test-drb

test-drb@ccmp.vtda.org

101090 discussions

by dm561＠torfree.net

Date: Fri, 22 Feb 2008 10:26:35 -0500 (EST) From: der Mouse <mouse at Rodents.Montreal.QC.CA> Subject: Re: Sockets (was: Ebay grrrr #743) >> I've been told that gold-plated sockets are a waste of money if what >> you're going to be socketing is tinned-lead packages. Something >> about gold-to-gold and tin-to-tin makes for the best results. >Well, it reduces corrosion. ><snip> >I'd say gold/gold is probably best, since it's the most >corrosion-resistant in both these senses. But whether I'd prefer >gold/tin or tin/tin depends on the tradeoffs. >der Mouse ---------- We've had this thread before, but don't forget about stuff like Stabilant 22. I had endless problems with sockets in AIM65s (similar to the cheap sockets in a PET) installed in a plant full of oil and other contaminants in the air; finally pulled them all out, cleaned and treated the sockets & chips with Stab 22, and no more problems. Also did my PETs at that time and never had a problem with IC sockets in them either; still running fine today. mike

18 years, 1 month

flying reading of floppy media

by aek＠bitsavers.org

> A thick rigid base and a very thin, > hard cap, with the media immobile between them. The whole assembly > would turn in the reader. I don't know whether the media could actually > be read through that It was possible to do this. Univac metal tape reels actually had a spool of mylar tape to isolate the metal tape from the heads, for example. There would be a lot of loss in the transducer, though, which you may be able to compensate for by using a magnetorestrictive instead of inductive head. I haven't pulled apart an Iomega bernolli drive to see if you could fly a 5" floppy over the plate and use the head in it for recovery.

18 years, 1 month

media reading and temperature

by aek＠bitsavers.org

> So I'm wondering if temperature has any affect on media readability. yes. You walk a very dangerous line with condensation reading cold media, though. It has been my experience that mag tapes shed more if they are warm, so after baking, I let them return to room temperature in the tape reading room, which is dehumidified to as low as the dehumidifier will go (< 35%)

18 years, 1 month

Fwd: [alt.sys.pdp11] Ebay: pdp 11/34 + lots of stuff

by legalize＠xmission.com

This message has been forwarded from Usenet. To reply to the original author, use the email address from the forwarded message. Date: Fri, 22 Feb 2008 07:38:28 +0100 (CET) Groups: alt.sys.pdp11 From: Jeff Davis <jdaviscl2 at soupwizard.com> Org: Aioe.org NNTP Server Subject: Ebay: pdp 11/34 + lots of stuff Id: <Xns9A4BE64E9F5D4jdaviscl2soupwizardc at 194.177.96.78> ======== Just fyi, it's not my auction, but there's a pdp-11/34 in two racks, a tape drive and large hard drives on ebay. Two days left, I figure somebody with a big truck wants to save it. I normally wouldn't post about an ebay auction, but this one doesn't mention pdp-11 in the auction title and seems to have been overlooked. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=120223434668 jdavis

18 years, 1 month

RLV12 placement in H9278-A question

by tiggerlasv＠aim.com

On Feb-21-08 at 16:05:45, Jerome Fine wrote: > If my memory serves me correctly (which is not very > frequent these days), I seem to remember receiving > a BA23 box with an M8189 in the top slot and the > RLV11 in to next 2 slots. The memory for the system > (normal PDP-11 Qbus memory) was in slot 4. > As far as I know, there might be a delay factor > associated with placing the memory below the RLV11, > but it still functions correctly. It's entirely possible that it would work correctly. Covention has always been that PMI memory immediately precedes the CPU, and NON-PMI memory immediately follows the CPU. I've always just assumed that there was a reason for it, and never really questioned it, since I had no need to. I'm surprised anyone would bother with an RLV11 in a BA23, since the RLV12 was readily available at the time, and supports 22-bit. Much less space, power, and heat. Although sometimes you just have to work with what is at-hand. ;-) T ________________________________________________________________________ More new features than ever. Check out the new AIM(R) Mail ! - http://webmail.aim.com

18 years, 1 month

System 36 SSP on 5.25" media?!

