test-drb May 2001

test-drb@ccmp.vtda.org

273 participants
642 discussions

by ajp166＠bellatlantic.net

From: emanuel stiebler <emu(a)ecubics.com> >Will Jennings wrote: >> >> Paul, >> I too can confirm that it should work; the 11/23+ sitting next to me is >> running 5.2FB and it has an RQDX3. > >Since when do you have any running pdp11 systems ? >;-) >cheers Well I do have a running PDP-11 (various) and at least two have RQDX3s. If a RQDX2 works the 3 will too. Allison

23 years, 2 months

Back to booting that MicroVAX...

by ajp166＠bellatlantic.net

From: Peter Kukla <fruviad(a)coil.com> >The SCSI connector on the back tends to be flaky on the MicroVAX 3100s? >Hmmm...that knowledge will save me a lot of frustration. Thanks... :-) > >Peter Not really. Older 3100s used the 50pin cannon connector which is standard for SCSI-I and SCSI-II. The later 3100s like the M76 used the oddball 68pin HDB, and I'd add long before PCs did! I know this as I have a bunch of 3100s and. Allison > > >Zane H. Healy electronically enscribed: >> >> >Well, since the concensus seems to be that I'll need to get a CD-drive for >> >this thing, I guess I'll start looking. >> >> Remember it needs to be one that supports 512-byte blocks, instead of the >> standard 2048-byte. If it's Sun-Bootable, it should work just fine. Since >> I suspect you've got a wacky SCSI connector on the back of that machine >> you'll probably want to pop the hood and plug the CD-ROM at least >> temporarily into the internal cable. >> >> >I did sign up for a DECUS membership a few days ago...never heard anything >> >back from them, so I'll wait a few days and resubmit my signup if nothing >> >materializes from them. >> >> I've heard people have been having trouble, it might actually take a phone >> call from what I've heard. BTW, my membership had expired over a year ago, >> and I was still using my ID to get hobbyist PAK's. >> >> Zane

23 years, 2 months

Geek Radio Networks (was: Re: Finds... (mainly Heathkit 3400))

by ajp166＠bellatlantic.net

From: Megan <mbg(a)world.std.com> > >>Have you seen http://www.irlp.net/? They are linking local amature radio >>networks together using the internet as a backbone. Not 20 or 40 meter, >>but interesting non-the-less. > >Heard about it for the first time today, talking with drive-time >friends on the local 2m repeater. One person was quite enthused, >but others were somewhat hesitant -- "It's not real ham radio, since >you use the internet for the real hop" and "Why not just use your >cell phone, it's no different." That and Amateur radio still has rules regarding commercial and third party traffic. Reminds me of the linkages I did 30 years ago with copper lines (phone). same old thing. Allison

23 years, 2 months

MicroVAX 3100 booting question...

by fruviad＠coil.com

Newbie here...apologies if this is a stupid question. Background: I'm a unix-geek who has used VMS in the past, but never done any VMS administration. Naturally, when I got the opportunity to possess my own MicroVAX 3100, I leapt at it! I managed to get a terminal for the VAX and figured out how to boot it, via "BOOT DKA300" at the >>> prompt. This gave me a boot sequence of some sort, terminating in an OpenVMS 6.1 tagline and a "$" prompt. Unfortunately, once I got to this point, I was at a loss about what to do next. None of the VMS commands I enter are recognized as valid commands...they all return the error: %CLI-W-IVVERB, unrecognized command verb - check validity and spelling I haven't been able to find anything on the web that tells me what to do next. I've even left the box running since I booted it last night, for fear that turning it off will corrupt a mounted filesystem. Anybody out there know what I'm not doing right, or have a URL that points to a site for a beginner-Admin of a VMS box? Thanks... Peter Kukla

23 years, 2 months

DEC 325SL Adapter Info Needed

by sipke＠wxs.nl

Hi, Although not yet 10y old ......... And no big Iron ....... I Got a DEC 325SL Laptop (386SL 4MB Mono-LCD) from a friend to fix but .... the poweradapter got lost. I dunno if the batteries are still alive but I want to give it a try. Does any body know: 1 The adapter output voltage? 2 The max. current the adapter must supply? 3 The polarity of the output ? (It's got a female powerjack connection "(o)"style) If I can get it working, I might try to install Linux ;=) Anybody got any hints on this? Regards Sipke de Wal --------------------------------------------------- http://xgistor.ath.cx ---------------------------------------------------

