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

by aek＠spies.com

"Is Fry's a good place to get scopes?" Fry's isn't a good place to buy anything. They would be the LAST place I'd buy any test gear from. I personally think you'll be better off with a late model used TEK scope (my fav is the 2465A right now) than anything you'd be able to buy new in your price range. You should be able to find a 2465 in decent shape for $1000-$1500

26 years, 7 months

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Fireproofing questions

by af-list＠is1.wfi-inc.com

Hi all, I just scored a 6-foot metal, 2-door cabinet that is marked as fireproof. I'd like to think it'd be a great place to store classic media, but it's not entirely heat-proof. To test it, I placed a hot clothes iron on the outer wall and measured the temperature/rate of climb on the inner wall, as well as the ambient temperature inside the cabinet. It was enough that, even with a comparatively small heat source (well, to a garage fire, anyway), anything within a few inches of the inner wall would have most definitely been damaged, and possibly items close to the center after a half-hour of exposure to the heat source. My question is this: is there something anyone could recommend that would make a good lining for the inner walls of the cabinet to insulate it from heat? Something that doesn't take up too much room (would kind of defeat the purpose of having a cabinet to store things in) and would protect the interior contents in case of a small fire. I don't think there's anything between the inner and outer walls besides air, though I'm not certain. Perhaps I could squirt some of that expanding foam in there or something? Cheers, Aaron

26 years, 7 months

2
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Oscilloscopes

by cmcmanis＠mcmanis.com

Having done this I'll weigh in in favor of the older Tek gear. When I had $1000 in my pocket "destined" for an oscilloscope I surveyed the market and nearly bough a Kiksui(sp?) scope. It was Korean made and had more bells and whistles than the Teks in the same price range. I ended up buying a used 465B that still had a valid calibration stamp. After about a month the horizontal amplifier went out on one of the channels which I had repaired for about $150. Since then it has worked flawlessly. Later, after my means had expanded somewhat I went back to the same dealer that was hot on the Kik scopes and asked him where they had gone, he simply said "away." They kept coming back (returns) and so he stopped selling them. So consider taking the 465B to a repair shop and getting a quote. If it is under $500 it would be a better investment than a "lesser" but newer scope. --Chuck

26 years, 7 months

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Oscilloscopes

by ethan_dicks＠yahoo.com

--- Jeffrey l Kaneko <jeff.kaneko(a)juno.com> wrote: > My sentiments exactly. > I should *never* have sold my 465B. It was in pristine condition, > and I sorely miss it today. I would seriously look for a *nice* > 465. They're old, but there were alot of them made, and they're > pretty reliable (well, I never had any trouble with mine, anyway). That ain't old... I've got a Tek 317 that I bought at auction about six or seven years ago... it has an A.E.C. inventory sticker from 1968. The sign at the auction cashier's window said, "All equipment is guaranteed to be non-radioactive". Some reassurance. :-) It didn't come with probes, but a friend of mine at the local university found me a package of vintage probes, unopened, in a drawer. Probably been there since they were new. -ethan ===== Infinet has been sold. The domain is going away in February. Please send all replies to erd(a)iname.com __________________________________________________ Do You Yahoo!? Thousands of Stores. Millions of Products. All in one place. Yahoo! Shopping.

26 years, 7 months

1
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Debugging ONMIBUS cards

by ethan_dicks＠yahoo.com

OK... take two on this... I've been working with a pile of hex and quad ONMIBUS cards and a PDP-8/e and PDP-8/a chassis. At one point I had a working machine, but since last weekend, something new has flaked out. I have one KK8E board set that passes basic front panel ops, runs an inchworm program but does not seem to be able to communicate out the serial port (M8560). I have a KK8A/DKC8AA/KM8A set that appears to boot floppies, but gives me funny results on the console. The KK8E processor board set does not seem to want to work in the -8/a box. The KK8A does not seem to work in the PDP-8/e box (the Load Address switch increments the MA register; it doesn't load it). The best I'm getting out of the -8/a right now is to waggle the floppies a bit, sort of boot, and drop me at an OS/8 dot prompt. This is even true of the ADVENTURE floppy that was booting last week. When I type commands at the prompt, none run, but I get odd error messages. One pattern is that if I type the command "ADVENT" at the prompt on the advent disk, I get back "ADFEND" - the letters drop a bit. If I attempt to run a command "UUUU", I get back "EEEE" as an error. Given that if the CPU or memory or RX8E were bad the system wouldn't boot, it suggests to me that there is a problem with the DKC8AA. My biggest problem is that I have schematics, but without a front panel on the PDP-8/a, I can't generate discreet operations to run the CPU through its paces and I can't toggle in simple programs. I have the prints for the DKC8AA. Is it feasible to build my own front panel? I don't even have one to copy; I'd be guessing the whole way. If I could use the KK8A in the -8/e box, I would use _its_ front panel, but that doesn't seem to work either. Does anyone have any helpful advice to get me past this chicken and the egg problem? I have prints; I have extender cards; I have a scope. I even have a logic analyzer, but it's not presently at the same place as the -8's. What I don't have is a combination of PDP-8 hardware that lends itself to reasonable testing. As for the PDP-8/e, does anyone have a simple TTY test routine? I could write one, but I'd love to see one that has stood the test of time. As I mentioned above, the inchworm runs fine. I'm presently using all quad cards except for an MS8-C 32K MOS memory card; I have core, but I don't know where the box of overhead connectors got left - I only know where three connectors are and the CPU needs two. I do happen to have a couple of Heathkit backplane connectors I can wire together, but I'm still short enough to do a proper job. For now, the MOS memory seems to work fine; it's the M865 and M8650 that I'm looking into. 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!? Thousands of Stores. Millions of Products. All in one place. Yahoo! Shopping.