by ceby2＠csc.com

Periodically I thow this request out to see if there are new cctalkers watching. I have a long term goal of rebuilding both my 5363 and 5364 systems. But I've never managed to source a copy of the OS media. I've long had a copy of the media for 5360/5362, but that's not binary compatible and is distributed on 8" media anyway. So one more time... does anyone have System 36 SSP on 5.25" media I can beg, borrow, or buy? Can anyone help? Thanks, Colin Eby CSC Computer Sciences Limited Registered Office: Royal Pavilion, Wellesley Road, Aldershot, Hampshire, GU11 1PZ, UK Registered in England No: 0963578 ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- This is a PRIVATE message. If you are not the intended recipient, please delete without copying and kindly advise us by e-mail of the mistake in delivery. NOTE: Regardless of content, this e-mail shall not operate to bind CSC to any order or other contract unless pursuant to explicit written agreement or government initiative expressly permitting the use of e-mail for such purpose. ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

18 years, 1 month

RLV12 placement in H9278-A question

by tiggerlasv＠aim.com

On 21-Feb-08, at 17:28:32, John A. Dundas III wrote: > This is being used temporarily in a system with an M8189 (KDF11) and > M7551 (MSV11-Q, 4MB memory), so only one CD slot is currently > available. Just wondered whether I needed to reserve that slot or > not. Looks like not, so I'll use an appropriate Q/Q slot. If your're tight on open slots, the 3rd slot is a good spot for a quad board, since the CD slot is otherwise unuseable in your current configuration. T ________________________________________________________________________ More new features than ever. Check out the new AIM(R) Mail ! - http://webmail.aim.com

18 years, 1 month

Hoeneywell-Bull DPS9000

by cclist＠sydex.com

I was going through some old code and discovered that I wrote a DOS driver to handle Honeywell-Bull DPS9000 GCOS floppies. I don't recall the exact circumstances, only that we equipped the customer with a Compaticard and a modified dual drive (5.25" and 3.5") box, although one isn't required for operation. Does anyone collect these old systems? Would you be interested in a copy of the code? Cheers, Chuck

18 years, 1 month

Quad cards in Q-bus

by bqt＠softjar.se

After seeing the discussion on placement of RLV12 in Q-bus, I got the impression that some people think that any quad card can be placed in both Q/Q and Q/CD slots without worry. That's incorrect. Some quad cards can be placed in either, but there are jumpers that needs to be set accordingly for the system to work. Just thought I'd point it out. It's not as easy as ABC. Oh, and Unibus is really simple as well, despite what people say. :-) Johnny (Who prefers Unibus) -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

18 years, 1 month

RLV12 placement in H9278-A question

by dundas＠caltech.edu

Perhaps someone could clarify, the manuals are less than explicit on this. What kind of slot can the RLV12 be placed in? Does it need a Q22/Q22, Q22/CD, does it not matter, or are there jumpers to accommodate either? Before I fry something I'd like to make sure I've got this right. Thanks, John

18 years, 1 month

The "who lives where" map...

by jules.richardson99＠gmail.com

Way back, wasn't there talk of some kind of "rescue map" showing which classiccmpers lived where (roughly) and thus providing a clue as to who might be able to help* with rescues? * I'm thinking pickups, extra people-power, or just "get stuff a little nearer to me"... Maybe it's one of those Google Maps type applications, along with some contact info and the type of hauling ability (micro/mini/mainframe) potentially available? (I'm trying to work out the best way of getting a mini-sized system from the middle of CO to the middle of MN at the moment - or at least get it a little closer so I can borrow a friend's truck to go get it. Struck me that a "who is where" map would be handy! :-) cheers Jules

18 years, 1 month

Fwd: MINDSET buffs...

