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

by pete＠dunnington.u-net.com

On Jul 25, 17:08, Adrian Graham wrote: > Hi folks, > > Assuming I eventually get this monitor working properly with the missing > blue signal whilst looking for bumf about it I found this document that > basically says I can turn it into a PC-compatible 1280x1024 70-75hz monitor > for ~$10. > > http://frauenweb.at/~tina/myhtml/howto.html > > Anyone heard of this one? It seems so straightforward I'll do it..... I've not seen that particular document before, but IIRC that monitor is actually a Sony GDM1960 (or near equivalent), and those were made in various OEM versions for HP, Sun, Dec and possibly SGI, differing mainly in the fitting of the sync sockets. I've seen at least one other account of a successful addition of two caps, two resistors, two sockets, and links to make it work. There's a way to add just one socket for composite sync, too. > The question that leaps mindwards is if it's a fixed freq monitor what > happens to the PC at boot time - do I still see a v.small DOS boot screen Nope :-( And it might not be a good idea to run it at the wrong sync rate for too long. > or > do I get nowt until my GeForce has been fully initialised at 1280x1024? Yup :-) -- Pete Peter Turnbull Dept. of Computer Science University of York

25 years, 11 months

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PDP 8/e power wires

by cmcmanis＠mcmanis.com

At 05:00 PM 7/25/00 -0700, I wrote: > > White is "hot", black is "neutral" and green is ground. Most of the screw > > on plugs have a legend on them or on the package. Remember they are > > designed for people who have no training to install. Fred Corrected: >I always thought that the "usual" color code for electrical wiring was >BLACK is HOT, WHITE is NEUTRAL, and green is ground. Am I remembering it >wrong? or is the PDP 8/e backwards from everything else? Nope, I'm the one that was wrong, fortunately several people have corrected me so hopefully Laweence won't get it backward. >'Course, if you soak them in WD-40 long enough, it might not matter. Of course it doesn't matter after soaking, WD-40 is such a great lubricant it allows the electrons to actually slide over to their correct conductor! --Chuck

25 years, 11 months

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Back to the A1097C monitor again

by agraham＠ccat.co.uk

Hi folks, Assuming I eventually get this monitor working properly with the missing blue signal whilst looking for bumf about it I found this document that basically says I can turn it into a PC-compatible 1280x1024 70-75hz monitor for ~$10. http://frauenweb.at/~tina/myhtml/howto.html Anyone heard of this one? It seems so straightforward I'll do it..... The question that leaps mindwards is if it's a fixed freq monitor what happens to the PC at boot time - do I still see a v.small DOS boot screen or do I get nowt until my GeForce has been fully initialised at 1280x1024? TIA a

25 years, 11 months

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DEC Rainbow Saved

by bbrown＠harper.cc.il.us

I saved a DEC rainbow from the landfill this morning. I have the system, the monitor but no keyboard. Any idea where I can get a keyboard and possibly some software for it? thanks! Since I don't have a keyboard, I don't konw if there is anything on the hard drive. -Bob

25 years, 11 months

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PE/Concurrent stuff on the East Coast.

by aek＠spies.com

Thought someone on the East Coast might be interested in this From: Harold Herstein <hiherstein(a)prodigy.net> Subject: Interdata / Perkin-Elmer / Concurrent I'm writing because I have access to a slew of Pekin-Elmer / Concurrent stuff that will be trashed if I can't find them a home QUICK. I don't have time to inventory any of the stuff so I can't tell you exactly what's there. I know that there are 1-2 virtually complete sets of OS/32 reference manuals in binders (most likely circa version 6.3 and 7.2) plus assorted other manuals. There may be hardware reference / maintenance manuals as well. It is a good amount of material, perhaps 4 feet tall (maybe more). I also have a Concurrent 32/30 and a 32/05 that are in 19" cabinets. They worked once upon a time, and I believe most of the boards that are there work, but I tend to doubt that they are functioning as a system the way it is (there may have also been boards removed or swapped with defective onece to keep some other systems working). There are no disks - since these crapped out long ago.

25 years, 11 months

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Switching PSU Theory of Operation / Repair Tips & Techniques