26 years, 7 months

1
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Oscilloscopes

by allisonp＠world.std.com

<good at looking at the color burst of a video signal in any detail. Again, <find most folks design/troubleshoot in a variety of areas and that's why w <need scopes with all the toys. I don't see Tek making any more 20Mhz boxes Two things. 465 is not a 20mhz scope though Tek made many slower ones. A 20mhz scope is fast enough to look at the main clock of an 8/e/f/m. I use it for faster stuff knowing it will smear a bit after all it is 20mhz at 3db... I can be a snob and buy a heavy gun, had one. The problem is the FEW times I need it I can borrow a nice 7400, or anything else that suits me. The rest of the time it would sit if I had it. For the bulk of what I do the B&K2120 is plenty good enough. If anything I'd consider a digital o-scope not for fast events but the painfully slow where the storage mode would be real nice. When you consider most of the systems I'm like to pull the scope out for are PDP-8, or z80(4mhz) speeds a scope better than 40-50mhz is wasted anyway. The fast stuff I play with really wants the 16 or more traces of the logic analyser anyway. I'd say this, buy what you can afford, newer is better. Best is if you can try it before you buy it. Buying used, if it's too old, good or not maintenance can be painful. I saw the writing on the wall with the 465, great scope but age is a potential problem for maintenance. Something newer will also stay calibrated longer too. Also for the electronically inexperienced servicing something like that can be more than a beginers project plus a distraction from the real task. Oh, the money I didn't spend on a scope was spent on other toys like RF sources and the like. Allison

26 years, 7 months

1
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Oscilloscopes

by dylanb＠sympatico.ca

-----Original Message----- From: Tony Duell <ard(a)p850ug1.demon.co.uk> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Tuesday, November 23, 1999 9:06 PM Subject: Re: Oscilloscopes >> It's rare that I do. Used to have a 465B, didn't use it enough to warrent >> maintaining it or it's weight. While the book calls for a better scope, >> I know the 20mhz B&K would be more than enough to track 8F core problems > >Sure... But if you're buying a 'scope, it makes sense to get one that >will do all that you might need. So while you don't need a 50MHz 'scope >or whatever to sort out 8/f core memory, you might find it worth getting >one for other work. > >> as I used it to set the slice time. Then again, I know how to get the most >> out of a scope too. > >Oh sure... > >There are some people here (you're certainly one, I like to think I'm >another) who (most of the time, at least :-)) understand what we're >trying to look at and understand just what our test gear will do when >given a strange signal. We know what our '20MHz' scope will do with a >30MHz signal. And we know how to push the instruments a bit. > >You don't _need_ expensive test equipment. I've done a lot of fault >tracing using a cheap analogue multimeter and a Radio Shack logic probe. >And with those 2 instruments I managed to extract enough clues to the >fault to replace the fault component first time (most of the time). > >However, I am also sure that there are people here who could use some >more clues as to the fault, who can't interpret every last piece of >information that they can get from simple instruments. And those people >generally make use of rather more instruments, which perhaps aren't >strictly necessary... > >Don't get me wrong -- there are times when _I_ find a 'scope essential. >Perhaps if I was more clueful I'd not need one then either, but I do. But >I've also discovered that _very_ rarely do you need a new and expensive >piece of test gear to fix a classic computer. Most likely you can do it >with what you already have if you think about the problem. > I agree but I would not recommend someone dropping a couple hundred bucks to fix an old 20Mhz scope as I am sure they would not limit their use *exclusively* to vintage minis. A 20Mhz scope in RF/High speed logic troubleshooting/design is totally useless. A 20Mhz scope isn't even very good at looking at the color burst of a video signal in any detail. Again, I find most folks design/troubleshoot in a variety of areas and that's why we need scopes with all the toys. I don't see Tek making any more 20Mhz boxes. >I was discussing a related subject with a friend earlier this evening. We >came to the conclusion that experienced hackers (this was actually about >mechanical engineering, but it applies to electronics as well) can do a >lot of good work using 'scrap' components and a few tools/instruments. >But beginners probably should use new (and known-good) components and >have rather more instruments. Of course it's often the other way round -- >beginners don't have the money to spend on a hobby they may not continue >with, while experienced people have obtained a good collection of tools >and test gear over the years (and really know how to use it!). > >-tony >

26 years, 7 months

4
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Oscilloscopes

by healyzh＠aracnet.com

Well thanks to the PDP-8/m, I'm finally getting around to trying to figure out how to use my Tek 465B scope. Unfortunatly according to my Dad the scope needs some work, I figure he should know as he retired from Tek. With his help I did finally get some readings, not quite what I'm looking for, but I'm fighting several obsticales. No manual, an apparently flakey scope and you *don't* even want to know what I'm using for probes (hint, they looked kitbashed, and I've had to extend the connectors to be able to take readings). End result, I'm pondering just going out and buying a new scope (which I'll be the first person to say is really, really stupid given my electronics abilities). Looking at what the recommended replacement for my scope is, I see it's a TDS220, and more than I want to spend. The recommended replacement for the scope listed in the PDP-8/e/f/m maintenance manual is a TDS210, still more than I really want to spend, but getting closer. Does anyone have any recommendations for good new scopes that would probably only be used for working on DEC gear (but you never know). Ease of use, and small size a big plus. Ideally something under $1000, or even better $800. Is Fry's a good place to get scopes? They've probably got the best selection in the area that I'm aware of. 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, 7 months

7
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HP 5001 MicroProcessor Exerciser

by rigdonj＠intellistar.net

Does anyone have a manual for one of these or has anyone ever used one? Joe

26 years, 7 months

1
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Oscilloscopes

by allisonp＠world.std.com

<> You should be able to find a 2465 in decent shape for $1000-$1500 Youch! I do 98% of my work with a B&K 20mhz dual trace and a NLS MS15! Most of the time I don't need more than that to see if life exists and rough timing. I also have a Logic analyser if I need something faster. It's rare that I do. Used to have a 465B, didn't use it enough to warrent maintaining it or it's weight. While the book calls for a better scope, I know the 20mhz B&K would be more than enough to track 8F core problems as I used it to set the slice time. Then again, I know how to get the most out of a scope too. Allison

26 years, 7 months

3
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Own Your Own Internet Store

by sports111opp＠hotmail.com

An HTML attachment was scrubbed... URL: http://www.classiccmp.org/pipermail/cctalk/attachments/19991123/7bd61f37/at…

26 years, 7 months

4
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Test

by me＠mallison.fsbusiness.co.uk

test

26 years, 7 months

1
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MSVC

by mallison＠konnections.com

I don't remember a "Visual C" for DOS. There was Microsoft C which the best version was probably 5. There (might) have been a Visual C for Windows 3.1. I received a free copy of Visual C++ for Windows 3.1 with Visual C++ V4, or whatever. I see copies of those in the CD resale/software resellers around here. I have MS C, but I think the only one I have is for Xenix.... Of course, I could be totally wrong, I can't remember. -Mike -----Original Message----- From: Bill Farmer <wlfarmer(a)ancimail.prod.fedex.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Tuesday, November 23, 1999 5:40 PM Subject: MSVC >Do you know where I can purchase a copy of Microsoft Visual C. I do >not wnat C++, just plain old Visual C for compiling in DOS. > > >

