test-drb January 2005

test-drb@ccmp.vtda.org

254 participants
551 discussions

More on PDP 11/24 (hints & Maintenance Card infos needed)

by cheri-post＠web.de

Thanks alot for your advices and the links, Ethan. > No. There are 1MB boards for the 11/24, but they are somewhat odd, > IIRC. I have an 11/24 at home with a KT24 (M7134?) Physical Address > eXtension (PAX) board that lets you put more than 256K of memory in > the 11/24, giving it a slight edge over the 11/34, at least in terms > of max memory (the 11/34C might be able to crunch numbers a bit > faster). > I reasonably confident that the 11/24 and 11/44 used the same memory. > For 256K boards, it should be the M8722 (MS11-MB). Grubbing around on > http://www.pdp11.co.uk/search/modules.ehtml?name=ms11&submit=Search > seems to suggest that the 1MB version is the M8743 (MS11-PB), but I > don't have my hardware close at hand to check my own machines. Max is > 4MB (as with any 22-bit address bus). My 11/24 _uses_ the KT24 Mapping Module with the suggested MS11-PB, giving it 1MB of ECC Memory. I can guarantee, that this combination works :^) There's another board, I own: a MS11-LB (M7891-BB) with 128kb. But I suppose that it doesn't make much sense to put this one together with the MS11-PB. The Ms11-PB is certainly much faster than the MS11-LB. Unfortuantely, the National Semiconductor boards can't be used, they were built for a VAX 11/750... Currently, I have some problems to get this baby work. There is a strange malfunction: When typing in some letters or digits on the keyboard (VT420), the screen turns out some sort of random characters at the @-pormpt. It's very weird ! Sometimes, when I turn it off and on to give it another try, it becomes impossible to type something. The prompt is waiting, the cursor's blinking and the machine try to bootstrap, when pushing the boot-button, but I simply can't type in anything ! The grant und bus connections are closed. The terminal works perfectly on local mode. The "Clock" LED is on, in fact, never turns off, while the 1-LED (the one next to the Clock-LED) turns on when the PROM for the CPU diagnostic is loaded (@165004g). After that, both LEDs remain on. The Maintenance Card for the 11/24 isn't on the internet (at least, I didn't find it), and there, the LEDs functions are described. Could anybody give me some help on this ? Pierre ________________________________________________________________ Verschicken Sie romantische, coole und witzige Bilder per SMS! Jetzt neu bei WEB.DE FreeMail: http://freemail.web.de/?mc=021193

19 years, 11 months

Kinetic's FastPath 4's

by dholland＠woh.rr.com

Hi, To re-iterate a CCTalk thread I found that was two years old, anyone got any documentation on one of these things? (I picked up one off of EPay cheap, in a vague attempt to get some networking into a IIgs) I've found this page here: http://www.walshcomptech.com/fastpath5/ That site had a little software for the FastPath 5, however, I've not had the opportunity try it out. (None of the Apple boxes I have access to have any sort of network in them. Powerbook 540c, and of course the IIgs.) So, anyone seen any other documentation on the things, on the web? Thanks! /me goes back to googling for doc's... David

19 years, 11 months

Photo Questions

by aek＠spies.com

> Al, are you indicating that a) your copy of the book has been scanned correct. I'm not sure I'm comfortable with putting it on line, however. also, it is a VERY strange book. I pulled it out again just to refresh my memory about just exactly what they were trying to do with this project while you could consider it a 'computer', it is not an 'automatic computer' every switch (all those little things made from paper clips) are operated manually.

19 years, 11 months

GI AY-3-8600 pinouts

by witchy＠binarydinosaurs.co.uk

Hi folks, Happy festive stuff :) Does anyone have pinouts of the aforementioned chip? I can do the 8500 but not the 8600 which allowed horizontal movement amongst other things...... Thanks! -- Adrian/Witchy Creator/Curator of Binary Dinosaurs, quite probably the UK's biggest private home computer collection. www.binarydinosaurs.co.uk - the online museum www.aaghverts.co.uk - *the* site for letting you moan about adverts! www.snakebiteandblack.co.uk - former gothic shenanigans :(

19 years, 11 months

FTGH: DEC documentation (UK)

by listmailgoeshere＠gmail.com

Hi list, I have here a DEC documentation set for the VT220 (its outer cardboard cover says VT200, though). It contains: VT220 Owner's Manual (EK-VT220-UG-003) VT220 Installation Guide (EK-VT220-IN-002) VT220 Programmer Pocket Guide (EK-VT220-HR-002) It also contains the following: VAX Language-Sensitive Editor VAX Fortran Pocket Guide (AA-EV45A-TE) MicroVMS User's Pocket Reference (AA-Z211C-TE) MicroVMS Programming Pocket Reference (AA-Z214B-TE) These are all free to whoever wants them (unless any of the Bitsavers guys need them for scanning, in which case they get first refusal). You pay shipping. Usual 21 days before they get recycled, so move fast. Replies by private mail please. Ed.

