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

by dhquebbeman＠theestopinalgroup.com

> If I remember correctly, there was a machine code program > printed once to play "music" with a ZX80 using this method! Older. Dr. Dobb's Journal, Issue #2... 8080 code, played Daisy and something else, modulating the S-100 INT signal. -dq

24 years, 6 months

3
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Anyone interested in a modem-design book?

by dpeschel＠eskimo.com

The local Barnes and Noble has one copy of this book: The Theory and Practice of Modem Design John A.C. Bingham Format: Hardcover, 1st ed., 480pp. ISBN: 0471851086 Publisher: Wiley, John & Sons, Incorporated Pub. Date: November 1990 It's not cheap ($160) but it looked reasonably meaty and I doubt it's easy to find. If anyone wants it, let me know. -- Derek

24 years, 6 months

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IBM 3274-61C controller

by rhblakeman＠kih.net

Well after some searching I find that this monster is a "controller" (I guess a terminal or network controller). Anyway I'm taking offers (shipping would be added to the offer unless you pick up in KY) for it - condition (other than good general external condition) is unknown, haven't even put a powr cord to it yet.

24 years, 6 months

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overclocking older processors

by mcguire＠neurotica.com

I was just reminded of when I overclocked an F11 chipset on a PDP-11/23 (KDF11-A) to 18MHz. It seems to me that it might be possible to overclock the 78032 on a KA630. Anybody ever done that? -Dave -- Dave McGuire St. Petersburg, FL

24 years, 6 months

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Ergo KB

by dhquebbeman＠theestopinalgroup.com

> Chris- > > Whew, sorry I forgot about you, with the list > being down, the depression nuked my recall. Oops! Sorry, meant to press the "private send" button... again... -dq

24 years, 6 months

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8" drives and PSUs.

by ard＠p850ug1.demon.co.uk

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24 years, 6 months

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Remington Rand 409 (this already has been posted!)

by ae＠alum.mit.edu

I am helping to gather original documents and/or artifacts concerning the Remington Rand 409-series computers for the Remington Rand 409-series museum being set up in Rowayton, CT. The models of interest are the 409-2 and the 409-2R. These are tube, punch-card, and programming panel machines >from the 1950s. We are interested in documenting the location of all surviving artifacts, but also would like to acquire particularly interesting items by donation or purchase. We are looking specifically for anything related to the programming of these machines, such as the programming panels, programming manuals, or the programming jumper wires. Photographs or drawings of programming panels (originals or reproduced in third-party publications), with or without programs wired on them, also would be of interest. If you have any of the above, or have more general items such as Remington Rand brand computer tubes or punch cards, whether or not you wish to sell or donate them, please e-mail me at: egendorf(a)mit.edu. Thanks.

24 years, 6 months

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11/44 power problem... (Oh, not again...)

by mcguire＠neurotica.com

On December 9, Zach Malone wrote: > > Respectfully suggest, use your kid sister to probe the voltage > points. > > Waiting for the inevitable McGuire "is she cute?". I try to reserve that for the rescue list...less "offendable" crowd over there. ;) -Dave -- Dave McGuire St. Petersburg, FL

24 years, 6 months

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Ergo KB

by dhquebbeman＠theestopinalgroup.com

Chris- Whew, sorry I forgot about you, with the list being down, the depression nuked my recall. The S&H looks like $5, so $30 will take it. You can send those government agents with my funds to: The Estopinal Group attn: Doug Quebbeman 903 Spring Street Jeffersonville, IN 47130 Again, sorry about that! Regards, -doug q

24 years, 6 months

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11/44 power problem... (Oh, not again...)

