dunnington.u-net.com

On Feb 5, 11:18, Mike Cheponis wrote: > I'd like to see a small tag be prefixed to the Subject: line so that it's > easier to know that the email came from the Classic Computer list. > > I suggest the Majordomo "config" file include a line like this: > > subject_prefix = [ClassicCmp] > > or somesuch. That way, it's quite easy to sort on messages from this list > both automatically, and, equally important, manually. No!!! Please! Any sensible mailer can sort on, or at least display, one of the "Sender:" or "To:" field, or the envelope "From" (not the header "From:") instead of the envelope "To" line. All of these, as well as the "Reply-to:", refer to the mailing list address. Anyone who hasn't seen all the headers, see below for the headers as I received Mike's message, and you'll see what I mean. All the prefix does is make it messy, and waste space. -------------------received headers below here--------------------------- >From owner-classiccmp(a)classiccmp.org Sat Feb 5 23:59:44 2000 Received: from localhost by indy.dunnington.u-net.com via ESMTP (951211.SGI.8.6.12.PATCH1502/980207.PNT) for <pete@localhost> id XAA07839; Sat, 5 Feb 2000 23:59:44 GMT Envelope-to: pete(a)dunnington.u-net.com Delivery-date: Sat, 5 Feb 2000 19:52:39 +0000 Received: from mail.u-net.com by fetchmail-4.6.0 POP3 for <pete/localhost> (multi-drop); Sat, 05 Feb 2000 23:59:44 GMT Received: from [209.83.134.16] (helo=opal.tseinc.com) by mserv1b.u-net.net with esmtp (Exim 2.10 #63) id 12HBG2-0004Gp-00 for pete(a)dunnington.u-net.com; Sat, 5 Feb 2000 19:52:38 +0000 Received: (from majordom@localhost) by opal.tseinc.com (8.9.3/8.9.3) id NAA64868 for classiccmp-classiccmp-org-outgoing; Sat, 5 Feb 2000 13:18:56 -0600 (CST) (envelope-from owner-classiccmp(a)classiccmp.org) X-Authentication-Warning: opal.tseinc.com: majordom set sender to owner-classiccmp(a)classiccmp.org using -f Received: from NameServer.Culver.Net (mac(a)[206.79.230.38]) by opal.tseinc.com (8.9.3/8.9.3) with ESMTP id NAA64863 for <classiccmp(a)classiccmp.org>; Sat, 5 Feb 2000 13:18:54 -0600 (CST) (envelope-from mac(a)Wireless.Com) Received: from localhost (mac@localhost) by NameServer.Culver.Net (8.9.0/8.9.0) with ESMTP id LAA18471; Sat, 5 Feb 2000 11:18:55 -0800 (PST) Date: Sat, 5 Feb 2000 11:18:55 -0800 (PST) From: Mike Cheponis <mac(a)Wireless.Com> X-Sender: mac(a)NameServer.Culver.Net To: classiccmp(a)classiccmp.org Subject: [ClassicCmp] Tag requested in Subject: line In-Reply-To: <20000205114512.B17681(a)dbit.dbit.com> Message-ID: <Pine.BSI.4.05L.10002051112130.15055-100000(a)NameServer.Culver.Net> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-classiccmp(a)classiccmp.org Precedence: bulk Reply-To: classiccmp(a)classiccmp.org -------------------received headers above here--------------------------- -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 2 months

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[ClassicCMP] Macintosh Portable questions.

by owad＠applefritter.com

>How much would a 3Mb (or larger) memory expander card cost? All luck. They're so obscure there really is no set price. >How much would a car power adapter cost? You'd probably be best off just getting an AC to car converter. I have a "Curtis Power Maker 50" which I paid about $50 for, and it works fine. >Were there ever any cards released that used the ROM slot? >Were there ever any cards released that used the PDS slot? All I can think of is the modem and memory cards. >Where can I find a detailed pin-out diagram of the Portable's video out >socket & a PC's VGA video socket? This could be tough. An adapter is required to use an external monitor on the Mac Portable, and I've never heard of anybody actually owning one. Unless you can find a _lot_ more information, you'd probably have better luck finding a SCSI-based monitor. Tom ------------------------------Applefritter------------------------------ Apple Prototypes, Clones, & Hacks - The obscure, unusual, & exceptional. ---------------------<http://www.applefritter.com/>---------------------

