test-drb December 2002

test-drb@ccmp.vtda.org

250 participants
519 discussions

by dwightk.elvey＠amd.com

>From: "Philip Pemberton" <philpem(a)dsl.pipex.com> > >pete(a)dunnington.u-net.com wrote: >> On things like that, I often don't even try to rescue any suspect ICs >> or even passives, just cut them off close to the PCB with a very fine >> pair of sidecutters, and then desolder the stub of pin. >That's what I've been doing. I've been desoldering using "Soder-Wick" - I >got a small reel of it for 90p. > >> First thing is to make sure anything you remove is replaced with a >> good quality socket >I didn't have any decent sockets - I had to cut two Maplin "economy DIL >sockets" down to size, fitted two RAMs, then ran out of sockets. In order to >limit damage to the ICs due to heat, I gave them a quick blast of freeze >spray and then soldered them. Hi REAL BAD IDEA! This is just about the worst thing you can do. Most silicon IC's can take a lot of heat applied slowly. Thermal shock making a large range of temperature change is real rough on them and more likely to fracture the IC or cause the lead seals to fail. > >> and if necessary that you can repair any damaged >> tracks with stripped wirewrap wire or similar. >None of the tracks are stuffed, the pads seem to have come up because the >solder wick stuck to them and pulled them up, even though the wick was still >heated. This is why I never recommend using solder wick unless you are vary experienced at desoldering. You need to know the right size and the right touch of applying the heat with this material. I do 95% of my desoldering with a sucker and only the last special cases with wick. I have three different sizes of wick to select for each job. I use different heat ranges as well. > >> How adept are you >> with a soldering iron? >Six years of experience, three with a Maplin elcheapo, three with my Antex >XS25 (25 watt). Rework is not the same as soldering. Rework is a special talent. When you can remove a 25 pin D PC type D connector >from a 4 layer board with half of the pins connect to large internal traces, without damaging to board, you can consider yourself a reworker. You absolutely shouldn't be using an non-temperature controlled iron for rework. Dwight > >> Did you get the 2114s and Z80 I sent you? They should have arrived >> this morning. >Yup, they arrived this morning. Fitted them and the random, static garbage >has been replaced with scrolling garbage. Grr... >I replaced four out of the five 74LS367s too - no dice. The bloody thing is >still being stubborn. > >As for your offer to have a look at it, I might just take you up on it. I've >got a schematic for it (drawn by Bodo Wenzel) for a clone of the Ace, some >bits are different, 90% of it is the same though. > >Thanks. >-- >Phil. >philpem(a)dsl.pipex.com >http://www.philpem.dsl.pipex.com/ > >

23 years

SCSI 9-Track tape under VMS..?

by Antonio.Carlini＠riverstonenet.com

>With terminators on 1) the 2nd ports of the HP88780B and on the 2nd port of the KZSA I got nuthin' This, I guess, is how it is supposed to be connected. >However, when I pull the terminators from everything, I get: > >>> show scsi >SCSI Adaptor 0 (761300, SCSI ID 7) I assume you don't have the tape set up as ID 7? Things would get pretty upset if you did that! Do you have any other known good SCSI device that you can drop onto the KZQSA (on its own) to see verify that the KZQSA itself is good? A CD-ROM drive would be ideal but even a disk would do. Antonio

23 years

Looking for N* parts

by RCini＠congressfinancial.com

On Mon, 9 Dec 2002, Don Maslin wrote: >>Rich, I can likely accomodate you on the SD disk. Are you looking >>for CP/M or N*DOS? - don Don: I'd like to get both since none of the disks I have work. For more specifics, contact me off list. Thanks. Rich

