test-drb June 2008

test-drb@ccmp.vtda.org

194 participants
304 discussions

Searching (again) for some Arpanet-related Documents

by spedraja＠gmail.com

Hello. I should agree if someone could provide me one copy of these documents related with the Arpanet: * BBN Report n.2184, "TIP Hardware Manual" * BBN Report n.2161, "A Study of the ARPA Network Design and performance" * BBN Technical Information Report (TIR) n.89, "The Interface Message Processor Program" * BBN Technical Information Report (TIR) n.90, "The Network Control Center Program" * BBN Technical Information Report (TIR) n.91, "The Terminal Interface Message Processor Program" * BBN Technical Information Report (TIR) n.93, "The Remote Job Entry Mini-host" * BBN Reports n.2999, 2930, 3000, 3001, 2931, 3002, 3004, 3056 and 3126, all of them related with the Pluribus IMP. * NIC 6740, "The Network Resource Notebook" * NIC 7104, "ARPA Current Network Protocols" * NIC internal/informal notes named "TIP Users Group Notes" Thanks and Greetings Sergio

17 years

Documation tags

by wdonzelli＠gmail.com

I have a couple of metal tags for a Documation M200 card reader - one the front green tag with M200 and the logo, and the other the back (bottom?) black tag with the serial number and stuff. Both in pretty nice shape. All this for a buck! Postage included! Don't be a dick and reply off list, please... -- Will

17 years

is this a terminal multiplexer?

by aek＠bitsavers.org

It is a T1 channel bank. One end of a multiplexed point to point connection through a (roughly) 1mbit pipe. Most of the cards are for POTS lines.

17 years

PDP 11/93 + RSX 11M

by support＠simation.com

Hello Henrique, i have same problem as you, reading BRUSYS floppy from RX33, do you get any help according to your question?, i would appreciate any help you can give me thank you Rolando Cornejo Dear Sir, I?m in trouble with the system as the boot stops at : RSX-11M - Plus V4.3 BL66 2044.KW System "Pt/Ps" > RED DU:=SY: when loading from RD53 (RZ 28M-E) and stops at: RSX-11M/RSX-11M Plus Standalone Copy System V03 when loading from RX33 (Brusys floppy) Do you have an idea why the boot does not go on? Thanks in advance, Henrique Gomes.

17 years

Australian Computer Museum

by gerhard.kreuzer＠liftoff.at

Hi, I just recognize this situation before 1th of April, and I send eMails, that I could take care of one or two dec systems (pdp8) but I never get an answer back. Hope their systems arnt scraped!!!!!!! Yours Gerhard

17 years

UK Computer Museum on TV

by aliensrcooluk＠yahoo.co.uk

I for one would like to see it (hope you remembered to record it!). I would see it myself, but our aerial is actually pointed to Central and not Sandy Heath (Anglia TV) after my parents got some guy out to allow my & my bro to have a 2nd aerial line fitted into our bedroom years ago. We didn't realise what he had done until he had left and he never returned any of my dads phone calls. I guess you could say he was a rogue trader of sorts. I couldn't be more local to Cambridge... ok, perhaps I could if I lived *in* Cambridge and not nearby (Cottenham). I'd certainly be interested in being involved with the museum, once I get up and running with my car. Regards, Andrew B aliensrcooluk at yahoo.co.uk

17 years

MicroVax 3900 current draw and heat output?

by ian_primus＠yahoo.com

I'm in the process of thoroughly cleaning my MicroVax 3900 in preparation for installing it in my upstairs computer room. This will be the only "big"* machine up there, all the rest of the iron lives in my semi-finished basement computer room. (concrete floors, plenty of headroom, easy power installation...). The problem is, that my upstairs computer room has always had a bit of a problem with heat and power. I'm installing a second 15amp circuit, but heat dissapation will be limited to the central air conditioning and ceiling fan. So, what I'm wondering is... how much power will a MicroVax 3900, with two RA90's, draw? And similarly, how much heat will it put out? Thanks! -Ian * Note how I put "big" in quotes. I know that a MicroVax 3900 is not a big machine, compared to, say, most of the other Vaxen and stuff I own. But, it's bigger than an SGI Octane, it's bigger than a Macintosh, and it's bigger than the PC's and all the other boxen that live upstairs. So, comparatively, it's "big". Ironically, however, I think it's smaller than my printer.