26 years, 2 months

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[ClassicCMP] Heath H89 diskette request

by west＠tseinc.com

Another kind list user has just blessed me with four H89's and an H19, about 4 external 5.25 drives and one or two 8" drive boxes, along with a TON of manuals, software, etc. I was wondering if anyone can point me to a source for 5.25" floppy disk media for the drives that are internal to the H89's. I believe they are hard sector, perhaps 10 sector? Thanks in advance! Jay West

26 years, 2 months

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[ClassicCMP] Re: Disk size limits in VMS 5.4-1?

by allisonp＠world.std.com

<I believe VMS 5.4 is early enough that it doesn't like non-dec drives. I w <unable to get my seagate drive to show up at all until I upgraded to VMS 7 <whatever is on the hobbiest cdrom v2. The older versions' scsi driver was <finicky. There's a workaround, but I've forgotten what it is, and I'm sur <someone will post it. Was never a problem on my 3100, one had a quantum 120mb prodrive. It's close in size to the RZ23 but not exactly. Allison

26 years, 2 months

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[ClassicCMP] Does RSX-11M 4.0 support MSCP drives?

by cmcmanis＠mcmanis.com

Does anyone know if RSX-11M 4.0 supports MSCP drives? --Chuck

26 years, 2 months

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Disk size limits in VMS 5.4-1?

by cmcmanis＠mcmanis.com

I have a very perplexing problem. What I want to do is mount a Seagate ST410800N on a VMS 5.4-1 system. The hardware is a VAX 4000/300 with an Emulex UC-08-III controller half of which is in MSCP mode. (the other half is talking to the tape drive) There are two existing 1GB (Imprimis) drives on this system. First attempt: Put the drive into the SCSI chain, terminate it correctly, drives are targets 0, 1, and 2. The new drive is now target 0, the others are moved to 1 and 2. I reset the VAX and get into the Emulex firmware (rev 'M' (changed to 'R' later, see below)) and try to autoconfigure the drives. The two 1GB drives show up like they should, the 9GB drive shows up as a 500MB drive. Weird. Second attempt: Replace the firmware in the Emulex with version 'R'. Attempt to reconfigure, same problem as #1. Third attempt: Attempt to manually specify the geometry and notice that the Seagate is reporting it has 4925 cylinders but the prompt says the number has to be between 20 and 4095. I enter a number smaller than 4095 and say 'OK'. Now the drive shows up as having 14x10E6 blocks! Ok so now we're getting somewhere but I forgot to configure the other two. Fourth Attempt: Recompute "Fake" heads/sectors numbers so that by using 4094 cylinders I get close to the drives 17,845,431 blocks. Configure the two 1GB drives with all the defaults. Seagate drive shows up as a 1/2 G drive again. On a whim I subtract the number of blocks shown from what it should be, the result is in the 16x10E6 range, aha! I say. Fifth Attempt: Recompute cylinder/sector/head numbers so that the total will be less than 2^24-1 blocks. This works and I end up with a controller that thinks the drive is about 8GB in size (I could live with this for now...). So we go all the way up to VMS. In VMS I type 'INIT DUA0: TEST' and it fails with "%INIT-F-CLUSTER unsuitable cluster factor", I drill down through the help files but there doesn't seem to be a comment on this. It talks about VAX clusters and CLUSTER_SIZE which I tried setting to higher numbers (like 10 or 16). But nothing has worked so far. My questions then are: 1) Is there a way to get the Emulex controller to recognize more that 2^24 blocks on a SCSI drive? 2) Does VMS have a volume size limit in 5.4-1 that I need to know about? 3) If I "split" the volume on the Emulex into two logical drives, can the sum of the logical drive sizes be greater than 8GB? Curious minds want to know! --Chuck (Who is enjoying VMS for the time being ... ;-))

26 years, 2 months

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[ClassicCMP] Macintosh Portable questions.

