test-drb February 2022

test-drb@ccmp.vtda.org

99 participants
82 discussions

by cz＠alembic.crystel.com

Hey all! While going through floppies I found these and was wondering what they were. Only clue in Google was someone asking in 1997 same thing. BL-T540B-M1 CZUFDB1 USER TESTS BL-T541B-M1 CZXD1B1 FIELD SERVICE TESTS 1 BL-T542B-MC CZXD2B0 FIELD SERVICE TESTS 2 BL-T565B-MC CZXD3B0 FIELD SERVICE TESTS 3 BL-T583B-MC CZXD4B0 FIELD SERVICE TESTS 4 Any ideas? The first one does not have a write protect tab, the others do. There is also one other disk I found CZMX4E0 Micro 11 Maint RX50 4 On this one the write protect flag was torn off (was on from factory and removed) C

3 years, 1 month

HP 2100S Power Supply Disassembly Tips

by derschjo＠gmail.com

Hey all -- I've had this HP 2100S mini sitting on the bench for a bit, waiting, and I wanted to go through the power supply and test/reform the capacitors this past weekend. The processor service docs cover getting the supply out (which is slightly cumbersome) and I have that step done. But neither the processor docs nor the power supply service docs seem to cover how one disassembles the supply itself. (Has a really thorough guide to how the thing works though, that I'm hoping I won't actually have to use anytime soon.) There are a lot of parts in this unit, and I'm not seeing a method to the madness. The capacitors are fairly easy to *get to* but actually removing them for testing / replacement seems to be another matter entirely. Anyone out there done this before and have any advice? Thanks! - Josh

3 years, 1 month

Red Hat Linux 7.2 for Alpha

by p.gebhardt＠ymail.com

Hi Ben, >? I can't seem to find this anymore.? I have seen a few mentions that there is a "wrapper" installer that is necessary to install 7.2 on an ES47/ES80 >machine, and I'm hoping that it was archived or mirrored some place... Back then in 2016, I also looked for these images for my ES80 machine on the HP site and tried to find ftp mirrors, but all I found were broken links. I would be happy, too, if anybody has a copy of these installation sets. Cheers, Pierre

3 years, 1 month

VCF Swap Meet in Wall, NJ Sat, Feb 26 - Vintage Computers, Amateur Radio, TV, Radio, other Tech

by jeffrey＠vcfed.org

*The vintage Computer Federation will be having their 3rd swap meet.* *Saturday, February 26, 2022* *8AM to 2PM* *ADDRESS*: *Indoor swap Meet* InfoAge Science and History Museums (Camp Evans) 2201 Marconi Road, Wall, NJ 07719 Buildings 9010-D, 9032-A, 9001 *GPS location*: Google Maps <https://goo.gl/maps/YiEnhJAtffHTnfn8A> *Satellite Map*: *Street Map*: *EMAIL*: swapmeet at vcfed.org *PHONE*: 732-722-5015 *Flyer:* 2022-VCF-Swap-Meet-Flyer <https://vcfed.org/wp/wp-content/uploads/2022/02/VCF_Swap_Meet_2_26_2022_LQ_…> *Website*: https://vcfed.org/wp/vcf-swap-meet/ *VENDOR COST* is per space. First space is $20, each additional space is $10. This time it is an *indoor* swap meet. *Bring your own table!* Table isn?t required, but recommended. A space is considered a 6 by 3 foot area (the general size of a table). *Vendor setup at 7AM.* *FREE GENERAL ADMISSION!* *SEND PAYMENT TO*: paypal at vcfed.org (FRIENDS AND FAMILY OPTION) Write in the note section: [your name] VCF Swap Meet 2/26/2022 Number of spaces: *Click HERE for Swap Meet Vendor Signup* <https://docs.google.com/forms/d/e/1FAIpQLSfplnIROL-TTJ3qNkIo45mTelGNY3QCaFi…> * Reservation doesn?t guarantee sales. * The Vintage Computer Federation is only providing a space, vendors must bring their own tables. * In case of inclement weather, money paid will be refunded. * All items that you bring must be taken with you. No items are to be left behind. * Bathrooms on site * Limited food and drink options available. The same info can be found here: https://vcfed.org/wp/vcf-swap?meet <https://vcfed.org/wp/vcf-swap-meet> *EMAIL*: swapmeet at vcfed.org *AFTER THE SWAP MEET, COME VISIT OUR VCF MUSEUM @ INFOAGE!* We are open from 12PM to 5PM: https://vcfed.org/wp/vcf-museum The Vintage Computer Federation Museum is located nearby the swap meet and is part of InfoAge Science and History museums. InfoAge and VCF Museums are open every Saturday, Sunday and Wednesday from 12PM to 5PM InfoAge museums: infoage.org.