19 years, 11 months

TMS9980/9901

by river＠zip.com.au

Hi, Does anyone know where I can get TMS9980 and TMS9901 chips from? They're never on eBay. I tried a chip broker who had a large stash, but he wanted 200USD per chip! I'm trying to get my old TM99/U89 system going and the 9980 and 9901 chips have corroded badly and lost a leg or two. I've been told the 9980 was in some old pin-ball machines, so I'm currently hunting down these sites to verify this. seeyuzz river

19 years, 11 months

Emulex MT03 available

by ddl-cctech＠danlan.com

Anybody want it? This is a SCSI/QIC44 bridge. Dan Lanciani ddl(a)danlan.*com

19 years, 11 months

Slightly OT: DOS programs in Win XP

by news＠computercollector.com

A while ago I asked if anyone on the list could help me get AutoCAD 12 for DOS. Several people came through and I now have a copy. Thanks, everyone! As expected though, it doesn't work and play nicely with Windows XP. I was hoping that just running it through a command prompt window and giving that giving the Win 95 compatibility attribute to the acad.exe file would make it work. It didn't and I got a strange error message: "Phar Lap err 74: Can't use -REALBREAK under this version of DPMI" So I Google that and found a few threads like this one: http://discussion.autodesk.com/thread.jspa?threadID=314 Apparently it's just not possible to run Acad 12 in 'real' DOS in XP. I already knew XP's prompt is nothing close to real DOS, but I was hoping to find a way to trick the program, or a way to emulate DOS perhaps. Anyone have a clever solution to this? (I do have a suitable second PC to install real DOS on, but I'd rather not have to dedicate a whole system just to use one program.) ===== Tell your friends about the Computer Collector Newsletter! -- It's free and we'll never send spam or share your email address -- Publishing every Monday(-ish), ask about writing for us -- Mainframes to videogames, hardware and software, we cover it all -- W: http://news.computercollector.com E: news(a)computercollector.com -- 628 readers and counting!

19 years, 11 months

NICE hp box on epay

by jwest＠classiccmp.org

Hey HP fans... Check out item # 5154313481 on ebay. I have a stash of these, but none I want to get rid of yet. Evenso, I was tempted by this one. It's a 2100A, looks to be very good condition, and stuffed with a lot of really nice cards. The seller put up some really nice photos of the all over the unit and you can enlarge all of them to read the fine print on all the card handles. That system is pretty decked out... 32KW core, several 8-bit dup reg boards, several CRT interfaces (I'd like one of those). 7970 Mag tape, 13210 (7900A) disc controller set. Very nice. If you're not an HP fan, you really should check out the front panel pictures. Gorgeous - but then I'm biased :> Jay West

19 years, 11 months

Speaking of eBay

by dwight.elvey＠amd.com

Hi It is true that capacitors can have nonlinear effects. In most cases, the design is such that these effects are vary small and only in cases where the capacitor is used as a filter parameter that has a sharp cut off, does this have measurable effects. This means that blindly replacing all the capacitors is just plain silly. Speaker wire is another interesting one. All wire has impedance ( DC and AC effects ). No wire will ever be the right impedance for an 8 Ohm speaker. Different speakers are effected differently by the speaker wire. I've done some AB test with wire and for at least two speakers, I looked at. I could hear no difference between 6 feet of 12 ga. appliance cord and woven special speaker wire. I doubt my hearing is good enough today to repeat such test but at the time my heard was better than average, being able to clearly hear TV horizontal outputs from any TV across the room. Dwight >From: "Geoffrey Thomas" <geoffreythomas(a)onetel.com> > >Electronics World ran a series of articles called " capacitor sound " from >July 2002. >-Discussing how capacitor construction can affect the sound of a hi-fi amp. >The author , Cyril Bateman , also did a few articles on loudspeaker cable >sound , but I can't find those at the moment. > >Geoff. > >----- Original Message ----- >From: "Vintage Computer Festival" <vcf(a)siconic.com> >To: "General Discussion: On-Topic and Off-Topic Posts" ><cctalk(a)classiccmp.org> >Sent: Wednesday, December 29, 2004 10:31 PM >Subject: RE: Speaking of eBay > > >> On Wed, 29 Dec 2004, Tom Jennings wrote: >> >> > I'll believe anything with sufficient evidence, but solder alloys >> > in a solder joint sounds like total crap to me -- unless I had >> > a lot of rolls to offload on fools with more money than I ... :-) >> >> That's the thing mainly with these crazy audiophiles. Except for the two >> examples you bring up, which seems like they have a technical basis to the >> theory, most of it is just voodoo hocum that doesn't have any underlying >> technical or scientific basis. One loon comes up with a wacko theory and >> then it propagates until everyone is demanding special-alloy solder. Why? >> They don't know, and they don't care. Some guy said it makes the >> electrons happy so they have to get some too. It's completely naive. >> >> I want to see technical treatises explaining WHY, with scientifically >> executed experiments backed up with empirical data, before I believe any >> of this nonsense. I think these audio guys ought to demand the same. >> They might save a few bucks. >> >> -- >> >> Sellam Ismail Vintage Computer >Festival >> -------------------------------------------------------------------------- >---- >> International Man of Intrigue and Danger >http://www.vintage.org >> >> [ Old computing resources for business || Buy/Sell/Trade Vintage >mputers ] >> [ and academia at www.VintageTech.com || at >http://marketplace.vintage.org ] >> >> >> >> >> -- >> No virus found in this incoming message. >> Checked by AVG Anti-Virus. >> Version: 7.0.298 / Virus Database: 265.6.6 - Release Date: 28/12/04 >> >> > > > >-- >No virus found in this outgoing message. >Checked by AVG Anti-Virus. >Version: 7.0.300 / Virus Database: 265.6.8 - Release Date: 03/01/05 > >

19 years, 11 months

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test-drb January 2005