by DSEAGRAV＠toad.xkl.com

Same machine, new problem. ^_^ Whilst out in the garage playing with the 44 (which I still don't have an OS for...), my kid sister and one of her friends come out to the garage to smoke. (They're not allowed to smoke in the house.) Anyway, while the 44 is running, her friend says, "Wow, that's loud!", to which Monica replies "This one's louder!" and turns on the KS10... You know what's coming. And we had christmas tree packages and such all over the garage, too, so navigating the garage in the dark was real fun... (For those who didn't see it coming, the garage breaker went...) Anyway, after resetting the breaker, waiting for the VAX to reboot, checking that the KS10 was still in working order (I wouldn't be mailing if the KS10 was broken. I'd be busy burying my sister. ^_^) and putting back all the boxes I stepped on or knocked over, it was discovered that the 11/44 no longer powered on. The power control lights are on, the RX02 and SCSI disks inside the case work, but the BA11 (Is that the right part?) will not turn on. When you turn the switch on the front panel, nothing happens. No click, no fans, nothing. The breaker on the back of the BA11 did not trip. I turned it off and back on, nothing happened. I ran the AC power checks in the manual and nothing happened. I checked the front-panel wiring was still connected, it was. I pulled and reseated the front-panel control board in the UNIBUS. Nada. It looks like it should be working, it doesn't smell burnt, and I opened the top of the BA11 power supply and looked inside, and it looks really scary (what, with the THIS VOLTAGE WILL KILL YOU stickers and wires thick as my fingers and whatnot...) but it doesn't look burnt. Is there a hidden switch or fuse or something in there? That's what it looks like... Failing that, someone got directions for checking out an 11/44 power supply? -------

24 years, 6 months

4
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iPDS questions

by mythtech＠Mac.com

>> There was an optional second processor board that you could install >> and it became a true dual processor machine. You could switch >> between the two processors with a hot key. Both processors could be >> independently compiling, editing, debugging, etc. > > Oh now THAT is cool. :-) > > Anybody know of any other systems to implement this sort of of >functionality? The same concept is used for the Mac's and their PC cards. The Intel chip is placed on a card, and it runs independant of the mac (but shares some features like drive controller, stuff like that). You swap between them with a hot key, and you can have things running on each (ie: start something heavy on the Mac, swap to windows/dos/whatever OS you are running, it is a true Intel compatible setup, and run things there.) Swap between as much as you want, each will continue to run, being blissfully unaware the other is there. Connection between the two is nice, you can have shared folders between them. The Mac will view it as a folder, the PC will view it as an additionally available drive. And you can cut and paste between the two. Very nice setup, too bad Apple abondoned them, and stopped upgrading the driver software, so they don't work too well past System 7.6.1 (they will work under OS 8 and 9, but some problems can arise) -chris <http://www.mythtech.net>

24 years, 6 months

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iPDS questions

by mcguire＠neurotica.com

On December 9, Zane H. Healy wrote: > > Anybody know of any other systems to implement this sort of of > >functionality? > > The DEC Rainbow has two different CPU's in it, however, I don't know if you > can run different stuff on each one at the same time. IIRC, it has a Z80 > and a 8086 so you can run different software (sort of like the > Commodore 128 running Commodore or CP/M software). I thought that was an 8088...but as far as I'm aware you can't run them independently. -Dave -- Dave McGuire St. Petersburg, FL

24 years, 6 months

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PDP 11/34 Console & cards

by fcharp＠rogers.com

All, Well, that was quick. The system is spoken for. Thanks to all for their interest. Regarding the DEC service CD: in fact, there are 2 CDs. They are full of manuals and service stuff, BUT they cover more recent equipment than the PDP. The last dates on the CD are 1994, which says that there is a lot of VAX-related material on the discs, but not much with regards to PDP. My apologies. Anyway, I already had a couple of requests for them, so I guess I'll be giving the ol'burner a run for its money. Cheers, Frederic Charpentier

24 years, 6 months

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Bubble sorts have their place

by ard＠p850ug1.demon.co.uk

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24 years, 6 months

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History of Computing exam question

by ard＠p850ug1.demon.co.uk

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24 years, 6 months

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iPDS questions

by mcguire＠neurotica.com

On December 9, Dave Mabry wrote: > There was an optional second processor board that you could install > and it became a true dual processor machine. You could switch > between the two processors with a hot key. Both processors could be > independently compiling, editing, debugging, etc. Oh now THAT is cool. :-) Anybody know of any other systems to implement this sort of of functionality? -Dave -- Dave McGuire St. Petersburg, FL

24 years, 6 months

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11/44 power problem... (Oh, not again...)

by dhquebbeman＠theestopinalgroup.com

> Is there a hidden switch or fuse or something in there? That's what it looks > like... Failing that, someone got directions for checking out an 11/44 > power supply? Apples and Oranges, but Primes have an A/C distribution box in the back that the big round A/C plug goes into... this whole box removes from the chassis, and when disassembled, reveals a fuse inside along with something that looks like an EMI filter. The fuse is replaceable without soldering... ...but this is a Prime, not a PDP-11/44, but I'd look for something similar... -dq

