- test-drb@ccmp.vtda.org - classiccmp.org

by dburrows＠netpath.net

See comments below. -----Original Message----- From: Chuck McManis <cmcmanis(a)mcmanis.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Friday, December 17, 1999 9:01 PM Subject: H9278-A is this Q/CD or Q/Q >I'm trying to bring a Vaxstation 3200 back to life. It had been depopulated >but I've got all the boards. It is in a BA23 chassis. Now my previous >experience with uVAXen in BA23's was that the first 3 slots were Q/CD and >the rest were Q/Q with a serpentine bus. However trying to set up the >boards this way yielded some very strange results. Not the least of which >was no response by the disk controller. Caused by the blank in slot 2 >The other oddity was the dual hard drive control switches on the panel. The >chassis is marked: > VS31V-B2 >Which the module database lists as: > 650QV-A2,CLR,MS650-AA,VCB02,DELQA-M,CK-DELQA-YP,2 M9047,BC18Z-25,120V > >If I read this correctly, then the stock configuration on this box was: >1 KA660 ---------------- >2 clear >3 MS650-AA -------------Move up to 2 and insert grant here (M9047) on left side >4 VCB02 >5 VCB02 (4 plane) >6 VCB02 (4 plane) >7 DELQA M09047 >8 M9047 ??? Insert disk controller here. > >The backplane is marked Micro-11 and H9278-A which is described as: > Q22 BUS BACKPLANE, 8 QUAD SLOTS > >Which sounds a whole lot like Q/CD all the way down to me. Anyone know for >sure? I'll be trying it out shortly so I may figure it out empirically. :-) > Slot 1,2 and 3 have the grant on the left. The right side is reserved for memory interconnect. >I guess the real question is "Quad slot" code for "Q/CD" slot? No - Quad wide connector. Q/CD has the right side "reserved" like on a ba213. Q/Q is the serpentine section Dan > > >--Chuck >

26 years, 6 months

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H9278-A is this Q/CD or Q/Q

by cmcmanis＠mcmanis.com

I'm trying to bring a Vaxstation 3200 back to life. It had been depopulated but I've got all the boards. It is in a BA23 chassis. Now my previous experience with uVAXen in BA23's was that the first 3 slots were Q/CD and the rest were Q/Q with a serpentine bus. However trying to set up the boards this way yielded some very strange results. Not the least of which was no response by the disk controller. The other oddity was the dual hard drive control switches on the panel. The chassis is marked: VS31V-B2 Which the module database lists as: 650QV-A2,CLR,MS650-AA,VCB02,DELQA-M,CK-DELQA-YP,2 M9047,BC18Z-25,120V If I read this correctly, then the stock configuration on this box was: 1 KA660 ---------------- 2 clear 3 MS650-AA ------------- 4 VCB02 5 VCB02 (4 plane) 6 VCB02 (4 plane) 7 DELQA M09047 8 M9047 ??? The backplane is marked Micro-11 and H9278-A which is described as: Q22 BUS BACKPLANE, 8 QUAD SLOTS Which sounds a whole lot like Q/CD all the way down to me. Anyone know for sure? I'll be trying it out shortly so I may figure it out empirically. :-) I guess the real question is "Quad slot" code for "Q/CD" slot? --Chuck

26 years, 6 months

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PDP11

by nate＠nutopia.org

hi, I'm resurrecting a pdp-11/05 (hopefully) but I don't have anything in the way of docs. I was wondering if anyone could send me some info on a) the power connectors (I'm slowly trying to trace them around to make sure it's ok - I don't really trust a 25 year old power supply too much (-: ) and b) info about the current-loop interface. I'd like to convert it to ttl or rs/232 but I haven't been able to find any docs on the subject of current loops so all my info right now is speculation )-: thanks, -Nate Grady nate(a)logicprobe.org / nate(a)nutopia.org / nate(a)netsync.net (etc...) http://nate.nutopia.org "Diplomacy is the art of letting the other party have things your way." -- Daniele Vare "In the beginning the Universe was created. This has made a lot of people very angry and been widely regarded as a bad move." --Douglas Adams

26 years, 6 months

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PDP-8/L and TTY stuff (was Re: TTY and current loop questions)

by ethan_dicks＠yahoo.com

--- Tony Duell <ard(a)p850ug1.demon.co.uk> wrote: > > > Do you have the 3 grey books for the ASR33? Volume 1 of the maintenance > > > manual covers lubrication. > > > > If I do, it's long buried. BTW, are these 8.5"x11" paper or 11"x17" paper? What's the synopsis for the area around the > Well, the general idea is to clean and dry the type cylinder and the > hammer face... One thing that I did mention and I'll mention again is that my hammer face is not original - I stuck on a rubber sticky foot and I suspect that it is part of the problem. I read here recently that someone has had luck with carved pink pearl erasers, but I haven't tried that. Worst case is I can nab the printing mechanism out of my wire-service TTY, the one with the 110 baud data set (modem) built into the pedestal. It doesn't fix this one, but it does get me up and running more quickly. The other thing that sticks is the line-feed mechanism. I can see the pawl on the back side of the ratchet at the left of the main roller and it doesn't always spring back up. Presumably it's another lube job waiting to happen. Neither of these teletypes has been stripped down in the 13+ years that I've owned them. To make matters worse, neither one has been powered on in ten years. I haven't had time to work with my classic machines until this year. > However, if it's actually sticking, then either something is bent or the > old oil is gumming it up (probably the latter). In which case _I'd_ > dismantle the carriage totally, clean all the parts in a suitable > solvent, put it together and oil it. I can get for under $15 a disposable carburetor solvent bath-in-a-can at a local auto parts store. Presumably, this is a suitable solvent. The print mechanism should fit nicely for immersion. > I did my first teletype without the manuals, but unless you had a > misspent youth like me dismantling and reassmbling everything in sight, > I'd not recomend it... With the manuals it's not too hard if you're > generally OK with hand tools. I used to disassemble sewing machines as a youth. I never tried putting them back together, but I'm OK with hand tools. I just repaired the works of an upright piano that I was gifted with - its problem was dried and cracked glue joints on one key mechanism and the entire damping bar. Obviously, a teletype has more moving parts than a piano, but there is a superficial resemblence. > > How many types/grades of lubricants are there for a proper lube job on a > TTY? > > 2 AFAIK. One is an oil. It's a light-ish (SAE 10 or thereabouts) engine > oil. I normally use the lighter of the 2 oils recomended for my Myford > lathe, as it's about right and I have an oilcan of it anyway. But any > light machine oil (NOT WD40!!) is OK. Sewing machine oil? "Three-in-one" brand general-purpose oil? Am I on the right track here? > The other is a grease. Just general-purpose high melting point grease, > like you'd use on a car (Oooops, modern cars don't have grease points > :-(). Castrol LM or something like that. I also restore Volkswagens. I know what a grease fitting is and how to operate a grease gun. (As an aside, I just got a 1975 Microbus in operating shape for $300 - it needs some work in the fuel injection system, but otherwise OK). > If you can find the manuals, I can talk you through taking the carriage > out and apart (the manaul is not that clear in places). Without them it's > going to be more difficult, if only because of problems in refering to > parts (with the parts list I can use Teletype part numbers). Maybe someone will eventually scan a set it as was mentioned here. Alternatively, there is always the route of borrowing, xoxing and returning a set. I was looking at things again tonight... the -8/L is not 100%. I had to remove the PSU to fix the loose fuse holder - it wasn't just loose, the side lug had a cold joint on it. I had to remove the mains-in and mains-out sockets to get room for my tools, but all is well on that front now. The problem is that the machine does not correctly run the RIM loader. If I put a halt (7402) instruction in low core, location 0, say or even 20 and I run the RIM loader, after reading in one character, the CPU halts at that low core instruction. If I single step things, it does not wander off into low core. Another wierd symptom is that pressing the START switch increments the PC address, but only on the same page (i.e., 7777 becomes 7600) OTOH, some programs do work. I wrote a quick-n-dirty echo test. It works fine with my VT220... 0200 6032 KCC 0201 6031 KSF 0202 5201 JMP .-1 0203 6036 KRB 0204 6046 TLS 0205 6041 TSF 0206 5205 JMP .-1 0207 5200 JMP 0200 Nevertheless, the RIM loader fails if I put the CPU in RUN mode without the single-step switch thrown. Back to the drawings. Sigh. Thanks again for the good info. -ethan ===== Infinet has been sold. The domain is going away in February. Please send all replies to erd(a)iname.com __________________________________________________ Do You Yahoo!? Thousands of Stores. Millions of Products. All in one place. Yahoo! Shopping: http://shopping.yahoo.com