26 years, 7 months

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Oscilloscopes

by edick＠idcomm.com

Too bad it's the 465 "B" version. I've got an extra service manual for the 'A' version, which was the last one TEK built before simplifying their triggering circuit. They did this because HP proved you don't have to be able to trigger all that well. I recently (2 years back) bought a fairly clean TEK 475A with the DM44 option and probes for the scope and the DMM for $500 by searching the newsgroups. I still have my 465 which I bought about 20 years ago from an instrument rental outfit. It needed a little service, and, when I took it to TEK, I learned that it was only three months old and still in warranty, so the tune-up was free. The fellow who declared his "fav" is the 2465 has forgotten the size of the difference in cost between a scope like the one I bought and that model. My 2467B was stolen in a burglary about five years ago, and, while I got my 2467 from a local aerospace contractor doing a selloff after a contract was prematurely terminated. The 2467 equipped as mine was would have cost about $15K leaving out the less common options, though there were fewer than half a dozen for sale throughout the country. I should have paid closer attention to the price changes and the ones which were sold while I was negotiating with my insurance carrier. By the time I got a check, the lowest-priced available 2467B was over $20k. For fiddling with a PDP-8 you don't need a 400MHz 4-channel instrument with GPIB, etc, with microchannel plate display amplification to help you observe metastability in sub-10ns logic, since there isn't any (sub 10ns logic, I mean). If you look on DEJANEWS, you can find several guys who routinely refurbish and resell instruments. They will send the instrument to you on approval, and all you're risking is the odd $50 for shipping. A lot depends on what you have sense to tell the guy you want, since that may remind him to check things out more thoroughly. I'd recommend you buy your probes from the guy who sells you the instrument. They're more important than you might think, and the guy who wants to sell his scope will be motivated to find you what you want. Be sure to insiste that they be complete, however, because missing parts are likely to remain so. Dick -----Original Message----- From: Dave McGuire <mcguire(a)neurotica.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Tuesday, November 23, 1999 4:27 PM Subject: Re: Oscilloscopes >On Tue, 23 Nov 1999, Dwight Elvey wrote: >> You can get manuals for these someplace. They are out there. > > For manuals try www.usimperio.com. I deal with these folks regularly >(they're local to me) and they're very well-stocked. Tek manuals aren't cheap, >though... > > -Dave McGuire

26 years, 7 months

1
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Oscilloscopes

by dylanb＠sympatico.ca

-----Original Message----- From: healyzh(a)aracnet.com <healyzh(a)aracnet.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Tuesday, November 23, 1999 8:40 PM Subject: Re: Oscilloscopes >john wrote: >> Watch used 210s.. Tektronix recalled a huge lot of them (I think almost all >> of them) last year as the connection to ground was breaking off inside the > >If I replace the scope I've got, I don't see me trying to cut corners again >by getting another used scope. If I do, it will be from a reputable dealer. > >> scope (Yikes!). Also, the 210 has a shitty display like my THS720A... it is >> LCD and rather fast changing waveforms can look like a band of black on the >> screen (very annoying).. The price is right and the storage is nice but the >> display is not anywhere near as nice as a CRT. > >I've got to admit I'm wondering about the quality of a LCD display. > I am quite sure you *won't* like it compared to a CRT... and a field of video on it looks like garbage. >> Best thing to do is go to your local Tek dealer and try out a TDS210 and a >> CRT model (maybe even a 694C ;-) ).. See which one your comfortable with >> and then buy used if you don't want to spend the bucks. > >Sound advice, I figure I'd like to be able to see what I'm getting before I >get it. However, a quick look at the Tek site has me suspecting I'm not >going to want to spring for any more than a TDS210. > Then buy a CRT scope from another manufacturer. Tek is costly... or... You could be patient, call the largest local liquidator around and get on his mailing list. I picked up two of my scopes through bankruptcy auctions and paid far less than what they were worth. Look for a local company going broke that *would* need a good digital CRT scope in operations(more than you think). You can get the list before the auction and scan for a TEK realtime. I have turned down *many* TDS400 series scopes for less than $600US at these auctions because what could I do with a forth scope???? Most bidders attend a food processing plant for food and machines.. not Tektronix scopes.. and you won't find your local surplus guy bidding against you if it is the only piece of electronic equipment they had. I take *leaves* from work at least twice a month for auctions. At auctions over the past three years I have found (just for interest): IBM 1401 - went for $500 (Interhauler Yahts - Niagara Falls Area) Basic MAI 4 - $800 (some guy thought he could use it in his company - hahahaha) NCR Xenix? Towers Actually I saw another 1401 sell at "Sun Beam Shoes" in Port Colbourne (near niagara falls) for scrap at their bankruptcy auction because they couldn't even get a minimum bid of $200. Too many PDPs to list.. not to mention an IBM1130 at the local school board auction a few years ago. >> I don't recommend throwing away a few hundred dollars on an old piece of >> junk... you just might get another PDP-8 to fix! ;-) > >I like that kind of reasoning :^) I'd still like to get something like an >-8/i one of these days, but the -8/m is better than nothing (and it's taken >a long time just to get it). > I am happy you agree. I could never justify blowing $500 on a piece of junk if I know I *really* need to spend a thousand bucks on something I can use for a long time. 8I ????????? Hmmmmmmmmmmmmmmm. email me! > Zane >

26 years, 7 months

1
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Splitting TIFFs (was Re: Yet more on -8/m Mem problems)

by pete＠dunnington.u-net.com

On Nov 23, 21:44, Tony Duell wrote: > > > > ard(a)p850ug1.demon.co.uk (Tony Duell) wrote: > > > My guess is that tifftopnm (which is what I normally use) is only going > > > to extract the first page as well. Anybody got a utility to pull the tiff > > > apart into individual pages? > > > > Look for tiffsplit, which I think comes with libtiff (so if you built > > Right... The version of the pnm tools I installed came with libtiff > (correctly configured :-)), but not with any other utilities... > > However, I now know what to look for when I need to split up multi-page > tiffs (which is hopefully not too often) -- thanks! I thought of tiffsplit too, but I tried it on a couple of the smaller tiffs >from highgate today -- and it choked. tiffsplit only recognises a limited set of tags, and those tiffs seem to have at least one it doesn't like :-( -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 7 months

1
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DEC field service (was Re: HP's not cool? (was Re: pdp-11/60 Semi-Rescue))

by pete＠dunnington.u-net.com

On Nov 22, 18:04, Bill Pechter wrote: > Boy the number of 4:55pm calls on Friday used to really %R$^& me off > including the one a printer at Roche medicalwhere the customer shimmed the > ribbon path with test tube lids and left scalpul blades in the LP25 when I > got sent out to work it. > > The printer was obviously having problems for at least a day or so > before they finished their medical test runs -- but they waited to call > until it was completely unreadable. Sounds like one I had to deal with when I worked for a third-party maintenance company. I was trained on Q-bus and mostly worked in the regional workshop, but I did a few fill-ins on other stuff. Anyway, one afternoon I was sent out to the head office of a well-known bank in Edinburgh, to deal with a printer (not on normal contract, but a fix-on-fail pay-per-fix deal). I was ushered into a room with four middle managers, one of whom was highly resentful that the Epson FX80 on his PC AT had stopped working, and even more resentful that someone was going to get in his way in order to fix it :-) The problem was simple -- it was so clogged with paper dust that the head couldn't move all the way to the margin. I don't just mean there was a lot of dust on the carriage and bars, the case was *full*. I politely suggested the owner might like to clean it (or have it cleaned) periodically, and got a stream of invective about how he'd complained it was making his printouts dusty, it was my problem not his, he was far too busy to ever do anything of the sort, and it was a maintenance company's job anyway. Well, I though of showing him the page in the manual about user maintenance, but it would obviously have been a lost cause... -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 7 months