23 years

VAX wanted in Bristol, UK

by Gary.Messick＠itt.com

> -----Original Message----- > From: Carlos Murillo [mailto:carlos_murillo@epm.net.co] > Sent: Monday, December 09, 2002 11:49 PM > To: cctalk(a)classiccmp.org > Subject: Re: VAX wanted in Bristol, UK > > > At 01:30 PM 12/9/02 -0800, you wrote: > >On Erebus, they use pressurized drive canisters for external > SCSI drives. > >At Pole, they don't do anything special. Drives die all the > time. To > >add insult to injury, massively dry air holds a lot less > heat than the > >air you and I are breathing right now - computers and hard > disks frequently > >die from overheating at the South Pole - the air is thinner and drier > >and can't conduct as much heat away from CPUs and drives. > > Quite frankly, to have a system die of heat exhaustion _there_ seems > ludicrous. As long as the assembly can withstand a steep temperature > gradient, there's lots of cooling available, with temperature low > enough to compensate for the decrease in specific heat many times, > right? > > carlos. > > > -------------------------------------------------------------- > Carlos E. Murillo-Sanchez carlos_murillo(a)nospammers.ieee.org > Actually, having flown a high altitude ballon experiment over Antarctica, it's the combination or less air to conduct heat away from the source (A VERY big problem at 100K ft.), combined with the intesity of the radiation >from the sun (being filtered by less atmosphere as Ethan states) and the reflection from the ice. Our expeiment actually used nitrogen pressurized chambers with a optical WORM drive. It turned out we could pressurize the chanbers to about 1.75 atmospheres, then the optical drives would crap out. We suspected the pressure somehow deformed the lenses in the laser system. (aside) The optical drives were manufactured by a company called Cherokee systems in CO. They purportedly militarized the drives for aircraft, and could withstand low pressure. When the drives first arrived, after unpacking, we opened one of the drive doors, and a 2 inch moth flew out. After having some porblems, we call support, and mentioned the bug to them, and they responded, "Yeah, we're having a very bad year with the mothes this year!" I should have know then how buggy the drives system was going to be! ************************************ If this email is not intended for you, or you are not responsible for the delivery of this message to the addressee, please note that this message may contain ITT Privileged/Proprietary Information. In such a case, you may not copy or deliver this message to anyone. You should destroy this message and kindly notify the sender by reply email. Information contained in this message that does not relate to the business of ITT is neither endorsed by nor attributable to ITT. ************************************

23 years

new acquisition: an 11/73 running RSX-11 v4.6 and a question on cihper tapes & CDC SMD disks/controllers

by xds_sigma7＠hotmail.com

Actually, the 7-whatever number sounds like a CDC part number... if they are FSDs, there will be, somewhere on the label, a model number of PAxxx, if either of you find one of these legends, let me know because I have most of the FSD manuals... Blah on ditching SMD for SCSI, if anything I want MORE SMD disks, though for my Perkin-Elmers, not my DECs... Will J _________________________________________________________________ Add photos to your messages with MSN 8. Get 2 months FREE*. http://join.msn.com/?page=features/featuredemail

23 years

UYK-40 vs UYQ-70 Shipboard computers

by jpl15＠panix.com

In doing a bit of inquiry as to the desireability of the various surplus UYK40 and 44 computers, I found that the K-40s are all being replaced as fast as possible by the current UYQ-70 system, made by Lockheed Martin in Minnesota. You can check out this system at: www.q70.com quite a fascinating look at what the next generation's collectible surplus looks like today. Cheers John

23 years

386 Motherboards available

by cb＠mythtech.net

I have a few 386 motherboards here that I want to get rid of. They are free for the taking, or I will ship them to anywhere if you cover the costs. All are as is, but should have been working when removed from service. I have the following: - AMD 386 SX-40, AMI Bios, "Cyclone" chipset?, 6- 16 bit ISA slots, 4- 30 pin SIMM slots. This board is smaller than normal boards. It measures 8.5 x 6.75 inches. - AMD 386 SX/SXL-25, AMI bios, VLSI chipset?, 7- 16 bit ISA slots, 8- 30 pin SIMM slots. Underside has a part number MB-1316/20/25VST. - Intel 386 SX-20, AMI Bios. "Chips" chipset?, 6- 16 bit & 2- 8 bit ISA slots, 8- 30 pin SIMM slots. This board is larger than normal, 13 x 8.75 inches. This is from a WYSE PC, and has some custome WYSE chips in it. Also looks like the AMI bios may be a custom WYSE job (at least it carries a WYSE part number). I don't know for sure if this one can be brought back up to working. It might have needed some ISA cards with it (which I don't know where they are, but I know I had some WYSE ISA cards for things like the drive controllers). 2- AMD 386 SX/SXL-25, AMI Bios, Opti chipset?, 6- 16 bit & 2- 8 bit ISA slots, 4- 30 pin SIMM slots. If anyone wants any of these, or parts from them, let me know. There are no math co-processors on them (but all 5 do have sockets for them). The WYSE board has what may be socketed cache chips (OKI, M514256A-80R, and OKI M51C256-80). -chris <http://www.mythtech.net>

23 years

Looking for N* parts

by RCini＠congressfinancial.com

Hello, all: I'm working with Scott LaBombard to get my N* system (which is mostly made up of Vector parts) working. This has been an on-and-off project of mine for years, but I enlisted Scott's help since I can't seem to make it work. After slogging through all the parts, re-configuring everything, and doing some testing, we've found that I need either a N* single-density boot disk or an MDS-AD/AD2/AD3 double-density controller. It seems that when I got this machine a few years ago, the person must have had multiple N* systems and sent me only double-density disks (common) for a single-density (more rare) equipped system. Can someone help me out with this? Does anyone have a spare N* DD controller? Thanks in advance. We're pretty close on this one. Rich