by netsurfer_x1＠hotmail.com

Here are a few questions I have about the Macintosh Portable How much would a 3Mb (or larger) memory expander card cost? How much would a car power adapter cost? Were there ever any cards released that used the ROM slot? Were there ever any cards released that used the PDS slot? Where can I find a detailed pin-out diagram of the Portable's video out socket & a PC's VGA video socket? (The info in the manual is too vague, I require more info so I can at least try to rig-up a cable that can use a regular VGA monitor. That is all assuming that this is even possible in the first place) I know that Dynamic Engineering & Ebay have some of the things that I am looking for, but I am not paying *that* much for some of that stuff, they must think I'm an idiot or something. Also I really don't trust Ebay that much. ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

26 years, 2 months

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[ClassicCMP] Re: [ClassicCmp] Tag requested in Subject: line

by jfoust＠threedee.com

At 11:18 AM 2/5/00 -0800, you wrote: >I don't much care -exactly- what the subject_prefix ends up being, just some >tag that uniquely identifies the message as coming from classiccmp. [CCC] would be shorter. If your mail program is doing the filtering, classiccmp(a)classiccmp.org is sprinkled throughout the header - or is there a filter out there that can only look at subject lines? Or are we talking about filtering performmed by your eyes on your mailbox? - John

26 years, 2 months

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[ClassicCMP] Re: What's a WD2793A chip?

by edick＠idcomm.com

It sat as a mazzanine board on the 820 board, in place of the 1771 in order to enable the 820 to handle MFM format. regards, Dick -----Original Message----- From: Joe <rigdonj(a)intellistar.net> To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org> Date: Saturday, February 05, 2000 1:26 PM Subject: Re: What's a WD2793A chip? >Richard, > > Exactly what was add-on supposed to do for the Xerox 820? > > Joe > > >At 08:46 AM 2/5/00 -0700, Richard wrote: >>There may well have been one of these. I've got a one or two of the ones >a Denver company made for the Xerox 820 to insert a 1791/95 in place of the >1771. I even have the writeup somewhere, but no software patches. It just >seems that I never have both the mezzanine board and the doc at the same >time. >> >>Dick >> -----Original Message----- >> From: No Name <lsommo(a)hotmail.com> >> To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org> >> Date: Saturday, February 05, 2000 8:49 AM >> Subject: Re: What's a WD2793A chip? >> >> >> Wasn't there an add-on developed for the Xerox 820/ Big Board that >used the 2793? As I recall it was a a simpler (and less expensive) circuit >as compared to the other add-on being offered at the time. I had one and >lost it (as well as my 256K memory expansion board) during the course of my >moves. If anyone has the schematics for it I'd like to try and put another >one together. >> >> Lou >> >>Attachment Converted: "C:\ATTACH\ReWhat'1.htm" >> >

26 years, 2 months

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[ClassicCMP] PDP8/S, then GRI99, and later a British machine??

by kevinm＠xpuppy.freeserve.co.uk

Many years ago I worked on a minicomputer range manufactured in the UK. The series was the Molecular 18 sold by BCL Ltd. Having an interest in this machine, and in PDP8 machines, I have been looking for links between the two. (The two machines have quite a few similarities) In an interview, Saul Dinman (who designed the PDP8/S) talks about a later design called the GRI-909. Saul had left DEC at this stage. The company that manufactured the early Molecular 18 machines in the UK was Allied Business Computers, who also produced a machine called the GRI-99. This all may be coincidence and fanciful, but does any one have any information of the GRI range of machines? Kevin Murrell UK

26 years, 2 months

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Info needed: Eagle AVL S-100 computer

by Innfogra＠aol.com

Joe; I would ignore the AVL. Does anyone know if Eagle made a S100 computer? My bet is the computer is a generic S100 used to run multiple serial ports. However they could be custom controllers. AVL makes slide projector controllers for large slide shows. This sounds like a very early controller. What are the outputs on the AV cards? Could they conceivably drive Kodak Ektamatic or Carousel slide projectors? Slide projectors use 2, 5 or 7 wire/pin connectors. Some AVLs will control up to 12 slide projectors, usually in multiple of 3s (i.e., 3, 6, 9 or 12 projectors). Two of the wires control the power up and down on the light bulbs. If they did this directly there would have to be some serious power dissipation. AVL was an early adopter of computers. If I remember right Eagle made S100 computers before their crossover clones. This is my guess. Paxton