by lbickley＠bickleywest.com

Two additional points - based on questions I received regarding the MINDSET systems: 1. If you are not local, Weirdstuff will ship. If you win the lot, just tell the person who calls you that you want the lot shipped. 2. I said "Two brand new MINDSET systems" - I should have said they "look brand new". I have no idea if they are really brand new or are just in excellent condition... Lyle ---------- Forwarded Message ---------- Subject: MINDSET buffs... Date: Thursday 21 February 2008 12:20 From: Lyle Bickley <lbickley at bickleywest.com> To: "General Discussion: On-Topic Posts Only" <cctech at classiccmp.org> I just checked this out at Weirdstuff - Two brand new MINDSET systems with what looks like every accessory ever made for the critter, including O/S, development software, documentation, the original boxes, etc. See: http://images.weirdstuff.com/full/Bay2.jpg Here's information on how to bid (sealed bid auction): 1. The auction closes on 2/25/2008 at 6PM. 2. The Minimum bid is $26 per lot. 3. Winning bidders will be notified on following day by 12:00 PM. 4. Material must be paid for and picked up the same week. 5. Pickup times are 9:30 AM to 6PM, Monday through Saturday. 11AM-5PM on Sunday. If you are not local to the S.F. Bay Area, shipping is available. 6. Lots are sold AS-IS. The Lot number for the MINDSETs is: #23 You can FAX your Bid to: 408-743-5655 NOTE: I am associated with Weirdstuff only as a client (someone who buys stuff from them). I am not a collector of MINDSET gear, but after seeing it in the bid sale, I felt that some folks on the list would probably find this an interesting lot. Cheers, Lyle -- Lyle Bickley Bickley Consulting West Inc. Mountain View, CA http://bickleywest.com "Black holes are where God is dividing by zero" ------------------------------------------------------- -- Lyle Bickley Bickley Consulting West Inc. Mountain View, CA http://bickleywest.com "Black holes are where God is dividing by zero"

18 years, 1 month

RLV12 placement in H9278-A question

by tiggerlasv＠aim.com

As you've probably read in a previous reply, it doesn't really matter what type of slot it goes into, as long as you're not interrupting the path of a 2-board set. i.e., don't try to put it in between the boards of an RLV11. Now that I think about it, I guess it's a little moot, since you're in an 9278-A backplane, which only has 3 CD slots. The only way you could even use a 2-board CD-interconnect (such as the RLV11) is with a single-board CPU with on-board memory, such as an 11/53 or 11/93. Otherwise, your first two CD slots would already be full. ;-) One thing that has always made me a little paranoid about the RLV12 is the heatsink for the TO-5 transistor. It's very tall, and it sits VERY close to the boards above it. Be careful if you install the RLV12 underneath any dual boards. A little bit of warpage, and. . . T ________________________________________________________________________ More new features than ever. Check out the new AIM(R) Mail ! - http://webmail.aim.com

18 years, 1 month

PDP-8 "Introduction to Programming"

by ajp166＠bellatlantic.net

> >Subject: Re: PDP-8 "Introduction to Programming" > From: Alec McKenzie <alec at mckenzie.me.uk> > Date: Thu, 21 Feb 2008 14:16:59 +0000 > To: "General Discussion: On-Topic Posts Only" <cctech at classiccmp.org> > >Symmes, Dave wrote: >> I tripped across this email link on a Google search. >> I was the author of the original PDP-8 * "Introduction to >> Programming", published in either late 1968 or early 1969. I hired >> onto Digital straight out of college as a tech writer joining a >> department of four writers for the whole company. >> Almost 40 years later I am still with HP. > >Great to hear from you. >My copy of "Introduction to Programming" shows: > > First Printing, January 1969 > Second Printing, July 1969 > > Copyright ? 1968, 1969 > >I found it a most useful book, though I had been programming PDP-8's >since 1965, even before the first PDP-8's actually appeared. > >-- >Alec McKenzie >alec at mckenzie.me.uk I still have my copy and read it from time to time, the concepts are ageless and not married to any hardware. Allison

18 years, 1 month

Logic analyser EPROM's

by empiretheatre＠btconnect.com

Hi, What can I say... Thank you so much for sending the BIN files for the EPROM's, that was most kind of you. If you no longer have the 1631, then I take it that you do not need the grabbers. If you still require them, just send your address and I will post them off to you. I was given the HP1631D by a kind gentleman on the vintage radio forum. He had played around with it and re-written some of the EPROM's (bad move). I will program them up tonight and see what happens.... Thank you so much once again, if I can help you in any way in the future just let me know... Daniel.