24 years, 6 months

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Seeking info and parts for MicroVax II BA123

by tothwolf＠concentric.net

Well, after all the talk about a MicroVax II BA123 on the list lately, I managed to unbury mine. It appears to be all original except for 2 hard drives that may have been added as an upgrade. All the boards match up with the DEC sticker with handwritten board numbers. It has the standard cpu board, what seems to be a 2mb ram board, a serial interface board w/ 8 ports, and the standard scsi and tape interface boards. It also has some sort of loopback board in the upper 3rd slot. Does anyone have a link to reference info on these boards? I'd like to find a pair of 8mb ram boards and a network interface for this thing, so I can put it back in service for open source software development/testing. I don't know the part numbers for these boards, so any extra info would be great. I'm also looking for the door that covers the front control panel, as this machine seems to have lost its door at some point before I rescued it. If anyone has any of these parts laying around, please drop me an email. I'm more then willing to pay shipping. I really don't think I have much of anything anyone here would want as a trade, so I'm willing to pay for the parts too if required. Another interesting tidbit about this box, it still has its inventory sticker from NASA, and it orig cost good old uncle sam $22,000+. Anyone else wonder why they didn't have it outfitted with a network interface of somesort, especially with it costing that much already? -Toth

24 years, 6 months

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Stacking Apple ][ stuff

by pete＠dunnington.u-net.com

On Dec 8, 19:44, Ethan Dicks wrote: > --- John Lawson <jpl15(a)panix.com> wrote: > > Aluminium = non-magnetic Iron = magnetic in terms of marginal > > shielding from external fields. > > Do para-magnetic cows go "mu"? Oh, no, the list has been back up for an hour and already we have bad puns :-) Well done, Jay! I saw the archive come back a while ago, and I wondered when you'd get the list done. -- Pete Peter Turnbull Network Manager University of York

24 years, 6 months

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Apple Floppy Drives (was: More Apple Pimpers)

by erd_6502＠yahoo.com

--- "Fred Cisin (XenoSoft)" <cisin(a)xenosoft.com> wrote: > Here's what you need to do to get reliable results from Apple drives: > > > And I am probably a good test of real world abuse to the Apple Drive ][ > > drives, as I was just a wee child, and I didn't follow any rules that > > I probably should have... My former boss at Software Productions (we wrote kiddie software for home computers under the Reader's Digest label) put a story in an early version of the docs of how he fired up his Apple ][ to run CP/M and the disk drive made odd noises... he took it in for service and the tech extracted fragments of a Peanut Butter & Jelly sandwich. Seems his kids were playing games and eating PB&J and decided the computer must be hungry, too... It's not just oatmeal in the VCR... -ethan __________________________________________________ Do You Yahoo!? Send your FREE holiday greetings online! http://greetings.yahoo.com

24 years, 6 months

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iPDS questions

by Innfogra＠aol.com

In a message dated 12/8/01 7:23:23 PM Pacific Standard Time, healyzh(a)aracnet.com writes: > I just found a working iPDS system, complete > with documentation and some software. Unfortunately I don't think a lot of > it is still readable. I did get the system to boot and pass all > diagnostics. > > I know nothing about these beasties, from looking at the doc's it's > obviously i8085 based with 64k RAM. It's got a single 5 1/4" floppy, and > it's in a case slightly smaller than a Kaypro II. In the area behind the > CRT is a storage area for two pods that each handle two different sizes of > PROMs, these plug into a hole in the right side of the case. > Hi Zane; Nice find. I just dug out a couple iPDSs out of my storage locker that I am getting ready for sale. I may be interested in some copies of the documentation. I also have some disks but have not checked their condition. You are right that they are 8085 systems. Besides EPROM programmers there was also an EMV 51 emulator pod for IIRC debugging the 8051. There are also external floppy disk drives that daisy chain to it. It also ran CPM. I believe Fred's Xenocopy program will copy diskettes for it. IIRC they are standard 360K DSDD drives. Paxton Astoria, OR

