test-drb December 2001

test-drb@ccmp.vtda.org

243 participants
1096 discussions

by csmith＠amdocs.com

> -----Original Message----- > From: Dave McGuire [mailto:mcguire@neurotica.com] > The "bubble sort" is a classic sorting algorithm. That's probably > the algorithm the programmer used to sort the list of files. By way of description Standish says in "Data Structure Techniques:" "Let A[1:n] be an array of n numbers. ... Make repeated sweeps over the array A[1:n] from left to right. Upon detecting any adjacent pair of numbers A[i] and A[i+1] not in proper order, exchange them A[i] <-> A[i + 1]. When a pass is completed with no exchanges having been made, the process terminates. " I believe it's called bubble sort because the lesser numerical values tend to "bubble up" to the top of the array. Regards, Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '

23 years

TK50-GA external SCSI tape unit + Microvax 3100 Desktop

by Antonio.Carlini＠riverstonenet.com

>It has two connectors of Centronics type. One is a >large Centronics type connector, over the three >MMJ connectors. >The other one is, seeing the CPU in its back, at >the LEFT, covered by one semiespheric cover. >This is a "short" Centronics connector. I have a DV-31BTB-A which I know is a MicroVAX 3100 Model 20. Yours, according to the Systems & Options Catalogue I have, is a MicroVAX 3100 Model 10. On the back of mine there is (looking at the back): at the top middle: a DB37 labelled B2 (this is a socket with 37 pins) (I don't think this is available on the Model 10) in the middle row (from left to right) a connector labelled (4-11), this is for an asynch card (DSH32 I think) This is the same "style" as the SCSI connector (i.e., no pins) but is smaller. It is *NOT* a SCSI connector. another DB37 labelled DB37 this is over and slightly to the left of the 3 MMJ connectors. a final connector on the right, labelled with a diamond and a horizontal line through the right hand point. This is the SCSI connector. This connector is the only one that is identical to the connectors on the TK50Z. This is over the printer connector. Having said, if you have the right SCSI cable (i.e. the same connector at both ends) then I don't see how you can possibly have connected to the wrong place. (And it sounds like you have used the RIGHT hand connection and just are unsure what the other one is). BTW: The TK50Z box has two SCSI connections. It does not matter which one you use, but you *must* put a terminator on the other one if you expect the MicroVAX to see the tape drive. I've found a manual with pictures of the connectors. I can scan some pages on Wednesday and email them to you directly if necessary. So a few checks: -- are you using the correct (RIGHT hand) connector? -- Is the unused connector on the TK50Z filled by a terminator? -- What ID is the TK50Z set to? (Avoid 6 & 7 ... the CPU uses one of those ... I forget exactly which because it varied from system to system). -- Avoid any ID used by the existing drives, SHOW DEVICE will list these. The external SCSI bus may well be independent of the internal bus, in which case it will not matter, but again I cannot remember for this system. -- If it still does not work, what to the power up tests say? The error code (if any) should help to track this down. Antonio arcarlini(a)iee.org

23 years

FYI: AT HOME

by mranalog＠attbi.com

Hi All, If anyone is expecting mail for an @HOME.com customer, you may have a small wait. @HOME shut down about midnight local time on Saturday. I was very lucky (I guess) because I was able to get back on the servers Sunday morning to change my account. I am no longer mranalog(a)home.com, I am now mranalog(a)attbi.com. AT&T says that some customers may be out of service for as much as 10 days. Of course, my service was back just long enough yesterday for me to resubscribe to to a few discussion lists and then it was out again. This morning sending mail seems fine but receiving mail is painfully slow. Regards, --Doug ========================================= Doug Coward Poulsbo, Washington Analog Computer Online Museum and History Center http://www.best.com/~dcoward/analog =========================================