17 years

Prepare to chuckle...

by tshoppa＠wmata.com

At 6:02 PM -0700 3/9/08, Sellam Ismail wrote: >http://www.vintage.org/blog.php?action=read&pid=22 That's not bad at all compared to some of the stuff I've bought over Ebay. I've been pretty disappointed at some of the 50 or 70 pound lab instruments that look to be in perfect pristine condition before they're shipped to me - but arrived in way way too little packaging and with all the corners bashed in and knobs broken off by the time they get to me. Usually I'm so sad about the whole destruction of what was just a few days before a very nice example of 50-year-old technology that I can't even bring myself to leave negative feedback. What's the point, the seller won't learn, and history's been lost in any event. I'm even sad that I participated in the destruction (although I make it very very clear to the seller what I think he ought to do in shipping, usually the seller just takes it to the "UPS Store" and let them put it in a lightweight carboard box with some peanuts.) I'm left not chuckling but pretty depressed. Tim.

17 years

powering up older machines - is it safe?

by ajp166＠bellatlantic.net

> >Subject: Re: powering up older machines - is it safe? > From: ard at p850ug1.demon.co.uk (Tony Duell) > Date: Tue, 03 Jun 2008 04:39:09 +0100 (BST) > To: cctalk at classiccmp.org > >> > The main worry is not a capacitor Failing. The main worry IMHO is that if >> > there's a fault in the power supply regulation circuitry then that could >> > make the +5V line jump to a high enough voltage to wipe out just about >> > every chip in the machine. Expansive and difficult to put right. However the swithers used are less likely to overvolt than fry the high voltage side (chopper fails!). In the case of the Robin that is there the risk is (other than the video board cap). Allison >> >> I don't disagree with the concern, but I'd be interested in hearing >> estimates on the probability of this taking place. Has anyone had it >> happen to them? > >Yes, sort-of.... > >I've never had it happen in a classic computer, but years ago I was >making a homebrew SC/MP machine. I'd obtained a surplus PSU which I'd >tested and worked fine, and then stuck on the shelf. I was foolish enough >to get it out a couple of mnths later and attempt to use it to power my >homebrew board. Alas something had failed in the PSU (I forget what, it >might just have been a dry joint...) the +5V output was at about 9V. This >wiped out the SC/MP, a couple of 2114s, and at least one TTL chip >(amazingly much of the TTL eurvived). > >I was a schoolboy at the time, and it took a lot of weeks of saving >pocket money to replace that SC/MP. I guess that's why I'm now (over-) >cautious... > >-tony

17 years

Semi-OT? HP 1630G Logic Analyser (grabbers, invasm packs & disk drives)

by jplist2007＠kiwigeek.com

Hey folks; So I'm busy reading the manual to my brand-new-offa-eBay 1630G and, page by page, I'm more and more impressed. I've never owned one before and it just seems like pure magic. I've got it hooked up to a huffy Vector Graphic in my basement (which diagnosed a bad Z80 in a matter of seconds on my test try!) and boy is it useful. First business - does anyone have swaths of the double-grip HP probe grabbers they might be willing to part with for a reasonable sum? Just askin' :) I'm reading the section on the 'inverse assembler', which really is remarkable (like I said, I'm new to this) to have it disassemble various CPU instruction sets. What I do not have, though, is either the appropriate disk drive set (HP 9121S or 9121D, according to the manual) nor any of the invasm packs. I don't suppose there's anyone out there who may be willing to also part with either of the above, again, for reasonable recompense? With the Vector I'm interested in Z80 invasms - but, frankly, the options seem endless given the smattering of 8-bit processors I have covering my shelves in need of attention. There's a 9121D on eBay (6 days out) for $60 w/shipping, which is... do-able but seems a shade hefty. Maybe they're getting harder to find these days, I don't know. As for the invasm packs, for all I know they're complete unobtanium - but I figured I'd go to the repository for such knowledge and see what people thought. Many, many thanks to all. - JP

17 years

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test-drb June 2008