by dhquebbeman＠theestopinalgroup.com

> > So, I'd like to eventually repair it. It's a monster, and > > potentially lethal. From poking around with a voltmeter, > > I can see that it chops the AC to DC and doubles the voltage > > to about 280 volts, one positive supply, one negative supply. > > Ok, so it's a switch mode power supply that produces +280v and -280v (wrtg) rails right? > Is this used as a rail to feed low voltage supplies, or are they generated in the main supply. > Or do you REALLY mean that it produces a postive and a negative with 280v across them? > That is what I would expect to see. No, if I measure across the positive and negative, I'm seeing nearly 600vdc. These HT supplies appear to feed the switching section of the PSU. Here's a quote from a former prime engineer (who's been as helpful as his memory permits): : These things are much more complicated than that. Functionally the Line is : directly connected to a special rectifier configuration called a voltage : doubler. It produces rougly 280 volts DC. There is no isolation transformer, : which makes these things potentially lethal. The 280V DC is input to : switcher, which runs the 280V DC through the torroidal transformers to : produce the other voltages. The Big Bridge is to convert the output of the : switch from high frequency (probably about 25Khz) AC to DC. [..snip..] > ****PAGING TONY DUELL**** Tony's aware, and has replied with useful information. Even with a dozen people helping, I'm not expecting to get this repaired over night. If I manage to get it repaired sometime next year, that would be cool. > A circuit diagram would be useful here, but psu's aren't THAT > complicated really. Often the type of fault will indicate where the > problem lies. I can probably sketch the HT portion out, but this PSU includes two rather complex looking boards (although they're only 2-layer) with custom PALs and the like. One symptom I hope leads me to finding the problem is that the PSU has four LEDs onit, 3 green, 1 yellow, the green are status indicators for +5, +12, & -12; the yellow LED is an indicator for the AC. Although the AC feed to the PSU is fine, the yellow LED glows dimly, not brightly, as it once did. The green LEDs are unlit. > I take it the 280v rails you mention are still present in it's non > functional condition? Yes. > That suggests that the mains rectifier is still functional, they don't > 'chop' the ac mains. Uh, being an analog idiot, forgive me if this is a stupid remark, but I thought "chopping" the AC with a rectifier yielded DC; when I measured the ~300v, I was on the DC scale, and I didn't see the needle vibrate like I have in the past when I stupidly tried to measure AC in DC mode. Right now, I'm stuck using this old Radio Shack analog VM; my Fluke is in need of a new LCD display. :-( > Switch mode supplies generally rectify and filter the mains, > and use the resultant 250-350vdc to drive the rest of it. > If you have no low voltage stuff running, and no blown > fuses, it could be as simple as a startup resistor being > open circuit. Look for a high value (~300k - 1Meg) resistor > from the + side of the dc rail to the electronics of the switch > mode supply. These go open circuit at switch on fairly often, > and the supply doesn't get the initial starting pulse it needs. If it matters, the room in which I keep the Prime was hotter than I usually let it get when I have the Prime running (I don't have central A/C, so I have a window unit in an adjacent bedroom and usually use a fan to direct the cool air into the room with the Prime while it's up. That night was hot and I had the air directed instead to my bedroom, so I was running the Prime warmer than I had been, but not, I didn't think, out of spec (site prep guide says 86 degF top ambient temp). So, keeping in mind someone else said that dust is the enemy of a power supply, and being able to tell you that the PSU was indeed dusty inside (the only thing I didn't pull and clean when the system was delivered), and I operated it kinda warm, if the resistor is an item likely to die if it can't dissipate enough heat, then I'll look for that. > ****WARNING**** > These supplies are filtered by one or more largish reservoir > capacitors that can and do store a potentially dangerous amount of > power, they are DANGEROUS even when the unit is off and unplugged until they are > discharged. They may or may not have a bleed resistor across them. I > strongly recommend that you check with a meter after about a half hour > with it switched off to see if they have discharged before you stick > fingers in there or you might get a nasty surprise. I've been measuring across the caps before I touch anything. > If you identify a likely resistor, you will find that you get ambiguous > readings unless you remove it from the circuit. Open circuit startup > resistors are a common fault in switch mode supplies. It's gonna be a bit of a chore to disassemble the PSU, it's in a form factor that allows it to plug into the backplane; separating the supply PCB from the aluminum carrier will be a bitch, and I don't have a lab bench anymore. Damn, I miss my lab bench! > > possible for devices that vary in design not only from > > manufacturer to manufacturer, but wven model to model? > > Never fixed TV sets have you. :^) Emphatically yes. > > Hope this helps. Thanks Geoff! -dq

25 years, 11 months

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Fwd: hx-20

by owad＠applefritter.com

Can anybody help him? Tom ====== Forwarded Message ====== Date: 7/25/00 7:27 AM Received: 7/25/00 5:28 AM From: selvyn(a)gold.guate.net (Selvyn Ambrocio) To: owad(a)applefritter.com Hello Tom, I have two HX-20 at my office, but I have a Problem I need read the basic program to make a copy but I cann't. Do you know how read the basic program? With Ctrl + @ I can Break the autoexec, but not respond ====== End Forwarded Message ====== ------------------------------Applefritter------------------------------ Apple Prototypes, Clones, & Hacks - The obscure, unusual, & exceptional. ---------------------<http://www.applefritter.com/>---------------------

25 years, 11 months

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Vintage prices dropping on eBay?

by dhquebbeman＠theestopinalgroup.com

> I got a reply from one Max Burbank who said only this - "While the Computer > Museum has closed, We have incorporated some of it's exhibits and it's > mission into our own. For all the details, Follow this link; " and he gave a > link to the Computer Section of the Boston MOS, which ultimately came up > with nowt to say what had happened. Here's the link: > http://www.mos.org/tcm/tcm.html Down at the bottom of the page pointed to by the link above, there was a link to a page about how the MoS and TCM have joined forces, as you can see in this quote: : The History Center, originally a part of The Computer Museum : in Boston and now located in Mountain View, California, is : currently an applicant to become a separate non-profit : institution. The Center plans to build a permanent Silicon : Valley facility to house the Museum's artifact collection and : serve as an international center for research into the : history of computing. Last year, NASA Ames guaranteed the : Center a long-term lease on two acres of land at Moffett : Field, adjacent to the location of the future home of the : California Air and Space Center. The home page for The Computer Museum History Center is: http://computerhistory.org/ Hoping that ends the confusion, if not the frustration, -doug quebbeman

25 years, 11 months

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Vintage prices dropping on eBay?

by dhquebbeman＠theestopinalgroup.com

> > I mailed them afterwards asking what had happened > > and all they could say was the collection still exists. > > Helpful, that. > > Hasn't it been shipped to California? The Computer Museum > History Centre? Moffat Field? Or am I getting confused? I believe this is correct. -dq

25 years, 11 months

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Vintage Computer Festival 4.0 Update

by vcf＠siconic.com

Sellam International Man of Intrigue and Danger ------------------------------------------------------------------------------- Looking for a six in a pile of nines... VCF 4.0 is September 30-October 1 San Jose Convention Center, San Jose, California See http://www.vintage.org for details!

25 years, 11 months

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Switching PSU Theory of Operation / Repair Tips & Techniques

by dhquebbeman＠theestopinalgroup.com

> No, if I measure across the positive and negative, I'm seeing > nearly 600vdc. Let me corrct this, I get the near 600 when I measure across the + terminal of one of the blue electrolytics and the - terminal of the other (there are 2 the same size, and a third that's larger). -dq

25 years, 11 months

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TI Silent 700 terminal

by dhquebbeman＠theestopinalgroup.com

> On Mon, 24 Jul 2000, Paul R. Santa-Maria wrote: > > > I just picked up a TI Silent 700 terminal from a local college. It has the > > keyboard, printer with some paper, acoustic coupler, and cover. I have not > > even tried to turn it on yet so I do not know if it works. > > > > 745 Portable > > Part number: 0983801-0003 > > Serial number: 0474656335 > > Volts: 120 VAC > > Freq: 47-63 Hz > > Amps: 1.0 A > > Watts: 75 W > > This is the most common of the models. More common than dirt. I'm not sure, I think the ugly little 707s may have been more common, as they appear to have been popular with real estate agents, and you just can't swing a dead cat without hitting a real estate agent (now THERE's an idea for a new sport!). -dq