18 years, 1 month

M88k MVME Lot for sale - any common interest

by mnusa2＠hotmail.com

Hi All, There is a big lot of Motorola 88000 boards for sale at eBay 300198415832. Unfortunatelly it is an USA only sale. Normally these go dirt cheap to resellers for spares with huge price tags (easily starting higher than 1k$). Is there anybody interested to share this deal and ship my part to Europe/Finland. I will pay pmy art and the shipping of course. I'm really interested in 4 processor modules, which seem quite rare (and I have none). BR, Matti _________________________________________________________________ Lataa 30 ILMAISTA hymi?t? Windows Live Messengeriisi! http://www.livemessenger-emoticons.com/fi-fi

18 years, 1 month

Fwd: [HersheyFreecycle] OFFER - older 24" Pen Plotter - Linglestown Area

by rtellason＠verizon.net

Dunno if anybody here would find this to be of interest, but maybe... This is a local freecycle list. I suppose pickup and maybe short-term storage (until it was shipped) would be possible, maybe. ---------- Forwarded Message ---------- Subject: [HersheyFreecycle] OFFER - older 24" Pen Plotter - Linglestown Area Date: Wednesday 20 February 2008 14:45 From: "tml615" <tml615 at yahoo.com> To: HersheyFreecycle at yahoogroups.com I have a Calcomp Pacesetter 24" pen plotter to offer. This is an older machine that plots on a large sheet using a pen. I received this from another FreeCycler. It works and comes with the manual, power cord, and one pen. It's a bit dusty and could use a good cleaning. Pens, drivers, and other parts are still available through online vendors. I have not been able to find a Windows XP driver for this plotter, but drivers for older versions of Windows (98 and older) are available on line. Pickup is near the intersection of Colonial & Linglestown Roads during normal business hours. _____________________________________________________ **** Proper Posting Format: **** OFFER [item name] [town name] PENDING [item name] TAKEN [item] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/HersheyFreecycle/ ------------------------------------------------------- -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin

18 years, 1 month

MS Visual C++ docs available

by jack.rubin＠ameritech.net

Three volume set of docs for MS Visual C++ v1.52 available for the cost of postage - relatively cheap via Media Mail, but the 3 vols total close to 11 lbs. Includes $15 rebate coupon with expiration date of 12/31/96 - proof that this "on-topic". No software included! Contact me directly if you're interested. Jack No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.20.8/1288 - Release Date: 2/19/2008 8:47 PM

18 years, 1 month

Apple // europlus

by roger.holmes＠microspot.co.uk

Any reason nobody picked this one up? Are Apple that hot on copyright infringement 20+ years on? Hi Mark, What country are you in? I have the disks, and a couple of Apple ][ europlus-es, though they have not been powered on for some years. I'm in Kent, England. Roger Holmes. On 18 Feb, 2008, at 18:00, cctalk-request at classiccmp.org wrote: > > Message: 8 > Date: Mon, 18 Feb 2008 10:12:33 +0000 > From: "Mark Firestone" <pdp11_70 at retrobbs.org> > Subject: Apple // europlus > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Message-ID: > <e23c5a2f0802180212g71f1ab93ife7088befb21d02 at mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > Hey guys, > > Someone gave me an Apple // europlus. I don't have any system > disks for it > at all. If I send someone a 5 1/4 inch disk or disks, would this > kind soul > send me a DOS 3.3 system master disk? > > Now if I could get that together, and find a super serial card, I > could > transfer software of disk images to it. > > Take Care, > > Mark >

18 years, 1 month

With all the other crud going on on ebay. . .

by tiggerlasv＠aim.com

Don't forget that, after an auction closes, there is a small window of time where the auction isn't searchable. I've had this happen many times; I went to find an auction; realized it must have closed, and then tried to search it in completed items, but could not locate it. Going back to internet-exploiter "history", I was able to go directly to the auction that I was looking for. . . As for the IMSAI -- I noticed one a few days ago that was up in the $2000's . . . was that the one you were looking for? http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220199733423 T ________________________________________________________________________ More new features than ever. Check out the new AIM(R) Mail ! - http://webmail.aim.com

18 years, 1 month

With all the other crud going on on ebay...