26 years, 6 months

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PDP-8/L and TTY stuff (was Re: TTY and current loop questions)

by ethan_dicks＠yahoo.com

--- Christian Fandt <cfandt(a)netsync.net> wrote: > The above lube info should get you started with bringing life back into > your 33. > > Regards, Chris As of today, it's not just mine that needs work... a long-time geek friend of mine was at our usual Friday Geek Chinese Lunch (17 years in the same restaurant!). I asked him about TTYs. I mentioned that he has four of various models in various states and wants to end up with one cleaned up unit and one set of docs. He has a couple KSR-33s, one KO-33(?) and one ASR-33. Some are missing covers, most are missing pedestals, none are fully up and running. The plan is to help him get one good set going and then I get to haul away the remainders as parts (unless I can get something working out of what's left). Maybe I'll go over to his house and learn on *his* equipment, then go home and work on my own. ;-) Nah... I'm too impatient to wait that long... I _really_ want to get an LT-33 up and running for my -8s. -ethan ===== Infinet has been sold. The domain is going away in February. Please send all replies to erd(a)iname.com __________________________________________________ Do You Yahoo!? Thousands of Stores. Millions of Products. All in one place. Yahoo! Shopping: http://shopping.yahoo.com

26 years, 6 months

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PCjr Error Codes

by swolfe1＠mail.gcnet.net

I just got a PCjr, with a Quadram Floppy drive extension, and a parallel sidecar... It worked fine for a couple days, and then I booted it up and it checked up to 128k, and then reported Error A... does anyone have an error code list for the PCjr?

26 years, 6 months

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IBM XT available (fwd)

by dpeschel＠u.washington.edu

I'm forwarding this for a non-subscriber. Remember to reply to the original sender (paulkruse(a)juno.com). > Here's someone wanting to find a new home for an IBM PC/XT. Please reply > to the original sender. > > Reply-to: paulkruse(a)juno.com > > > ---------- Forwarded message ---------- > Date: Sun, 12 Dec 1999 01:23:04 -0800 > From: Paul Kruse <paulkruse(a)earthlink.net> > Subject: I would like to donate IBM PC/XT > > I have an IBM XT, keyboard & monitor, in good working condition that is > not being used. > > Please reply to paulkruse(a)juno.com as I may not carry this email address > for long.

26 years, 6 months

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TTY and current loop questions (was Re: 20mA cabling questions)

by ethan_dicks＠yahoo.com

--- Tony Duell <ard(a)p850ug1.demon.co.uk> wrote: > > > > > > The PDP-8/L restoration continues. I have two devices to attach to my -8/L > > for testing - a VT220 (all have 20mA current-loop connectors) and an > > ASR-33. > > OK, first thing to do is to clean and oil (correctly!) that ASR33. If > parts are sticking, there's a reason for it, either no oil or old, > gummed-up oil. Carrying on running it like this will cause wear and/or > damage. I have intentionally not run the TTY for more than a few lines just for this reason. > Do you have the 3 grey books for the ASR33? Volume 1 of the maintenance > manual covers lubrication. If I do, it's long buried. What's the synopsis for the area around the print hammer/type cylinder? Some letters print OK, some don't. The ones that don't do OK for the first one, but as I said, I have to manually press the cylinder back down to its locking position. How many types/grades of lubricants are there for a proper lube job on a TTY? > Reader run is another loop (and it's not part of the 'standard' loop > setup). Right. I located the conversion manual in the back of some 11/20 docs - how to turn a factory-fresh TTY into a DEC-modified ASR-33. > According to a PDP8/e printset, the pinout of the 8-pin mate-n-lock... > I seem to remember that's 'standard' on DEC devices. You may well need > the equiavlent of a null-modem cable to link a VT220 to the card (swap > (2,3) and (5,7)). That's the kind of thing I was looking for. > A word of warning. THere are several versions of the COM8116. The > 'standard' one, as used by Radio Shack in the TRS-80 uses a 5.0688MHz > clock. I have the standard one. We used it in an optional modem eliminator option for our sync serial boards. I have the xtals, too. Thanks for all the good info, Tony. Now if I could only locate the box of 20mA cables in the attic... -ethan ===== Infinet has been sold. The domain is going away in February. Please send all replies to erd(a)iname.com __________________________________________________ Do You Yahoo!? Thousands of Stores. Millions of Products. All in one place. Yahoo! Shopping: http://shopping.yahoo.com

26 years, 6 months

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Intro msg: Teraks, emulators, reviving cassette data

by jfoust＠threedee.com

Why, I thought I'd get a few replies about my Terak computer collection, as described in my intro message on 11/18. Anyone out there have any experience with these? - John www.threedee.com/jcm

