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

FSOT: IBM 4869 external 5 1/4" floppy drive

by SUPRDAVE＠aol.com

if the drive bezel has a * on it, it's a 360k. if no * is on the faceplate it will be a 1.2 model. it's easy to change the drive anyway, i installed a 1.2 drive in the 4869 enclosure. In a message dated 98-12-01 18:40:40 EST, you write: << The title says it all. External floppy drive made by IBM. Excellent condition. It has the standard DB-37 connector. I think it's a 1.2Mb model but I'm not sure. Guaranteed against DOA. >>

27 years, 7 months

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RSTS & the BRA81FH

by DSEAGRAV＠toad.xkl.com

Remember when I dropped my 11/44 off a cart? The RA81 dropped from about 2', and had crap (As in the other two BA-11) land on it. On later reassebling the system in another room, it no logger booted. I assumed I'd finally killed the RA81 (After also dropping it on Jeff's toes, and spinning it up with the brakes on!) and let it sit. Well, this morning, I got bored, and went back to playing with the 11. Thought maybe I could talk it into doing something from the console. Found out I'd had the SDI cable in the UDA50 backwards. Oops. Spin RA81 up, say B DU0... RSTS loads. THe drive is still alive. Throwing a few seek errors, but still readable. The Bastard RA81 From Hell Lives Again. I'm going to attempt backing it up to tape tomorrow. Think this would jinx it? -------

27 years, 7 months

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PET Composite Video

by foxnhare＠goldrush.com

> From: Philip.Belben(a)pgen.com > Subject: Re: PET Video (was: Replacing 6550s) & 128 > > Foxnhare (who are you anyway? I've seen the address before. You're not > Larry Anderson by any chance are you? :-) ) wrote: Yep, the login was my wife's idea... Fox: an old definition for my middle name, Todd, and Hare: for her last name. > >> From: Doug Spence <ds_spenc(a)alcor.concordia.ca> > >> Subject: Re: Replacing 6550s > > > >> (I especially find it cool that they list various part numbers for the > >> connector. :) ) > > > > Digikey is the best source for inexpensive PET compatible connectors. > > (1-800-DIGI-KEY) along with a ton of other cool parts. > Many thanks for that. I know where to turn next time I'm looking... I think the last batch of 12/24 PCB connectors from them cost me about $18 (for 10). Very reasonable! [snip!] > I thought the video signals were there on later machines too, but I can > well believe it might not work on the 12 inch screen models. I would think you could get a multi-sync to do it, but the way the screen behaves I think the fat-forty and 80000 series were able to change sync rates. (Of course what do I know I'm just mainly a software guy). > My experience is that Nick Hampshire's circuit doesn't work at all. Using > the same two chips, 4011 and 4066, the correct procedure (sorry. The > procedure that worked when I tried it) is to combine the two syncs with the > 4011, invert (I think - not sure about this one) with another 4011 gate, > and use that to gate the video using the 4066. Works a treat. They tried > it at school, too (don't know what circuit tho'), and got a grey background > for the white text. I imagine a series capacitor might help, but I've not > tried it. Could ya like draw it out or something... I would really like to have a composite output on the PET (ohh could do WWW quick-time animated movies of such classics as Drameda! or Dance! - PET character animated shorts) 100k of video for a 5K program animation :) Actually would be better to screen capture it off of an emulator and then you can compress it way down to say 60 k or less.. > From: ard(a)p850ug1.demon.co.uk (Tony Duell) > Subject: Re: PET Video (was: Replacing 6550s) & 128 > > [Composite video adapter] > > > My experience is that Nick Hampshire's circuit doesn't work at all. Using > > the same two chips, 4011 and 4066, the correct procedure (sorry. The > > I've never tried that one. I've used modifications of the TRS-80 Model 1 > circuit and the BBC micro circuit with no problems at all. The latter is > simpler, so I'll describe that. But the output has a little DC offset > that some (a _very_ few) monitors object to. > > Start by Xoring HSync and VSync to get a CSync signal. I normally use a > 74LS86 for this. But the XOR-from-4-NANDs using a 74LS00 once got me out > of a hole when I couldn't find any '86s. Invert CSync to give Csync/ > using either another section of the '86 or a suitable TTL inverter. > Alternatively make an XNOR gate from 4 NORs. > > You now combine video and CSync/ using this circuit Or the complete circuit of this? I would really like to get a composite circuit for the PET FAQ on-line One could concevably make a portable PET (yeah, the PET is kinda portable, but not as much as an SX 64 or 128D) if such a circuit was available. ;>

27 years, 7 months

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HP3000 help needed

by rigdonj＠intellistar.net

Aaron, At 07:05 PM 11/27/98 -0800, you wrote: > >9144 tape drive - I've already deduced that it's a low-density, 16-track >capable of 67/134 megs and the tapes have to be purchased pre-formatted. Not only pre formatted but preformatted by HP. ****NO*** others will work. > >2563A Printer - with a modular connector. > >9123 3 1/2" dual floppy - picked up after-the-fact at a yard sale. It's >HP-IB, but has a weird DIN power connector cord. No P/S. This drive is a double sided 3.5" HP-IB drive. It's exactly the same as the 9122 EXCEPT that it does no t have a power supply. It was sold only for the HP 150 Touch Screen II and the TS II supplies +5v and +12V power to it via the DIN plug. I have used old PC power supplies to operate them. I can dig up the pinout if you need it. Joe

27 years, 7 months

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Any collectors in Minneapolis?

by ddameron＠earthlink.net

Hi Doug and all, At 03:10 AM 12/2/98 -0600, you wrote: >I constantly drool over stuff that's in the Charles Babbage Institute's >archives, but I don't get to Minneapolis very often (OK, I *never* get to >Minneapolis). > I found by willing to be helpful with them, they were willing to copy and send some material for me. I sent them some material they wanted, and they sent me some issues of "The Computer Hobbyist" in return. Of course this isn't the same thing as going there and discovering the material first hand! -Dave

27 years, 7 months

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HP Laserjet Series II

by fmc＠reanimators.org

John Amirault <amirault(a)epix.net> wrote: > How old are the machines? When is the last time they were CLEANED? I am no > genius but the idea of CLEANING the rollers is, to me, a good one. Hope this > suggustion helps you. Cleaning helps -- if the rollers have picked up dirt it will make it harder for them to pick up paper. But the fundamental problem is that rubber ages and gets hard. Once upon a time (mid-1980s) some of the HP CEs used to carry an aromatic fluid they called "Fedron" which was good for restoring the gumminess of hard rubber rollers. I saw them use it on 2601 (Diablo 630) platen rollers and the little roller in the 2619 chain printer (a Dataproducts something) that drives one of the paper-jam detectors (roller not turning => paper not moving => paper jam, and when this one got hard enough that the paper just slid over it without turning it you got one frustrated computer operator). Is this stuff still available, or did it get banned because it's bad for the ozone layer? Not sure it would work for LJ II pickup rollers, they're a softer rubber. Nor am I sure what the fluid did, for all I know it stripped off a layer of the rubber. -Frank McConnell

27 years, 7 months

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Now VERY *OT* (hit delete now): RE: networking newbie

by cswiger＠wilma.widomaker.com

>> The management is not married to DOS/WIN/NT as a >> "they are great" but rather it does the job for >> the scale of business they are and within >My friend is running Linux on his home PC, but if >you didn't know any better (and if you didn't look >close enough) you'd swear he was running Windows 95. >The fact is that his desktop might as well BE Win95, What's nice is being paid to support a win shop but the mgmt lets you use a pc *nix for sysadmin, use samba, put a telnetd on NT, etc. Your friend must be using fvwm95 - I just got StarOffice last night, all 70Mb of it. For topical material - I'd love to find a Xenix or SCO unix box o' 5 1/4" disks and manuals to run on a 386 - used to see 'em for sale cheap at hamfests. Chuck cswiger(a)widomaker.com

