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

by useddec＠gmail.com

*I found a handful or two of 54-20410-01 and a bunch of 54-20352-01, but have conflicting info on what systems they are from. Does anyone have any info on them or need any?* *I'm also looking for a list of DEC simms. A fellow list member was kind enough to send me the following link.* *http://www.chrisjdoran.plus.com/simms.html <http://www.chrisjdoran.plus.com/simms.html>* *Any info would be useful.* *Thanks, Paul*

7 years, 6 months

1
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Oliverti Te300 teleprinter manuals?

by mattislind＠gmail.com

Does anyone have any type of manuals for the Olivetti Te300 teleprinters? Preferebly maintenance manuals or similar. https://vads.ac.uk/diad/bres/pub/COID/231/32.jpg

7 years, 6 months

1
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ISO: Scan of IASIS ia-7301 ("Computer In A Book") manual / text

by derschjo＠gmail.com

Hi all -- I picked up a nice IASIS ia-7301 (see: http://www.old-computers.com/museum/computer.asp?c=544&) recently. It came with the binder and the computer but none of the paper bits. Does anyone have the manual scanned (or is there anyone who might have a copy to scan)? I'd like to print a copy to put in there. My searches on the 'net have come up empty. Thanks as always, Josh

7 years, 6 months

2
1
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More DEC CPUs/motherboards/mem

by useddec＠gmail.com

Trying to clear off more shelves. I have one of each of the following. I hope the descriptions are right. B2021-FA AlphaServer 2100 128MB B3005-AA 4100 54-19463-01 3100 KN01 54-22703 443 motherboard 54-23600 Prioris HX ME Please contact me offline if you have any questions or interest. I have a lot of 3100, 5000, and 3000 boxes and more parts to go through yet. Thanks, Paul

7 years, 6 months

1
0
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ssh to tweenex.org

by stephane.tsacas＠gmail.com

Hi, Did anyone manage to connect to tweenex,org through ssh now that telnet port is closed ? I received an mail that says : TELNET access to twenex.org has been changed to only support SSH via the SSH passthru user twenex at sdf.org. without saying which password should be used ... Thanks -- ??phane tsacas

7 years, 6 months

4
4
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Historic IBM memory tech

by donald＠donaldwhittemore.com

I assume you have a standard search set up on eBay? That is where I got mine.

7 years, 6 months

2
1
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German Translation, Serial Port?

by w2hx＠w2hx.com

Hello friends. I need a translation from a German manual describing serial port parameters. I used google translate but it doesn't quite give me the warm and fuzzy. Anyone here speak German? Here is what it says: Betriebsart: Asynchron 16 Zeichenl?nge: 7 bit (mit Sperrschritt) Parity: gerade L?nge Sperrschritt: 1 bit Google says: Operating mode: Asynchronous 16 Character length: 7 bit (with blocking step) Parity: straight Length of blocking step: 1 bit First, anyone have any idea what Asynchronous 16 means? (async I get, but "16"?) 7 bit with blocking step. Could this mean 7 bit with stop bit? Parity: straight. Could this mean odd or even? Length of blocking step. Could this be number of stop bits? I am attempting to translate some pages in this manual and would like to get this right (for others who may find this info useful). Thank you!!! (or should I say Danke?!) 73 Eugene W2HX PS. This is for an HF antenna coupler that can be controlled over a serial port.

7 years, 6 months

5
8
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Looking for Unisoft Unix for Colex systems

by jos.dreesen＠greenmail.ch

Unlikely, I know, but i am looking for Unisoft UNIX fo a COLEX system I have a Colex 850 CP/M system, with a lose STD-68000 card and some more memory cards. This should support the Unisoft UNIX that once was available for this system. Anyone has a copy of this Unisoft version ? Jos

7 years, 6 months

3
4
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Clock batteries...