25 years, 11 months

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Switching PSU Theory of Operation / Repair Tips & Techniques

by dhquebbeman＠theestopinalgroup.com

My Prime 2455's PSU died last week. A replacement has been offered and will undoubtedly arrive sooner than a repair will take place. But I have to deep-six this monster, as they just don't make them anymore, and buying a used one >from a reseller is likely to be cost prohibitive. So, I'd like to eventually repair it. It's a monster, and potentially lethal. From poking around with a voltmeter, I can see that it chops the AC to DC and doubles the voltage to about 280 volts, one positive supply, one negative supply. >From there, I'm lost. Has anyone every written up a general description of troubleshooting and repair techniques? Is it even possible for devices that vary in design not only from manufacturer to manufacturer, but wven model to model? tia, -doug quebbeman

25 years, 11 months

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DEC Rainbow Saved

by agraham＠ccat.co.uk

True - ta Tony, I should've clarified that. > -----Original Message----- > From: ard(a)p850ug1.demon.co.uk [mailto:ard@p850ug1.demon.co.uk] > Sent: 24 July 2000 21:06 > To: classiccmp(a)classiccmp.org > Subject: Re: DEC Rainbow Saved > > > > > > Yep. Strictly speaking any of the RJ11-ended keyboards should work. > > To avoid confusion if people read the list archives, I think I should > clarify that any of the _DEC_ RJ11-ended keyboards will work with the > Rainbow. Other companies used RJ11 connectors on their > keyboards (Apple > Mac, for example), and these most certainly don't go on the 'Bow. > > -tony >

25 years, 11 months

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TI Silent 700 terminal

by dhquebbeman＠theestopinalgroup.com

> Anybody have any interest in a TI Silent 700 terminal? I just > rescued one from a local shop. Even has about a third of a roll > of thermal paper left, and appears to work fine (other than needing > the printhead cleaned). Has clamp-on cover with handle, too. The Silent700 model I'm most interested in was the unit that had the dual digital casette drives that were arranged above the unit. I haven't seen one since the 70's; my Sol uses a keyboard from one. Anyone know what it's model number was? -doug quebbeman

25 years, 11 months

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TI stuff and car dealerships

by xds_sigma7＠hotmail.com

Hmmm... this whole silent 700 thread makes me wonder about the whole TI-Car dealership connection.. I recently bought something like 13 or so TI-990 boards from a guy who said he got them from a car dealer... Unfortunately, no docs, no cables, no chassis, not enough to assemble one computer, etc. Turned out to be components of 2 seperate machines, have one 990/10A CPU, one board from a 990/12 CPU, one meg of cache, and a bunch of random comm boards. Also got a funky TI video terminal from him, hasn't arrived yet but it uses an optical cable... damn odd Will J ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com

25 years, 11 months

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DEC Rainbow Saved

by agraham＠ccat.co.uk

Yep. Strictly speaking any of the RJ11-ended keyboards should work. > -----Original Message----- > From: Bob Brown [mailto:bbrown@harper.cc.il.us] > Sent: 24 July 2000 13:07 > To: classiccmp(a)classiccmp.org > Subject: Re: DEC Rainbow Saved > > > I happened to aquire an LK401 keyboard (attached to a vt320 > terminal).. > will this keyboard work with a rainbow? > > thanks. > > -Bob > > > > > > > > > I saved a DEC rainbow from the landfill this morning. > > > > > > I have the system, the monitor but no keyboard. > > > > > > Any idea where I can get a keyboard and possibly > > > some software for it? > > > >The keyboard is a standard DEC LK201 unit. This is the same keyboard > >that's used on the VT220 terminal, VT300 series, etc. So it > shouldn't be > >too hard to find one. Most DEC enthusiasts probably have a > number lying > >about. > > > >As regards software, ftp://ftp.update.uu.se/pub/ had some > stuff for the > >'Bow when I last looked, but I don't know if it's still active. > > > > > >-tony > > Bob Brown > Saved by grace > Intranet Sysadmin Page: http://info1.harper.cc.il.us/~bbrown >

25 years, 11 months

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Repair or Replace? [Was: Repairing Timex]

by agraham＠ccat.co.uk

> Maybe it was Farnell, then... > Not being 'in the trade' any more I don't get to see the latest RS or > Farnell catalogues :-( RS still sell a lot of Xcelite driver kits, but they only seem to do one small vinyl roll kit that includes TORX, and it's a tad expensive - ukp48! Bit much for li'l ol' me.

25 years, 11 months

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OT: funny eBay thing

by Marion.Bates＠dartmouth.edu

A non-text attachment was scrubbed... Name: not available Type: text/enriched Size: 540 bytes Desc: not available Url : http://www.classiccmp.org/pipermail/cctalk/attachments/20000724/7cc8af34/at…

25 years, 11 months

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Vintage prices dropping on eBay?

by agraham＠ccat.co.uk

Yes, but when are they going to drop far enough for me to afford another Lisa! :) > -----Original Message----- > From: Sellam Ismail [mailto:foo@siconic.com] > Sent: 24 July 2000 16:11 > To: classiccmp(a)classiccmp.org > Subject: Re: Vintage prices dropping on eBay? > > > On Mon, 24 Jul 2000, Wayne M. Smith wrote: > > > Anyone else noticed that prices on eBay for vintage > > stuff have been dropping for the last 2-3 months, > > particularly w/r/t items after 1980? > > It makes sense, and is long overdue. I think a couple factors are at > play: > > a) many people have gotten their fill of vintage stuff > b) the economy has slowed, resulting in fewer instant internet > gazillionaires > > Less demand = lower prices > > Sellam International Man of > Intrigue and Danger > -------------------------------------------------------------- > ---------------- > Looking for a six in a pile of nines... > > VCF 4.0 is September 30-October 1 > San Jose Convention Center, San Jose, California > See http://www.vintage.org for details! > >