27 years, 7 months

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Any collectors in Minneapolis?

by fauradon＠pclink.com

Yes there are collectors in Minniapple. You know, I've never had the chance to go to the Chuck Babe institute. But I can tell you one thing when it Snows here We stay home. (besides we're having temperature in the mid 50's these days) I have a pretty busy schedule but I could arrange a trip. Francois ------------------------------------------------------------- Visit the desperately in need of update Sanctuary at: http://www.pclink.com/fauradon/ >I constantly drool over stuff that's in the Charles Babbage Institute's >archives, but I don't get to Minneapolis very often (OK, I *never* get to >Minneapolis). > >Are there any Minneapolitans (?) out there willing to copy a few goodies >from their archives? I'd pay for copying, shipping, gas, and probably a >coupla bucks more. There's enough interesting stuff there that I'm sure a >small business could be established by selling reprints to collectors and >historians (besides, what else are you going to do when it's snowing >out?). > >-- Doug >

27 years, 7 months

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Now VERY *OT* (hit delete now): RE: networking newbie

by JRichardson＠softwright.co.uk

>> NT - about a day to get set up and working (or not at all in this >> case!). Needs lots of hardware. Costs lots. > >And I'm not paying for any of it, so who gives a rat's ass if some >corporate blow-hard has his head so far in his rectum that he >wants to run NT. That's the whole problem though. It's not a personal dislike of NT that annoys me, it's the fact that all this comes down on the end user - the users of the systems/software that we produce, not necessarily our direct customers - and forces them to use a shoddy system that's not up to spec and costs a lot more that it has to. NT's good for some things, especially on the client, (although even then I'm from the camp that says that if a client-side app can't be done in Java running within a browser then it isn't worth doing, so 200MB of NT overhead kinda kills my argument!) but it's the fact that *most* people have a "stick with what you know" policy (which is usually Win95 or NT, but could be a UNIX system) that really gets to me, especially when presented with hard figures to prove them wrong. I get frustrated delivering solutions to end users when I know that there is a better, cheaper and faster way (and yes, that is taking into account things like support/maintenance costs), but don't have enough clout within a company to say what systems to use and can only make recommendations which I know will be ignored. (phew.... deep breath! :*) it can be a very, very crazy world... cheers Jules >

27 years, 7 months

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FSOT: IBM 4869 external 5 1/4" floppy drive

by roblwill＠usaor.net

But, if you put a 1.2MB drive in it the case, it won't work with a PC or XT. I tried it, and it just gives the same old "general failure" errors. -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1> -----Original Message----- From: SUPRDAVE(a)aol.com <SUPRDAVE(a)aol.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Tuesday, December 01, 1998 7:57 PM Subject: Re: FSOT: IBM 4869 external 5 1/4" floppy drive >if the drive bezel has a * on it, it's a 360k. if no * is on the >faceplate it will be a 1.2 model. it's easy to change the drive anyway, i >installed a 1.2 drive in the 4869 enclosure. > > >In a message dated 98-12-01 18:40:40 EST, you write: > ><< The title says it all. External floppy drive made by IBM. Excellent > condition. It has the standard DB-37 connector. I think it's a 1.2Mb model > but I'm not sure. Guaranteed against DOA. > >> >

27 years, 7 months

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Now VERY *OT* (hit delete now): RE: networking newbie

by allisonp＠world.std.com

< > NT - about a day to get set up and working (or not at all in this < > case!). Needs lots of hardware. Costs lots. My $0.02. I just took a job where win95 and win/NT are it. I'm sure they could be migrated to linux BUT, I'm paid (well!!) to maintain and move their systems forward both hardware and software wise. Personally MS stuff stinks, I'm not paid for that opinion. I'm paid to provide my peice in helping to keep the business in the black. The management is not married to DOS/WIN/NT as a "they are great" but rather it does the job for the scale of business they are and within costs. The user base however could never work with linux(unix). Oh, Bif4win is garbage!!!! Allison

27 years, 7 months

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FSOT: IBM 4869 external 5 1/4" floppy drive

by roblwill＠usaor.net

Sort of off the topic of the drives for sale, but on the topic of an external IBM disk drive. I have the cable from a 4869 drive connected to a full-height drive (IBM), which is connected to a 4869 P/S on my IBM PC. However, it doesn't look so good. I was wondering if anyone had an old TRS-80 disk box (mod. 1 style) that they'd be willing to part with for a few bucks. The drive itself doesn't need to work. All I really need is the box and the P/S for it, so I have something to house my external drive "B" in. ThAnX, -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1> -----Original Message----- From: Joe <rigdonj(a)intellistar.net> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Tuesday, December 01, 1998 3:39 PM Subject: FSOT: IBM 4869 external 5 1/4" floppy drive >The title says it all. External floppy drive made by IBM. Excellent >condition. It has the standard DB-37 connector. I think it's a 1.2Mb model >but I'm not sure. Guaranteed against DOA. > > Joe > >

27 years, 7 months

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FW: MicroVAX 3100 -- complete system! -- available

by kyrrin＠bluefeathertech.com

Found on Usenet. This sounds like a great opportunity for someone who wants a MicroVAXen to get started. I already E-mailed to the guy that I guesstimated the system value at between $50 and $75. Please contact him directly if you're interested. Attachment follows. -=-=- <snip> -=-=- >>From: Scott Hale <Shale(a)cncdsl.com> >>Newsgroups: comp.sys.dec,comp.sys.dec.micro >>Subject: Microvax 3100 available >>Date: 01 Dec 1998 10:54:09 PST >>Organization: Sherman Clay & Co >>Lines: 22 >>Message-ID: <36643B50.2A88236D(a)cncdsl.com> >>Reply-To: Shale(a)sclay.com >>NNTP-Posting-Host: 209.31.3.16 >>Mime-Version: 1.0 >>Content-Type: text/plain; charset=us-ascii >>Content-Transfer-Encoding: 7bit >>X-Mailer: Mozilla 4.5 [en] (Win98; I) >>X-Accept-Language: en >>Path: blushng.jps.net!news.eli.net!spamkiller1.cwix.com!newsfeed.cwix.com!128.32.206.55!newsfeed.berkeley.edu!news.stanford.edu!newsfeed.concentric.net!207.155.183.80.MISMATCH!global-news-master >>Xref: blushng.jps.net comp.sys.dec:4904 comp.sys.dec.micro:657 >> >>Through a company acq we have acquired the below system: >> >>Microvax 3100/20-20RZ=tk5 >>OS: vms 5.5 >>32mb memory >>4 internal HD (500mb, 400mb, 100mb, 100mb) >>External TK50 tape unit >>VMS licenses included >> >>We gone through a few VAX resellers with no luck. Is there any value to >>the above system or is it complete junk? >> >>Anybody interested in buying, pls contact me. >> >>thanks! >> >>Scott Hale >>PC/LAN Manager >>Sherman Clay & Co >>Shale(a)sclay.com >> -=-=-=-=-=-=-=-=- 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..."