by w9gb＠icloud.com

Not exactly. The TL-5242 is more than 3 times the price and chemistry difference. I assume you do not desire to replace the Lithium Coin Cell ? or can?t find? Tadrian TL-5242-W Lithium battery https://www.mouser.com/ProductDetail/Tadiran-Batteries/TL5242W?qs=Yk42LiOZU… Data sheet https://www.mouser.com/ds/2/474/TL-5242-W-1214138.pdf BR2335 Lithium Coin Cell w/solder terminals (BR2335-T3L) After Panasonic purchased Sanyo, a decade ago, they control about 70% of the global lithium coin cell market. https://industrial.panasonic.com/ww/products/batteries/primary-batteries/li… Panasonic refers to your solder terminal profile as ?Type G?, 3-pin mount. They have designated a suffix for each style, in this case GUFN or GUN. == Panasonic BR 2330 ?Type G?. Suffix: GUFN (yellow insulator) and GUN (no insulator) Size and mounting identical. 255 mAh rating. The GUFN at Mouser for $2.05 each (not currently in stock) https://www.mouser.com/ProductDetail/Panasonic-Battery/BR-2330-GUFN?qs=rqxQ… Panasonic Data Sheet https://industrial.panasonic.com/cdbs/www-data/pdf2/AAA4000/AAA4000D95.pdf Ray-O-Vac BR 2335-T3L Lithium Coin Cell, 300 mAh Data sheet http://farnell.com//datasheets/1728610.pdf?_ga=2.53046696.1289741559.153343… Where to BUY ? Solder Tab lithium batteries are used in MILLIONS of Mobile devices (Toll Road transponders, various auto/truck dongles, etc.). Electronics Distributors: Digi-Key, Mouser, Future, Allied, and Newark/Farnell stock these lithium coin cells. In addition, Batteries Plus retail stores (across North America) have Solder Tab Welders ?on premise? and can create the coin cell you desire (Just In Time needs). This consumer convenience is higher in cost. Lithium Coin cells are PROHIBITED from domestic Air Shipment (USPS Priority Mail) ? SO shipping costs can be higher and require longer time. I order my needs 2 or 3 times each year, of the most popular profiles. Panasonic Lithium Battery Catalog (circa 2015) https://industrial.panasonic.com/ww/system/files/data/download/catalog/id_l… greg == Does anybody know if external 3.6 VDC batteries, like the TL5242, are the counterpart for on board 3.0 VDC batteries, like the BR2335-T3L?

7 years, 6 months

2
1
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Fairly Extensive Singer/Friden "System Ten" Computer System for Rescue

by tshoppa＠wmata.com

I had been told for decades that there was a flight simulator that used a Singer System Ten and that United Airlines operated it outside Chicago for some unreasonably long time. This was "Urban Legend you wouldn't believe it but that's what the bosses wanted" stuff back in the 1990's. Using a business computer (especially one that looked like an overgrown Frieden calculators from the 1960's) to run a flight simulator always seemed odd to me, to the point of making the story not quite believable. Other Singer-Link flight simulators that I knew of, used GP4's or Sigma-5's and then the Sigma-5 clones. Tim N3QE

7 years, 6 months

1
0
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Pdp 11/34 System for sale in Riverside,ca

by wayne.sudol＠hotmail.com

http://www.ctonlineauctions.com/detail.asp?id=746466 >From the pictures it looks to be a fairly complete system with Kennedy tape drive. Has a System industries controller but doesn't appear to have a disk drive. I'd love to have it, but my wife would kill me if i brought something that big home. I hope someone in the Riverside area on this list ( Mark Blair ? ) can acquire it. I have no affiliation with the seller. Wayne

7 years, 6 months

6
8
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Historic IBM memory tech

by peter＠vanpeborgh.eu

Vintage techie guys and girls, Do any of you know where I could get hold of IBM 3850 Mass storage and IBM 2321 Data cell media? 1960s-1970s. See: https://en.wikipedia.org/wiki/IBM_3850 https://en.wikipedia.org/wiki/IBM_2321_Data_Cell If you do, I would like to get hold of one of each. Many thanks, Peter || | | | | | | | | Peter Van Peborgh 62 St Mary's Rise Writhlington Radstock Somerset BA3 3PD UK 01761 439 234 || | | | | | | | |