by wh.sudbrink＠verizon.net

what's with the disappearing auctions? The last couple of IMSAI and altair auctions were "removed" almost immediately upon completion. Does anybody know what the final price on the altair 680 with the riser board and memory expansion was? What about the IMSAI that was over $5000 with over a day left? No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.20.8/1288 - Release Date: 2/19/2008 8:47 PM

18 years, 1 month

TU10 tape drive restoration

by djg＠pdp8.net

>I have not looked into it, but if the tacho is producing a slightly too >slow or fast signal, because of the not perfect diameter, would there >not be a trim point to adjust an amplifier that drives the reel motors? > Yes their is. Your supposed to use the special skew tape to set it but setting it with a written tape probably will get it close enough. >I measured 3 of mine and there all over place. > Thanks. .015 difference probably isn't that significant. I'll try 1.83. >>Vacuum switches >This is the biggest problem with the TU10. But we've repaired them >ourself. > How long does this last? I got 4 new switches so I'll try this for the other 4. I like saving money. >>Blower >It is noisy, just like an old vacuum cleaner. > I expected the vacuum noise when running. What I was referring to was more of a grinding/scraping noise when turned by hand. >Do you plan to keep some type of online log on your web site? > There are a lot of things I plan to do. Hopefully this weekend I will actually create a page for it. At minimum I will docuement what I repaired and how. This will be the most complex restoration I have had to do. I'll post when I have something up.

18 years, 1 month

Logic Analyzer pods Re: HP LA Inverse Assemblers for classic microprocessors

by empiretheatre＠btconnect.com

Hi Steve, I don't know if you are still after some of these, but I may be able to help. I am after a favour though myself... I have an HP1631D but it has an EPROM fault. I am looking for someone who can copy the 8 EPROM's from another 1631D and send me the files. I could in return send about 16 or so grabbers. Daniel.

18 years, 1 month

Bubble memory devices

by ajp166＠bellatlantic.net

> >Subject: Re: Bubble memory devices > From: "Chuck Guzis" <cclist at sydex.com> > Date: Tue, 19 Feb 2008 13:44:53 -0800 > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > >A bit of curiosity on my part... > >If one wanted to replace a whole bubble memory card (i.e. complete >with support chips and decoders), would MRAM or FRAM be considered a >suitable substitute? It'd be one heckuva lot faster and drink less >power. Yes and no. yes you can use ram (or flash) as "disk" but the bubble system was addressed and generally run like a FDC with a command-status register and a data register. To have ram look like that you's need some controller and/or hardware. IT would also impact software that was designed to talk to it. Bubble was not RAM is was block accessable storage. >In the same vein, how about MRAM as a core memory substitute? Yes, it's been done. I had an 8E with a ram card, It stayed with the machine when I passed to to someone else. Also PDP-11s (early) could ahve ram or core and I ahve a 16k core stack for a Qbus LSI-11. Allison >Cheers, >Chuck > >

18 years, 1 month

The Apricot Xen

by ball.of.john＠gmail.com

Second to my Personal Iris 4D/20, the Apricot Xen has to be one of the most memorable systems I ever saw when I grew up. I can still vividly remember when my dad had them in his office and whenever I was there I would either bolt for the 4D/20 (They cared so much for the system that they let a five year-old play with it but on the other hand they did give it to me two years ago for nothing. :D) or the Xen that was right next to it. If memory recalls it had the trackball mouse as well as the 3 1/4" floppy drive and a hard drive and best of all it had that keyboard with the LCD panel and the programmable buttons. Sad to say they vanished all one day and since then (a little over ten years) I have been trying to find another Xen for myself. It seems it is not an easy task. Not only were Apricot systems not really liked here in North America but whenever I do manage to find a Xen it is ALWAYS missing either the keyboard or the mouse...or both and don't get me started with the monitor or the power supply. I can never seen to find one. Now that I own a logitech G15 keyboard and have it on my high-spec system I am now even more determined to find a Xen so I can mess around with its LCD panel. Does anyone have one with at least the keyboard and trackball mouse? Since words really can't describe this system, here's info on the system. http://www.old-computers.com/museum/computer.asp?c=501&st=1 John.

18 years, 1 month

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test-drb