27 years, 7 months

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Recent Finds & Thoughts

by pete＠dunnington.u-net.com

On Dec 1, 15:19, Cameron Kaiser wrote: > The question is, does source => Dolby encoding => Dolby decoding == source? > Dolby encoding, AFAIK, increases the volume of sounds >10KHz, and decoding > does the reverse. There are three Dolby systems, all based on audio companders. Dolby A (the "professional" one, used by some recording studios for master tapes) works by splitting the audio into a number of frequency bands (like a graphic equaliser does). On recording, each band is then fed through a compressor to reduce the dynamic range, thus keeping the volume level fairly high. On playback, it's fed through an expander to recreate the dynamic range of the original signal. Dolby B is a simpler version, with a single filter for HF; it uses a similar compander for the upper frequencies only. Dolby C is a n "improved" Dolby B, which (IIRC) uses a different corner frequency and different compander. None of them use any form of frequency shifting. The reason Dolby B and C work so well (for tape, which is what they were designed for) is that tape hiss is largely made up of HF noise. You don't hear the hiss if the signal is at a sufficiently greater level than the hiss (which is more-or-less constant) -- in other words, if the signal-to-noise ratio is high enough. So Dolby B/C boost the level of quiet sections of the high frequency signal before recording, but leave the louder passages as-is, to avoid saturation. On playback, the amplitude of the quieter passages is attenuated again, and the hiss is attenuated with it. > However, that doesn't mean that there won't be subtle > differences between one particular encoder and a particular decoder's > respective frequency responses, so you can't be sure they'll be precisely > the same. Your ear won't care, but I bet the computer might. Unlikely to make much difference, unless the filter corner frequencies and rolloffs were quite different, which Dolby Labs were quite picky about before granting licences. > I came up with, during my days when I was too cheap/poor to spring for prefab > audio equipment, a superamplification system that was Dolby compatible. I'm > not saying that *that* was how Dolby worked (in fact, I'm sure it isn't), but > on the treble section of the sound, which is where Dolby NR operates, it was > pretty #$%&ing destructive. I wouldn't risk it. Then it wasn't Dolby-compatible :-) -- Pete Peter Turnbull Dept. of Computer Science University of York

27 years, 7 months

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Help! Need service info for HP 9835

by rigdonj＠intellistar.net

I finally tore into my "new" HP 9835. I found something on the power supply card as completely burned away. All the output voltages are present but low. It would save a lot time if some would sell or loan me a service manual for this old beast. Thanks, Joe

27 years, 7 months

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Recent Finds & Thoughts

by pete＠dunnington.u-net.com

On Dec 1, 18:55, Tony Duell wrote: > Well, if audio processing that leaves the signal going to the output > socket unchanged (like recording with Dolby, playback with Dolby) still > allows the copy to load, then I think audio recording onto a CD would > work. In fact I can't think of a good reason why it wouldn't work, based > on my understanding of the CD system. There was an article in one of the Acorn newgroups the other day, from someone who had done exactly that for hundreds of his old computer tapes, and was extolling the virtues of being able to find things, having reliable reproduction, etc. He made no mention of any special signal processing. -- Pete Peter Turnbull Dept. of Computer Science University of York

27 years, 7 months

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FSOT: IBM 4869 external 5 1/4" floppy drive

by rigdonj＠intellistar.net

The title says it all. External floppy drive made by IBM. Excellent condition. It has the standard DB-37 connector. I think it's a 1.2Mb model but I'm not sure. Guaranteed against DOA. Joe

27 years, 7 months

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HP Laserjet Series II

by Marty＠itgonline.com

The Feed Roller Assembly indeed is the entire shaft with clutch and feed roller. My experience on SX engines has been clutch failure more often than solenoid failure on the paper control pca although the feed roller replacement was the most common failure for me. I was repairing these for the US ARmy Personnel Command in Alexandria, Virginia on a daily basis and learned to swap out the entire feed roller assembly at once to ensure the printer was back online okay and avoid a recall. I'd typically get about six SX calls a day (along with various pc problems and other printer calls) so I had to keep moving. I would rebuild these feed roller assemblies in my office when time and replacement parts allowed. Regarding the CX engine, the clutch in the cassette feed roller assembly (which requires splitting the clamshell> a piece of cake after you've done it a few times) was the biggest feed failure item I encountered. Those weird feed wedges (three I seem to recall) rarely failed. Marty ______________________________ Reply Separator _________________________________ Subject: Re: HP Laserjet Series II Author: classiccmp(a)u.washington.edu at internet Date: 12/1/98 5:04 PM > > I have repaired literally hundreds of HP II's and HP III's over the Ditto... > past 10 years. The paper feed problem you mention is a piece of cake > to repair (replace) and the parts are readily available at a very low > price. Following are the parts you need: > > HP P/N RG1-0931-060CN FEED ROLLER ASSEMBLY Isn't that the complete spindle with the clutch, etc. It's a _lot_ cheaper to buy just the worn roller (I have _never_ had a clutch fail), and almost as quick to change it. There is another common cause for paper jams in that area. Namely that one of the clutch solenoids isn't firing - either the pickup clutch solenoid or the registration solenoid. There are 2 ways to tell : How far does the paper move ? About 1" -> registration solenoid A little -> worn pickup roller Not at all -> pickup solenoid or totally worn roller. If there is a solenoid problem, there are 3 solutions : Replace the 'electronic component assembly' (PSU + clutch board) -- $$$$$$$$ Replace the switch/solenoid PCB (clutch board) -- $$$ Fix the darn thing. There are _4_ components for each clutch - the solenoid, the back-emf protection diode, the driver transistor, and its base resistor. The transistor is the most likely failure, btw. It actually takes less time to test the components than to look up the price/part number for the PCB :-) It could also be a problem on the DC controller board, but I have never had that. -tony ------ Message Header Follows ------ Received: from lists5.u.washington.edu by smtp.itgonline.com (PostalUnion/SMTP(tm) v2.1.9i(b5) for Windows NT(tm)) id AA-1998Dec01.170458.1767.81345; Tue, 01 Dec 1998 17:04:59 -0500 Received: from host (lists.u.washington.edu [140.142.56.13]) by lists5.u.washington.edu (8.8.4+UW97.07/8.8.4+UW98.06) with SMTP id OAA19811; Tue, 1 Dec 1998 14:02:35 -0800 Received: from mxu1.u.washington.edu (mxu1.u.washington.edu [140.142.32.8]) by lists.u.washington.edu (8.8.4+UW97.07/8.8.4+UW98.06) with ESMTP id OAA22394 for <classiccmp(a)lists.u.washington.edu>; Tue, 1 Dec 1998 14:01:42 -0800 Received: from post.mail.demon.net (post-12.mail.demon.net [194.217.242.41]) by mxu1.u.washington.edu (8.9.1+UW98.09/8.9.1+UW98.09) with ESMTP id OAA15 680 for <classiccmp(a)u.washington.edu>; Tue, 1 Dec 1998 14:01:10 -0800 Received: from [158.152.97.199] (helo=p850ug1) by post.mail.demon.net with smtp (Exim 2.053 #1) id 0zkxpA-0002sa-00 for classiccmp(a)u.washington.edu; Tue, 1 Dec 1998 21:59:12 +0000 Received: by p850ug1 id <m0zkvCX-000IyRC@p850ug1> (Debian /\oo/\ Smail3.1.29.1 #29.33); Tue, 1 Dec 98 19:11 GMT Message-Id: <m0zkvCX-000IyRC@p850ug1> Date: Tue, 1 Dec 1998 19:11:07 +0000 (GMT) Reply-To: classiccmp(a)u.washington.edu Sender: CLASSICCMP-owner(a)u.washington.edu Precedence: bulk From: ard(a)p850ug1.demon.co.uk (Tony Duell) To: "Discussion re-collecting of classic computers" <classiccmp(a)u.washington.edu> Subject: Re: HP Laserjet Series II In-Reply-To: <1998Dec01.092201.1767.164934(a)smtp.itgonline.com> from "Marty" at Dec 1, 98 09:23:27 am Content-Type: text X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN

27 years, 7 months

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(OT) SUBSCRIBE CLASSICCMP

by roblwill＠usaor.net

What does that have to do with fixing/using classic computers? -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1> >> Actually, a few months ago, a bus driver was stabbed to death here in Boston. >> And of course, buses are blown up often in Israel, though nothing has happened >> recently. But what were the results of this incident, Derek? How many >> injured/killed? >> >I never heared of such a thing over here. Shooting a bus driver ? >> >The last time I remember was I think 1972 at the Munich Olypics, >> >at the masacre on the airport (you may remember the terrorist >> >attack) - and of course similar things had hapend in the Bosinan >> >war. But in an ordinary city ? And mestupidone belived Seattle >> >to be a 'regular' safe place. >> >> >Gruss >> >Hans >> > >> > > >Sellam Alternate e-mail: dastar(a)siconic.com >--------------------------------------------------------------------------- --- >Always being hassled by the man. > > Coming in 1999: Vintage Computer Festival 3.0 > See http://www.vintage.org/vcf for details! > [Last web site update: 11/02/98] > >

27 years, 7 months

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DG Aviion video

by Philip.Belben＠pgen.com

> Also, the colour video output is on 3 BNC connectors. Can I use 3 segments > of ethernet coax to carry the video signal or is the impedance wrong? Has someone else answered this? I can't remember. Anyway: Impedance of Etehernet coax is 50 ohms; impedance of video coax should be 75 ohms. You will get slight ghosting from reflections etc. if your leads are longer than a few feet. More importantly, 75 ohm BNC connectors are not quite the same mechanically as 50 ohm ones. Plug in the wrong combination and you get slight mechanical damage or a poor contact (can't remember which is which. I think it's 50 ohm plug in 75 ohm socket => mechanical damage, 75 ohm plug in 50 ohm socket => poor contact) It might work in a pinch but it's not recommended. Philip.

27 years, 7 months

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Posted yesterday

by rcini＠msn.com

Hello, all: I began posting the Altair 8800b docs last night. I've posted part 1, part 2a, all of chapter 5, and the Appendicies. Enjoy, [ Rich Cini/WUGNET [ ClubWin!/CW7 [ MCP Windows 95/Windows Networking [ Collector of "classic" computers [ http://highgate.comm.sfu.ca/~rcini/classiccmp/ [ http://highgate.comm.sfu.ca/~rcini/pdp11/ <================ reply separator =================>

27 years, 7 months

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WTB: old Zenith laptop (or other laptop with 26-pin HD)

by roblwill＠usaor.net

Hi! I'm looking for an old Zenith laptop with the 26-pin type HD. The HD does NOT need to be working, nor does it need to have the HD - as long as it has a good controller. I don't need an external P/S, or a battery, either, since I have a bunch of old 12V P/S's laying around. I am willing to trade a WANG WLTC laptop for it, which has an internal P/S problem (popped a cap - probably dry electrolytic) It needs an external P/S (18V) and battery. The computer has a built-in thermal printer, and HD. The computer DOES operate, provided it has a battery and P/S (and the blown cap is replaced). I have the schematics on how to make a battery for it. I'm not necessarily looking for a Zenith, but any computer (laptop) with a 26-pin HD will do (same requirements - no battery, etc.). I'll be willing to trade for any computer BUT a Toshiba. I'm trying to rescue data off of two HD's that I have from Tandy 1400HD laptops, and I think I may have better luck finding a new computer than a new HD controller for the 1400. As always, ThAnX in advance, -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1>

27 years, 7 months

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VAX collectors attention

by CLASSICCMP＠trailing-edge.com

>> As long as we're on the topic, anyone have a Ethernet card for the >> Pro that they'd like to sell? I'm willing to pay CA$H! (The goal >> is to put Alan Baldwin's TCP/IP for RT-11 on a Pro and run a web server.) >You mean they're rare? No, they're not especially rare. It's just that I have an application for one! > I picked up a PRO350 a few years back with VR241 >monitor, DEC desk (with the motorised raise/lower column for the monitor) >_and_ an ethernet card. No, I am not selling it. And taunting me with stories about how you have one but don't use it and I can't have it doesn't particularly help me :-(. Tim.

27 years, 7 months

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WTB: old Zenith laptop (or other laptop with 26-pin HD)

by tomowad＠earthlink.net

>I'm looking for an old Zenith laptop with the 26-pin type HD. The HD does >NOT need to be working, nor does it need to have the HD - as long as it has >a good controller. I don't need an external P/S, or a battery, either, >since I have a bunch of old 12V P/S's laying around. Hi Jason, I have a Zenith Data Systems ZWL-184-97 that's missing HD & power supply/video card. If you want the motherboard (unknown condition), I'll send it to you fro $12 shipped. Sincerely, Tom -- Sysop of Caesarville Online Client software at: <http://home.earthlink.net/~tomowad/>

27 years, 7 months

1
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DG Aviion 88100 chip set

by Innfogra＠aol.com

I have about 30 chip sets for the 88100 processor and they include 2 88200s. The 88200s seem identical to me. They are matched by speed, 16, 20 & 25 MHz. Anyone need a spare set? These are pulls from never used OPUS cards that went byby. Paxton

27 years, 7 months

2
1
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HP Laserjet Series II

by Innfogra＠aol.com

Fedron is still available through Copier service centers. It works but don't get it on the plastic parts. Use sparingly. I have salvaged several laser printers with this stuff. As a fix it will work for several months but doesn't change the fact the rollers are hardening with age. Use good ventilation. Paxton

27 years, 7 months

1
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HP Laserjet Series II

by Marty＠itgonline.com

Strange but true: the CX engine predated the SX engine by several years yet Printer Works didn't produce a CX catalog until several years after their SX catalog. Yes the SX catalog is fantastic. The SX catalog has exploded views and covers every flavor of SX printer from an HP to Canon (that actually makes the engine) to Singer and Apple (Laserwriter II series), etc. The main difference between models being the I/O Formatter board. Marty ______________________________ Reply Separator _________________________________ Subject: Re: HP Laserjet Series II Author: classiccmp(a)u.washington.edu at internet Date: 12/1/98 1:12 PM PrinterWorks (Hayward, CA) has (or HAD? could anything that good not have been discontinued?) "catalogs" for the CX and SX series laser printers. Besides some basic discussion, they have exploded views and part number identification. -- Fred Cisin cisin(a)xenosoft.com XenoSoft http://www.xenosoft.com 2210 Sixth St. (510) 644-9366 Berkeley, CA 94710-2219 ------ Message Header Follows ------ Received: from lists5.u.washington.edu by smtp.itgonline.com (PostalUnion/SMTP(tm) v2.1.9i(b5) for Windows NT(tm)) id AA-1998Dec01.131218.1767.81274; Tue, 01 Dec 1998 13:12:18 -0500 Received: from host (lists.u.washington.edu [140.142.56.13]) by lists5.u.washington.edu (8.8.4+UW97.07/8.8.4+UW98.06) with SMTP id KAA07990; Tue, 1 Dec 1998 10:10:08 -0800 Received: from mxu3.u.washington.edu (mxu3.u.washington.edu [140.142.33.7]) by lists.u.washington.edu (8.8.4+UW97.07/8.8.4+UW98.06) with ESMTP id KAA17402 for <classiccmp(a)lists.u.washington.edu>; Tue, 1 Dec 1998 10:08:58 -0800 Received: from lanshark.lanminds.com (lanshark-fas1.lanminds.com [208.25.68.5]) by mxu3.u.washington.edu (8.9.1+UW98.09/8.9.1+UW98.09) with ESMTP id KAA27 721 for <classiccmp(a)u.washington.edu>; Tue, 1 Dec 1998 10:08:58 -0800 Received: from lana (lana [140.174.208.211]) by lanshark.lanminds.com (8.8.7/8.8.6) with SMTP id KAA25235 for <classiccmp(a)u.washington.edu>; Tue, 1 Dec 1998 10:08:57 -0800 (PST) Message-Id: <Pine.SOL.3.91.981201100550.24959A-100000@lana> Date: Tue, 1 Dec 1998 10:08:57 -0800 (PST) Reply-To: classiccmp(a)u.washington.edu Sender: CLASSICCMP-owner(a)u.washington.edu Precedence: bulk From: "Fred Cisin (XenoSoft)" <cisin(a)xenosoft.com> To: "Discussion re-collecting of classic computers" <classiccmp(a)u.washington.edu> Subject: Re: HP Laserjet Series II In-Reply-To: <1998Dec01.092201.1767.164934(a)smtp.itgonline.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Sender: cisin@lana X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN

27 years, 7 months

2
1
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HP Laserjet Series II

by Marty＠itgonline.com

Cleaning is an admirable thing to do but don't use alcohol. Use distilled water and a lint free cloth. Moreover, on an SX based printer (the HP II was introduced in 1987 I believe) cleaning the feed roller and separation pad may do the trick but I doubt it. The feed roller becomes glazed and hard and usually rubber restorer won't help. In most cases it turns out to be a glazed roller and/or a sticky clutch which is located on the end of the feed roller. I used to rebuild the clutches on these in the field (it is a 20 minute job at best, you need to disassemble the clutch, clean out the old contaminated lubriplate from the clutch spring, then reapply lubriplate and make certain you align the feed roller with the clutch cam) but these whole unit replacements are so cheap nowadays I wouldn't bother. Marty ______________________________ Reply Separator _________________________________ Subject: Re: HP Laserjet Series II Author: classiccmp(a)u.washington.edu at internet Date: 12/1/98 12:05 PM Max, How old are the machines? When is the last time they were CLEANED? I am no genius but the idea of CLEANING the rollers is, to me, a good one. Hope this suggustion helps you. John Amirault Max Eskin wrote: > This is a couple of months off topic,but I'll post it anyway. At my school, > there are a couple dozen Laserjet Series IIs. I've been trying to install > four into one room, and for some reason almost every single one claims a paper > jam right as soon as I tell it to print ( a self test, for example). The paper > hardly gets out of the tray, it's generally just starting to get past the > roller that pulls it in when the printer returns an error. Sometimes it does > this, sometimes it doesn't. Any ideas? > > Thanks ------ Message Header Follows ------ Received: from lists5.u.washington.edu by smtp.itgonline.com (PostalUnion/SMTP(tm) v2.1.9i(b5) for Windows NT(tm)) id AA-1998Dec01.120520.1767.81238; Tue, 01 Dec 1998 12:05:20 -0500 Received: from host (lists.u.washington.edu [140.142.56.13]) by lists5.u.washington.edu (8.8.4+UW97.07/8.8.4+UW98.06) with SMTP id JAA03937; Tue, 1 Dec 1998 09:03:05 -0800 Received: from mxu2.u.washington.edu (mxu2.u.washington.edu [140.142.32.9]) by lists.u.washington.edu (8.8.4+UW97.07/8.8.4+UW98.06) with ESMTP id JAA30614 for <classiccmp(a)lists.u.washington.edu>; Tue, 1 Dec 1998 09:02:52 -0800 Received: from lima.epix.net (lima.epix.net [199.224.64.56]) by mxu2.u.washington.edu (8.9.1+UW98.09/8.9.1+UW98.09) with ESMTP id JAA23 476 for <classiccmp(a)u.washington.edu>; Tue, 1 Dec 1998 09:02:51 -0800 Received: from epix.net (mtrs-244ppp230.epix.net [205.238.244.230]) by lima.epix.net (8.9.0/8.9.0/1998093001/Philippe Levan) with ESMTP id MAA16564 for <classiccmp(a)u.washington.edu>; Tue, 1 Dec 1998 12:02:48 -0500 (EST) Message-Id: <366421E9.9E3184DC(a)epix.net> Date: Tue, 01 Dec 1998 12:05:45 -0500 Reply-To: classiccmp(a)u.washington.edu Sender: CLASSICCMP-owner(a)u.washington.edu Precedence: bulk From: John Amirault <amirault(a)epix.net> To: "Discussion re-collecting of classic computers" <classiccmp(a)u.washington.edu> Subject: Re: HP Laserjet Series II References: <98113019113300.00619(a)localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Sender: "John Amirault" <amirault(a)in.epix.net> (Unverified) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN

27 years, 7 months

2
1
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HP Laserjet Series II

by Marty＠itgonline.com

A word of caution on replacing parts on these SX printers: when you reseat the connector for the main motor to the DC Power Supply, make certain the snap connector 'snaps' and that it isn't doesn't feel 'mushy' or you may discover you have a false main motor error (error code 54 I believe) after having buttoned up the printer. Reseat the connector at least twice. Before replacing the top cover power it up, there are no interlocks involved and you needn't have the control panel attached to run an engine test. On the left or right side (I forget which side) bottom of the HP II you will see a hole about 1/8" in diameter. If you press the rubber membrane covered microswitch inside the hole the engine test will run and print a sheet with finely spaced parallel lines running longitudinally on the copy. This will verify the main motor connector was reseated properly and that the feed roller was replaced properly. On an SX (HP II, III, IID and IIID) engine always reseat these snap connectors prior to replacing parts such as the laser scanner (reseat both at the scanner and dc controller, and all sensors at the dc controller. Marty ______________________________ Reply Separator _________________________________ Subject: Re: HP Laserjet Series II Author: classiccmp(a)u.washington.edu at internet Date: 12/1/98 11:22 AM On Tue, 1 Dec 1998, Marty wrote: > I have repaired literally hundreds of HP II's and HP III's over the > past 10 years. The paper feed problem you mention is a piece of cake > to repair (replace) and the parts are readily available at a very low > price. Following are the parts you need: > > HP P/N RG1-0931-060CN FEED ROLLER ASSEMBLY > > HP P/N RF1-1145-020CN SEPARATION PAD > > SOURCES FOR ABOVE PARTS: > > Atlantis 1-800-733-9155 (Norcross, GA) > > Impact Sales 1-800-280-4521 (Madison, WI- ask for Don) > > PC Service Source 1-800-727-2787 (Dallas, TX) > > Printer Works 1-800-235-6116 (Hayward, CA) Ya know.. this is what I get for even *dealing* with our MIS (Mostly Incompetent Shi*theads) dept... you'd think after 10 years with the same company I'd learn... I should have researched the roller prob myself.... Anyway... I'm going to offer to take all those 'dead' HP IIs off the company's hands, and then *fix* the damn things, and **sell** them... or trade them for Stuff... the last time they dumpstered a whole storeroom I got tons of swappable Stuff.. woo hoo! I love Surplus!! Thanks VeryVery much for the roller and parts supplier info.. Cheers John ------ Message Header Follows ------ Received: from lists3.u.washington.edu by smtp.itgonline.com (PostalUnion/SMTP(tm) v2.1.9i(b5) for Windows NT(tm)) id AA-1998Dec01.112204.1767.81227; Tue, 01 Dec 1998 11:22:05 -0500 Received: from host (lists.u.washington.edu [140.142.56.13]) by lists3.u.washington.edu (8.8.4+UW97.07/8.8.4+UW98.06) with SMTP id IAA22869; Tue, 1 Dec 1998 08:19:41 -0800 Received: from mxu2.u.washington.edu (mxu2.u.washington.edu [140.142.32.9]) by lists.u.washington.edu (8.8.4+UW97.07/8.8.4+UW98.06) with ESMTP id IAA29406 for <classiccmp(a)lists.u.washington.edu>; Tue, 1 Dec 1998 08:19:26 -0800 Received: from netcom4.netcom.com (jpl15(a)netcom4.netcom.com [192.100.81.107]) by mxu2.u.washington.edu (8.9.1+UW98.09/8.9.1+UW98.09) with ESMTP id IAA17 482 for <classiccmp(a)u.washington.edu>; Tue, 1 Dec 1998 08:19:23 -0800 Received: (from jpl15@localhost) by netcom4.netcom.com (8.8.5-r-beta/8.8.5/(NETCOM v1.02)) id IAA12239; Tue, 1 Dec 1998 08:19:16 -0800 (PST) Message-Id: <Pine.3.89.9812010849.A11271-0100000@netcom4> Date: Tue, 1 Dec 1998 08:19:16 -0800 (PST) Reply-To: classiccmp(a)u.washington.edu Sender: CLASSICCMP-owner(a)u.washington.edu Precedence: bulk From: John Lawson <jpl15(a)netcom.com> To: "Discussion re-collecting of classic computers" <classiccmp(a)u.washington.edu> Subject: Re: HP Laserjet Series II In-Reply-To: <1998Dec01.092201.1767.164934(a)smtp.itgonline.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN

27 years, 7 months

2
1
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HP Laserjet Series II

by Marty＠itgonline.com

I have repaired literally hundreds of HP II's and HP III's over the past 10 years. The paper feed problem you mention is a piece of cake to repair (replace) and the parts are readily available at a very low price. Following are the parts you need: HP P/N RG1-0931-060CN FEED ROLLER ASSEMBLY HP P/N RF1-1145-020CN SEPARATION PAD SOURCES FOR ABOVE PARTS: Atlantis 1-800-733-9155 (Norcross, GA) Impact Sales 1-800-280-4521 (Madison, WI- ask for Don) PC Service Source 1-800-727-2787 (Dallas, TX) Printer Works 1-800-235-6116 (Hayward, CA) I will supply you with tech support to replace these parts. Email me: marty(a)itgonline.com You will need to remove the top cover, front support plate and dc power supply. Removal of the high voltage power supply is recommended to facilitate access to the left screw holding the feed roller assembly but you can snake a screwdriver in without a problem. ______________________________ Reply Separator _________________________________ Subject: Re: HP Laserjet Series II Author: classiccmp(a)u.washington.edu at internet Date: 11/30/98 11:50 PM On Mon, 30 Nov 1998, Max Eskin wrote: > This is a couple of months off topic,but I'll post it anyway. At my school, > there are a couple dozen Laserjet Series IIs. I've been trying to install > four into one room, and for some reason almost every single one claims a paper > jam right as soon as I tell it to print ( a self test, for example). The paper > hardly gets out of the tray, it's generally just starting to get past the Ahhh, yes.. this one I know well. The company whose time clock I punch has about three dozen of these old guys in a store room.. they all have the same problem.. and it is: the very front set of rollers (the pick-and-feed rollers) over the paper tray have become hardened and non-gummy with age. The fix is: replace the rollers. The problem is: no rollers available. The solution: give them up for adoption, and when nobody wants them... well, you know the rest. One could kludge together something to go around the old rollers, but the sveral things I tried just didn't perform reliably, mainly causing double and/or multiple feeds... They they brough me a brand-new modern HP 4L and I quit being frustrated by the old one. Cheers John ------ Message Header Follows ------ Received: from lists4.u.washington.edu by smtp.itgonline.com (PostalUnion/SMTP(tm) v2.1.9i(b5) for Windows NT(tm)) id AA-1998Nov30.235024.1767.81114; Mon, 30 Nov 1998 23:50:25 -0500 Received: from host (lists.u.washington.edu [140.142.56.13]) by lists4.u.washington.edu (8.8.4+UW97.07/8.8.4+UW98.06) with SMTP id UAA07884; Mon, 30 Nov 1998 20:48:08 -0800 Received: from mxu4.u.washington.edu (mxu4.u.washington.edu [140.142.33.8]) by lists.u.washington.edu (8.8.4+UW97.07/8.8.4+UW98.06) with ESMTP id UAA28442 for <classiccmp(a)lists.u.washington.edu>; Mon, 30 Nov 1998 20:48:00 -0800 Received: from netcom11.netcom.com (jpl15(a)netcom11.netcom.com [192.100.81.121]) by mxu4.u.washington.edu (8.9.1+UW98.09/8.9.1+UW98.09) with ESMTP id UAA21 188 for <classiccmp(a)u.washington.edu>; Mon, 30 Nov 1998 20:47:59 -0800 Received: (from jpl15@localhost) by netcom11.netcom.com (8.8.5-r-beta/8.8.5/(NETCOM v1.02)) id UAA24075; Mon, 30 Nov 1998 20:42:49 -0800 (PST) Message-Id: <Pine.3.89.9811302010.A22096-0100000@netcom11> Date: Mon, 30 Nov 1998 20:42:49 -0800 (PST) Reply-To: classiccmp(a)u.washington.edu Sender: CLASSICCMP-owner(a)u.washington.edu Precedence: bulk From: John Lawson <jpl15(a)netcom.com> To: "Discussion re-collecting of classic computers" <classiccmp(a)u.washington.edu> Subject: Re: HP Laserjet Series II In-Reply-To: <98113019113300.00619(a)localhost.localdomain> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN

27 years, 7 months

4
3
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FSOT: HP 9815 (aka 9000 216)

by rigdonj＠intellistar.net

Hi, I need to clean up some of the excess around here before Christmas so I'm offering a HP 9816 computer for sale or trade for the best offer. I have another and need to get this one out of the way. The 9816 is the smallest of the HP 9000 series 200 computers and has a 68000 CPU. It runs BASIC, HPL and/or Pascal. This one works fine but is missing the top cover and some of the keytops for the keyboard. The switchs are intact so tops can robbed >from another HP keyboard and simply plugged in. It does include the original small keyboard. These keyboards are rare since most users bought the bigger HP 98203 keybaord. For more information, look at "http://www.intellistar.net/~rigdonj/hp9000.htm". Joe

27 years, 7 months

1
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VAX collectors attention

by CLASSICCMP＠trailing-edge.com

>I've got an 8530 and it's console here. It's a Pro380 IIRC. >It's front panel is marked Vaxconsole, but it has Pro380 on it somewhere >else >I think.... I'll have a look... At least on the North American models, there's a UL/CSA sticker near the power jack with the model designation (i.e. "PC380-AA"). It certainly could've been a Pro 350 that originally shipped with the Venus. The ones I've seen are 380's, but I don't know if they're original or not. Since *the* definitive RT-11 Pro expert is on this list, I'm certain we'll get a good answer soon :-) As long as we're on the topic, anyone have a Ethernet card for the Pro that they'd like to sell? I'm willing to pay CA$H! (The goal is to put Alan Baldwin's TCP/IP for RT-11 on a Pro and run a web server.) -- 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

27 years, 7 months

3
2
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Decus (was Re: networking newbie

by CLASSICCMP＠trailing-edge.com

>And on the same topic, didn't DECUS provide free (or low cost) software >applications? Did the same mentality apply to that, or did the letters "DEC" >tend to give more credibility to that software? DECUS distributes (and has distributed) software that others wrote and put into the public domain. *Very* roughly speaking, DECUS-distributed software can be split into two groups: 1. Software that DEC employees wrote on DEC time, and which DEC put into the public domain so that DECUS could distribute it. BLISS-32 is a recent example. Often these are tools that were used internally to DEC for development purposes, which they don't want to turn into commercially supported products, but they recognize the great usefulness of these tools. 2. Software that random ordinary users wrote and gave to DECUS to distribute. Keep in mind that "random ordinary users" in the 1960's or 1970's often means something very different than it does today. Also, DECUS is a different organization today than it was 10 or 20 or 30 years ago. You might want to browse through the VMS-oriented DECUS submissions at http://www.decus.org/ , or the PDP-11 oriented DECUS submissions at http://sunsite.unc.edu/pub/academic/computer-science/history/pdp-11/decus/ and view the wide range of stuff available, and the wide range of sources that it comes from! -- 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