3 years, 1 month

Red Hat Linux 7.2 for Alpha

by ben＠huntsmans.net

Hi guys- Is anyone aware of an archive or mirror of HP / Compaq's Red Hat Linux 7.2 for Alpha download site: ftp://ftp2.compaq.com/pub/linux/RedHat/7.2-alpha/release-isos/ And the update site: ftp://ftp2.compaq.com/pub/linux/RedHat/7.2-alpha/updates/ I can't seem to find this anymore. I have seen a few mentions that there is a "wrapper" installer that is necessary to install 7.2 on an ES47/ES80 machine, and I'm hoping that it was archived or mirrored some place... Thanks in advance! -Ben

3 years, 1 month

DECTape head problem

by go＠aerodesic.com

In debugging my DECtape interface lashup, I found that one of my head has two open windings.? Specifically, one channel has an open 'ground' with the other two lines apparently the full winding of the channel.? The second channel failing has no continuity between any of the three lines.? I have tested the other head and it has all the requisite continuity so I'm hoping I can at least get a single spindle running. Visual inspection of the head 'suggests' it might be caused by the age-old 'wire stress' of being captured within a polyester resin and then finally snapping due to internal stress.? I see lots of internal stress cracks on this head so I'm probably toast on this one. Are there documents on how the heads are made?? I.e. number of turns of number X wire; cap of X micros etc.? I'm not (yet) seriously entertaining the idea of rebuilding this head, but it looks pretty low tech.? These heads are Western Magnetic heads without a model number (only serial number 19976 - don't know the other head S/N as I haven't removed it yet.) And the look to be hand made... Has any ever attempted repair of one of these? -Gary

3 years, 1 month

Varian 620/L backplane netlist?

by mark.kahrs＠gmail.com

I realize this a rare bird indeed, but would anyone just happen to have a Varian 620/L backplane netlist hanging around? Unless I missed it, the schematics on bitsavers do *not* have it.

3 years, 1 month

AlphaServer ES47 partitioning

by ben＠huntsmans.net

Hey guys- Anyone on here know much about the Marvel boxes? I've had one for years but never had much time to fiddle with it. I'm looking at the partitioning features. In particular, the manual says: Hard partitions must be on 2P boundaries Tru64 only supports hard partitions However, I can confirm that you can definitely create a hard partition with a single CPU. This got me thinking, and I dug a little deeper into the MBM CLI. The manual seems to suggest that this is the case, but says that the operating system won't work correctly in that configuration. Anyone know why not? When you create a hard partition, you specify what type of subpartition the hard partition can contain. The manual says that only "soft" partitions are officially supported, but the CLI also allows you to create subpartitions of type "firm" and "semi-firm". Does anyone know what "firm" and "semi-firm" partitions do differently than soft partitions? And does Tru64 work with any of that, or is all of that OpenVMS-specific stuff? Also, on a side note, I don't suppose anyone here has a rail kit for an ES47 or ES80 they'd like to sell, or an I/O drawer... Many thanks in advance! -Ben

3 years, 2 months

More switchmode power supply grief - Cisco IGS router

by cctalk＠beyondthepale.ie

I have a Cisco IGS router which hasn't worked for a long time. When I was last using it several years ago, it occasionally crashed and restarted. This turned out to be due to a poor contact on a connection in the cable going from the output of the power supply to the main board. I cleaned the contact more than once but it was difficult to make it good enough to ensure reliability. When I switched it on more recently, it was completely dead, no LEDs, no fan noise, no anything. I put it in the naughty pile and it sat there for a few years before I got around to looking at it. Today I finally managed to check it out. The ceramic F4A mains input fuse beside the power switch on the back panel had blown. When I opened it up, I found a POWER-ONE MAP80-4000 power supply. The main chopper transistor labelled Q1 on the PCB is almost a dead short. It is a large plastic packaged FET mounted on a piece of aluminium which is in turn screwed to the case for heatsinking. Unfortunately, there are no markings on it so I have no idea what to replace it with :-( As Q1 is shorted across all three terminals, whatever drives it may be damaged too :-( After finding screw heads hidden under the label, I managed to extract the PCB from the case and found some corrosion underneath, possibly from leaking electrolytic capacitors :-( There are lots of data sheets available for this power supply on the web but they concentrate on the specifications for the unit and don't say anything about the components :-( There are also lots of people offering to sell power supplies like this for way more than I am interested in spending on this project :-( I could replace the power supply with a different one, however, I don't have anything to hand that will fit in the approx 5-6cm headroom :-( Anyone have any suggestions? Regards, Peter Coghlan.

3 years, 2 months

WTB: DEC VSXXX-AA Mouse or Compatible

by lists＠glitchwrks.com

All, I'm looking for a DEC VSXXX-AA "hockey puck" mouse or compatible for a VAXstation 3100. Thanks, Jonathan

3 years, 2 months

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test-drb February 2022