test-drb December 2001

test-drb@ccmp.vtda.org

243 participants
1096 discussions

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

23 years

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

23 years

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

23 years

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

23 years

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

23 years

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...

23 years

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

23 years

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

23 years

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>

23 years

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 =========================================

23 years

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test-drb December 2001