27 years, 7 months

1
0
0 0

HP Laserjet Series II

by kurtkilgor＠geocities.com

This is a couple of months off topic,but I'll post it anyway. At my school, there are a couple dozen Laserjet Series IIs. I've been trying to install four into one room, and for some reason almost every single one claims a paper jam right as soon as I tell it to print ( a self test, for example). The paper hardly gets out of the tray, it's generally just starting to get past the roller that pulls it in when the printer returns an error. Sometimes it does this, sometimes it doesn't. Any ideas? Thanks

27 years, 7 months

6
5
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Audio Cassette formats; Copy protection?

by Philip.Belben＠pgen.com

>::There are plenty of ways of preventing a BASIC program from being listed. >::Dunno how you prevent it being saved (and say 'BAD PROGRAM'), but I could >::probably figure it out given time... Anyone else? > > On the 64, you could type > > 10 remL > > (rem, then a shifted-L) > > and LIST will stop up with a ?SYNTAX ERROR when it hits that line. Rather > easy to defeat but annoying as heck. :-) Same on Basic 2 PETS. On BASIC 1 you used shift-K. Possibility that I thought of, but didn't try. Make the initial line a v. high line number (>63999). Have the program start rem L, then disable the stop key, then poke that line number to something smaller. Bit harder to defeat but won't deter the determined cracker. Mean trick I did use. In the middle of a subroutine I entered the line REM@TURN I then found the @ sign and poked the location with 20 (ctrl-T, the PET backspace) This now lists as RETURN but does nothing... Philip.

27 years, 7 months

1
0
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Replacing 6550s

by Philip.Belben＠pgen.com

>> > Why do POKE and PEEK fail there? Was that done on purpose or is it just >> > the result of something lame like using a signed value to represent >> > addresses? >> No, it's software. It was a feature that was supposed to prevent >> inquisitive geeks disassembling the BASIC ROM between $C000 and (I think) >> $E7FF. The OS ROMs, above $F000, were peekable, though, as was the I/O > > It was totally useless for that. The sort of person who could disassemble > and make sense of the BASIC ROM was the sort of person who could also > write enough machine code to copy the ROM into (peekable) RAM a few K at > a time... I just added a little machine code routine to my disassembler that peeked the byte it was looking at for it. I was really annoyed to find that I needed one for the assembler as well to do the poking... BTW BASIC programs up in the ROM expansion space didn't work. The machine relied on the MSB of the address not being set for one or two things, I can't remember what. Philip.

27 years, 7 months

1
0
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VAX collectors attention

by netcafe＠pirie.mtx.net.au

-----Original Message----- From: Bill Pechter <pechter(a)pechter.dyn.ml.org> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Wednesday, 2 December 1998 0:32 Subject: Re: VAX collectors attention >> At least on the North American models, there's a UL/CSA sticker near >> the power jack with the model designation (i.e. "PC380-AA"). Yup. I just looked. It's a 380. Cheers Geoff Computer Room Internet Cafe Port Pirie South Australia. netcafe(a)pirie.mtx.net.au

27 years, 7 months

1
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networking newbie

by JRichardson＠softwright.co.uk

>> A friend of mine at a large company (whose initials are International >> Business Machine, but you didn't hear that from me 8-) had to route traffic >> between Token Ring and Ethernet. NT didn't work (no surprise there), Hmm, I had exactly the same trouble. Worked fine on a linux machine routing between our company token ring and a couple of SGI Origin servers on 100 meg ethernet, but NT wasn't having any of it. Unfortunately I seem to be the only person here who has any real Unix skills, so Linux was out of the question for the router. I ended up writing a Java application to relay socket connections on the NT machine that sat between the ethernet and token ring, so at least HTTP and Telnet would work - FTP had to be done as a two-stage process... cheers Jules >(sorry for OT)

27 years, 7 months

2
1
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VAX collectors attention

by mbg＠world.std.com

>As far as the Pro ethernet... I'd kill for one too. The part you need is the DECNA... I might just have one (maybe two). I'll have to check... Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

27 years, 7 months

1
0
0 0

Sim VGA?

by roblwill＠usaor.net

>> >> Hi! >> I know that there's a program to make a Hercules Mono monitor emulate a CGA, >> but is there a program that will allow a CGA emulate an EGA or VGA? > >That's rather like asking if a PC/XT can emulate a 386. Well I don't see why some sort of software could make a CGA emulate a VGA. Or a video card that would be VGA, but drive a CGA monitor, since the video card in my Pentium will drive a composite Apple monitor at 640x480 16.million colors. I basically want to get better graphics from the programs that I use on my laptops (most are CGA). I'm usually stuck in text mode, 2-color CGA, but even EGA would be better, and getting a new video card and monitor just isn't an option. -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1>

27 years, 7 months

3
2
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VAX collectors attention

by allisonp＠world.std.com

< > (Oh and an HSC50 whatever the heck that is!) < < Hierarchical Storage Controller. < Waist high filing cabinet sized box, HEAVY too. < Basically, it's a PDP8 I think, running a little o/s called CRONIC PDP11, used the T-11 chip. NOT PDP-8. I believe CRONIC was an application (control program) and ran under a truncated version of RT-11. Allison

27 years, 7 months

2
1
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Barely on-topic

by roblwill＠usaor.net

>Hmm.. This should be easy. Install /bin/cat. The cat, as usual, will eat >the fish. > Haven't tried that yet, but the /bin/cat/ folder is on the unaccessable HD... >Seriously, something is overheating. If you can get to the board with it >in the machine, can you detect any semiconductor that's too hot. Where >does the smell seem to be coming from - the HD controller, the machine's >PSU, or where? > I'm figuring that the smell is coming from the HD controller board, getting sucked through the P/S's tiny 1" fan, and blown out the top of the computer. The HD controller is plugged in right next to the P/S. I think one of the chips on the HD controller blew, because it was one of the common ailments of the 1400. -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1>

27 years, 7 months

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Barely on-topic

by roblwill＠usaor.net

>First, check if there's a fish stuck in your laptop. Second, have you >looked closely at the controller card to see if there is any obvious >melting of parts, or blackened spots? Check each component for excessive >heat (excessive meaning if you touch it and it instantly burns your >finger). Have you tried the hard drive in another machine? Be careful, >if the hard drive is at fault here you may end up frying fish with another >controller card. > I've found that the fish smell is from some capacitors on the controller. There's no sign of overheating, other than a few plastic labels (on the chips) are a bit curled on the ends. I really have no way of testing the HD, since it's one of those weird 26-pin type like the Zenith laptops used to use. The only other computer that I have that it may work in is an old WANG WLTC, and the drive in it is 10 MB, and made by JVC, where the one in the Tandy is an Alps. I think that the HD controller was one of the 1400's faults (other than the power supply). I've already worked on two 1400's with blown P/S's and HD controllers. What I've noticed is that the HD controller will quit, then the power supply will blow out (usually a microfuse). The 1400HD was basically just a 1400FD with a factory-installed HD upgrade kit. I currently have the floppy from the second 1400 in the one I'm trying to fix, but there's some stuff on the HD that I'd like to get off of it, but have no way of doing so. -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1>