23 years

PDP-8/E bulbs

by pete＠dunnington.u-net.com

On Dec 3, 7:51, Tom Uban wrote: > I get replacement bulbs for my PDP11 at the local electronics store. If > you know the voltage, all you have to do is match the base. You may also > be able to find them at: http://www.digikey.com Hmm, I'd not be too sure about that. I believe the correct bulbs are 12V or perhaps 14V, T1-3/4 bi-pin, 0.04A (that's 40mA). I've seen 14V 80mA bulbs in a few places, but I'm not sure if they would be "safe" in the panel - they'd draw twice the current and I'm not sure if the driving transistors are rated for that. Anyone know? (I have a panel, but not a print set). If it's any help, I found some of the proper bulbs for my -8/E recently, and they are marked "OSHINO-1 12-09169" or "PL10161 1209169". I think the 12-09169 may be the DEC part number. On test, they draw between 30mA and 35mA at 12V, and between about 35mA and 40mA at 14V. The ones I've found in the Farnell catalogue (cat no 329-216) seem to be made by EBT Technologies, part no 7382, and they're 14V, 80mA, 1.12W, 3.8 lumens, nominal life 15000 hours, priced around 50p (about 72 cents) depending on quantity. I found the same bulbs slightly cheaper in the CPC catalogue, for those of us in the UK. -- Pete Peter Turnbull Network Manager University of York

23 years

Microchannel ethernet NIC

by csmith＠amdocs.com

Probably RJ45. It is for a friend's machine, though, so I'll have to check. I have gotten an offer of an RJ45 board via email, though, if that's the case. Regards, Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); ' > -----Original Message----- > From: Chris [mailto:mythtech@Mac.com] > >Anybody got one (see subject) they don't want? > Do you want BNC, RJ45, or AUI? > I have one that is BNC and AUI, and one that is RJ45 and BNC, and one > that I think is ethernet that is BNC only.

23 years

FLUKE?

by mcguire＠neurotica.com

On December 3, Lawrence Walker wrote: > I have a program by Charles Martin called CMFiler which I have used for > years and consider indispensable for exploring Doze machines. It is > somewhat like NC but with many more features and has worked (in a dos > window) thru all the MS upgrades(?) up to Win 98 at least. > It would occasionally give a message "bubble-sorting files" when I accessed > a drive. Does this simply mean sequentially ordering ? The "bubble sort" is a classic sorting algorithm. That's probably the algorithm the programmer used to sort the list of files. -Dave -- Dave McGuire St. Petersburg, FL

23 years

Wang info

by jdonogh1＠prodigy.net

I have started putting together some wang info pages on the web, for obsolete/historic systems such as the OIS, and soon, early VS systems. It's just a start right now, but some of it is there for all to see at http://pages.prodigy.net/jdonogh1/wang.html

23 years

Ebay madness -- Kaypro II for $515

by CLeyson＠aol.com

I hope this madness doesn't start a trend - where would that leave the serious enthusiast ? It does beg the question - might it be worth more with "purple" ceramic packages ? ;-) Chris Leyson

23 years

Microchannel ethernet NIC

by mythtech＠Mac.com

>Anybody got one (see subject) they don't want? Do you want BNC, RJ45, or AUI? I have one that is BNC and AUI, and one that is RJ45 and BNC, and one that I think is ethernet that is BNC only. The BNC only one is the only one NOT in use, the others are in machines. I can part with one, but it will mean swapping the machine off the network, so I can't part with it for nothing. If you have good Mac or Apple stuff I can consider a trade, otherwise I can sell it to you (I am not sure what a fair price is, but it will cost me about $25 to deal with replacing it and the machine it comes from). -chris <http://www.mythtech.net>

23 years

History of Computing exam question

by Robert_Feldman＠jdedwards.com

Because it had "IBM" on the front, which gave it validity in the business world. Could you imagine some mid-level/upper-level executive with an Apple II on his desk? Being first, or being the best, does not guarantee success. -----Original Message----- From: Christopher Smith [mailto:csmith@amdocs.com] Sent: Monday, December 03, 2001 12:16 PM To: 'classiccmp(a)classiccmp.org' Subject: RE: History of Computing exam question <snip> I have no idea how the peesee actually lasted as long as it has. <snip> Regards, Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '

23 years

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test-drb December 2001