26 years, 6 months

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PDP-8/L and TTY stuff (was Re: TTY and current loop questions)

by ethan_dicks＠yahoo.com

--- CLASSICCMP(a)trailing-edge.com wrote: > >One thing that I did mention and I'll mention again is that my hammer face > >is not original - I stuck on a rubber sticky foot and I suspect that it is > >part of the problem. I read here recently that someone has had luck with > >carved pink pearl erasers, but I haven't tried that. > > I think that was me. The erasers aren't nearly as durable as the > original heavy rubber (after all, erasers *are* designed to wear away!) > hammer face, but they are easily carved. I just ordered some replacement rubber hammer faces from Western Numeric Control along with some oiled paper tape and a couple of paper rolls. I don't have an exact total, but I just dropped about a hundred bucks including shipping. Fortunately for my pocket book, I have several boxes of dry fan-fold tape for my high-speed punch. I just checked the box - some black, some grey and one box of genuine "PDP" papertape from DEC. Now back to cleaning and lubrication. -ethan ===== Infinet has been sold. The domain is going away in February. Please send all replies to erd(a)iname.com __________________________________________________ Do You Yahoo!? Thousands of Stores. Millions of Products. All in one place. Yahoo! Shopping: http://shopping.yahoo.com

26 years, 6 months

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PDP-8/L and TTY stuff (was Re: TTY and current loop questions)

by ethan_dicks＠yahoo.com

--- Chuck McManis <cmcmanis(a)mcmanis.com> wrote: > Of course Western Numerical control sells replacement pads for $3-$4 and > they work as designed so why would you even want to try a kludge? > (www.westncinc.com IIRC) Thanks for the tip. I knew someone sold them. I'll be placing an order today. I need some paper rolls anyway. I'm down to a couple of very oxidized and brittle ones. I might as well order a couple of rolls of oiled tape. All I have right now is the fanfold stuff for my PC8I (I know it works, but I want some rolled stuff that won't have creases to catch in the TTY reader). -ethan ===== Infinet has been sold. The domain is going away in February. Please send all replies to erd(a)iname.com __________________________________________________ Do You Yahoo!? Thousands of Stores. Millions of Products. All in one place. Yahoo! Shopping: http://shopping.yahoo.com

26 years, 6 months

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Commodore computer equipment in pristine condition

by SUPRDAVE＠aol.com

In a message dated Fri, 17 Dec 1999 8:58:00 AM Eastern Standard Time, Jeff Salzman <relayer(a)dotplanet.com> writes: > I have the following items for auction on eBay. I'm thinning out my collection > of extras. These items are VERY well taken care of and include the original > manuals (also in great shape). The auctions end Sunday evening, Dec 19. > > Commodore 64 > http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=221651946 > > Commodore 1541, white tone > http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=221617803 > > Commodore 1802 Monitor > http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=221646174 > > Seikosha SP-1000VC Dot Matrix Printer > http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=221605811 > > If you are looking for other Commodore items, let me know. I may have a spare that I can part with. > > Jeff Salzman Well, if you DO have more commodore items, why dont you offer them to members of the group FIRST, before selling on epay?? oh, i get it...more money that way.

26 years, 6 months

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More eBay rambling, and the human factor

by SeaMasterZ＠aol.com

In a message dated 12/16/99 6:42:34 PM Eastern Standard Time, mikeford(a)socal.rr.com writes: << BTW the advice given freely on this list is beyond price, $10 would be an insult, $500 is more like what some of its worth. >> You know, that made me think about the gigabytes of human knowledge that is the engine behind this list, its stunning if you think about it, the "man" hours (women hours too, knuckle dragging Neanderthal here :o)~ involved in acquiring the knowledge and the collective pool that it represents ... mind boggling. And so, yet another question, this time on a truly ancient computer ... have any studies been done on estimating the speed and capacity of the human brain? I'm strictly a commodore 64, but there are some pentium III types out there ... as usual, just curious, thanks gang. Ray Cook

26 years, 6 months

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PDP-8/L and TTY stuff (was Re: TTY and current loop questions)

by CLASSICCMP＠trailing-edge.com

>One thing that I did mention and I'll mention again is that my hammer face >is not original - I stuck on a rubber sticky foot and I suspect that it is >part of the problem. I read here recently that someone has had luck with >carved pink pearl erasers, but I haven't tried that. I think that was me. The erasers aren't nearly as durable as the original heavy rubber (after all, erasers *are* designed to wear away!) hammer face, but they are easily carved. I never saw any troubles in my ASR33 related to grunge wearing off the carved eraser, but then again I only ran it for a few hundred hours :-). -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927

26 years, 6 months

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Help identify a Control Data piece

by nerdware＠laidbak.com

A friend of mine who deals in surplus stuff got a piece in that I'm not familiar with. It resembles a RTR tape drive, but it doesn't have any heads AFAICT. Has the CD logo on it and some wording about changing knives.... This leads me to believe it's either something to do with paper tape or a mylar tape slitter. Any ideas? Paul Braun NerdWare -- The History of the PC and the Nerds who brought it to you. nerdware(a)laidbak.com www.laidbak.com/nerdware

26 years, 6 months

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Commodore computer equipment in pristine condition

by relayer＠dotplanet.com

I have the following items for auction on eBay. I'm thinning out my collection of extras. These items are VERY well taken care of and include the original manuals (also in great shape). The auctions end Sunday evening, Dec 19. Commodore 64 http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=221651946 Commodore 1541, white tone http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=221617803 Commodore 1802 Monitor http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=221646174 Seikosha SP-1000VC Dot Matrix Printer http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=221605811 If you are looking for other Commodore items, let me know. I may have a spare that I can part with. Jeff Salzman

26 years, 7 months

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Help identify a Control Data piece

by aek＠spies.com

It is a mag tape cleaner. Eric Smith was looking for one a while back.

26 years, 7 months

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Help identify a Control Data piece

by CLASSICCMP＠trailing-edge.com

>A friend of mine who deals in surplus stuff got a piece in that I'm >not familiar with. It resembles a RTR tape drive, but it doesn't have >any heads AFAICT. Has the CD logo on it and some wording >about changing knives.... This leads me to believe it's either >something to do with paper tape or a mylar tape slitter. > >Any ideas? Especially with the wording about "changing knives" and "doesn't have any heads", it sounds like a tape cleaner. Tim.

26 years, 7 months

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ID this light pen

by rigdonj＠intellistar.net

Can anyone id this light pen? "http://www.intellistar.net/~rigdonj/misc/lpen.jpg". It looks like it was built into the body of a standard ink pen. The components on the circuit board are covered with a black tar looking substance giving the board a bumpy look. There is a male card edge connector sticking out of the reverse side on the circuit board. There is a label on the pen that says "3G Gaston, Or. (503) 662-4492". Joe

26 years, 7 months

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Good Day

by jrkeys＠concentric.net

Well today was great I got the following all free just to haul it away !!!! 1. Commodore SX-64 portable not tested yet. 2. 14 cartridges for Vic20, C64. 3. 6 Softsmith cassette games for Vic20/C64 4. OSBORNE portable with mfg date of 7-17-82 have not fired it up yet. 5. Commodore C2N cassette player 6. 1541 drives 7. Tons of C64 software on diskettes, a large box full have not looked at it all 8. Another box of PC software, all types none 10 years old yet 9. A MPS-803 printer in the box like new. 10. Some Mac Plus stuff, KB and fan unit that goes on top. 11. Seiko UC-2200 handheld with Application Rom Pack UX012, built in printer, missing AC adapter for it. On back unit it also says Controller model UM01-020 ? 12. A couple more boxes full of stuff not 10 years old, all in all a pretty good haul for free. This same guy told me about another shop owner that is cleaning out all of the computer items in his shop and will give it away if someone hauls it all with NO picking. I hope to go over there Monday afternoon and pickup everything that he has. I was told he has some computers built in the 70's in a back room that he will toss out also. Will list the items next week if I'm lucky to get there before the trashman.