27 years, 7 months

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PS/1 model

by jolminkh＠nsw.bigpond.net.au

Max Eskin wrote: >I saw an odd machine in a thrift store today, a machine labelled a PS/1, but it >looked nothing like the PS/1 valuepoints, or any other PC I've ever seen. It >looked like a cross between a PCjr and a soap dish. One 3.5" floppy drive, huge >ugly vents and IBM logo on the front, on the back are ports for mouse, >keyboard, VGA, 2400 bps modem, and parallel printer. It also has a little fan >and some sort of slot cover that fell out. Where is the power switch? Where >does the power connect to? That's the original PS/1, a 286 with an almost totally closed architecture. Needs the special monitor to give it power. I happened to pick up a lone monitor like this last week. Pity I'm in Australia though. I've only seen a couple of these around here in the last few years. Hans Olminkhof

27 years, 7 months

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VAX collectors attention

by geoffrob＠stmarks.pp.catholic.edu.au

-----Original Message----- From: Allison J Parent <allisonp(a)world.std.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Tuesday, 1 December 1998 15:37 Subject: Re: VAX collectors attention >< > (Oh and an HSC50 whatever the heck that is!) >< >< Hierarchical Storage Controller. >< Waist high filing cabinet sized box, HEAVY too. >< Basically, it's a PDP8 I think, running a little o/s called CRONIC >PDP11, used the T-11 chip. NOT PDP-8. Ok, thanks for clearing that up, I wasn't sure. :^) >I believe CRONIC was an application (control program) and ran under a >truncated version of RT-11. I'll take your word for it. The manual I have doesn't actually say CRONIC is the O/S, it just implies that it it. Probably an unwarranted assumption on my part. Thanks for filling in the gaps. :^) Cheers Geoff Roberts Computer Systems Manager Saint Marks College Port Pirie South Australia. My ICQ# is 1970476 Ph. 61-411-623-978 (Mobile) 61-8-8633-0619 (Home) 61-8-8633-8834 (Work-Direct) 61-8-8633-0104 (Fax)

27 years, 7 months

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Visual Commuter (fwd)

by siconic＠jasmine.psyber.com

Can someone help Father Martin? ---------- Forwarded message ---------- Date: Mon, 30 Nov 1998 17:32:19 -0500 From: "Martin Fors (ICQ 3024642)" <revmrf(a)together.net> To: archive(a)siconic.com Subject: Visual Commuter Hi, Perhaps you may help me. I'm trying to find an LCD for my Visual Commuter which I've had for many years. Can you help with a contact? A Long time ago there was a users group, but I've lost contact. marty Rev. Martin R. Fors Grace United Methodist Church Main St., POB 726 Bradford, Vermont 05033 USA revmrf(a)together.net [ICQ# 3024642] or revmrf(a)bigfoot.com <<http://www.gbgm-umc.org/bradford/>> Sellam Alternate e-mail: dastar(a)verio.com ------------------------------------------------------------------------------- Always being hassled by the man. Coming in 1999: Vintage Computer Festival 3.0! See http://www.vintage.org/vcf for details [Last web page update: 11/02/98]

27 years, 7 months

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PET Video

by foxnhare＠goldrush.com

> From: Cameron Kaiser <ckaiser(a)oa.ptloma.edu> > Subject: Re: PET Video (was: Replacing 6550s) & 128 > > ::The only Commodore computer with rubber keys that I have heard of is the > ::Commodore 116. > > Actually, the Ultimax has them too. I have a 116 case, and the keyboard is > abominable -- almost, but not quite as bad, as the Tomy Tutor's.

27 years, 7 months

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Sim VGA?

by roblwill＠usaor.net

Hi! I know that there's a program to make a Hercules Mono monitor emulate a CGA, but is there a program that will allow a CGA emulate an EGA or VGA? One other question: Was there a Tandy laptop made that looked like the 1400, but had an EGA or VGA display? ThAnX, -Jason

27 years, 7 months

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VAX collectors attention

by geoffrob＠stmarks.pp.catholic.edu.au

From: Bill Pechter <pechter(a)pechter.dyn.ml.org> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Tuesday, 1 December 1998 14:57 Subject: Re: VAX collectors attention >I thought the 8600's used Pro350's when I worked on them. >Some of the later 8000 series used Pro380's, I was told. I've got an 8530 and it's console here. It's a Pro380 IIRC. It's front panel is marked Vaxconsole, but it has Pro380 on it somewhere else I think.... I'll have a look... Cheers Geoff Roberts Computer Systems Manager Saint Marks College Port Pirie South Australia. My ICQ# is 1970476 Ph. 61-411-623-978 (Mobile) 61-8-8633-0619 (Home) 61-8-8633-8834 (Work-Direct) 61-8-8633-0104 (Fax)

27 years, 7 months

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DG Aviion video

by geoffrob＠stmarks.pp.catholic.edu.au

From: R. Stricklin (kjaeros) <red(a)bears.org> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Tuesday, 1 December 1998 13:18 Subject: DG Aviion video >I've picked up a Data General Aviion 310CD and was informed it can use a >straight AT keyboard. I am skeptical, as the keyboard port is a DIN8. My 4100 does. Don't recall how many pins thought, but a Honeywell AT keyboard works fine, though a cheapy generic one did not. YMMV, since it's a different model. I'll have a look at the connector later in the day and let you know. >Also, the colour video output is on 3 BNC connectors. Can I use 3 segments >of ethernet coax to carry the video signal or is the impedance wrong? Well, you should use 75 ohm coax by rights, but 52 ohm thin ethernet cable should work ok. You might - emphasize might - get a little minor ghosting on the image with 52 ohm cable, but you won't blow it up. TV antenna coax is 75 ohm if you want to get it exactly right. I doubt if you'd be able to see any difference. I believe it has the sync on the green channel. >Actually, I've had a hard time locating info on this machine. Data General Unix only. Virtually System 5 Release 4. There is no specific DGUX news group, though there are a few lurkers in comp.os.aos (DG's Advanced Operating System - for big iron) that have some useful information. I have the procedure for getting past the password here somewhere. Found it at some very obscure web site. The manuals for DGUX are available online in PDF form. Doubtless a much later version than yours, but it will help a lot. The web site doesn't allow you to directly download them, just read on-line. (Not sure if this is deliberate, but anyway, once Acrobat loads the page for online reading, you can clone the file from the temp directory, before you close the web page) I have most of the Doc set for the current version of DGUX as a result. ;^) Don't recall the url at the moment, but I'll dig it up for you if you like. I emailed Data General early in the piece, looking for information, and got NO response. > I understand it uses a Motorola 88k processor at 20 MHz, but I don't know which one. > looked inside and found three chips it could be.. an 88100 (88010?) and >two 88200 (88020?)s. I assume the single chip is the CPU but then what >are the other two? Not sure, sorry. I'll pull the lid off one of mine later and have a look, hard to find much on the cpus. >I would be really surprised if this were a multiprocessing box. I wouldn't be. One of mine is. :^) Yours is a different (earlier?) model, I have two Aviions, one is a single cpu 33mhz box, the other a dual cpu 20mhz. (I'll post the exact model numbers later today) Unfortunately, I have yet to find an (affordable) monitor, and it has an odd mouse port, I'm led to believe it is the same connector as on a Sun, but not sure if the Sun mouse would work or not, and I don't have one to try. At first glance, it looked like a PS2 mouse port, but the pinout is quite different. Cheers Geoff Roberts Computer Systems Manager Saint Marks College Port Pirie South Australia. My ICQ# is 1970476 Ph. 61-411-623-978 (Mobile) 61-8-8633-0619 (Home) 61-8-8633-8834 (Work-Direct) 61-8-8633-0104 (Fax)

27 years, 7 months

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