24 years, 6 months

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Houston Classic Computers was {Off-Topic: Re: Anyone have a MicroVax II in a BA123 available?}

by msell＠ontimesupport.com

I don't know of a formal (or informal....) classic computer user group in Houston, but I would love to participate in one. I know that there are several of us in Houston. I met with David and Mitch recently; very nice people. David has a real neat collection of older "personal" computers and some other Unix-class boxen as well. Obviously there are more of us, an informal gathering would be neat. - Matt >Now, to change the subject of this thread, does anyone know of any >"classic computer" user groups in the Houston area? > >-Toth Matthew Sell Programmer On Time Support, Inc. www.ontimesupport.com (281) 296-6066 Join the Metrology Software discussion group METLIST! http://www.ontimesupport.com/cgi-bin/mojo/mojo.cgi "One World, One Web, One Program" - Microsoft Promotional Ad "Ein Volk, Ein Reich, Ein Fuhrer" - Adolf Hitler Many thanks for this tagline to a fellow RGVAC'er...

24 years, 6 months

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Stacking Apple ][ stuff

by mcguire＠neurotica.com

On December 8, Ethan Dicks wrote: > > Aluminium = non-magnetic Iron = magnetic in terms of marginal > > shielding from external fields. > > Do para-magnetic cows go "mu"? You are a sick, sick man. -Dave -- Dave McGuire St. Petersburg, FL

24 years, 6 months

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Stacking Apple ][ stuff

by erd_6502＠yahoo.com

--- John Lawson <jpl15(a)panix.com> wrote: > Aluminium = non-magnetic Iron = magnetic in terms of marginal > shielding from external fields. Do para-magnetic cows go "mu"? -ethan __________________________________________________ Do You Yahoo!? Send your FREE holiday greetings online! http://greetings.yahoo.com

24 years, 6 months

1
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Anyone parting with a Wyse 60

by mythtech＠Mac.com

Does anyone have a Wyse 60 they want to part with on the cheap? (working only please... I have a dead one thanks) I tried buying one on ebay a few times, and each time, either they were in horrible condition, or went above my price threshold, or I got "ebayed" at the last second by someone outbidding me. I would prefer one in the NJ area that I can drive and pick up as cost is my #1 issue, but if total cost (buy + shipping) isn't too bad, I will accept shipped ones. I might have stuff to trade, but most everything I have that is available to be parted with is PC related, which A: isn't as popular here, and B: isn't as hard to get as other systems. I do have a C64 or two (don't know functional condition), maybe some other stuff (like these Zebra 2500 manuals I keep tripping on) If you have something in mind, let me know, I will see if I have it. Thanks -chris <http://www.mythtech.net>

24 years, 6 months

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1961 build-your-own computer book

by mranalog＠attbi.com

I just recently found a cute little computer book called "I can learn about Calculators and Computers" by Raymond G. Kenyon, Harper & Brothers, 1961 112 pages. The chapters are entitled: How Early Man Counted and Computed The Story of Modern Computers Construct Your Own Calculators and Computers - - Oriental Abacus - John Napier's Bones - Slide Rules - "Stepped-Wheel" Calculator - Digital Computer - Analog Computer Materials used consist of wood, wire, D-cell batteries, flashlight bulbs, potentiometers, etc. Remember wooden cigar boxes? Regards, --Doug ========================================= Doug Coward @ home in Poulsbo, WA Analog Computer Online Museum and History Center http://www.best.com/~dcoward/analog =========================================

24 years, 6 months

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testing

by mcguire＠neurotica.com

On December 8, Peter C. Wallace wrote: > > testing > > testing 1..2..3... KA410-A V1.2 F_..E...D...C...B...A...9...8...7...6...5...4_..3_..2_..1_.. -- Dave McGuire St. Petersburg, FL

24 years, 6 months

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test number 2

by anon2048＠hotmail.com

test number 2 _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp

24 years, 6 months

1
0
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testing

by root＠ns2.ezwind.net

testing

24 years, 6 months

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Is it a Lisa or Mac XL?!

by dhquebbeman＠theestopinalgroup.com

> Scrapping them off the books for tax purposes, in all likelyhood. We > used to have to physically destroy our COMBOARDs before we could write > them off. If we were ever audited and happened to have product that > was logged as scrap, but hadn't been, we would have been in a world > of hurt from either the County Tax officials or perhaps the IRS. > > It sucks, but if you scrap hardware, you have to render it useless. IMHO, all you need to do is ensure there remains no evidence to the contrary... admittedly, it might get very difficult to have 10,000 units disappear with a wink and a handshake... -dq

