test-drb April 2002

test-drb@ccmp.vtda.org

280 participants
1162 discussions

by doc＠mdrconsult.com

The previously-mentioned VAX came with this board. AW-20-859-2 TFC-925 QBUS/GCR Tape Controller Much to my disappointment, it seems to be a 9-track tape controller instead of a SCSI interface. No cables, just the board. If anybody has more detailed info, I'd like to know. If it's really not a SCSI controller, I don't plan to have a 9-track anytime soon. I'll entertain offers to trade for it. Doc

22 years, 9 months

recreating the PDP-11

by mcguire＠neurotica.com

On April 6, Ben Franchuk wrote: > The PDP-11 is way too complex for SSI logic. DEC did it. :) -Dave -- Dave McGuire "I thought it would go quickly, St. Petersburg, FL that rubberized bottom..." -Sridhar

22 years, 9 months

7 Track Tapes...

by jimw＠agora.rdrop.com

Zane commented... >> >I'm a little shocked to hear he (Paul Pierce) can read 7-Track tapes >> >though. >> >> Why shocked? Paul has some really cool gear! > >I'd heard being able to read 7-Track's was a lost art. But isn't that what we're all about? Preservation of the 'lost arts'? ;^} -jim --- jimw(a)agora.rdrop.com The Computer Garage - http://www.rdrop.com/~jimw When's the last time you decompiled Z-80 code? For me it was last week!

22 years, 9 months

should I take RM03's ?

by mcguire＠neurotica.com

On April 6, The Wanderer wrote: > > I thought the only big difference between the RM02 and the RM03 was > > the spindle speed, though. > > Not entirely according to my copy of the systems & options summary > guide. > The RM02 canbe used with any PDP except the 11/70, while the RM03 is > only for the 11/70, as it has a massbus interface. Wait a minute...ALL RM02/03/05 drives are massbus. It is my (old and possibly erroneous) understanding that the RM03 was sold with the 11/70 in particular because it had a faster spindle speed, and as such, transferred data more quickly. What, specifically, does that Systmes & Options guide say about these drives? -Dave -- Dave McGuire "I thought it would go quickly, St. Petersburg, FL that rubberized bottom..." -Sridhar

22 years, 9 months

Shoddy Hardware (Was: Re: WW fixtures (was Re: "New" PDP-8))

by pete＠dunnington.u-net.com

On Apr 5, 19:54, Merle K. Peirce wrote: > Peter, could you address how Acme threads fit into these schemes? I > should expect that they are always relatively coarse. In a sense, they don't. They're not normally used for fasteners, which is what the others are for (arguably with the exception of BSP) :-) Yes, they're usually fairly coarse, and used for things like leadscrews on machine tools and vise jaws. For leadscrews, they're usually made to some specific pitch that equates to some nice decimal number of turns per inch, or millimetres per turn. They're also unusual in having large flats on both the crests and troughs (most other threads are rounded on one or the other); in fact they're almost square -- the thread depth is 0.5 x the pitch, and the walls slope at only 14.5 degrees, so the included angle is 29 degree, much less than most threads which are typically either 55 or 60 degrees. And the clearance between screw and nut is very small, typically 0.001". -- Pete Peter Turnbull Network Manager University of York

22 years, 9 months

Amish Virus

by DAW＠yalepress3.unipress.yale.edu

> From: Richard Erlacher > > You guys have too much free time ... and the grammar and syntax in this > thing > are all screwed up. "Thou" requires "hast" rather than "have." Thine = > yours. Thy = your. > > Dick > > > Joe wrote: > > > > > > > > > AMISH VIRUS: > > > > > > Thou have just received the Amish Virus. > > > Since we do not have electricity nor computers, > > > thou art on the honor system. Please delete all > > > of thine files. > > > > > > Thank thee. > So, it should read... "... Thou hast just received the Amish Virus. Since we do not have electricity nor computers, thou art on the honor system. Please delete all of thy files. Thank thee. --- David A Woyciesjes --- C & IS Support Specialist --- Yale University Press --- mailto:david.woyciesjes@yale.edu --- (203) 432-0953 --- ICQ # - 905818 Mac OS X 10.1.2 - Darwin Kernel Version 5.2: Fri Dec 7 21:39:35 PST 2001 Running since 01/22/2002 without a crash

22 years, 9 months

should I take RM03's ?

by mcguire＠neurotica.com

On April 5, Ethan Dicks wrote: > > A.K.A. CDC 9762 with a Massbus<->SMD adapter in the bottom.... > > Sort of. I worked for a DEC reseller in the summer of 1998. He > picked up a couple of RM03s cheap and wanted to hook them to one > of our PDP-11s through some Emulex or similar SMD interface. The > idea was to pull the cables out of the adapter, run them into the > Emulex card, and turn an RM03 back into a 9762. > > The quick answer was we were unable to make it work. We even borrowed > some cards from a real 9762 and swapped them into the card cage in the > RM03 (the one near the positioner magnet). It didn't help. > > DEC must have made some change outside of ECOs to the cards that > made the drive only work with their Massbus converter. Weird...I dunno about the RM03, but I ran an RM02 on a Dataram Qbus SMD controller (I don't recall the model number) many years ago in an 11/73. It worked fine. I thought the only big difference between the RM02 and the RM03 was the spindle speed, though. -Dave -- Dave McGuire "I thought it would go quickly, St. Petersburg, FL that rubberized bottom..." -Sridhar

22 years, 9 months

can anyone read some punch cards?

by uban＠ubanproductions.com

I have a friend who has a few decks of punch cards that he would like to read. Does anyone have this capability who is willing to do it? Thanks in advance... --tom

22 years, 9 months

Ultrix root password

by broth＠heathers.stdio.com

I snagged a PDP11/53 and Two MicroVAX II's today at the salvage yard. $5 a piece. Doesn't happen very often but feels good when it does. The MV's have Ultrix on them and boot fine BUT..... Is there an easy way to bust the root password for Ultrix on the console? Thanks, Brian.

22 years, 9 months

can anyone read some punch cards?

by aek＠spies.com

> I'd heard being able to read 7-Track's was a lost art. The problem is finding a drive with a 7 track head. The stuff has been out of production for 30 years and people stopped making 7 track head stacks a LONG time ago. I've been looking for one for a couple of years now. Heck, I'd be happy just to find a 7 track head stack.. I'm still kicking myself for missing the 7-track TU10 that was on eBay a couple years ago.

22 years, 9 months

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test-drb April 2002