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Oscilloscopes

by jeff.kaneko＠juno.com

My sentiments exactly. I should *never* have sold my 465B. It was in pristine condition, and I sorely miss it today. I would seriously look for a *nice* 465. They're old, but there were alot of them made, and they're pretty reliable (well, I never had any trouble with mine, anyway). On Tue, 23 Nov 1999 14:45:59 -0800 Al Kossow <aek(a)spies.com> writes: > "Is Fry's a good place to get scopes?" > > Fry's isn't a good place to buy anything. They would be the LAST > place I'd buy any test gear from. > > I personally think you'll be better off with a late model used > TEK scope (my fav is the 2465A right now) than anything you'd > be able to buy new in your price range. > > You should be able to find a 2465 in decent shape for $1000-$1500 ___________________________________________________________________ Get the Internet just the way you want it. Free software, free e-mail, and free Internet access for a month! Try Juno Web: http://dl.www.juno.com/dynoget/tagj.

26 years, 7 months

4
3
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Great Find Today

by jrkeys＠concentric.net

A co-worker came and placed a complete copy of Windows 1.0 on my desk today. Wow it has all the paperwork nothing was mailed in. The manuals are in great shape as is the 5 1/4 diskettes ( I will be backing them up to the zip drive or cd) and the box is in fair shape with small signs of wear. Also got 6 manuals today, one was a service manual for the PC40-III commodore.

26 years, 7 months

2
2
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Own Your Own Internet Store

by edick＠idcomm.com

I use a hotmail account for situations as you've described. Just the other day, I got a chilly little notice from them indicating that they were about to purge a few of my files because I had a lot of stuff there. I had, on that day, received 76 new emails, of which 72 were spam. 6 of those were spam with sender addresses within HOTMAIL. I figure they can't be doing much to discourage spamming if they go right ahead and forward what they obviously recognize as having counterfeited their own domain into the sender address. Hotmail has a destination, i.e. abuse(a)hotmail.com, to which you're encouraged to send your complaints, particularly in the form of uncommented forwarded spam, complete with headers. Now, I don't know that they DO anything, but you'll get this neat little reply from them, indicating that they do a bunch of stuff to discourage spamming via their facilities. They also tell you that some folks counterfeit their domain as a sender address, and how you can tell it's a counterfeit address, etc. What I think would help would be if the domain from which spam originated were blocked from sending email, particularly for the larger concerns whose income/existent is dependent on large volumes of mail, etc, THEY would take steps to prevent it. If it were simply made impossible to send the same message to more than one destination address, that would help, as would disallowing sending the same message twice. I'm not an expert, and I don't doubt that the spammers will find another way to do the same thing. What disturbs me is that they're chewing up bandwidth that we're all eventually going to have to pay for in one way or another, most probably by paying for internet bandwidth the way we pay for long distance phone service. Now, that would help get rid of those annoying little 800KB "greeting cards" of which those little old ladies like to send thousands a day, but the spammers would still chew up the bandwidth. Regulation is an ugly thing, and it's not likely that the sort of regulation that people in the US come up with will help anything. They're always trying to legislate good sense, particularly the folks living near the San Andreas fault, who are apparently the world leaders in this. It's not their domain alone, however. The type of regulation that will come about as a result is likely to be the sort of regulation that folks like Adrianna Huffington promote, i.e. don't let anybody put anything out on the internet just in case my little kid might stumble into something I don't want him/her to see. They are overreacting, aren't they? Gawd! I have never run into a nudie by accident, and, quite frankly, I can't even find decent ones when I want to! Nevertheless, it would be nice to watch the halftime show at the superbowl and see them take the 100 worst spammers and slowly dip them into a solder pot. <end of rant> Dick -----Original Message----- From: Christian Fandt <cfandt(a)netsync.net> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Tuesday, November 23, 1999 12:22 PM Subject: Re: Own Your Own Internet Store >Upon the date 12:29 PM 11/23/99 +0000, sports111opp(a)hotmail.com said >something like: > ><rudely intrusive HTML msg snipped> > >Could these guys have sent this as a vindictive attempt at getting back at >us for your good attempt at LARTting them Bruce? If so, *really* LART them >next time :-) But that Hotmail account helps to make them a bit invisible >I think. BTW, you asked u.wash to try to limit access to the list only to >those who are subscribers. I hope they don't take the simple route and >simply bar any Hotmail-sourced messages from getting through. Some >ClassicCmp subscribers could use Hotmail as a quick, simple email provider >-especially if they're traveling, etc. > >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, 7 months

2
1
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Oscilloscopes

by dylanb＠sympatico.ca

Couldn't agree more Al. I have and use a 2465 on most analog and 4 trace matters. I have a THS720A for "inside the rack" and I use my TDS654 for high speed glitch problems. I would highly recommend anyone buying a 2465 on EBay... Excellent scopes to 300Mhz and really inexpensive... much better than the 465. -----Original Message----- From: Al Kossow <aek(a)spies.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Tuesday, November 23, 1999 5:46 PM Subject: Re: Oscilloscopes >"Is Fry's a good place to get scopes?" > >Fry's isn't a good place to buy anything. They would be the LAST >place I'd buy any test gear from. > >I personally think you'll be better off with a late model used >TEK scope (my fav is the 2465A right now) than anything you'd >be able to buy new in your price range. > >You should be able to find a 2465 in decent shape for $1000-$1500 >

26 years, 7 months

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Splitting TIFFs (was Re: Yet more on -8/m Mem problems)

by fmc＠reanimators.org

ard(a)p850ug1.demon.co.uk (Tony Duell) wrote: > My guess is that tifftopnm (which is what I normally use) is only going > to extract the first page as well. Anybody got a utility to pull the tiff > apart into individual pages? Look for tiffsplit, which I think comes with libtiff (so if you built the PNM stuff with TIFF support, you may have it installed already). -Frank McConnell

26 years, 7 months

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List spammer traced

by kyrrin＠bluefeathertech.com

Our latest list spam has been traced. LARTs have been launched. I've also sent a query to CLASSICCMP's human contact asking if things can be configured to allow postings only from those who subscribe. It wouldn't stop a Really Determined spammer, but it would make them a lot easier to track down. We'll see what happens. -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- 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, 7 months