24 years, 6 months

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Macintosh

by vance＠ikickass.org

Could someone tell me what the last version of Macintosh System to run on 68K machines was? Where can I get a copy? Peace... Sridhar

24 years, 6 months

3
2
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Badtrans

by philpem＠bigfoot.com

Hi All, I've noticed that a few of you have been chatting about Badtrans - according to Symantec, if you drop the underscore from the "From:" address, you should end up with the user's actual e-mail address - if the virus chose to use the actual address... I've picked apart the message source and what it does is quite sneaky - it uses an IFRAME to load the virus and also uses MIME-headers-within-MIME-headers... A few of the regulars on alt.comp.virus might want to elaborate... It's a crafty little bugger - it even installs a keystroke logging trojan... Anyone remember the so-called "Sexyfun" or "Spirale" virus (it's real name was Hybris) - it came in an e-mail from hahaha @ sexyfun.net and could update itself over the web with new "plugins"... One of which displays a _huge_ hypnotic spiral on-screen... Sophos put a screenshot of it on their website (www.sophos.com). Later. -- Phil. philpem(a)bigfoot.com http://www.philpem.f9.co.uk/

24 years, 6 months

2
1
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Sun Optical mouse pad anyone?

by mcguire＠neurotica.com

On December 1, jkunz(a)unixag-kl.fh-kl.de wrote: > > Type 3 definitely requires a different pad from type 4... > Then you have other type 3 rodents than I. Mine are identical to the > type 4 mice, only with an other connector. It's certainly possible that I'm thinking of the Type 2...this was a long time ago and I was running a couple of Sun2-120 boxes at the time. -Dave -- Dave McGuire St. Petersburg, FL

24 years, 6 months

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1
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Need "PC Mouse" driver for PCjr ..

by mbbrutman＠magnaspeed.net

Chris (mythtech(a)mac.com) spake: >>The mouse looks to be a slightly >>modified version of the "PC Mouse". The neat thing is that it is an >>optical mouse. [:-)] >I had an optical mouse way back when with my Mac Plus... I bought it as >a replacement for a broken mouse. I think it was made by A+ >At the time, I hated it, you needed a special mouse pad for it to work, >and it wasn't as accurate as the Mac Plus mouse, which made it even >harder to draw. >Just one of those things that I found interesting now that optical mice >are all the rage. Actually, I don't like the old style optical mice at all. I like this one because I think the older optical mice are hard to find. And on top of it, this was manufactured for use on the Jr - it wasn't just a run-of-the-mill PC mouse, it had two funny connectors specific to the Jr. (One for serial, and one to take power off the lightpen port.) All of that makes it special. My original machine had an MS bus mouse with a roller. Quite a different animal to use. The new optical mice are only vaguely related to the old ones. They don't need the pad or anything. I haven't used one, so I don't know if they are any more usable.

24 years, 6 months

2
1
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Shugart hard disk info

by mcguire＠neurotica.com

On December 7, UberTechnoid(a)home.com wrote: > As I recall, the q2020 has the same geometry as the Seagate st225 > (620/4/17).?? I think that's 614 cylinders for the ST225. Oh GOD why do I remember that? Can't I recycle those brain cells? -Dave -- Dave McGuire St. Petersburg, FL

24 years, 6 months

2
1
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Terminal finds?

by LFessen106＠aol.com

Does anyone on the list know where I might be able to find a few (10-20) used but in good shape dumb terminals? I need some with a pc-style kb and wyse 60 emulation. -Linc Fessenden In The Beginning there was nothing, which exploded - Yeah right... Calculating in binary code is as easy as 01,10,11.