25 years, 11 months

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[Fwd: Re: TI Silent 700 terminal]

by dhquebbeman＠theestopinalgroup.com

> Cool, this is the one that has Bubble Memory storage so it is quite a > find, if I didn't have two already I'd be interested :-). Did you get a > manual with it? That is what I don't have and so only know about have > the commands for the thing. I have a bubble unit (these could hold up to > three) that I'd be willing to part with if you find a taker. It never ceases to amaze me; just when I thought I knew all the Silent 700 models, someone comes up with a variation I haven't seen. > Further, the TI printheads don't get "dirty" they get "broken" They are > thermal and thus limited in the number of characters they can print. Out > of a lot of 36 silent 700s I picked up (for $25!) only 9 had working > print heads and most of the others had had their print heads scavenged. > You can get "new" or "refurbished" replacement heads for about $90 on > the net though. My latest Silent700 is a Model 735 KSR. The carrier for the print head was broken, but repairable, as was the mechanism for adjusting the print head pressure against the paper. After making those repairs, I had print quality similar to what was shown in the last picture. However, some judicious adjustments cured that, and it now prints fine. Additionally, the TI Silent 700 Service Manual I have does describe a procedure for cleaning the print heads. IIRC, you take a sheet of plain, regular paper, soaked lightly in alcohol, and run it through the platen, then type on it. The alcohol may be a figment of my fatigued imagination; but the procedure isn't. -dq > > --Chuck > > Bill Bradford wrote: > > > > Anybody have any interest in a TI Silent 700 terminal? I just > > rescued one from a local shop. Even has about a third of a roll > > of thermal paper left, and appears to work fine (other than needing > > the printhead cleaned). Has clamp-on cover with handle, too. > > > > >From the back info plate: > > > > 765 PORTABLE MEMORY TERMINAL > > Part No. 099230-0001 > > Serial No. 0476617603 > > Volts 120 VAC > > Freq 47-63 Hz > > Amps 2.0A > > Watts 150W > > > > Inside the unit is a sticker that says it came from > > Data Access Systems, Inc. in Houston, with a warranty > > sticker, model/serial #, and an "80K. MEM KIT II" > > notation. > > > > I've got pictures of the unit up at http://www.decvax.org/ti/ > > > > I even found the original 1971 press release about the > > Model 725: > > > > http://www.ti.com/corp/docs/company/history/silent700.shtml > > > > If anybody is interested in this terminal, please let me know. > > I'd like to see it go to a good home, and the SO wont let > > me have anything else for a while (she's still getting used > > to the VAX 6000)... > > > > Bill > > > > -- > > +-------------------\ /-----------------+ > > | Bill Bradford | www.sunhelp.org | > > | mrbill(a)mrbill.net | www.decvax.org | > > | Austin, Texas USA | www.pdp11.org | > > +-------------------/ \-----------------+ >

25 years, 11 months

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Want to trade

by agraham＠ccat.co.uk

Yep, the AlphaBook 1, made by (I think) Tadpole and a snip at ukp10K! Personally I wanted a few of those just to cluster 'em together :o) They must get pretty warm since the whole case of the machine is the heatsink. a > -----Original Message----- > From: allisonp [mailto:allisonp@world.std.com] > Sent: 23 July 2000 17:07 > To: classiccmp(a)classiccmp.org > Subject: Re: Want to trade > > > Mike, > > >>>VAX VMS on a laptop maybe with DECwindows > > Ah, that would have to be alpha powered as there are no vax systems > I know of that made it to taptop status. > > > Allison > > > > -----Original Message----- > From: Mike <dogas(a)leading.net> > To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org> > Date: Sunday, July 23, 2000 11:15 AM > Subject: Want to trade > > > >I'd like to start trading gear to lighten the load and focus the ole > >collection. The list of stuff I'm looking for is at: > >http://users.leading.net/~dogas/wanted.html > > > >If ya have anything there and will trade it for something, > please let me > >know. > > > >Thanks > >- Mike: dogas(a)leading.net > > > > >

25 years, 11 months

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Some Finds

by agraham＠ccat.co.uk

Aren't Tano the company that repackaged the Dragon 64 in around '85? I know there's a broker somewhere on the west coast that's still selling unopened Tano 64s for around $35 but I haven't found anyone who has heard of them cheers a > -----Original Message----- > From: John R. Keys Jr. [mailto:jrkeys@concentric.net] > Sent: 21 July 2000 23:20 > To: classiccmp(a)classiccmp.org > Subject: Some Finds > > > Just a short list of some items added to the collection this week; > 1. HP 7980XC Tape unit with manual, rolling case with keys, > cables, and > mics items > 2. HP 2563A printer working and complete > 3. HP6000 SCSI SE minitower > 4. A rack mounted computer named Tano AVT2 the company is out of New > Orleans > 5. Supercharger by ARCADIA for the Atari > 6. NeXT OS 3.2 new in unopened box > 7. NeXT CD-rom drive manual ( now to find a Next CD-rom drive) > > That's it for now. Keep on computing > John Keys >

25 years, 11 months

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Want to trade

by dogas＠leading.net

From: allisonp <allisonp(a)world.std.com> >Mike, > >>>>VAX VMS on a laptop maybe with DECwindows > >Ah, that would have to be alpha powered as there are no vax systems >I know of that made it to taptop status. > > >Allison > Oh, well... I guess that would do. ;) - Mike

25 years, 11 months

2
1
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FW: Osborne Query

by kyrrin＠bluefeathertech.com

(Forwarded to CLASSICCMP, CC to original author). Can anyone on the list give this fellow some advice about his Osborne? As you all know, I'm much more of a DEC/Sun/HP/Unix person myself. Please reply directl to the author. Thanks! Forward follows. -=-=- <snip> -=-=- >Delivered-To: kyrrin(a)mail-sttl.uswest.net >Delivered-To: alias-bluefeathertech.com-kyrrin(a)bluefeathertech.com >Date: Sun, 23 Jul 2000 20:57:18 -0700 >From: "John Fox" <jfoxy(a)internetcds.com> >To: kyrrin(a)bluefeathertech.com >Reply-To: jfoxy(a)internetcds.com >X-Mailer: Mozilla 4.73 [en] (Win98; U) >X-Accept-Language: en >Subject: Osborne > >I want to determine the value of and perhaps sell my Osborne computer. >It is a tan case model 1. Do you know of any organizations that can >help me? > >Thanks for your help. > >John Fox > > > -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- 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..."