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Did the list change?

by jfoust＠foust.org

I resubscribed at a different domain that I own, so I'm back on the list and receiving messages. I'd like to figure out the problem with U-Wash not sending to threedee.com nonetheless. - John

26 years, 7 months

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E.U.N.U.C.H. (Cooling)

by rgarner＠Brocade.COM

Sipke de Wal, I passed your concern about Beryllium Oxide to someone here. His response: The only danger is as mentioned below, dust which does not happen by accident. It is necessary to seriously grind or file the hard material to create dust. As long as you do not try to machine it or file it or break it up there is not problem. So, assemblers should be warned not to mistreat it, breaking grinding or filing it. When I use it I also use thermal compound to make a good thermal connection. This greasy substance also provides a measure of added protection because if the BEO were accidentally scratched or broken any small particles would become mixed into this greasy compound and not become airborne. It has the properties of: 1. a dielectric constant of about 6 for low capacitance 2. a very low thermal resistance for cooling If there is great fear of using it alumina can be substituted: 1. dielectric constant of 10 2. low thermal resistance but not as good as BEO. Ron Miller > -----Original Message----- > From: Sipke de Wal [SMTP:sipke@wxs.nl] > Sent: Thursday, November 18, 1999 10:40 AM > To: Discussion re-collecting of classic computers > Subject: Re: E.U.N.U.C.H. (Cooling) > > Beware !!!!!!!!!!!!!!!!!!! > > Beryllium was mentioned here. Beryllium Oxide was used in the thermal > conduction stuff HF-transistors decades ago, but this ceramic stuff can > be quite lethal. If it breaks and you inhale a few microns of the dust > there off, lungcancer can almost be guarantied within a decade !!!! > > Stay away from BEO !!!!! > > Sipke de Wal > > > > Hans Franke wrote: > > > > > At -100 Celsius: Al, 241; Cu, 420, Ag, 432. Interestingly enough, at > these low > > > temperatures Beryllium is pretty good at 367. > >

26 years, 7 months

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Apple ][+ find and info/sw request...

by pete＠dunnington.u-net.com

On Nov 22, 8:19, Eric Smith wrote: > ard(a)p850ug1.demon.co.uk (Tony Duell) wrote: > > Incidentally, back when Apple ][s were current it was generally claimed > > in the UK that if you plugged anything but a colourcard into slot 7 you > > would do serious damage to the machine. Looking at the schematics I can't > > see a reason why this will do any damage, but I've never had the courage > > to try it. Anyone know anything about this? I remember being told that, and remember the sticker over Slot 7 (one of my Europluses still has the sticker) but I don't know if there was any cause for concern. I think the purpose of the sticker was simply to ensure people left Slot 7 free in case a colour card was added later. > Probably just an urban legend, like the ones about how all your memory > chips need to be from the same vendor, and how they must all be the > same speed, and how you shouldn't use 120 ns DRAMs in a computer designed > for 150 ns DRAMs, and similar BS. Probably. The only things different about Slot 7 are pins 19 and 35 -- which carry sync and color-ref signals from the motherboard to Slot 7, but are unconnected on the other slots. According to the circuit diagram, anyway. Unless some card used those pins for some non-standard purpose, it shouldn't matter. -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 7 months

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50-year-old Aussie CSIRAC computer being restored

by jfoust＠foust.org

Having just returned to the list, I'm not sure if this news made it here yet, but here's a few links to stories: <http://www.theage.com.au/news/19991122/A56120-1999Nov21.html> <http://www.it.fairfax.com.au/hardware/19991123/A57309-1999Nov22.html> <http://technology.news.com.au/news/4280542.htm> - John

26 years, 7 months

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Own Your Own Internet Store

by sports111opp＠hotmail.com

An HTML attachment was scrubbed... URL: http://www.classiccmp.org/pipermail/cctalk/attachments/19991123/1fd7d4c1/at…

26 years, 7 months

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Own Your Own Internet Store

by yen111opp＠hotmail.com

An HTML attachment was scrubbed... URL: http://www.classiccmp.org/pipermail/cctalk/attachments/19991123/966e6bbe/at…

26 years, 7 months

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Tektronix u8002 uProcessor Lab (MicroProcessor Developement System)

by rigdonj＠intellistar.net

Does anyone have one of these? I picked up the manuals for one and it looks like an interesting device. Joe

26 years, 7 months

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FW: Used PDP Equipment.

by kyrrin＠bluefeathertech.com

I have no clue what this guy is selling. The fact that he's posting >from an AOL account bothers me a bit. Still, he may have something of interest. Contact him directly if you're curious. -=-=- <snip> -=-=- On 23 Nov 1999 05:19:02 GMT, in comp.os.rsts you wrote: >>From: reddogno1(a)aol.com (Reddog no1) >>Newsgroups: comp.os.rsts >>Subject: Used PDP Equipment. >>Lines: 3 >>NNTP-Posting-Host: ladder06.news.aol.com >>X-Admin: news(a)aol.com >>Date: 23 Nov 1999 05:19:02 GMT >>Organization: AOL http://www.aol.com >>Message-ID: <19991123001902.10768.00001374(a)ng-fm1.aol.com> >>Path: news1.jps.net!news-west.eli.net!sdd.hp.com!enews.sgi.com!newsfeed.mathworks.com!portc04.blue.aol.com!audrey05.news.aol.com!not-for-mail >>Xref: news1.jps.net comp.os.rsts:19 >> >>Does anyone know who would like to purchase used PDP Equipment? >>Please reply to Reddogno1(a)aol.com >>Thank You. -=-=-=-=-=-=-=-=- Bruce Lane, Owner and head honcho, Blue Feather Technologies -- kyrrin (at) bluefeathertech [dot] com Web: http://www.bluefeathertech.com "...No matter how we may wish otherwise, our science can only describe an object, event, or living thing in our own human terms. It cannot possibly define any of them..."