24 years, 7 months

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Anyone have a MicroVax II in a BA123 available?

by cmcmanis＠mcmanis.com

I'm in Sunnyvale, and would part with one. --Chuck

24 years, 7 months

3
6
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Dataproducts printer inteface

by steve＠airborn.com.au

Sorry for the repost... but has anyone heard of the (old) Dataproducts printer inteface? It was also called the Line printer interface, and was used on other Brands besides just Dataproducts. Basically I know it uses differential signals - otherwise similar to centronics - but I would like to find out some details. I have the Pinout: http://www.hardwarebook.net/connector/parallel/dataproductsdsub50.html I would really like to find a description of the "Demand" signal and the polarity of "Strobe" and "OnLine" I would like to know the levels (I presume they are TTL) If anyone can help me out, perhaps I can respond in kind by giving them the final result - a circuit for a Centronics-->Dataproducts interface. steve(a)airborn.com.au

24 years, 7 months

2
1
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Parting out on eBay

by mcguire＠neurotica.com

On December 4, Tony Eros wrote: > Last month someone had an Industrial-8 two rack system with TU56, RK05, > high-speed paper tape reader/punch listed on eBay. $1000 was evidently not > enough, because now he appears to be selling off the bits. There's > currently a listing for "PDP 8 Industrial DEC chassis and front panel" with > about three days to go. > > Kind of a bummer. Lynch mob time. -Dave -- Dave McGuire St. Petersburg, FL

24 years, 7 months

2
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More E-Bay Insanity?

by mcguire＠neurotica.com

On December 4, Tony Duell wrote: > Presumably the number of people still using 8" drives who don't know how > to clean the heads 'by hand' is even less than the number of people using > 5.25" drives who don't know that. Which means that apart from collectors, > there may be very few people who actaully need an 8" cleaning kit... ...which further suggests that, of the people who would want an 8" cleaning kit, a higher percentage of them are collectors. Get those 8" kits on eBay, and make a fortune! ;) [sorry, couldn't resist..] Say, anybody got a spare top lid for a 10.5" 11/34 CPU chassis? I could actually use two if anybody has a pile o' parts.. -Dave -- Dave McGuire St. Petersburg, FL

24 years, 7 months

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More E-Bay Insanity?

by csmith＠amdocs.com

> -----Original Message----- > From: Dave McGuire [mailto:mcguire@neurotica.com] > Value is in the eye of the beholder, man. Why is it automatically > "insane" when someone else views omething as being more valuable than > we do? > The resale value of the stuff we hack on is going up, and we have to > learn to deal with it. It has been for some time. People are buying > it at these prices, and it's not just one or two people. Let them > spend their money...if they're happy with their purchase, what's wrong > with it? > Further, one mustn't lose sight of the fact that different things > are more readily available in different geographic areas than in > others. Just because there are fifty AppleIIs at the corner yard sale > in your neighborhood doesn't mean there are fifty of them at EVERY > corner yard sale. ... ok, I understand this perfectly (believe me!) but this is a head cleaning kit, and anyone who's still got a 5.25" disk likely could take it apart and clean the head without the kit. Regards, Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '

24 years, 7 months

3
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More E-Bay Insanity?

by pete＠dunnington.u-net.com

On Dec 3, 15:38, Douglas Quebbeman wrote: > > Have 5.25 inch floppy drive cleaning kits > become unobtainium, or only for the clueless: > > http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1305651479 Wow, I wonder what my 8" ones are worth ;-) -- Pete Peter Turnbull Network Manager University of York

24 years, 7 months

2
1
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TK50-GA external SCSI tape unit + Microvax 3100 Desktop

by pete＠dunnington.u-net.com

On Dec 4, 0:39, Carlini, Antonio wrote: > > pete(a)dunnington.u-net.com wrote: > > > >> (Oh, what's the 50 pin HD-DB type connector? line-printer?) > > > >Good question :-) > > After my earlier miscounting I'd better check > carefully :-0 but if this is labelled B1 (and > there is another one labelled B2 on *some* > MicroVAX 3100 Model 20s) and it is three > rows of pins ... then it is a synchronous > communications connector. The same > connector was used on several other > synch comms options (DEMSA, DECnis, > DSV11, DSB32, DMB32 and DSF32). > The interface presented (X.21, V.35, > RS422, RS423) was determined by the > stub cable you plugged in. Thanks for that -- that's helpful. I might even have a use for it :-) -- Pete Peter Turnbull Network Manager University of York