26 years, 7 months

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House cleaning sale: AT&T 6300 GWBASIC & PS2 mdl 55SX manuals

by rigdonj＠intellistar.net

Found these books while house cleaning. (1) "Programmer's Guide, AT&T Personal Computer 6300 GWBASIC By Microsoft". Perfect condition in AT&T 3 ring binder. $10 plus 3.20 for priority mail. (the 6300 was made by Olivette and was a 8086 powered MS-DOS computer.) (2) Two clear plastic envelopes containing "IBM Personal System/2 Model 55 SX Quick Reference" and other papers/manuals and a disk. Never opened. $5 ea plus $3.20 for priority mail. Email directly if you're interested. Joe

26 years, 7 months

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ADM5 or Votrax docs?

by mikem＠subether.com

Hi, Anyone happen to have any reference (or maintenance/schematics) documentation for an ADM-5? Also looking for configuration/operation info on a Votrax Personal Speech System Model 200. Thanks! - Mike

26 years, 7 months

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Wanted: Dec M7260 card

by rigdonj＠intellistar.net

I need a card for a PDP 11/05. It's a M7260 (KD11-B Board #1: Data Paths). Does anyone have one that you're willing to part with for a reasonable price? Joe

26 years, 7 months

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Trade Massbuss for LP card?

by jpl15＠netcom.com

In the 11/44 system which is now occupying my evenings... there are three Massbuss adaptors [M5904]. I actually have an RA90+power supply out in the garage, condition unknown at this time.. I don't know anything at all about the Massbuss and it's peripherals, save that its serial and kinda fast. I have a DataProducts P300, that I think DEC called an LXY11... at any rate , this printer has a DataProducts standard interface. I believe there exist several Unibus cards that speak the Dataproducts protocol, I just can't find them in all the manuals around here. Yet. Would anyone like to have one (or two) of these M5904s in trade for a Unibus <-> DataProducts P300 card (and very hopefully cable)?? What are the general spec for an RA90? Is it worthwhile even attempting to attach it to the System? Another question: Has anyone any suggestions re: a good communications program for the 11/44 under RSTS/E? Cheers... and Best of the Season John

26 years, 7 months

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USUS Pascal software library now online

by jfoust＠threedee.com

A few weeks ago, someone sent me the disk images of their cache of the USUS Software Library, a collection of Pascal code dating from approximately 1978 to 1981. They sent volumes 1 through 29 of the US collection and volumes 3 and 4 of the USUS UK collection. After a few years of casual Web research, I've been unable to find anyone who'd admit to being the last of the Mohicans who ran this group. The collection is now online. I'd added a new section to my Jefferson Computer Museum at <http://www.threedee.com/jcm/> containing a short description of the USUS user group, the catalog of the files in the disks I have, and links to downloadable Zip files containing both .SVOL disk images and plain DOS text files that should be accessible to today's users. I improved my UCSD P-System disk tools to handle these .SVOL disk images. Windows executables of these are online, too. (My RT-11 disk tools were recompiled as result.) - John

26 years, 7 months

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Likely museum piece

by xds_sigma7＠hotmail.com

Mike, Well, it doesn't have too much appeal as just a platter... it would have to be at least a disk pack, not just a single platter. Of course, the entire drive would be the best thing. Will J ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

26 years, 7 months

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"DB9"

by Philip.Belben＠powertech.co.uk

Tony, quoting I can't remember whom: >> I once had a Mistubishi monitor which used a 'B'-shell with three coax >> connectors in it along with eight or nine signals on what looked to be >> otherwise standard pins. Just yesterday I discarded a badly damaged > > There's the 13W3 used on Sun workstations -- 3 coax pins and 10 normal > pins IIRC. B size shell, I think. It is indeed a B shell. The pins are numbered 1 to 5 (row at long edge of D), 6 to 10 (row at short edge), A1 A2 and A3 (coaxen), the ordinary pins being between A1 and A2. Goodness knows why it's sitting on my desk - I don't have a monitor to fit it (it's an adapter for Sun monitors into VGA cards that came with our sparcbook at work FWIW) Also for what it's worth, the Sun connector I have here is a D socket wit coax plugs embedded in it. ISTR IBM used an A-size shell with just the 3 coaxen on some of their monitors (6019 springs to mind). Dick Erlacher, earlier in the discussion: > The way I learned it was that the 'D' refers to the shape, the 'B' to the > shell size, and the number to the maximal pin count. The spacing is not > .050" however. It seems to me that it's larger than 0.10" andnot less, > except in the high-density versions like the DE15. How nice. Two apparently inconsistent answers, both of which are correct! The spacing between pins along a row is I think 0.1 inches. The spacing between rows I think is also 0.1 inches. So from a pin in one row to a pin in the other is around .112 inches, the "larger" spacing that Dick notes. However, if you move along the length of a D plug, every 0.05 inches there is a pin, and they line up nicely with 0.05 inch pitch ribbon cable (making the ribbon cable versions (marginally) easier to make than those for a 0.1" square matrix connector). And this is what I think our earlier correspondent meant by 0.05 inch spacing. Philip. ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept for the presence of computer viruses. Power Technology Centre, Ratcliffe-on-Soar, Nottingham, NG11 0EE, UK Tel: +44 (0)115 936 2000 http://www.powertech.co.uk **********************************************************************

26 years, 7 months

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OHIO Scientific Model 600 Roms wanted

by 101.246057＠germanynet.de

Hello there, I need rom dumps of an Ohio Scientific Model 600, cause on the board i own the rom or roms are missing. yours Herbert

26 years, 7 months

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Likely museum piece

by edick＠idcomm.com

Because of its size it will be tempting to mount it as the face of a clock, though. Without the rest of the hardware to make it work (which it probably didn't to all that well anyway) it isn't that interesting as a museum piece. It might as well stay where it is. Dick -----Original Message----- From: Chris Kennedy <chris(a)mainecoon.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Thursday, December 16, 1999 9:09 AM Subject: Re: Likely museum piece >Mike Ford wrote: > >> I mentioned it once before, but there is a surplus guy down here in Socal >> with a 42 inch platter out of a Bryant hard drive hanging on his wall. I >> suspect not that high of an offer from a formal institution would pry it >> loose. Isn't this something that belongs in a museum? > > >Bryant disk? Wasn't that the water cooled thing with the platters mounted >in the vertical plane (that is, 90 degrees to what we're generally used to)? >Last time I saw one of those it was being used as a sort of swap drive >hanging off a customer built channel controller on a CDC6600 at LBL, >must have been 1976. It was a relic even then. > >Seems like the platter belongs almost anywhere else other than on the >wall of some surplus shop... > >-- >Chris Kennedy >chris(a)mainecoon.com >http://www.mainecoon.com >PGP fingerprint: 4E99 10B6 7253 B048 6685 6CBC 55E1 20A3 108D AB97

