test-drb April 2005

test-drb@ccmp.vtda.org

269 participants
730 discussions

SGI parts and RS/6000 disk mounting (still)

by Saquinn624＠aol.com

Does anyone know of somewhere to get old SGI parts? I'm still looking for something with a R3010 on it for my 4D/25 (IP10/12 board or similar . . .). Most places (Reputable) seem to not have anything older than I2/Indy (and seem a bit pricy- but I guess that comes from having to keep an inventory etc.) (2) I'm still trying to figure out mounting the HDD in my 3CT. I looked at the IBM manuals, and they all seemed to reference the SCSI extender card (as used on my 370), but that won't fit in the 3CT. It's one of the ones with the two externally accessible 5.25" bays and the floppy mounted on top. It looks like some sort of drive rails, but I don't see the screw hole for securing the drive. I've got the drive loose in the cage, and it might have to stay that way, but it would be nice to know how it was really mounted.

19 years, 8 months

LaserWriter Plus

by cb＠mythtech.net

>No one remember which dip controled this? <http://docs.info.apple.com/article.html?artnum=3704> That tells you how to turn on and off the Test Page. It isn't done via dip switches as I thought I recalled it being. It is done programatically (as someone else reported). Chances are really good it wasn't turned off, and simply powering on the printer will cause you to get a test page. >Actually, anyone know if the manual is online somewhere? <http://manuals.info.apple.com/Apple_Support_Area/Manuals/printers/Laserwri terLaserwriterPlus.PDF> When you can find it, Apple's web site actually has a decent amount of info on most all their products dating back to the Apple IIe. The problem can be finding it, they don't tend to make it easy, and I swear every time someone figures out the logic, they rearrange the site to better hide the old info. -chris <http://www.mythtech.net>

19 years, 8 months

Must-have PDP-11 accessory on eBay -- VINTAGE BUS GRANTOSAURUS REX

by wacarder＠usit.net

> > > Bill Maddox said: > > > > > > http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=1247&item=5181545036… > > > > > > --Bill > > > > I want it!!! > > > > Ashley > > Maybe this is somebody's humorous answer to preventing their knuckles from > getting > torn up by trying to reach between the big boards to get to those little G727 > cards. > > I'm bidding. > > - Ashley I bid, but I probably should have waited till the last minute. If I had waited, those folks who are secretly stalking me on ebay would perhaps not have known about the existence of the rare and elusive Grantosaurus Rex. That is, if they had not read Bill's original post with his paleontological discovery. Ashley

19 years, 8 months

Must-have PDP-11 accessory on eBay -- VINTAGE BUS GRANTOSAURUS REX

by wacarder＠usit.net

> > Bill Maddox said: > > > http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=1247&item=5181545036… > > > > --Bill > > I want it!!! > > Ashley Maybe this is somebody's humorous answer to preventing their knuckles from getting torn up by trying to reach between the big boards to get to those little G727 cards. I'm bidding. - Ashley

19 years, 8 months

Must-have PDP-11 accessory on eBay -- VINTAGE BUS GRANTOSAURUS REX

by dvcorbin＠optonline.net

> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=1247&item=5181545036… > Well there goes my chance of picking it up at a reasonable price.... ;(

19 years, 8 months

Intellec MDS questions

by rsnats＠bellsouth.net

Joe, I saw where you might have a MDS floppy disk system. Is it for sell? Bob rsnats at bellsouth.net

19 years, 8 months

Definition of a Computer

by dvcorbin＠optonline.net

> Megan wrote: > > Years ago, someone (I don't remember who) gave the definition of a > > computer as a "device which inputs some stuff, does some stuff to > > it, and outputs some other stuff". > > Eric Replies... > Which is presumably not actually very useful as a definition of a > computer,since a cow would qualify. > Of course, that makes it a cowputer....

19 years, 8 months

Unix on old-ish machines - advice sought

by pete＠dunnington.u-net.com

On Apr 6 2005, 9:39, Stan Barr wrote: > I'd like to get a straight (ie no X) Unix running on some sort of > older, but not necessarily ancient, hardware. My Micro-11/73 is > not really suitable, and PDP-11s that are seem to be a bit thin > on the ground over here in the UK. I've seen a few Vaxen and > MicroVaxen on the market lately so my thoughts are turning in > that direction. I know a few people here run such machines and I'm > seeking advice on the best machine to look for and, at the risk of > starting a religious war, the best unix to run on it... :-) A micro-11/73 would run 2.11 BSD quite well. I have one like that (actually it's an 11/83 but not very different). An 11/23 would run 7th Edition, but it would be slow, and have no TCP/IP networking. A microVAX would do BSD quite well. Or if you want something classic but not *too* old, my favourite would be something like an SGI Indigo. An R3000 with Irix 5.3 would be quite nice (I have three of them). If you'd asked 6 months ago you could have had one of my spares, and a monitor. Maybe you'd like an SGI Indy, with Irix 5.3? I certainly have a spare Indy. BTW, I also saved a hub and a terminal server for you... -- Pete Peter Turnbull Network Manager University of York

19 years, 8 months

D.G. Nova update... disk drive again

by dwight.elvey＠amd.com

>From: "Tom Jennings" <tomj at wps.com> > >Well all seemed fine, I was working on Kermit, making good >progress, then I/O PARITY ERROR AT xxxx -- disk read error. Diags >etc, another shows up. Then another, but a previous goes away... > >Clearly there is a soft(ish) read error. Probably all those cheap >ceramic disks on the read/write/amp board. So I will order nice, >new, correct monolithic caps, and replace all the replacements. >It's almost certainly in the analog read/write section, and not >hard logic, said hypothesis boosted by the fact of my fiddling in >that arena. > >I ran memory diags and all that stuff, but I am assuming it's the >electronics I fiddled. I'll go do the job Right. > Hi I know that you'd like to blame the capacitors but if these were all bypass capacitors, it is unlikely that they are the source of your problem. I have found that when bringing up older electronics of this complexity, that has not been operational for some time, that active parts tend to fail over the next 2 or 3 months of operation. I expect that the culprit is moisture. When the unit is always powered, the heat of each part keeps moisture from accumulating within the plastic IC packages. When turned off for some time, moisture builds up inside the parts. When power is applied, this causes some electrolysis inside that destroys the part. I've thought that it might be better to bake the boards in a dry N2 environment at about 120F for a few weeks before powering on units that have been sitting for a long time. Not having any way to confirm if this would work, I've not been able to verify it. This would be bad for electrolytic capacitors but these are often more easily located and replaced. Good luck, we are all hoping things will be easy to find for you. Dwight

19 years, 8 months

DEC H734A?

by pat＠computer-refuge.org

In a haul of DEC (and other) stuff last week, I got a DEC H734A power supply, not attached to anything. Can anyone tell me what this goes to? Google doesn't have very many hits, and it's on the the qbus/unibus field guide. Pat -- Purdue University ITAP/RCAC --- http://www.rcac.purdue.edu/ The Computer Refuge --- http://computer-refuge.org

19 years, 8 months

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test-drb April 2005