25 years, 11 months

1
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Want to trade

by dogas＠leading.net

I'd like to start trading gear to lighten the load and focus the ole collection. The list of stuff I'm looking for is at: http://users.leading.net/~dogas/wanted.html If ya have anything there and will trade it for something, please let me know. Thanks - Mike: dogas(a)leading.net

25 years, 11 months

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OT: Needed-Windows code review for emulator

by rcini＠optonline.net

Hello, all: My latest project is to add paper tape "input" and "output" to Claus Guiloi's Altair Emulator. For this project, I had to learn both C and Windows programming. I don't really know if I learned anything since I don't have it working yet. Anyway, what I'm looking for is a kind sole with Windows programming experience to review what I've done so far and to point out where I've gone wrong. The code could be considered "ugly" and doesn't compile cleanly, but looking at the errors and warnings, it's really not too bad considering at the beginning of the project, I knew nothing. If anyone has the time to do this, please contact me at my work address (mailto:rcini@congressfinancial.com) and I'll send a full copy of the source code and a roadmap of what mods were made and what's open. I peppered the source code with comments as I modified things, so it should be pretty easy to follow. Of course, once it's done, everyone can have a copy :-) Rich [ Rich Cini [ ClubWin!/CW1 [ MCP Windows 95/Windows Networking [ Collector of "classic" computers [ <http://highgate.comm.sfu.ca/~rcini/classiccmp/> <================ reply separator =================>

25 years, 11 months

1
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Scope use...

by bills＠adrenaline.com

I was going to post this request sometime, John Fousts post has inspired me to do it now. Anyway, I have also recently acquired an oscilloscope (Tektronix TDS 3012) and, while I have all the documentation and some notion of what an oscilloscope does, I really don't know how to bring it to bare against the several dead/flakey systems currently in my possession. I hope this message will start a "how to use an oscilloscope to diagnose vintage hardware problems" thread. Thanks, Bill (by the way... bills(a)adrenaline.com is now my email address)

25 years, 11 months

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[Fwd: Re: TI Silent 700 terminal]

by cmcmanis＠mcmanis.com

-------- Original Message -------- Subject: Re: TI Silent 700 terminal Date: Sun, 23 Jul 2000 16:34:42 -0700 From: Chuck McManis <cmcmanis(a)mcmanis.com> To: classiccmp(a)classiccmp.org References: <20000723135030.C23532(a)mrbill.net> Cool, this is the one that has Bubble Memory storage so it is quite a find, if I didn't have two already I'd be interested :-). Did you get a manual with it? That is what I don't have and so only know about have the commands for the thing. I have a bubble unit (these could hold up to three) that I'd be willing to part with if you find a taker. Further, the TI printheads don't get "dirty" they get "broken" They are thermal and thus limited in the number of characters they can print. Out of a lot of 36 silent 700s I picked up (for $25!) only 9 had working print heads and most of the others had had their print heads scavenged. You can get "new" or "refurbished" replacement heads for about $90 on the net though. --Chuck Bill Bradford wrote: > > Anybody have any interest in a TI Silent 700 terminal? I just > rescued one from a local shop. Even has about a third of a roll > of thermal paper left, and appears to work fine (other than needing > the printhead cleaned). Has clamp-on cover with handle, too. > > >From the back info plate: > > 765 PORTABLE MEMORY TERMINAL > Part No. 099230-0001 > Serial No. 0476617603 > Volts 120 VAC > Freq 47-63 Hz > Amps 2.0A > Watts 150W > > Inside the unit is a sticker that says it came from > Data Access Systems, Inc. in Houston, with a warranty > sticker, model/serial #, and an "80K. MEM KIT II" > notation. > > I've got pictures of the unit up at http://www.decvax.org/ti/ > > I even found the original 1971 press release about the > Model 725: > > http://www.ti.com/corp/docs/company/history/silent700.shtml > > If anybody is interested in this terminal, please let me know. > I'd like to see it go to a good home, and the SO wont let > me have anything else for a while (she's still getting used > to the VAX 6000)... > > Bill > > -- > +-------------------\ /-----------------+ > | Bill Bradford | www.sunhelp.org | > | mrbill(a)mrbill.net | www.decvax.org | > | Austin, Texas USA | www.pdp11.org | > +-------------------/ \-----------------+

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[Fwd: Re: Remote Services Console]

by cmcmanis＠mcmanis.com

-------- Original Message -------- Subject: Re: Remote Services Console Date: Sun, 23 Jul 2000 16:24:30 -0700 From: Chuck McManis <cmcmanis(a)mcmanis.com> To: maximum entropy <entropy(a)zippy.bernstein.com> CC: Classic Computer List <classiccmp(a)classiccmp.org> References: <200007231023.e6NANW820414(a)zippy.bernstein.com> I'd like to know as well since I have one to. I know they were used to allow DEC to dial in and diagnose your system from the home office. Things that I do know: Baud M = Baud for the Modem Baud T = Baudrate for Terminal Baud T has to match your console baud rate (its a binary number between 0 and 7 I believe) If local copy is set then I'm guessing the console terminal sees everything the modem does. I believe the center DB25 on the back goes to the VAX. I haven't figured out the others yet. --Chuck maximum entropy wrote: > > I recently rescued from the scrap heap a "DIGITAL Remote Services > Console" box that was previously connected to a VAX. > > The front panel has a key switch with 4 positions ("Remote", "Lock > Out", "User Port", and "Remote User"). There is a push button > labelled "Local Copy". There are two groups of three push buttons, > one group labelled "Baud T", and the other labelled "Baud M". > > On the back it has 4 DB-25 ports: 2 female ("A1" and "B1") and 2 male > ("A2" and "B2"). > > On the bottom of the unit it says "Model MDS01". It also says > "Property of Digital Field Service. Not for sale." So I guess it's a > good thing I didn't pay any money for it :-) > > I'd appreciate any information at all about this device. What is it, > how do I use it, and is it specific to VMS or would it be useful for > anything on a NetBSD/vax system? > > Feel free to respond to me directly if you feel this is too far > off-topic for this mailing list. > > TIA, > entropy > > -- > entropy -- it's not just a good idea, it's the second law.