24 years, 7 months

1
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Houston Classic Computers was {Off-Topic: Re: Anyone have a MicroVax II in a BA123 available?}

by csmith＠amdocs.com

> -----Original Message----- > From: David Williams [mailto:dlw@trailingedge.com] > I too would be interested in getting together with other > collectors in > the Houston area. Always like to meet others in the area, visit or > hit collecting spots. I know there are a few more on the list. Any > others interested? Houston's starting to sound like a cool place to live ;) In all seriousness, though, maybe local user groups or something more loosely knit are a good idea. Regards, Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '

24 years, 7 months

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Parting out on eBay

by dhquebbeman＠theestopinalgroup.com

> On December 4, Tony Eros wrote: > > Last month someone had an Industrial-8 two rack system with TU56, RK05, > > high-speed paper tape reader/punch listed on eBay. $1000 was evidently not > > enough, because now he appears to be selling off the bits. There's > > currently a listing for "PDP 8 Industrial DEC chassis and front panel" with > > about three days to go. > > > > Kind of a bummer. > > Lynch mob time. OTOH, I know someone hoping to pick up the chassis/front panel (not me)... -dq

24 years, 7 months

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VERY LONG: Latest S-100 Haul

by mythtech＠Mac.com

>Thanks to a VERY generous man, located about an hour's drive from me, I have >a boatload of CompuPro S-100 stuff, 8" floppy drives, manuals, software, >etc. <snip> YIKES Batman... Nice score! -chris <http://www.mythtech.net>

24 years, 7 months

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Parting out on eBay

by csmith＠amdocs.com

> -----Original Message----- > From: Dave McGuire [mailto:mcguire@neurotica.com] > On December 4, Tony Eros wrote: > > Last month someone had an Industrial-8 two rack system with > TU56, RK05, > > high-speed paper tape reader/punch listed on eBay. $1000 > was evidently not > > enough, because now he appears to be selling off the bits. There's > > currently a listing for "PDP 8 Industrial DEC chassis and > front panel" with > > about three days to go. > > Kind of a bummer. > Lynch mob time. Exactly what I was thinking. That really offends me. Regards, Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '

24 years, 7 months

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Bubble sorts have their place (was: FLUKE?

by csmith＠amdocs.com

> -----Original Message----- > From: Fred Cisin (XenoSoft) [mailto:cisin@xenosoft.com] > And I've seen bubble sorts used when they were inappropriate, or worse > yet, a bubble sort going from left to right, when right to > left was called > for - that creates the worst case scenario that gives a > bubble sort its > bad reputation. Back to the description of the bubble sort that Wirth had in his book (the book is "algorighms + data structures = programs," for the curious), he suggests modifications to a bubble sort: Always remember the position of the last switch that you've made. You can start/end here next time. (A similar thing was mentioned in a previous mail by somebody) Alternate the order of the sort going right-to-left one pass and left-to-right the next. That takes advantage of the fact that a number that's incredibly far out of place will tend to move further if you're sorting towards its proper place. (In other words, it's as you say, but assuming that we don't know the order of the data, so the sort can be generic and still be more efficient) Regards, Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '

24 years, 7 months

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PDP-8/E bulbs

by mcguire＠neurotica.com

On December 2, Zane H. Healy wrote: > I'm making progress on the PDP-8/E I got this last week. The powersupply > checks out once the Front Panel is plugged in, and thanks to all the spare > lightbulbs I've got all the burnt out bulbs replaced. Unfortunatly I'm now > down to two spares which my -8/m could probably use, the -8/e had nearly > half it's bulbs out. This brings up the question, how hard is it to get > replacement bulbs? I thought all 8/M systems had LED front panels. At least every one I've seen has. Not sure where to find replacements. Newark Electronics has a nice (but expensive) selection of lamps. Also you might want to try Gilway Technical Lamp...if you can't find them online, let me know and I'll dig up a catalog. -Dave -- Dave McGuire St. Petersburg, FL

24 years, 7 months

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FLUKE?

by csmith＠amdocs.com

> -----Original Message----- > From: pete(a)dunnington.u-net.com [mailto:pete@dunnington.u-net.com] > You're supposed to stop one position shorter each time, > because by the end > of the sweep, the largest (or smallest, depending on which > way you do the > comparison-and-swap) number has fallen to the bottom (end) of > the array. > It makes a big difference to the time it takes. You're right. It would. Wirth had a better example in one of his books, but I didn't want to type it all in. ;) Regards, Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '

24 years, 7 months

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