26 years, 7 months

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(Fwd) [HP3000-L] HP70 Classic etc available

by ss＠allegro.com

Contact the sender (g.mitchell(a)COMPUTER.ORG), not me! ------- Forwarded message follows ------- Date sent: Wed, 15 Dec 1999 16:23:11 -0500 Subject: [HP3000-L] HP70 Classic etc available Organization: RoadRunner Portland, Maine From: g.mitchell(a)COMPUTER.ORG To: HP3000-L(a)RAVEN.UTC.EDU Send reply to: g.mitchell(a)COMPUTER.ORG Wondered if any of you museum curators/marina operators would be interested in parts/pieces of an HP-3000 Series 70 we're deinstalling next week? Usual stuff: 16Meg Kelly card, 4Meg EMC cards, 1 meg HP cards, GIC's, LANIC, IMBs, ATPs, a disk cabinet (19514A - for 670/7937 disks) and 670XP and 7937XP disks. -- Glenn A. Mitchell Mailto:g.mitchell@computer.org 3GM Associates, Inc Portland, ME 04102 207-772-9370 ------- End of forwarded message ------- Stan Sieler sieler(a)allegro.com www.allegro.com/sieler/wanted/index.html www.allegro.com/sieler

26 years, 7 months

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An easy one (after that db9 debacle!)

by edick＠idcomm.com

OOPS! I missed one . . . one of my pre-Seagate CDC drives does indeed use 220/330 termination resistor packs. It's the only one, as it turns out. Oddly enough, the MAXTOR, CDC, and Micropolis drives don't care whether the R-pack is installed or not, but the Miniscribe models won't work without them. Dick -----Original Message----- From: Don Maslin <donm(a)cts.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Wednesday, December 15, 1999 11:42 PM Subject: Re: An easy one (after that db9 debacle!) > > >On Wed, 15 Dec 1999, Chuck McManis wrote: > >> Ok, so my choice of terms was poor, y'all understood what I meant :-) >> >> This one should be easy. I've got an ESDI drive, I know that at one time it >> had termination resistors in it, I know that I pulled them out, I put them >> into my "drawer of misc resistor packs", they are effectively invisible :-) >> >> What is the resistor values for the term pack? 220/330? >> >> --Chuck > >That is what I have always found/used. > > - don > >

26 years, 7 months

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An easy one (after that db9 debacle!)

by cmcmanis＠mcmanis.com

Ok, so my choice of terms was poor, y'all understood what I meant :-) This one should be easy. I've got an ESDI drive, I know that at one time it had termination resistors in it, I know that I pulled them out, I put them into my "drawer of misc resistor packs", they are effectively invisible :-) What is the resistor values for the term pack? 220/330? --Chuck

26 years, 7 months

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An easy one (after that db9 debacle!)

by edick＠idcomm.com

... and it was a DE9 debacle! . . . Dick -----Original Message----- From: Tony Duell <ard(a)p850ug1.demon.co.uk> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Wednesday, December 15, 1999 7:14 PM Subject: Re: An easy one (after that db9 debacle!) >> This one should be easy. I've got an ESDI drive, I know that at one time it >> had termination resistors in it, I know that I pulled them out, I put them >> into my "drawer of misc resistor packs", they are effectively invisible :-) >> >> What is the resistor values for the term pack? 220/330? > >Almost certainly. May be marked 221331 (==22*10^1, 33*10^1). I would >guess the pinout is one of the standard ones (SIL with the common pins at >the ends, DIL with the common pins at the top right and bottom left corners) > >The latter assumption is not always valid. I once worked on a floppy >drive that was corrupting disks. The cause was the termination resistor >pack. It was a 9 pin SIL, but instead of having the common pin at one end >(marked by a dot), it had it in the middle. The correct resistor pack was >symmetrical, therefore. Somebody had put in a normal resistor pack, and >the result was that all sorts of signals got coupled together. Finding >that fault was entertaining to say the least. > >-tony >

26 years, 7 months

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An easy one (after that db9 debacle!)

by edick＠idcomm.com

It appears that most of my ESDI drives, including MAXTOR, Miniscribe, CDC/Seagate, and Micropolis, all seem to use 150-ohm resistors. I thought I had at least one around here that used the 220/330 type. Dick -----Original Message----- From: Tony Duell <ard(a)p850ug1.demon.co.uk> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Wednesday, December 15, 1999 7:14 PM Subject: Re: An easy one (after that db9 debacle!) >> This one should be easy. I've got an ESDI drive, I know that at one time it >> had termination resistors in it, I know that I pulled them out, I put them >> into my "drawer of misc resistor packs", they are effectively invisible :-) >> >> What is the resistor values for the term pack? 220/330? > >Almost certainly. May be marked 221331 (==22*10^1, 33*10^1). I would >guess the pinout is one of the standard ones (SIL with the common pins at >the ends, DIL with the common pins at the top right and bottom left corners) > >The latter assumption is not always valid. I once worked on a floppy >drive that was corrupting disks. The cause was the termination resistor >pack. It was a 9 pin SIL, but instead of having the common pin at one end >(marked by a dot), it had it in the middle. The correct resistor pack was >symmetrical, therefore. Somebody had put in a normal resistor pack, and >the result was that all sorts of signals got coupled together. Finding >that fault was entertaining to say the least. > >-tony >

26 years, 7 months

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Anyone familiar with NeXT harware out there?

by ndiablo＠diablonet.net

Hi! I've got an original 68030 NeXT Cube workstation that i've had for about a year and I can't get it to power up anymore.. The system used to work great; has been unplugged for the last few months pretty much just sitting there, so I dont see how much harm could have come to it.. The only thing I can think of is perhaps the system battery might be too low, and as a result, the soft power switch on the system (via keyboard) is not working anymore.. I was reading around 2v on a 3v battery... Anybody out there know if this is even plausible (or can suggest any alternative issues that might be coming up)? :( Thanks, -Sean Caron (root(a)diablonet.net)

26 years, 7 months

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argh, VAX DB-9 pinout?