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Back! I'm back...

by allisonp＠world.std.com

> * Pigeons can indeed do "The Splits." It's their evasive maneuver for falcons... sometimes it works. > I seem to have developed a taste for collecting serial data analyzers. I >now have two from ARC (Interview 4600 and 7500), and a pair from DigiLog. I >wonder what else is out there? > > On that note, does anyone have any documentation at all on either of the >Atlantic Research units? I've not had a lot of success finding such. AR is one of the long timers in the business. I happento have a Tbar Explorer, also looking for data, books whatever. >I'll mention it anyway: A Cushman CE-6A service monitor, working >electrically but only fair cosmetically, for $425. For those of you who >know service monitors, this was still quite a deal (and for those that >don't, you can E-mail me and I'd be happy to explain). ;) lampkin, Cusman and Singer Gersh names I know well. Still wish I had my FM10-C... Allison

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TI Silent 700 terminal

by mbg＠world.std.com

I'm interested... Megan

25 years, 11 months

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looking for DEC 72" rack with sides

by uban＠ubanproductions.com

Hello, I am looking for a set of sides for a DEC 72" (PDP 11/45 vintage) rack, or the whole rack with sides, if that is easier. I am located in N. W. Indiana (near Chicago) and would prefer something within a few hour drive of this area. Please resond to: uban(a)ubanproductions.com --tnx --tom

25 years, 11 months

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TI Silent 700 terminal

by mrbill＠mrbill.net

Anybody have any interest in a TI Silent 700 terminal? I just rescued one from a local shop. Even has about a third of a roll of thermal paper left, and appears to work fine (other than needing the printhead cleaned). Has clamp-on cover with handle, too. >From the back info plate: 765 PORTABLE MEMORY TERMINAL Part No. 099230-0001 Serial No. 0476617603 Volts 120 VAC Freq 47-63 Hz Amps 2.0A Watts 150W Inside the unit is a sticker that says it came from Data Access Systems, Inc. in Houston, with a warranty sticker, model/serial #, and an "80K. MEM KIT II" notation. I've got pictures of the unit up at http://www.decvax.org/ti/ I even found the original 1971 press release about the Model 725: http://www.ti.com/corp/docs/company/history/silent700.shtml If anybody is interested in this terminal, please let me know. I'd like to see it go to a good home, and the SO wont let me have anything else for a while (she's still getting used to the VAX 6000)... Bill -- +-------------------\ /-----------------+ | Bill Bradford | www.sunhelp.org | | mrbill(a)mrbill.net | www.decvax.org | | Austin, Texas USA | www.pdp11.org | +-------------------/ \-----------------+

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Back! I'm back...

by kyrrin＠bluefeathertech.com

Hi, folks. Yes, it's me. Finally felt comfortable enough to just settle down and resubscribe. Scrounge-2000 was quite a trip. I learned a number of things along the way, including (though not limited to): * If you're driving from the Bay Area to Washington, and you want to buy giant blackberries from the local berry farms to take home, also invest in a Peltier-effect portable cooler box. * Don't ever rent a Ford Explorer for a long trip again. The things are utter gas hogs! * Pigeons can indeed do "The Splits." Now, as to what I got... Test equipment and RF-related stuff was my main emphasis on this trip, and I did succeed pretty significantly in that regard. Two Wavetek function generators (a 154 and a 178), and a rubidium frequency standard from Tracor (anyone have the manual for a 308A?). I didn't do badly in the (classic) computing department either. I snarfed a pair of Micropolis full-height nine-gig drives at $5/each, an Atlantic Research 'Interview 7500' datascope for $45, and some non-classic replacement parts for my main workstation. I seem to have developed a taste for collecting serial data analyzers. I now have two from ARC (Interview 4600 and 7500), and a pair from DigiLog. I wonder what else is out there? On that note, does anyone have any documentation at all on either of the Atlantic Research units? I've not had a lot of success finding such. The crown jewel of this trip has more to do with radio than computers, but I'll mention it anyway: A Cushman CE-6A service monitor, working electrically but only fair cosmetically, for $425. For those of you who know service monitors, this was still quite a deal (and for those that don't, you can E-mail me and I'd be happy to explain). The only thing I really needed to do with it was rebuild a kludge some other tech had designed in to replace the (formerly) 5 MHz OCXO with a 10 MHz version. Said tech had used an ancient 74H101 as a divider, and had simply stuck the chip in with double-sided foam tape and not taken advantage of the original octal socket at all. I corrected all the above, and I'm pleased to say it works just fine. So, what have I missed? Flame wars? Discovery of a PDP-1? Anything? ;-) -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- 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..."

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Archives

by mann＠pa.dec.com

I used to read this mailing list from the archives instead of joining it, but I lost track of it when Kevan Heydon's archive went away earlier this year, and I didn't find a new place to read it until yesterday. Now I've actually joined the list so that doesn't happen again. If the folks who maintain the present archives are reading this, I'd like to point out two problems: - The archive on www.classiccmp.org is extremely incomplete. If no one has time to fix it, perhaps you could put in a link to the much better archive at www.retrobytes.org/classiccmp - The archive at www.retrobytes.org/classiccmp has a minor problem: it doesn't know what month it is. All the messages posted since April are archived under April 2000, including those posted in May, June, and July 2000. Tim Mann tim.mann(a)compaq.com http://www.tim-mann.org Compaq Computer Corporation, Systems Research Center, Palo Alto, CA

25 years, 11 months

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Inappropriately sticky DC100 tapes

by fmc＠reanimators.org

Once again I have some HP 85 tapes, which are basically 3M DC100 cartridges. These have the interesting property that, left to sit for the better part of a decade, when the tape is first spun the oxide ends up stuck to the tensioner loop inside of the cartridge, leaving a clear spot on the tape. Which is bad as the drives use optical sensors to find BOT/EOT perforations in the tape, not to mention the fact that your Important Data is now missing some bits as they are stuck to the tensioner loop which doesn't get to touch the head. Suppose I'm willing to take extreme measures with a tape that I think has not been spun in a while, like disassembling and reassembling the cartridge. (As you might imagine from my description above, I have some cartridges which are sacrificable for parts.) Anybody got any good ideas for removing and replacing the tensioner loop without removing the oxide from the tape? -Frank McConnell