7 years, 6 months

2
1
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ISO: Blue (usually) Silicone? tape retainer material

by cclist＠sydex.com

Another open-reel tape query for the experts. I recall that new tapes would often come with a strip of (usually blue) silicone-ish tape to retain the end of the tape. I've got a couple of strips here and I'll swear that I've seen the stuff in other applications, but memory fails me. It's not sticky in itself, but sticks quite nicely to mylar tape. Easily removed and indefinitely reusable. I think I've seen it in kids' toys of the era, where various patterned pieces were cut from the stuff and assembled on something akin to a whiteboard. Does this ring any bells with anyone? Do you know what the stuff is and where I can get some? Thanks for any help, Chuck

7 years, 6 months

4
5
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Computer tape quantities in the 70's or 80's?

by tshoppa＠wmata.com

Chuck writes: > I'd probably start with the US Commerce Department. In their industrial > report summaries, the product code is "36950 11" > e.g.: https://tinyurl.com/y8ks3mdd for 1987-88 Wow, Chuck, that is fascinating info that I had no idea was so easily accessed. Thank you! It looks like the tape production in the 80's was 30M to 40M reels per year so my guess at 100M was high but not too far off. I super like some of the product codes just on those pages. E.g. 35711 22 is Analog Computers, and 35751 75 is Teleprinters under 20 characters per second (e.g. Model 33's which saw a steep decline through the 1980's. I'm guessing they would've peaked in the early 70's.). Tim N3QE

7 years, 6 months

2
1
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PC04 cables

by jnc＠mercury.lcs.mit.edu

> can I appeal to anyone who has, or can point me at, documentation for > the connection of the PC04 to _other_ PDP-8 models please lend a hand - > _especially_ if you have paper documentation which is not available > online? The other thing I'm looking for is anything about the earlier version of the reader, the one that used the stepper motor to strobe the data, instead of the feed holes. I've seen references to this in the DEC documentation, but other than that, I have nothing on it. Noel

7 years, 6 months

2
1
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Wanted: Exidy Sorcerer CP/M cart or disk

by tosteve＠yahoo.com

Hi, I need CP/M, either floppy or cart based, for my Exidy Sorcerer. I want to format and use the floppy drives - I have the S-100 expansion and interface card. I?ll make copies and return your disk if you have one. Thanks- Steve.

7 years, 6 months

2
1
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Pair of Portmaster II's

by db＠db.net

I have two Livingston PM-11's (http://portmasters.com/faq.html) and I haven't needed either of these in a long time. Is anyone interested in them? Diane -- - db at FreeBSD.org db at db.net http://www.db.net/~db

7 years, 6 months

4
5
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RQDX3 formatter

by cc＠informatik.uni-stuttgart.de

Where do you patch the ZRQCH0 binary to use different geometries for non-DEC drives with a RQDX3? As it seems it should be possible, but noone has told how to do this ;-) Christian

7 years, 6 months

5
6
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Australian Computer Museum in trouble.

by geremin＠iprimus.com.au

Australian COMPUTER MUSEUM -- Dispersal Days -- Villawood NSW. We have been told that BULLDOZERS will demolish our Villawood storage space in 2 weeks. We have yet to find a suitable/affordable alternate space so ... "OPEN DOOR DAYS" The old fruit shop at 888 Woodville Road, VILLAWWOOD, will be open for anyone who cares to come and take anything away and help preserve our computing heritage. Hours: Sat 28th/Sun29th 9am to 9pm, then Monday-Friday 10am to 10pm, repeat the next week. Off-street parking, easiest access is from south (Hume Hwy), see Google Maps. Bring your Car, Van or Ute and enough muscle to help empty our shed. Please tell your friends and/or work colleagues. -- <b>John GEREMIN, Honorary Treasurer, 0427 10 20 60.</b> Australian Computer Museum Society Inc. PO Box 4005, Homebush, NSW, 2140. --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

7 years, 6 months

7
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Wanted: Exidy Sorcerer CP/M

by steve＠oldcomputers.net

Hi, I need CP/M, either floppy or cart based, for my Exidy Sorcerer. I want to format and use the floppy drives - I have the S-100 expansion and interface card. I?ll make a copy and return your disk if you have one. Thanks- Steve.