by edick＠idcomm.com

Now that everybody's in sync with the deifinitions of the other details, it is well to remember that there's a suffix for gender. The shell filled with plastic hosting the female pins is suffixed '-S' (socket) and the male with the obviously male pins, is suffixed '-P' for PLUG. That's the whole spec ... shape, size, standard maximum number of pins, and gender: DE15S, for the connector on your typical VGA card. Dick -----Original Message----- From: Ethan Dicks <ethan_dicks(a)yahoo.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Wednesday, December 15, 1999 5:58 PM Subject: Re: argh, VAX DB-9 pinout? > > >--- Tony Duell <ard(a)p850ug1.demon.co.uk> wrote: > >> For reference, the stnadard connectors seem to be, with common uses : >> DA26 (Never seen it used) > >Got them on the back of my Cisco AGS+ router - they are carrying V.35 signals. > >-ethan > > >===== >Infinet has been sold. The domain is going away in February. >Please send all replies to > > erd(a)iname.com >__________________________________________________ >Do You Yahoo!? >Thousands of Stores. Millions of Products. All in one place. >Yahoo! Shopping: http://shopping.yahoo.com

26 years, 7 months

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OT: Bill Gates

by wsmith＠gj.com

As amusing twist on a classic joke. When I was in law school many moons ago "Bill Gates" was replaced by "a law student" and the punch line was "Oh, that was our summer associate program." >>> Joe <rigdonj(a)intellistar.net> 12/15 9:31 AM >>> Bill Gates dies and is at the pearly gates talking with Saint Peter. Saint Peter says, "Bill, you've done some wonderful things in your life and have earned the right to choose where you'll spend the rest of eternity. You can choose between Heaven or Hell, but choose wisely." Bill looks over Saint Peter's shoulder between the pearly gates and sees nothing but a lush green meadow. Deciding to heed Saint Peter's words, Bill asks if he could take a look at Hell. Saint Peter agrees and sends Bill to Hell. The Devil greets Bill at the gates of Hell and he is immediately taken aback. Much to his surprise, there's one heck of a party going on. People are dancing, the alcohol is flowing, music is non-stop and everyone is having a blast. Bill returns to Heaven to again discuss his decision with Saint Peter. He again looks over Saint Peter's shoulder and sees only a lush green meadow. Bill says to Saint Peter, "I've put a lot of thought into this decision and it may sound foolish, but I'd like to spend the rest of eternity in Hell." Saint Peter fulfills Bill's request and returns him to Hell. When Bill gets back to Hell there's been a big change. People are writhing in agony, flames are burning, moans of pain and despair are everywhere. Bill, being quite shocked at the sight asks the Devil, "What happened?? I was just down here a little while ago and everyone was having a great time!" The Devil says, "Oh that... That was just the demo!" ! ! !

26 years, 7 months

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An easy one (after that db9 debacle!)

by edick＠idcomm.com

They can be either 220/330 packs, with Vcc at one end and Vss at the other, or they can be 150-ohms to Vcc. If the end opposite the connection to Vcc is not solidly connected to Vss, then it's the latter. Dick -----Original Message----- From: Chuck McManis <cmcmanis(a)mcmanis.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Wednesday, December 15, 1999 4:54 PM Subject: An easy one (after that db9 debacle!) >Ok, so my choice of terms was poor, y'all understood what I meant :-) > >This one should be easy. I've got an ESDI drive, I know that at one time it >had termination resistors in it, I know that I pulled them out, I put them >into my "drawer of misc resistor packs", they are effectively invisible :-) > >What is the resistor values for the term pack? 220/330? > >--Chuck >

26 years, 7 months

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argh, VAX DB-9 pinout?

by ethan_dicks＠yahoo.com

--- Tony Duell <ard(a)p850ug1.demon.co.uk> wrote: > For reference, the stnadard connectors seem to be, with common uses : > DA26 (Never seen it used) Got them on the back of my Cisco AGS+ router - they are carrying V.35 signals. -ethan ===== Infinet has been sold. The domain is going away in February. Please send all replies to erd(a)iname.com __________________________________________________ Do You Yahoo!? Thousands of Stores. Millions of Products. All in one place. Yahoo! Shopping: http://shopping.yahoo.com

26 years, 7 months

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argh, VAX DB-9 pinout?

by edick＠idcomm.com

hey! That's a DE-9. The 'B' shell has room for all of 25 pins. the 'A' shell is that size commonly used for the MAU interface to the backbone tap, also common on MacIntosh monitors. Dick -----Original Message----- From: Chuck McManis <cmcmanis(a)mcmanis.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Wednesday, December 15, 1999 1:25 AM Subject: argh, VAX DB-9 pinout? >I know that someone (Tony?) has already sent this to the list but for the >life of me I cannot find it anywhere. > >What is the pinout of the MicroVAX 9 pin console port and what is the >"correct" jumpering to wire it into a 9 pin serial port on a PC? > >--Chuck > >

26 years, 7 months

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"DB9"

by edick＠idcomm.com

please see embedded comments below. Dick -----Original Message----- From: Fred Cisin (XenoSoft) <cisin(a)xenosoft.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Wednesday, December 15, 1999 2:33 PM Subject: "DB9" >On Wed, 15 Dec 1999, Tony Duell wrote: >> Thank %deity there's somebody else out there who actually knows what a >> 'DB' connector is!. I sometimes think I'm fighting a losing battle >> against the people who insist there's a DB9 :-) > >How large would the pins be, or how far apart if there WERE a DB9? >Or what about a DB25 serial port cable that only has pins 1-8 and 20? >Could we call THAT a DB9? :-) > I once had a Mistubishi monitor which used a 'B'-shell with three coax connectors in it along with eight or nine signals on what looked to be otherwise standard pins. Just yesterday I discarded a badly damaged 'C'-shell with 78 pins in three rows. I don't think that connector will become popular due to its fragility, at least I hope not! > >> >> For reference, the standard connectors seem to be, with common uses : >> >> DA15 (PC joystick), MAU ethernet, etc >> DA26 (Never seen it used) >> >> DB25 (Standard RS232, PC printer port) >> DB44 (Never seen it used) >> >> DC37 (PC external floppy disk, Canon CX-VDO interface) >> DC62 (IBM PC expansion cabinet) >> >> DD50 (Sun SCSI) >> The make these with four rows, more densely spaced, but I don't know the max pin count >> >> DE9 (PC/AT serial port, Atari joystick, etc) >> DE15 (VGA monitor) >> >> I've seen the 19 and 23 pin connectors used by Apple, Atari and Commodore >> Amiga refered to as the DF19 and DG23. It makes sense, but I have no idea >> if that's official. >> >> -tony >

26 years, 7 months

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"DB9"

by truthanl＠oclc.org

Belden Calls them all D-Subminiature connectors either Plugs or Sockets (Jacks) in 9, 15, 25, and 37 pins. Metal Head shells or thermoplastic. Having .050" centered conductors. DSP009 is 9 pin plug DSJ009 is 9 position jack (socket) Were there Standards, or was this left to Mfg part numbering scheme?? Molex, Amphenol, Thomas & Betts, Ansley? Mil Spec? Larry Truthan -----Original Message----- From: Fred Cisin (XenoSoft) [mailto:cisin@xenosoft.com] Sent: Wednesday, December 15, 1999 4:26 PM To: Discussion re-collecting of classic computers Subject: "DB9" On Wed, 15 Dec 1999, Tony Duell wrote: > Thank %deity there's somebody else out there who actually knows what a > 'DB' connector is!. I sometimes think I'm fighting a losing battle > against the people who insist there's a DB9 :-) How large would the pins be, or how far apart if there WERE a DB9? Or what about a DB25 serial port cable that only has pins 1-8 and 20? Could we call THAT a DB9? :-) <snip> >