25 years, 11 months

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Scope use...

by allisonp＠world.std.com

>OTOH I can't think of much I would attempt to prototype without a decent scope. Back when... My scope was a Heath 15mhz and the #@&*Q#!!! thing had a propensity for frying the HV, usually when I needed it. (this is 1974ish). Ended up troubleshooting the entire altair when first built with a VOM and a logic probe and a few of the lighted pin logic clips (very handy still!). Finally got the HV caps needed (some serious ones!) to fix it right to shoot the flaky ram and frontpannel oneshots (timing). Right after that I got the NLS MS15, a Tek 516 and sold the Heath. Actually for most times I need a scope it's either enough (near overkill) that the B&K2120 20mhz dual trace does it well or I need a real killer >200mhz DSO, very rarely inbetween. I still use the NLS MS15, it's still in good shape and is fine for things where portable is handy. What I do have in quantity is multimeters both analog and digital. I find that each has it's attribute. For example the RS first design DMM, the only one for it's class with current ranges! You pay a bomb for a good DMM with current ranges or they only go to a few hundred mA with It's a must for proto work that will be portable. Allison

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OT: Looking for a couple of modern things . . .

by cfandt＠netsync.net

Hi everybody, Briefly, I'm requesting two things here although they're less than 10 yrs old. This is a good venue, I think, to initiate private replies to these requests. 1.) I've recent got several ASANTE' networking parts. I'm requesting a copy of any documents or other info on these. Their website has no docs for these apparently obsolete products, naturally. They are: a.) A couple of FriendlyNET adaptor pods: They are small palstic boxes (~2" x 3") with an RJ-45 receptacle on one end and a 1 meter cable with a 14 pin micro-D connector at the end. Looks like the micro-D (my term for it) evidently plugs into a port on a laptop or other such small computing appliance. b.) A 10T HUB/8 8-port hub. Yes, there's an 8-port hub on their website as an existing product but mine is an older unit with a BNC and AUI port connector in addition to the 8 RJ-45's and an RJ-45 OUT port. No other identifying marks except for a s/n: 630D0995. 2.) Anybody have a distribution of AutoCAD LT for Windows 95 FS? I'm looking for a transferable copy (license-wise transferable). This could be either a new old stock (NOS) copy from a store's back shelves or one that somebody tried out and didn't want to use and can pass on the whole license, box, docs, CD, etc. I'm trying to be a little economic and save some hard-to-find money by getting a used/obsolete version. Reply off list of course. Thanks for your help. Regards, Chris -- -- Christian Fandt, Electronic/Electrical Historian Jamestown, NY USA cfandt(a)netsync.net Member of Antique Wireless Association URL: http://www.antiquewireless.org/

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Want to trade

by allisonp＠world.std.com

Mike, >>>VAX VMS on a laptop maybe with DECwindows Ah, that would have to be alpha powered as there are no vax systems I know of that made it to taptop status. Allison -----Original Message----- From: Mike <dogas(a)leading.net> To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org> Date: Sunday, July 23, 2000 11:15 AM Subject: Want to trade >I'd like to start trading gear to lighten the load and focus the ole >collection. The list of stuff I'm looking for is at: >http://users.leading.net/~dogas/wanted.html > >If ya have anything there and will trade it for something, please let me >know. > >Thanks >- Mike: dogas(a)leading.net > >

25 years, 11 months

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Rack mount for ISA bus

by rmeenaks＠olf.com

Hi, I am looking for a rack mount for ISA-based cards.? Anyone know where I can pick one up.... Ram

25 years, 11 months

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What is it?

by cmcmanis＠mcmanis.com

There is some sort of VAX on E-bay that I've never seen before. I'm wondering if it is something without the skins or one I never heard of. The URL is <http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=388134861> It looks like it has several S-box type chassis at least three tape drives etc. All for the low low price of $1000 :-) --Chuck

25 years, 11 months

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RSTS/E BASIC Plus tapes to read

by jfoust＠threedee.com

In a delightful coincidence today, I picked up a stack of a half-dozen nine-tracks for $1. Their labels indicate they belonged to my former boss at a department at the UW-Madison, and one was even labelled with the name of a series of BASIC programs I worked on circa 1983, even though the tapes are dated 1986. It's labelled "DOS format 1600 bpi 9tr formatted ASCII 256 b/record". It's a Memorex 6250 bpi tape. I'd love to dump the files to contemporary media. I have no idea what sort of compensation would be appropriate. For starters, I'd be glad to give five of the six. Oh, I know, nine-track tapes are $1 per Dumpster. How about a few dozen organic farm eggs from Wisconsin chickens? OK, maybe cash. - John

25 years, 11 months

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Un-wirewrapping (and re-wirewrapping) a PDP-16

by Anthony.Eros＠compaq.com

Well, I recentlly brought home my new (to me) PDP-16 and I can't wait to start building projects with it. First though, I need to unwire the existing configuration. I'm documenting it, with an eye towards some time understanding the original purpose of this unit. Does anyone have any suggestions or pointers for tools and techniques for un-wirewrapping and subsequently wrapping new projects? -- Tony

25 years, 11 months

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Scope use...

by allisonp＠world.std.com

From: Dwight Elvey <elvey(a)hal.com> > I tend to disagree. The order of useful tools I use are >oscilloscope, analog meter and DMM. I use the oscilloscope >as a logic probe. It has a nice little light that tells me Ok that is a hybrid machine, still your using the logic probe function as the leader. I have scope handy and use them hard too. However, 30+ years of troubleshooting (some of them for profit) and teaching it I hold the scope for last save for analog and even then I've done other things first. I'd suggest that learing how to use more basic tools fully and understand them completely before a scope is not a bad thing. Allison

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Other useful test equipment (was: RE: Scope use...)