23 years, 2 months

Amiga items on eBay -- advertising auctions on classiccmp

by cmurillo＠emtelsa.multi.net.co

At 08:22 AM 5/2/01 -0600, Robert Feldman wrote: >Flooding can be blocked if you take advantage of proxy bidding. Just decide >what your _maximum_ bid is, and enter that amount (near the end of the >auction, if you want, but not at the last second). Your actual bid will only >be the minimum increment above the next highest actual bid (and not >necessarily what you are willing to go up to). -snip- And at 07:51 AM 5/2/01 -0700, Marvin wrote: >The short answer is yes. The DNF (Discuss Newest Features) board has a >sniping contest at 22:22:22 PDT Ebay time and the highest I've seen is 39 >posts in that one second. And to say again, sniping only works against >bidders who either do not know or are not willing to bid what an item might >be worth. I think that "stategy" you are talking about is just ignorance of >the system. Sigh. You guys are taking the position of lots of economists when discussing real-world markets, saying that the theory supports the well-behavedness of the market and neglecting the fact that the assumptions that were necessary to prove the theory do not apply to the real problem. In the auction institution that eBay uses, which is technically a demand-side bidding, raise-only, interactive auction with sealed bid caps and fixed increments, for the clearing price to reflect the actual market price you need many assumptions, not the least important of which is something called "rational bidding behavior". That means that the buyers have done their homework, examined their costs and benefits and determined an optimal strategy (i.e., a "maximum price" in the case of single lot auctions as in most of eBay auctions) that they are willing to pay. However, it takes only _one_ irrational buyer to bias the clearing price by the minimum price increment, and it takes only _two_ irrational buyers to transform the auction into a game whose payoff (or rather, whose negative payoff) will be bounded only by how stupid the buyers are. Bidding contests are proof of irrational behavior in eBay and it happens all the time. There is a definite psychological component that fuels the escalation of the price: "I want to win even if it makes no sense financially". There is an inherent time dimension in the problem because when people lose the high bidder position they convince themselves to bid even more although they had decided on a max price earlier. Because of this time dimension, the longer the price stays high, the likelier it is to go up further. It is simple psychology, and undoubtedly irrational. But that's how it is, and there is nothing that you, as a buyer, can do to change the behavior of such bidders. However, you can mitigate to some extent the effect that such buyers have on the clearing price by bidding late in the auction, giving them less time to convince themselves to raise their bids. Thus sniping is born. Sniping is a sensible strategy in an eBay auction with irrational bidders. It has the effect of transforming the auction institution into something of a sealed bid auction, which can really mitigate the effects of irrational bidding. Furthermore, because irrational bidding tends to be specific to a particular auction (it doesn't necessarily carry over to set the price of subsequent auctions, because of the "bidder remorse" issue), repeated auctions will tend to stabilize closer to the fair market value. The fact that sniping is a standard mechanism used by lots of buyers on eBay just proves what everyone doing experimental economics has observed again and again: if there is one way to game the system, it will be found, and, once it is found, the strategy will spread and become commonplace. At our group, we have used experimental economics tools to analyze the behavior of open energy markets. We have tried almost every auction institution (first accepted offer, first rejected offer, discriminatory, Vickrey, variants of these, you name it). Even though the experiments are carefully setup to prove or disprove a given hypothesis, we are always amazed by the range of unexpected, highly creative behaviors that we had not thought of. If you care to read about our group's work, here's our web site http://www.pserc.wisc.edu/ and our web-based experimental economics market simulator http://www.pserc.cornell.edu/powerweb/ Carlos. -------------------------------------------------------------- Carlos E. Murillo-Sanchez carlos_murillo(a)nospammers.ieee.org

23 years, 2 months

xtrs 4.5, a TRS-80 emulator for Unix and X

by tim.mann＠compaq.com

You can now get xtrs version 4.5, a Radio Shack TRS-80 Model I/III/4/4P emulator for Unix and the X Window System, from my TRS-80 Web pages: http://www.tim-mann.org/xtrs.html Version 4.5 adds emulation of the remaining undocumented Z-80 instructions, along with several other small improvements. See the included ChangeLog for details. This may be the final version, since I'm running out of ideas (and documentation) for TRS-80 peripherals to emulate. General xtrs blurb: xtrs is a Radio Shack TRS-80 Model I/III/4/4P emulator for Unix and the X Window System. It includes lower case, the real time clock, hi-res graphics, serial port, parallel printer, mouse, cassette, sound and music output (requires OSS), 5" and 8" floppy disk drives in single and double density, and even hard disk drives. The emulated floppy and hard disk file formats are compatible with the popular MSDOS-based emulators by Jeff Vavasour, Matthew Reed, and David Keil, and (if you choose a capable enough file format), all features of the original TRS-80 floppy disk controller are emulated. Under Linux, physical floppy disk drives are also supported. Physical cassettes can be read and written too. The user interface is a bit spartan, but it gets the job done. Tim Mann tim.mann(a)compaq.com http://www.tim-mann.org Compaq Computer Corporation, Systems Research Center, Palo Alto, CA