26 years, 7 months

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"DB9"

by edick＠idcomm.com

regarding the origin of this somewhat odd (in its sensibility) scheme. . . I was told it was Amphenol that cooked up this particular scheme for the benefit of the military procurement system. Presumably it gave them an advantage for a time. Dick -----Original Message----- From: Truthan,Larry <truthanl(a)oclc.org> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Wednesday, December 15, 1999 2:50 PM Subject: RE: "DB9" >Belden Calls them all D-Subminiature connectors either Plugs or Sockets >(Jacks) in 9, 15, 25, and 37 pins. Metal Head shells or thermoplastic. >Having .050" centered conductors. > >DSP009 is 9 pin plug >DSJ009 is 9 position jack (socket) > >Were there Standards, or was this left to Mfg part numbering scheme?? >Molex, Amphenol, Thomas & Betts, Ansley? Mil Spec? > >Larry Truthan > > > >-----Original Message----- >From: Fred Cisin (XenoSoft) [mailto:cisin@xenosoft.com] >Sent: Wednesday, December 15, 1999 4:26 PM >To: Discussion re-collecting of classic computers >Subject: "DB9" > > >On Wed, 15 Dec 1999, Tony Duell wrote: >> Thank %deity there's somebody else out there who actually knows what a >> 'DB' connector is!. I sometimes think I'm fighting a losing battle >> against the people who insist there's a DB9 :-) > >How large would the pins be, or how far apart if there WERE a DB9? >Or what about a DB25 serial port cable that only has pins 1-8 and 20? >Could we call THAT a DB9? :-) ><snip> > >>

26 years, 7 months

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"DB9"

by edick＠idcomm.com

The way I learned it was that the 'D' refers to the shape, the 'B' to the shell size, and the number to the maximal pin count. The spacing is not .050" however. It seems to me that it's larger than 0.10" andnot less, except in the high-density versions like the DE15. Dick -----Original Message----- From: Truthan,Larry <truthanl(a)oclc.org> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Wednesday, December 15, 1999 2:50 PM Subject: RE: "DB9" >Belden Calls them all D-Subminiature connectors either Plugs or Sockets >(Jacks) in 9, 15, 25, and 37 pins. Metal Head shells or thermoplastic. >Having .050" centered conductors. > >DSP009 is 9 pin plug >DSJ009 is 9 position jack (socket) > >Were there Standards, or was this left to Mfg part numbering scheme?? >Molex, Amphenol, Thomas & Betts, Ansley? Mil Spec? > >Larry Truthan > > > >-----Original Message----- >From: Fred Cisin (XenoSoft) [mailto:cisin@xenosoft.com] >Sent: Wednesday, December 15, 1999 4:26 PM >To: Discussion re-collecting of classic computers >Subject: "DB9" > > >On Wed, 15 Dec 1999, Tony Duell wrote: >> Thank %deity there's somebody else out there who actually knows what a >> 'DB' connector is!. I sometimes think I'm fighting a losing battle >> against the people who insist there's a DB9 :-) > >How large would the pins be, or how far apart if there WERE a DB9? >Or what about a DB25 serial port cable that only has pins 1-8 and 20? >Could we call THAT a DB9? :-) ><snip> > >>

26 years, 7 months

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DTC 520A - SASI or SCSI?

by Innfogra＠aol.com

I have pulled quite a few of these out of machines. I believe they are SASI and control two MFM hard drives and a floppy set. The largest hard drive I have seen hooked up is the Quantum 540. Normally the floppies were DSDD 360s but I believe it would work with single density and single sided. I have no documentation. Paxton

26 years, 7 months

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Tough one!!!

by mrbelles＠pittstate.edu

Alright, 1. Thanks for reading this junk posting, for that I apologize. 2. How do I unsubscribe from this list? - which address? 3. command word? -> unsubscribe classiccmp - ??? I have tried several times to unsubscribe. This list is simply swamping my mail server. Can't handle all of the messages. It's been fun reading all this stuff, you all certainly know a lot of S!@#. Just tell me how to get off the mailing list. Flame all you want...I just want off this list! Addresses tried -> listproc(a)listproc.listproc.net classiccmp(a)u.washington.edu Peace...

26 years, 7 months

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DTC 520A - SASI or SCSI?

by ethan_dicks＠yahoo.com

Going through a box of disk interface cards, I ran across a couple of these DTC 520As. Cursory examination shows a 50-pin connector (J4) with two termination resistors (220/330), two 20-pin connectors (J2, J3) which are presumably analog data for two ST506 drives and two 34-pin connectors (J1 and J9). I would expect that J1 is the control cable that goes with J2 and J3. I suspect that J9 is for floppies. The major chips are two 8255s, one 8085, one DTC-037, one NEC D765, one FDC-043, one DTC MSA 2827G, an AMD P8353, and an AMD AM9517. There are several chips with the numbers covered by type- written numbers, PALs and ROMs, no doubt. There are 8 LEDs in a row by the power connector and an 8-position DIP switch.

26 years, 7 months

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DTC 520A - SASI or SCSI?

by edick＠idcomm.com

Based on the names of most of the signals, I'd say the 50-pin host interface connector is for an early version of SASI or SCSI but done tenuously enough that there was margin for going with a standard when one evolved. The manual in my possession is dated January 16. 1980. They didn't have a standard then, and, in fact SCSI was still pretty much of an illusion at the time. I'd guess it's a safe bet that this one will work with SASI hardware or even with some SCSI hardware. I doubt that it will work with most state-machine-driven interface devices, since some of the signals are not present, and, frankly, this interface is far enough off the mark that it probably needs a programmed I/O sequence to handle it. Dick -----Original Message----- From: allisonp(a)world.std.com <allisonp(a)world.std.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Wednesday, December 15, 1999 7:01 AM Subject: Re: DTC 520A - SASI or SCSI? > >Ok, > >Likely that is something else. I'd expect the 34pin to be floppy and >maybe MFM hard disk. > >The 50pin could be... QIC02, QIC24 or maybe the old Hard disk interface >used for the 8" hard disks (SMD?) like the SA4000. > >!983 SCSI ws likely SASI, but many tapes and disks used a 50pin parallel >like interface back then too. > >Allison > > >On Tue, 14 Dec 1999, Ethan Dicks wrote: > >> >> Going through a box of disk interface cards, I ran across a couple of these >> DTC 520As. Cursory examination shows a 50-pin connector (J4) with two >> termination resistors (220/330), two 20-pin connectors (J2, J3) which are >> presumably analog data for two ST506 drives and two 34-pin connectors (J1 >> and J9). I would expect that J1 is the control cable that goes with J2 and >> J3. I suspect that J9 is for floppies. The major chips are two 8255s, one >> 8085, one DTC-037, one NEC D765, one FDC-043, one DTC MSA 2827G, an AMD P8353, >> and an AMD AM9517. There are several chips with the numbers covered by type- >> written numbers, PALs and ROMs, no doubt. >> >> There are 8 LEDs in a row by the power connector and an 8-position DIP switch. >> >> >From the date codes, it appears to have been made near the end of 1983. >> >> Can anyone shed any additional light on this device? Knowing what this was >> expecting to hook up to and how to set the DIP switches would be a great help. >> >> Many thanks, >> >> -ethan >> >> >> >> ===== >> Infinet has been sold. The domain is going away in February. >> Please send all replies to >> >> erd(a)iname.com >> __________________________________________________ >> Do You Yahoo!? >> Thousands of Stores. Millions of Products. All in one place. >> Yahoo! Shopping: http://shopping.yahoo.com >> >