by CordaAJ＠nswc.navy.mil

Another useful piece of equipment is a multi-channel logic analyzer. Most of these units can read out pulse-timing directly, and will provide an invaluable way to display TTL signal patterns and relationships. Now, before anyone flames me, I will admit that new versions of these can cost multiple thousands of dollars, but I've noticed that a significant number of older units are showing up at hamfests for << $200. (I ran across a Tek. DAS analyzer at the Trenton Computerfest for <$25.00) These older units are becoming useless for new and/or cutting-edge hardware development, and are being dumped by a number of hardware development firms, since most of them can't sample systems with clocks > ~10-20 Mhz reliably, but for the kind of antique-system tinkering most of us do, these can be quite a help! The one thing you should look out for when buying one is to make _certain_ it comes with a set of test pods/cables/probes. A podset can be impossible to locate after the fact, and may cost you a horrendous amount of cash if you try to order them from the original manufacturer. Also, I suggest that you stick to analyzers made by larger companies such as HP and Textronix. You'll have better luck finding docs and getting help >from other hobbyists that way. -al- -acorda(a)1bigred.com > -----Original Message----- > From: allisonp(a)world.std.com [mailto:allisonp@world.std.com] > Sent: Friday, July 21, 2000 1:17 PM > To: classiccmp(a)classiccmp.org > Subject: Re: Scope use... > > > hi, > > think of an oscope as a graphic voltmeter that plota against time. > the X axis is volts and Y axis is time. > > That is along way from troubleshooting with one. To trouble > shoot with one > you really need to have some idea of waht you can expect to > see vs what > you actually saw. Most prints do not automatically give you that. > > While a scope is handy, for fixing machines that were > formerly working a > DMM and logic probe tend to be more useful. Exceptions exist > like setting > hammer flight time on charaband printers or slice levels and > timing for > older core stacks. The latter being adjustments rather than > fixed by rules > of logic. > > > Allison > > > On Fri, 21 Jul 2000, Bill Sudbrink wrote: > > > I was going to post this request sometime, John Fousts > > post has inspired me to do it now. Anyway, I have also > > recently acquired an oscilloscope (Tektronix TDS 3012) > > and, while I have all the documentation and some notion > > of what an oscilloscope does, I really don't know how to > > bring it to bare against the several dead/flakey systems > > currently in my possession. I hope this message will > > start a "how to use an oscilloscope to diagnose vintage > > hardware problems" thread. > > > > Thanks, > > Bill > > (by the way... bills(a)adrenaline.com is now my email address) > > >

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Curta I or II calculator wanted

by Anthony.Eros＠compaq.com

I've just read a little about this calculator that was popular with road rally enthusiasts and would really like to find one. Is anyone interested in trading a Curta for, say a Teletype ASR-33 with schematics and maintenance docs or a Celestron C8 SCT? -- Tony

25 years, 11 months

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Apple Johnathon & Apple Macintosh II: Seperated at birth?

by owad＠applefritter.com

>I have read something at applefritter that intrigued me: that Apple was >thinking about marketing a system known as the "Johnathon" (Successor the >the Mac, perhaps?). The basic design was very similar to that of an Acorn >RISC PC: You bought the base "module" (What OS that run? Mac OS?) as it was >called, & you could buy additional modules that would allow you to run other >operating systems. Unfortunately, Apple canned this computer because they >thought that everybody would just buy the MS-DOS module. > >My question is: Was this the original concept for the Mac II, or is this >something completely diffrent. No. Johnathan and the Mac II were in fact competing projects. The book AppleDesign has some beautiful pictures of the system as well as a nice overview: http://www.amazon.com/exec/obidos/ASIN/1888001259/theapplefritter Tom ------------------------------Applefritter------------------------------ Apple Prototypes, Clones, & Hacks - The obscure, unusual, & exceptional. ---------------------<http://www.applefritter.com/>---------------------

25 years, 11 months

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Apple Johnathon & Apple Macintosh II: Seperated at birth?

by owad＠applefritter.com

>I have in my posession one of the few real Mac Clones....It's called >the Jonathan by Akkord Computer out of Taiwan. It's a real clone with >the exception of the Mac ROMs, the hardware was all original and supposed >to get around a lot of the Apple patents. It's a neat little machine, I >met the Akkord guys back in 1990-91. I'm reading the archives, so I can't see your email address, but would you like to provide some pictures for Applefritter? A response off list is fine. Thanks, Tom Owad ------------------------------Applefritter------------------------------ Apple Prototypes, Clones, & Hacks - The obscure, unusual, & exceptional. ---------------------<http://www.applefritter.com/>---------------------

25 years, 11 months

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xtrs 4.3, a TRS-80 emulator for Unix and X

by mann＠pa.dec.com

[Please email me if you feel this announcement is not appropriate for the classiccmp mailing list.] You can now get xtrs version 4.3, a Radio Shack TRS-80 Model I/III/4/4P emulator for Unix and the X Window System, from my TRS-80 Web pages: http://www.tim-mann.org/xtrs.html Version 4.3 adds emulation of the serial port (connecting to a Unix tty device), and of both Radio Shack and Micro Labs hi-res graphics cards for the Model III. There are also several small bug fixes. See the included ChangeLog for details. Thanks to the folks who sent me information on Model III graphics cards in response to my request in the xtrs 4.2 announcement! Now I have another request: can anyone send me specs for TRS-80 joysticks? General xtrs blurb: xtrs is a Radio Shack TRS-80 Model I/III/4/4P emulator for Unix and the X Window System. It includes lower case, the real time clock, hi-res graphics, serial port, parallel printer, mouse, cassette, sound and music output (requires OSS), 5" and 8" floppy disk drives in single and double density, and even hard disk drives. The emulated floppy and hard disk file formats are compatible with the popular MSDOS-based emulators by Jeff Vavasour, Matthew Reed, and David Keil, and (if you choose a capable enough file format), all features of the original TRS-80 floppy disk controller are emulated. Under Linux, physical floppy disk drives are also supported. Physical cassettes can be read and written too. The user interface is a bit spartan, but it gets the job done. Tim Mann tim.mann(a)compaq.com http://www.tim-mann.org Compaq Computer Corporation, Systems Research Center, Palo Alto, CA

25 years, 11 months

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