23 years

AN/ UYK-20X(V) (fwd)

by aw288＠osfn.org

!!!!!! No thanks. ---------- Forwarded message ---------- Date: Sun, 08 Dec 2002 09:04:52 -0800 From: shirin <shirin(a)shaw.ca> To: William Donzelli <aw288(a)osfn.org> Subject: RE: AN/ UYK-20X(V) Original purchased Price: $90,554 USD I am selling these for $24,000 each Following is the list of accessories: It. 1. AN-UYK-20X(V)[PARA] Production Type 1600[PARA]Data Processing Set 1 2. SE610-AV-MMO-010 GFM Operating and Maintenance With Part List 1 3. SE610-AV-MMO-020 GFM Reference Data 1 4. SE610-AV-MMO-020 GFM Equipment Diagrams Part 1&2 1 5. SE610-AV-MMO-050 GFM Diagnostic Programs 1 6. SE610-AV-MMO-060 GFM Diagnostic Program [PARA]Listing Basic test 1 7. SE610-AV-MMO-070 GFM Diagnostic Program [PARA]Listing Basic test Special IO 1 8. SE610-AV-MMO-080 GFM Confidence Tests 1 9. PX1302-0-6 Hardware Users Guide 8K 1 10. 7101943-02 STD Parallel Conn, Input 2U45 8 11. 7101943-03 STD Parallel Conn, Output 2U45 8 12. 7101943-05 Conn Serial 188C 6 13. 7128073-01 Maintenance Kit, Elect Equip 1 14. 7150314-01 Power Connector 60HZ 1 15. 7163304-00 Air Plenum ASSY 1 16. 7101943-06 Conn Serial RS-232C 2 60 Hz supply Weight: 334 lb They are complete and fully operational brand-new with military standards in original packing. Open to offers. I am located in Canada and the computers are in stock Dubai, UAE -----Original Message----- From: William Donzelli [mailto:aw288@osfn.org] Sent: Saturday, December 07, 2002 4:14 PM To: shirin Subject: Re: AN/ UYK-20X(V) > I have 9 brand new AN/ UYK-20X(V) in stock. Any one interested? > Original package plus all accessories. Yes. How much, and where are you located? William Donzelli aw288(a)osfn.org

23 years

new acquisition: an 11/73 running RSX-11 v4.6 and a question on cihper tapes & CDC SMD disks/controllers

by spector＠zeitgeist.com

I just got a new acquisition -- a PDP11/73 (born an 11/23 plus but upgraded) -- up and running. Its running RSX-11 v4.6 and I found a useful tidbit which may come in handy to others since I had no info on accounts on this machine and have limited experience with RSX-11 (I was a RSTS, UNIX and VMS guy wrt machines of this era): As it booted, several well-timed ^C's as tasks were being installed got me to an MCR> prompt where I could run $ACNT and make myself an account so I could log in. Re: making accounts, it was a trip to see the "depth" of account info and security on the machine. :-) Its an interesting little machine: M8192 PDP-11/73 processor M8043 DJV11-J 4-port async M3104 8-port async Emulex HD controller (not SMD) -- model not (yet) known Emulatex tape controller (ibid) for Cipher 3200/1600 bpi 9track tape drive 512KW memory (no name or number on board -- only a sticker that says "made in hong kong") M7504 DEQNA Cipher model M890340-96-1050U tape drive KPV-1180 Parallel Line Printer Controller Printronix P6000 ~400lpm line printer (biiig data center cabinet .. dot matrix, circa-1985) It has some flavor of winchester that looks to the OS like an RA81 (but is a 5/25" HDA -- I haven't disassembled every part of the rack yet). Also in its low-boy case are two CDC SMD "Fixed Storage Disks" disks (27"+ deep, > 50 lbs, SMD interface) for which I have an empty slot but no controller for. The model # on the disks is: 72859381. Does anyone have any ideas on these disks and what kind of controller would bring these CDC disks back to life..? (anyone got controllers to trade? I have all sorts of goodies...) Als, any online pointers to maint manuals for the tape drive..? regards, David ------------------------------------------------------------------------ - David HM Spector spector(a)zeitgeist.com software architecture - network/security consultation technical due diligence - technology planning/analysis Office:(631)261-5013 Cell: (631)431-5756

23 years

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test-drb December 2002