26 years, 7 months

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20mA cabling questions

by ethan_dicks＠yahoo.com

The PDP-8/L restoration continues. I have two devices to attach to my -8/L for testing - a VT220 (all have 20mA current-loop connectors) and an ASR-33. One problem: the connector on the VT220 is female and the cable coming from the ASR-33 is male. While this might not seem like a problem, it becomes one when I have to use either device from the same W076 card. Many years ago, I rigged up a working *male* cable from a W076 card for use with this VT220. It still works. I have a quick-n-dirty Switch Register->TTY test program and can emit all sorts of ASCII characters for testing. When I stick a different W076 card in the -8/L, one with a female connector, within the limitations of this particular ASR-33, all is well (the type cylinder doesn't always retract all the way, nor does the hammer always return to the proper position, but I currently suspect that the replacement rubber pad I have attached to the lever arm/hammer does not have the correct resiliency). So... my first goal is to come up with some cables that will solve my W076 problem. Is there a good 20mA primer out there? I have a basic understanding that it's all based on 12VDC loops, send and receive take four wires, but there are six coming out of the W076 card... the extra two are reader-run relay signals, obviously not needed for a VT220, but very important for the ASR-33. A) Is there a color standard for the 20mA connector cabling? I have three W076 cards with three different arrangements. B) When I make a pin-one-to-pin-one male-to-male 20mA cable, it does *not* work with the female-equipped W076 and the VT220. A few moments with a DVM show that the arrangement of a W076 and my straight-through cable do not match the pinout of my long-ago-homemade W076-to-male connector that does work with the VT220. Is there a special wiring trick for male-to-male 20mA cables? C) Somewhere, I have a small box of 20mA cables that have, IIRC, four conductors. Presumably, these are for VT52s. I have no reason to expect that they won't work with the VT220, once I find them. I take it, then, that in the "old days", one never used an ASR-33 as a tape input device except on the console interface? I'm thinking of some of the ancient distribution panels for other DEC serial cards that had EIA (RS-232) _or_ current-loop connectors. Am I missing something? Right now, because my TTY print mechanism is acting up (must press down on the type cylinder between chars, and the line-feed mechanism sticks 20% of the time) I have been testing by inserting one W076 in the backplane for paper tape reads and the other W076 in the backplane for interactive testing. Obviously, this can't go on forever. I suppose I could rig up a *really* bizarre cable that sends the output to the VT220 and takes input from the TTY. Maybe I'll just work that angle. It would save on paper. I don't have much cause to punch stuff right now, and until I get the primary box working I won't even attempt to attach my outboard 8Kw to this CPU (the eventual goal of all of this is to set up for 8K-papertape-BASIC and play Star Trek. I have all the tapes to do this, but I do have to replace the floating-point tape that tore the last time I loaded it (a long, sliver of a tear, not a perpendicular, parting tear). I still know next to nothing about the pr/s01 except that it is *not* 110 baud. Another one of my ancient projects is to replace the M452 variable clock module with a home-made digital baudrate generator. I suppose I'd have to wire a switch on the backplane as well to select the M706/M707 from two stop bits to one when the baud rate was 150 or higher, but I have a prototype module and I have the COM 8116 clock chip and I have the proper crystal to drive it. What remains (besides sitting down and finally *making* it) is to decide if I want to build in the ability to drive transmit and receive at different rates as was common with VT52s. I could receive at 150 or 300 baud and transmit as fast as possible, perhaps 9600 (I'd have to look into the M706/M707 designs to even hazard a guess, but even 150/2400 is an improvement). The goal would be to be able to use the pr/s01 with a TTL -8. -ethan ===== Infinet has been sold. The domain is going away in February. Please send all replies to erd(a)iname.com __________________________________________________ Do You Yahoo!? Thousands of Stores. Millions of Products. All in one place. Yahoo! Shopping: http://shopping.yahoo.com

26 years, 7 months

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IBM 4216-020 printers?

by jott＠saturn.ee.nd.edu

Hello - I have 2 LaserPrinter Font Cards (p/n 1255806) you may have for shipping if they'll work. Typeface Pitch Point FGID Orator Bold 6.5 18 435 Orator Bold 8.1 16 434 Orator 10 14 005 john In-Reply-To: <19991214201001.B25956(a)mrbill.net>; from mrbill(a)mrbill.net on Tue, Dec 14, 1999 at 08:10:01PM -0600 On Tue, Dec 14, 1999 at 08:10:01PM -0600, Bill Bradford wrote: > Anybody know anything about these? I just picked up six of them for > $25 , with two fuser units and no toner carts, and a "4216 Personal > Pageprinter Technical Reference". Five of the printers have a strange > 15-pin D-sub connector that resembles an AUI or PC joystick port, with > a set of DIP switches beside it. The sixth has normal serial/parallel > interface connectors. None of these printers have ever been used; some > are still in the original plastic "bag" wrappings. They date from around > 1988. > > My question is - whats the strange 15-pin interface, and do I have any > chance of hooking it to a PC or similar machine ? I got these so cheap > because the guy who had them was going to toss them, and I hate to see > stuff get tossed. Hopefully they'll turn into something useful. > > Thanks. > > Bill > > -- > Bill Bradford * mrbill(a)mrbill.net / http://www.mrbill.net > mrbill(a)sunhelp.org / http://www.sunhelp.org > --------------------------------------------------------------------- > "Fear leads to anger. Anger leads to hate. Hate leads to using > Windows NT for mission-critical applications." > -- What Yoda *meant* to say -- *********************************************************************** * John Ott * Email: jott(a)saturn.ee.nd.edu * * Dept. Electrical Engineering * * * 275 Fitzpatrick Hall * * * University of Notre Dame * Phone: (219) 631-7752 * * Notre Dame, IN 46556 USA * * ***********************************************************************

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