26 years, 2 months

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[ClassicCMP] DIGEST USERS/WANNABES PLEASE READ

by west＠tseinc.com

The digests appear to be working, but likely need some "tuning". It appears the digests are being sent only when a certain number of messages have stacked up. I would like to change it so that the digest is sent out at a certain time each day, once a day, regardless of the number of messages waiting in the digest. Does anyone have any ideas regarding how it should be timed? Also, quite a few people have emailed me asking what happened to the digests. Apparently the old software handled the digests as part of the main list. With majordomo, digests are actually a totally separate list. If you want digests instead of regular traffic, unsubscribe to the classiccmp list and then subscribe to classiccmp-digest which is the name of the digest list. Send to majordomo(a)classiccmp.org with a key of 'unsubscribe classiccmp' Then send another message to majordomo(a)classiccmp.org with a key of 'subscribe classiccmp-digest' Of course, there's no reason you can't subscribe to both :) Pleast let me know if there's any problems. Regards, Jay West

26 years, 2 months

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What's a WD2793A chip?

by edick＠idcomm.com

There may well have been one of these. I've got a one or two of the ones a Denver company made for the Xerox 820 to insert a 1791/95 in place of the 1771. I even have the writeup somewhere, but no software patches. It just seems that I never have both the mezzanine board and the doc at the same time. Dick -----Original Message----- From: No Name <lsommo(a)hotmail.com> To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org> Date: Saturday, February 05, 2000 8:49 AM Subject: Re: What's a WD2793A chip? Wasn't there an add-on developed for the Xerox 820/ Big Board that used the 2793? As I recall it was a a simpler (and less expensive) circuit as compared to the other add-on being offered at the time. I had one and lost it (as well as my 256K memory expansion board) during the course of my moves. If anyone has the schematics for it I'd like to try and put another one together. Lou

26 years, 2 months

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ClassicCMP test subject prefix IGNORE

by west＠tseinc.com

test subject prefix

26 years, 2 months

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Digital Prometrix Omnimap 111, DEC???

by mbg＠world.std.com

>It is the LSI-11 built into a VT100 thingy (a PDT-11?) The cards are from >left to right: LSI=11/03 processor, RQDXn disk controller, Memory (looks >like an M8044), serial port, and RX01 floppy controller. A cute system >and well worth the dollar that is currently bid :-) --Chuck Sounds more like a VT103 case... definitely worth it... Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

26 years, 2 months

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HTML in Email

by allisonp＠world.std.com

> method Allison is using now. <ducking and running> Well... the telnet link makes me think the SR on a pretty 11/70 as faster way to do it. The local at home stuff is rather odd but actually very efficient as it's edit/compose/reply is all done off line then you deliver (also fetches then). It has many things going for it, one it leaves nothing on the ISP, the connect time is minimal, all headers are visible, being slightly brain dead all worms/viri/trojans _can_ be sent through it safely and files TEXT or UUE greater than 50k are saved to disk and the first 1024 chars displayed. the interface is windows/3.1 so it isn't that bad. <> Sheesh. Plain text really sucks. Y'all prefer that someone type _like thi <> to indicate a piece of underlined text? or my habit *bolding* with <> asterisks? This message "encoded" with HTML is roughly 5% larger than it <> in plain text. Wow, now that's a waste of resources. < < I responded in kind (and also in Postscript, morse code, and uuencoded <DVI). ;) You forgot runoff and latex. Yes, html isn't that much larger but, then so is runoff(same thing really). I can read text from the Epson PX8 laptop... HTML is much to fractured looking for a 80x8 screen. Allison PS: orginal message as I initially see it in the view pane. the first 36 lines are just the header so those that never see it may have a clue. ----------------------------------------------------------------------------

26 years, 2 months

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Digital Prometrix Omnimap 111, DEC???

by allisonp＠world.std.com

<It is the LSI-11 built into a VT100 thingy (a PDT-11?) The cards are from <left to right: <LSI=11/03 processor, RQDXn disk controller, Memory (looks like an M8044), <serial port, and RX01 floppy controller. A cute system and well worth the <dollar that is currently bid :-) <--Chuck PDT-11 was a boardset without Qbus. More correctly it's a varient of a VT103, Vt100 with a Qbus backplane. CPU can be LSI-11 or 11/23 series. DISK and IO options can vary. Allison