26 years, 7 months

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HP's not cool? (was Re: pdp-11/60 Semi-Rescue)

by edick＠idcomm.com

I have to agree, though they never could build a 'scope that would trigger they way you'd have liked . . . Their downfall, by the way, seems to have coincided with their move into computers. For a time this seemed OK. Their notion of "user-friendliness" was looking like a pretty good one in their logic analyzers too, but I don't remember an HP computer product, particularly once they absorbed APOLLO, for which any installation/upgrade, no matter how minor didn't involve 3 layers of system downtime, on the order of 3 days per workstation, i.e. if you had one server and three stations, you had 3 instances of 9 days of downtime, say, to get the updated simulator libraries realigned, though they were supposed to work "out of the box" but didn't. We had more servers and more stations, so there were more instances of longer downtime. Though I did object to the choice of HP, I was still mightily embarassed by the fact that after having HP CAD/CAE systems for a year, they still couldn't be relied upon to do what any PC could do. Dick -----Original Message----- From: Tony Duell <ard(a)p850ug1.demon.co.uk> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Sunday, November 21, 1999 10:00 AM Subject: Re: HP's not cool? (was Re: pdp-11/60 Semi-Rescue) >> >> I think anyone who has been hooked by HP gear would say the same thing. >> Even before anything with the HP logo on it could grab my undivided >> attention, I was always amazed at the kind of ingenuity and engineering >> brilliance that went into the physical design of the systems. > >Yep... HP stuff _used_ to be very well engineered, both electronically >and mechanically. The 9100 is a total work of art, for example :-). I >love working on such machines. > >Just a pity that modern HP stuff is nowhere near as good, and that their >support at the moment is a total joke. > >-tony >

26 years, 7 months

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Yet more on -8/m Mem problems

by healyzh＠aracnet.com

>> I had the following results when depositing 7777 to the memory. >> >> Memory locations: xxx0 - xxx3 don't save anything >> Memory locations: xxx4 - xxx7 save 7760 > >OK, on the G227 card there's a pair of 8251 decoders at locations E46 and >E39 that decode the lowest 3 address lines, along with the Read H signal. >E46 handles locations xxx0-xxx3 and E39 handles xxx4-xxx7 (at least if Unfortunatly I won't be able to look into this until I get off work tonite, or tomorrow before work. If nothing else I'll try and hit the books tonite and get some of the preliminary research on this done. BTW, does anyone know of a way to read the TIFF's on Highgate on a UNIX box, for when I don't have the paper copies of the Maintenance manual handy, but have a chance to do a little reading? It would be nice if XV can handle them, but it only seems to be able to display the first page. >> Also step 6 tells me to check the resistance of diodes FSA2501. Um, >> someone mind explaining how to do this exactly? Beware, I don't have the >Then for each diode pack, check for diode action [1] between pin 1 >(common cathode) on the chip and pins 3,12,2,5,8,7,11,9 separately (8 >tests). Then do the same between pin 14 (common anode) and >3,12,2,5,8,7,11,9 (8 more tests). Terrific! This is exactly the info I was looking for! I'll have to double check tonite, and redo my readings, but I think the core board is OK. >HOWEVER. Diodes are non-linear components. It's not meaningful to talk >about the forward resistance unless you specify the current that was used >to measure it. Different meters (and even the same meter on different >ranges) can give very different results. My guess is that the figures >given in 4.7.1 in the manual relate to a particular type of meter (the >Triplett Model 310 mentioned in Table 4.1?), and you might get very >different results on a working board. This and the pinout above look to explain my problems with checking the FSA2501's. I'm showing about .8 MegaOhm's one direction, and infinite the other direction. I'm using a Fluke 77III Digital Multimeter to take the readings. That's so far off from the ranges given in the manual, that I was fairly sure I was doing something wrong. After all I think the manual says something like 25 Ohms, while I'm getting .8 MegaOhm's. I still find that a little hard to believe. This morning I went so far as to try and check out ALL the X-Y lines and Sense-Inhibit lines running through the core. I'm fairly sure the core plane itself is intact. Thanks for all the great info Tony! I'm starting to think I might just be able to get this fixed. Zane

26 years, 7 months

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HP stuff (was HP's not cool)

by aek＠spies.com

"Can you point me to some more info on the HP's. I learned basic on HP2000c's but I'd like to understand the hardware design on 'em. " Jeff Moffatt's site is a good place to start http://oscar.taurus.com/~jeff/2100/

26 years, 7 months

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Looking to benchmark my 8/S.

by dylanb＠sympatico.ca

If anyone out there is running FOCAL,1969 (standalone) and can send me the amount of time it takes their PDP-8 to come back with the result of these functions(not including the teletype time) I would appreciate it. I have the 8/S clocked at: TYPE 1067^56 5 seconds TYPE FSQT(1067^56) 4 seconds TYPE FSQT(123^789) 25 seconds. This is a quick test and I will try some other functions..... I am going to try this on the 8I.. I would appreciate the results from a straight-8, and an 8/E. BTW: This is a great "light bulb" test. john

26 years, 7 months

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Have dinosaur - need paper.

by rigdonj＠intellistar.net

I knew that would get your attention! I picked up an old HP 7245B printer/ plotter that uses thermal roll paper with tractor feed holes on the edges and a notch at the top of each page. Does anyone know where I can get paper like that? I don't know the HP part nuber for it but I do remember that they also sold the same kind of paper except it was fan fold instead of rolled. I can use the fan fold stuff in a pinch. Thanks, Joe

26 years, 7 months

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Did the list change?

by jfoust＠threedee.com

I've been unable to receive anything from the CCC listproc for about a month. When I send to the listproc, I don't even get a response. My mail unblocked for a few days at the beginning of this after we tweaked something at my ISP, but then it stopped again, and now I'm not sure what's the root of the problem. I tried to get a response fom Derek Peschel but he must be busy or missed my message. Does anyone know an admin at U-Wash who might be able to tell me why the listproc is rejecting mail addressed to me? An alternative mailing address for me is mr128(a)yahoo.com . - John

26 years, 7 months

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DEC field service (was Re: HP's not cool? (was Re: pdp-11/60 Semi-Rescue))

by allisonp＠world.std.com

<> > ...And you folks make fun of old DEC Field Service guys 8-( <> <> No, the OLD field service guys were great. (At least, many of them <> were.) I had the honor of working with a number of the old guard Field engineers that knew the pointy end of a soldering iron from a scope probe. There were few left by the late 80s that could still setup flight times for the hammers on the big printers or setup a unibus crate. Then there were the new kids that we wouldn't let have more than basic screwdrivers. Allison

26 years, 7 months

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HP's not cool? (was Re: pdp-11/60 Semi-Rescue)

by cem14＠cornell.edu

"Tony Duell" wrote: > Just a pity that modern HP stuff is nowhere near as good, and that their > support at the moment is a total joke. > > -tony Like others, I also disagree, at least in part. I think that it is pretty clear that "consumer electronics" HP products that are marketed for home use (Pavillions, IDE CDrom burners and the like) are awful in terms of quality. One of the most deplorable products that they have ever put out is the craddle for the HP 320LX and other such palmtops. Due to a design flaw, it can be easily bent along a certain axis, resulting in poor, intermittent connection and corresponding profanity by the user. Easily the worst mechanical design I have ever seen. But the enterprise-level stuff is still pretty robust (and, as always, $$pricey$$ ). In the computer and electronics labs here, where stuff undergoes inhumane abuse by students, it is still the HP equipment that lasts longest. Most, if not all, of the 715's and 720's that were bought ca. 1993 are still working. I don't remember any that was retired due to malfunction; rather, people upgraded. I have a stand-alone 735 that has been down two times since 1995, once because of a power failure that downed every machine in the building and another because of an OS upgrade. The newer workstations seem to be just as reliable by the account of my colleagues. Regarding your hp49, isn't this the first model churned out by the calculator division after its relocation to Australia? I agree that materials and durability have been downgraded; the 48SX is known for its easy-to-crack LCD, and I imagine that the 49 is worse. Like Joe, the last hp calculator that I really like is the hp71b. Which "advertised feature" did you not find in the 49? -- Carlos Murillo-Sanchez email: cem14(a)cornell.edu 428 Phillips Hall, Electrical Engineering Department Cornell University, Ithaca, NY 14853