23 years, 2 months

HD for NeXT recommendations?

by mtapley＠swri.edu

All, Having some problems with my beloved NeXT. I'm *hoping*, perhaps unreasonably, that they are related to the internal hard drive. I want to try replacing it with a different one. Here's what I'm looking for: Very Reliable Low Power consumption/heat dissipation 3.5 inch 50-pin SCSI 550 Meg < capacity < 2 Gig Inexpensive Recommendations? Both drive model, and where to get one? I have an RZ26 which would probably be perfect, but I hate to use up a DEC drive in a non-DEC machine, having heard of the trouble folks have had trying to go the other way. (Still awaiting CD and User ID number from Mentec and Encompass, respectively.) Other (possibly pertient) info: Machine is a 68040 cube, non-turbo. Its drive bays are big enough to accomodate 5.25 inch drives, but the lower bay contains an optical and the upper bay contains a floppy *and* the internal hard drive. There is an external case with a pair more hard drives and some pretty questionable cabling, but the fault has appeared with that whole setup disconnected (though not lately). Internal hard drive (and floppy) are cantilevered between a pair of plastic plates that are screwed to the inside of the drive bay. The cantilever is formed by a set of mounting screws that go from the plastic to the drive screw holes via plastic stand-offs. I'd say it's pretty likely the drive is electrically isolated from the chassis except for the power plug ground. I'd say it's extremely likely the drive is thermally isolated >from the chassis, so it's entirely air-cooled. The fan is circulating air in the volume where the drive is hanging. Fault appears during heavy disk activity only. Can happen as a consequnce of find / -name .nfs .... for example, which appears in the daily cron job (sigh). Can also happen when find / -name .nfs is entered from a terminal session. Things like cd / du can produce "segmentation fault" errors as well. /private/adm/messages log file shows unsettling things like: May 3 10:16:05 mtapley2 mach: unexpected kernel page fault failure May 3 10:16:05 mtapley2 mach: trap: type 0x410 fcode 5 rw 1 faultaddr 0xb570101a May 3 10:16:05 mtapley2 mach: trap: pc 0x4001ada sp 0x3fffb0c sr 0x2000 May 3 10:16:05 mtapley2 mach: trap: cpu 0 th 0x101b2030 proc 0x101b1af0 pid 210 pcb 0x101b2230 May 3 10:16:05 mtapley2 mach: traceback: fp 0x111d5fb0 May 3 10:16:05 mtapley2 mach: called from pc 0x040f15c6 fp 0x00000000 4-args 00000001 b570101a 00000000 00000000 May 3 10:16:05 mtapley2 mach: last fp 0x0 May 3 10:16:05 mtapley2 mach: panic: (Cpu 0) MMU invalid descriptor during table walk (Is this consistent with a soft hard-drive failure, or am I barking up the wrong tree entirely?) Sometimes during attempts to reboot after fault, monitor shows file systems clean but then I later get a panic - requiring fsck for the next reboot. Fsck often has to be run repeatedly. (Fsck represents fairly heavy disk activity. Sigh.) Fault has not appeared within 30 minutes or so of powering the machine down and leaving it to cool for 10 minutes or so, so may be at least partially due to thermal problems. Advice or recommendations for things to try are welcome. Thanks in advance for any form of help. - Mark

23 years, 2 months

RQDX3 under RT11

by xds_sigma7＠hotmail.com

Paul, I too can confirm that it should work; the 11/23+ sitting next to me is running 5.2FB and it has an RQDX3. Will J _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com

23 years, 2 months

Back to booting that MicroVAX...

by ajp166＠bellatlantic.net

From: Eric Dittman <dittman(a)dittman.net> >> MicroVAX 3100/20e...I couldn't get it to boot, except into Standalone BACKUP >> mode. When the box boots, it reports that it's finding the tape drive, >> DKA300, and DKB200. >> >> I tried Eric's suggestion, but no luck. My guess is that I need to get >> the OS on TK50 tapes and find out whether the 2nd disk is even alive, but >> I have no idea where to get VMS on tape. I've been playing with intel >> hardware for years, but this is the first time I've ever experimented with >> VMS. > >I don't know where to get VMS on a TK50 at a reasonable >price, but if you have a CDROM drive you can order the >OpenVMS Hobbyist CD Media from www.montagar.com/hobbyist/. Anyone with the cdrom can cut a tape if they have a TK50 as there is no real restriction on where the media containing VMS install comes from. However it will likely be several tapes. Am alternate method is to clone the disk (use backup/image) and send the disk (RZ25 is plenty big enough). Or the Cdrom can be copied to an inited RZ25 and the install done from there (you need two drives). The 3100 owner will have to get his own license packs, thats a matter of joining DECUS or their new name Encompass. Allison

23 years, 2 months

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test-drb May 2001