26 years, 2 months

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PDP-11 sighting - "Sliders" pilot

by ethan_dicks＠yahoo.com

Hi, all, I happened to be watching the Sci Fi Channel tonight and caught the re- broadcast of the first "Sliders" episode. Quinn has a PDP-11 in his basement in San Francisco. It's blurry most of the time, but when he opens a worm hole for Wade and Prof. Arturo, the distortion effect brings the rack into visible clarity - it appears to be an RX01 or RX02 at the top of the rack, over a BA-11N box, CPU unknown. I'm not sure, but underneath the BA-11N, the narrow black vertical panels appear similar to the filler plates on a MINC-11 system, but that part of the rack wasn't shown as clearly. -ethan ===== Infinet has been sold. The domain is going away in February. Please send all replies to erd(a)iname.com __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

26 years, 2 months

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FW: SURPLUS MINI COMPUTER (Perkin Elmer)

by mcquiggi＠sfu.ca

Hi Gang: The new list seems to be working fine. Here's a message from a friend in the City of Vancouver. If you're interested, please contact Jim directly. There's a URL with more details. Kevin >Return-Path: <jim_lloyd(a)city.vancouver.bc.ca> >From: Jim Lloyd <jim_lloyd(a)city.vancouver.bc.ca> >To: "McQuiggin, Kevin" <kevin_mcquiggin(a)city.vancouver.bc.ca> >Subject: SURPLUS MINI COMPUTER >Date: Mon, 31 Jan 2000 09:47:09 -0800 > >Kevin, you had mentioned that you may have some intersted parties in the >attached machine. Here are some of the details. It is advertised on our web >site at www.city.vancouver.bc.ca/bid/SPS_00010.htm > >Thanks > > >"The City of Vancouver (Canada) has a Perkin Elmer mini computer for sale >that will be available for removal in approximately June 2000. This computer >will be in service until that date and has been used for operation of the >City+s Traffic Signal Management System. > > >Details: >Model 3210 CPU >2MB RAM >Model CDC50 - 50MB disc subsystem (two discs - one fixed, one removable) >Model 1175A tape subsystem (two drives - one 800 bpi, one 1600 bpi) 75inches >per second >75 CCU Winkomatic Modems with possible spares >10 Multiplexer cards (for modems) >Software not included" ========================================================== Sgt. Kevin McQuiggin, Vancouver Police Department E-Comm Project (604) 215-5095; Cell: (604) 868-0544 Email: mcquiggi(a)sfu.ca

26 years, 2 months

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What's a WD2793A chip?

by lsommo＠hotmail.com

Wasn't there an add-on developed for the Xerox 820/ Big Board that used the 2793? As I recall it was a a simpler (and less expensive) circuit as compared to the other add-on being offered at the time. I had one and lost it (as well as my 256K memory expansion board) during the course of my moves. If anyone has the schematics for it I'd like to try and put another one together. Lou

26 years, 2 months

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PDP-11 sighting - "Sliders" pilot

by CLASSICCMP＠trailing-edge.com

>I happened to be watching the Sci Fi Channel tonight and caught the re- >broadcast of the first "Sliders" episode. Quinn has a PDP-11 in his >basement in San Francisco. If I had to be able to interface to computers both 30 years in the past *and* 30 years in the future, I'd be sure to use my PDP-11 too :-). -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927

26 years, 2 months

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WTB: Multibus Cisco Ethernet cards

by ethan_dicks＠yahoo.com

If they aren't classic, they soon will be. I've got this ancient Cisco AGS+ router (68040-based) with Multibus and some kind of Cisco-proprietary slots inside. I have a quad V.35 card (useless to me because of the 26-pin high- density D-shell connectors and no cables). What I need is at least a dual Ethernet card. Whenever I ask my friends in networking, they always tell me the same story, "Oh, yeah. We used to have some of those, but we threw all that stuff out X months ago." So if all these folks have been throwing this sort of stuff out, I figure that *someone* on this list has seen the occasional item float by. Any and all leads are appreciated. I'm willing to pay in excess of 1.2 * shipping, but the sky is not the limit. Thanks, -ethan ===== Infinet has been sold. The domain is going away in February. Please send all replies to erd(a)iname.com __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

26 years, 2 months

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Digital Prometrix Omnimap 111, DEC???