26 years, 7 months

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E.U.N.U.C.H.

by allisonp＠world.std.com

For laughs I've been running a 486dx/33 (intel) at 66mhz in a dell box. The only mod if the heat sink is a moose I had and its attached to the chip using a BEo filled thermal epoxy. Runs cool and it's solid. I've tried that in a socket5 Mb I have using a 486dx2/50 at 100mhz, seems fine after three months. The cooling is not big a problem. I consider both abuse, but hey I have a few. Besides I've done that before with 8085s and Z80s with no ill effects. Allison

26 years, 7 months

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lasner@unc.edu ?

by IVIE＠cc.usu.edu

> This came up at dinner with Eric Smith on Friday. Is Charles Lasner > (lasner(a)unc.edu) still with us? I have a bad feeling about this.. > This email adr doesn't work any more, and the last posting from him > was in 1996. I've heard nothing from him since about that time. I've also asked this question several times over the last few years and never received a definitive response. Roger Ivie ivie(a)cc.usu.edu

26 years, 7 months

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Racks ?

by truthanl＠oclc.org

24" wide cabinet are typically Telephone equipment racks. -----Original Message----- From: lwalker(a)interlog.com [mailto:lwalker@interlog.com] Sent: Sunday, November 21, 1999 10:40 AM To: Discussion re-collecting of classic computers Subject: Racks ? I've been offered 2 castored racks by the owner of the place I am using temporarily for storage, which were abandoned by a previous occupant. They are about 5' high by 24'' wide with lockable front and rear doors. One of the rear doors had been forced open and I only got a quick glance inside. I made out a micropolis(IIRC) mfr. label on one module and a large "PDP 4800" stencil on another one which looked like a PSU. There were about 20 DB25 cables connected to one of the modules. I'm a complete novice when it comes to mini's, and due to storage space limitations plus that I would also have to remove them when I vacate my locker I've been reluctant to take them. Anyone have any idea on what they might be ? I realize this is not much info and will be looking at them again when I have a flashlight and a means of forcing open a front door panel. ciao larry

26 years, 7 months

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lasner@unc.edu ?

by CLASSICCMP＠trailing-edge.com

>This came up at dinner with Eric Smith on Friday. Is Charles Lasner >(lasner(a)unc.edu) still with us? I have a bad feeling about this.. >This email adr doesn't work any more, and the last posting from him >was in 1996. You might try "lasner(a)metalab.unc.edu". From my account there: $ run [.fish]fish _Host: login.metalab.unc.edu _Port: Connected to host titan.metalab.unc.edu, port 22. Remote version: SSH-1.5-1.2.26 %FISH-I-INFO, Exchanging Keys %FISH-I-INFO, Cipher: blowfish Logging in as user shoppa Password: %FISH-I-INFO, Entering interactive mode Last login: Tue Nov 16 22:17:33 1999 from timaxp.trailing- No mail. Sun Microsystems Inc. SunOS 5.6 Generic August 1997 NOTICE - We are no longer sunsite.unc.edu; we are now MetaLab.unc.edu Be sure to make all new links, e-mail, etc refer to MetaLab.unc.edu [titan.oit.unc.edu]</export/sunsite/users/shoppa>% finger lasner Login name: lasner In real life: Charles Lasner Directory: /export/sunsite/users/lasner Shell: /bin/ksh Last login Mon Nov 22 01:48 on 2 from 216-59-45-177.us No unread mail No Plan. -- 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, 7 months

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11/60 Rescued!

by mcquiggi＠sfu.ca

Hi Gang: It is with pleasure that I report that the pdp-11/60 in Vancouver has been rescued! Eric Smith flew up from San Jose today, and we rescued the beast, moving it to a temporary storage locker until Eric can re-attend and drive it back down south. It was a _very_ long day, especially for Eric, what with flying etc. We were fortunate that the person with the machine, Dallas Hinton, lives next to a lumberyard. He has good relations with the staff, and was able to borrow a forklift (and operator) from them. This made loading the behemoth (CPU unit about 600 lbs) quite easy. Also picked up were two RK06 drives, a Dilog front-loading high density tape drive, VT52, DECwriter II and III, boxes and boxes of docs, software, and disk packs. The only rental truck available on 1 day notice was a 5 ton monster from Ryder. The gear fit easily in the back. We roped it in as best as possible, but alas during the 7 mile drive between Dallas' and the storage locker place, the CPU unit broke its ropes, and despite being restrained by boxes of docs and the terminals, rolled around and dented the back of the tape drive unit. No real damage was done, and the load arrived intact. The next challenge was getting the CPU cabinet and other units down the ramp at the back of the truck - no liftgate available, and no forklift at the mom-n-pop self storage. So Eric and I gritted our teeth and with much physical effort managed to roll the units down the ramp _without_ having them either collapse the ramp or fall off to either side. The other stuff was moved much more easily, and all of it (save some docs which Eric wanted to get home for review) is now safely stored. The machine is in great shape, has all panels, doors. We didn't have a camera available, due to the short notice. I'll try to take some photos once Eric comes back to drive the machine down to San Jose. A liftgate equipped truck will be mandatory - we'd never be able to get the machine back up the ramp by pushing/pulling. Hmmm a block and tackle or winch might work too... Thanks to Dallas Hinton, and the folks on the list who wrote in support of saving this old machine. Great thanks to Eric for making the supreme short notice effort to come up and get the 11/60! The scrap dealer is still coming to Dallas' place on Monday, but now it'll only be for some broken old Wang terminals (not worth saving, you had to see them, trust me!). That's it from Vancouver, Kevin -- Kevin McQuiggin VE7ZD mcquiggi(a)sfu.ca