by ethan_dicks＠yahoo.com

--- Chuck McManis <cmcmanis(a)mcmanis.com> wrote: > It is the LSI-11 built into a VT100 thingy (a PDT-11?) The cards are from > left to right: > LSI=11/03 processor, RQDXn disk controller, Memory (looks like an M8044), > serial port, and RX01 floppy controller. A cute system and well worth the > dollar that is currently bid :-) > --Chuck I see that you're the high bidder, or I'd probably bid on it myself (that, and I already have a VT103 and boxes of Qbus cards). What _I_ see there in the ad is an 11/23 CPU (KDF-11), some third party (floppy) controller (white handle - the RQDX3 has a 50-pin connector in the middle of a red handle; the RQDX1 and RQDX2 are quad-width), memory (perhaps an M8044, as you say), an IVB11 (IEEE-488) and a DJV11-J 4-port SIO card. Pretty standard stuff. Good luck on the box. I hope you get it. -ethan ===== Infinet has been sold. The domain is going away in February. Please send all replies to erd(a)iname.com __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

26 years, 2 months

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Digital Prometrix Omnimap 111, DEC???

by whdawson＠mlynk.com

Does anyone have any information on this item, a "Prometrix Omnimap 11" in what looks to be a VT-100 case? It's currently for sale on eBay, item 246642084. What was this used for? What OS or Application does it run? Is software available out there from anyone on this list? Was this equipment made entirely by DEC, or does it have modifications made by a reseller? What is this thing really worth? I know, lots of questions! Any answers? Bill whdawson(a)mlynk.com

26 years, 2 months

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WD1770 help needed

by Glenatacme＠aol.com

In a message dated 02/04/2000 3:34:32 PM Eastern Standard Time, ard(a)p850ug1.demon.co.uk writes: > The 1772 appears to be identical to the 1770 apart from the step rates it > uses. If your drives can take said higher rates, then the 1772 will work > in your controller. Thanks for the information, Tony. Upgrading the drives is not a problem since I have access to many types of drives. In fact, I recently had some trouble finding a drive *ancient* enough to work with the 1770 i/f. Glen 0/0

26 years, 2 months

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WD1770 help needed

by Glenatacme＠aol.com

In a message dated 02/04/2000 3:02:46 PM Eastern Standard Time, ethan_dicks(a)yahoo.com writes: > I am looking at a WDC-1772. It has 28 pins. Doesn't the 1770 have 40 pins? I am looking at a (dead) WD1770 and it's a 28 pin DIP. Glen 0/0

26 years, 2 months

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HTML in Email

by Glenatacme＠aol.com

In a message dated 02/03/2000 10:47:16 PM Eastern Standard Time, mcquiggi(a)sfu.ca writes: > I too vote against embedded HTML in email. Give me the content, the fancy > formatting is superfluous. I second the motion. Most usenet groups will savagely attack anyone posting binaries or html, and so it should be, here. If God had meant for us to read html, we would be born with browsers built-in. Glen 0/0

26 years, 2 months

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What's a WD2793A chip?

by edick＠idcomm.com

Be careful what you assume about this chip. As I wrote before, the external lowpass filter is different for different data rates, so if you want to use both 5-1/4" and 8" drives, (and the 3-1/2" ones that look like 8") then you need two lowpass filters. These can be hooked up very simply today as there are analog multiplexors with on the order of 1 ohm of on-resistance, though back then it was necessary to use relatively costly low-on-resistance D-mos switches. I very much prefer the digital approach, which, then, was the only real alternative. Dick -----Original Message----- From: Dwight Elvey <elvey(a)hal.com> To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org> Date: Friday, February 04, 2000 6:23 PM Subject: Re: What's a WD2793A chip? >Allison J Parent <allisonp(a)world.std.com> wrote: >> >> <In going through and sorting my piles of classic ICs, I ran across this Wes >> <Digital WD2793A chip. What is it? >> >> Take a 1793 and put some of the stuff needed to make it useful on the die, >> call it 2793. Basically it's a 1793 with data sep and precomp logic built >> on. > >Hi > Anyhow, if anyone wants the schematic for the iSBX card >I have with the 2793, I can trace it out for someone. >Just let me know. It has all of about 4 chips. >Dwight >

26 years, 2 months

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