26 years, 7 months

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Panasonic 8" Floppy Drive

by edick＠idcomm.com

I never gave this much thought because I have a compaticard, though I have never used it. I've taken it out of the box, though, hence the manual, floppy, and board are all in different (and unknown) places. There's no doubt that the 765, which is the controller on which essentially all PC FD controllers is definitely SD capable, since it's also used in one of my S-100 systems where it does SD every day. Surely there's some way to fool the FDC, perhaps by talking to it directly to accomplish a few simple operaitons, which will enable you to read/write SD 8" diskettes. I say this because the data rate for SD 8" is the same as for DD 5-1/4, so the clock must be there. The rest has got to be software once you've got the cable made. Dick -----Original Message----- From: Don Maslin <donm(a)cts.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Sunday, November 21, 1999 4:44 PM Subject: Re: Panasonic 8" Floppy Drive > > >On Sun, 21 Nov 1999, Olminkhof wrote: > >> I've found a box with 2 x 8" floppy drives. . . . external to some unknown >> computer. >> >> The box is a Panasonic JB3038P and inside are 2 X JA751 drives. >> The drive connectors and the cable coming out of the box are all 50 pin, >> exactly like an internal SCSI cable. Unfortunately it isn't recognised by a >> SCSI controller, at least not without fiddling with parity and stuff like >> that. >> >> Does anyone know what this might have been for? >> >> SCSI 8" floppy drives would have been great cos I don't think I'm ever going >> to find a compaticard ! >> >> Hans > >You may not even need a CompatiCard, depending upon the disks that you >intend to read. You 'wire weave' a cable between a 50-pin SA800 >connector and the usual 34-pin FDC connector using the information >below: > >******************************************************************** > > The following table is extracted from the CompatiCard manual: > > Card 34 37 50 8 Inch Drive >Signal Name Pin Pin Direction Pin Signal Name >======================================================================== >Programmable 2 3 ---> 2 Low Current >Index 8 6 <--- 20 Index >Drive Select 1/3 12 8 ---> 28 Drive Select 2 >Motor Enable 1/3 16 10 ---> 18 Head Load >Step Direction 18 11 ---> 34 Direction Select >Step Pulse 20 12 ---> 36 Step >Write Data 22 13 ---> 38 Write Data > >Write Enable 24 14 ---> 40 Write Gate >Track 0 26 15 <--- 42 Track 0 >Write Protect 28 16 <--- 44 Write Protect >Read Data 30 17 <--- 46 Read Data >Select Head 1 32 18 ---> 14 Side Select > >Connect odd number pins of 34 pin connector to odds of 50 pin connector >Connect pins 21/37 of the DB-37 to all the odd pins on 50 pin connector > >************************************************************************ > >If the disks you intend to read are double density a HD (1.2mb/1.44mb) >capable FDC should work fine. If they are SD, you may be in some >difficulty. However, there are 8-bit HD capable FDCs with onboard BIOS >that are capable of handling that also. > > - don > >

26 years, 7 months

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lasner@unc.edu ?

by aek＠spies.com

This came up at dinner with Eric Smith on Friday. Is Charles Lasner (lasner(a)unc.edu) still with us? I have a bad feeling about this.. This email adr doesn't work any more, and the last posting from him was in 1996.

26 years, 7 months

1
0
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PDP-11 Freeware CD's under emulators

by CLASSICCMP＠trailing-edge.com

>Perhaps Tim Shoppa or Megan Gentry could comment on the >legality of using PUTR to split apart SIG tapes into their smaller >DSK files. The RT-11 (and RSX-11 and RSTS/E and ...) SIG tapes, like all DECUS contributed material, had their authors sign pieces of paper stating that the material can be redistributed and repackaged as necessary. So there's no problem with manipulating any of these as you need or desire. John Wilson, at the top of PUTR.DOC, says: PUTR is a copyrighted but freely distributable utility for transferring files between various file systems and various media. He doesn't put any limitations on its use. So I see no difficulties with using PUTR to do anything you want with the PDP-11 freeware archives. -- 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, 7 months

3
3
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Great Saturday

by CLASSICCMP＠trailing-edge.com

>9. Something TG Products in Planto TX has mounting for 6 chips each with = >it's own switch ????? Seeing how much of the rest of the stuff you got was Apple ][-related, I'll hazard a guess that this is a switchbox for allowing multiple Joysticks/ Paddles/etc. to be switched for use on a single Apple ][. The "old" ][/][+ joystick/paddle connector was the DIP socket and plug. The Koala Pad that you picked up emulates a Apple analog joystick, BTW (or two paddles, if you prefer to think like that!) 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, 7 months

2
1
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Apple ][+ find and info/sw request...

by edick＠idcomm.com

I've never seen an Apple ][+ which didn't "do" color. It was not unusual to see them hooked to the TV. Often there were two floppy drives, and a 9" Sanyo B&W "security" monitor sitting on top of the Apple][+ box with a feed-through to an overhead mounted color monitor, 27" or so, for people in a classroom to watch. Dick -----Original Message----- From: Jay West <west(a)tseinc.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Sunday, November 21, 1999 4:35 PM Subject: Apple ][+ find and info/sw request... >My dad was cleaning out part of the garage and came across the Programmer >Reference Card for the S-C Assembler II Disk version 4.0 for the >pple ][ and Apple ][ Plus. > >Gawd does it bring back memorys of leaning assembler on my Apple ][+! Now >that I have the reference card and all the refreshed memories, is there any >chance anyone has the software itself laying around on a floppy? > >Additional question - when I had my apple ][+ at around age 15 or so, I >always used a monochrome monitor. I never had color before I got rid of it >around age 20. I was wondering - does a stock apple ][+ support a color >monitor or is it monochrome via the RCA jack unless you get an add-in card? > >Thanks in advance for any replies! > >Jay West >

26 years, 7 months

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Argh!!! PDP-8/m Memory

by ethan_dicks＠yahoo.com

--- Tony Duell <ard(a)p850ug1.demon.co.uk> wrote: > > Been looking through the maintenance manual, and it looks like among the > > things I need to do tomorrow to check this out is to test voltages on both > > the G104 and G227 boards. This has me wondering, does it matter if the > > order is G104/H220/G227, or can you order it like G227/H220/G104 for > > testing so you can take readings on the G227 board? > > AFAIK, you must put the core stack in the middle (so the top connectors > all fit), but you can have the outer boards either way round. All Omnibus > slots are equivalent, and the top connectors are symmetrical as well. One point about "symmetrical"... you _do_ have the core plane in right-side up, don't you? IIRC, the OMNIBUS side of the core stack is the one with only grounds on it; the connectors with all the signals going to and fro is for the top. I'm not saying you did it, but it'd be easy to reinstall the stack with the top side down. -ethan ===== Infinet has been sold. The domain is going away in February. Please send all replies to erd(a)iname.com __________________________________________________ Do You Yahoo!? Bid and sell for free at http://auctions.yahoo.com

26 years, 7 months

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test-drb