7 years, 6 months

1
0
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Narrow width fan fold paper

by db＠db.net

I found over a full box of fan fold paper for an MX-80 that was hiding all these years. It's here in Ottawa Canada so if you want it and can arrange pick up it's yours. Otherwise it's scrap paper. This isn't worth the shipping! Diane -- - db at FreeBSD.org db at db.net http://www.db.net/~db

7 years, 6 months

1
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Computer tape quantities in the 70's or 80's?

by tshoppa＠wmata.com

Bitsavers has preserved a couple of key marketing studies that help me understand the wide world of disk storage in the 70's and 80's. For example http://www.bitsavers.org/pdf/dec/competitiveAnalysis/Engineering_Strategy_R… has numbers both for DEC and world disk market. DEC sales were a substantial chunk of the world market of disk sales and the document seems to understand the up and coming world of small disks while also having good numbers on the mainframe disk world. I wonder if we have any documentation (probably internal numbers but maybe also including guessing at competition) of, say, reels of half inch magtape sales sold in the past. Chances are this would be a 3M or competitor's document since the bulk of magtape media sales were not normally done through DEC or IBM etc. For example I might guess that by the 1980's there were 5 reels of 2400foot half inch magtape for every person in America and tapes were reused up to 10 years. That would imply that 100 million reels of tape were sold a year. But that's just a guess and maybe I'm off by an order of magnitude one way or the other. So if you know of any documents to help me get a comprehension of the scale of computer tape manufacturing in the 1970's and 1980's, please let me know! It might be a 3M press release bragging about opening a new plant and what it's capable of, for example. Tim N3QE

7 years, 6 months

2
1
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PC04 cables

by jnc＠mercury.lcs.mit.edu

> From: Al Kossow > is it roytron/Roytron500_1966.pdf ? That sure looks like it! The illustration on pg 5-16 of the DEC PC054/PC05 manual looks just like the thing illustated on the cover of that. I wonder why it didn't turn up in the Web searches? Probably because this doesn't include the term 'maintenance manual'? I'll add the link to the article. Thanks! Noel

7 years, 6 months

1
0
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PC04 cables

by jnc＠mercury.lcs.mit.edu

So, for needs of my own I've been studying up on the PC04 and PC05, and also the differences between them (which cables they use, etc, etc). I decided I should write up what I've learned, since there's no simple source for all this stuff; the remaining documentation is kind of spotty (lots of things are no longer extant, or at least not available online), and I've gathered data from far and wide. So I have most of it now written up, available here: http://gunkies.org/wiki/PC04/PC05_Paper-Tape_Reader/Punch (and feedback, comments, corrections, etc would be most gratefully received), but one area which I wasn't able to cover as definitively as I'd have liked is the PDP-8 connectivity (cabling, etc). I was able to glean a few details from the PC04'05 Manual (DEC-00-PC0A-D), but the details of the cables, etc for all PDP-8 models _other_ than the PDP-8/E I couldn't locate. So, can I appeal to anyone who has, or can point me at, documentation for the connection of the PC04 to _other_ PDP-8 models please lend a hand - _especially_ if you have paper documentation which is not available online? And speaking of online documentation, it turns out (to my initial surprise, but it makes sense) is that the M7810.is _not_ the first PC11! There was an earlier one, the M781 card, which (like the KL11->DL11) is program compatible, but is a dual card which one uses with an M105 and an M7821. So I have access to a set of prints for that, and will scan them and make them available at some point - but if anyone has any use for it, please let me know, and I will accelerate that. If uses BC08F cables, the details of which _aren't_ included in the drawing set (grrr!), so again, if anyone has that info, I'd appreciate a copy. Finally, speaking of missing stuff, several DEC manuals refer to the "Roytron Model 500 Maintenance Manual" (alternative title "Royal-McBee Model 500 Maintenance Manual"), which again I couldn't find. Does anyone have a copy of this? Thanks! Noel

7 years, 6 months

2
3
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Boards for XTs and ATs

by useddec＠gmail.com

XT boards IBM 1501994 Async card 83X9262 or 3 qty 3) 110-6135952-01 serial/ parallel 6236194 JB125540 has DB25 Sysgen PSA 1030 30-02131 Seagate 20917 Everex EV138 memory 30150986? B/W Parallel WDXT-GEN 61-000222-08 AT boards qty 2) Interlan NT 600A-3 DET 55X3543 AST 20297 AST Premion 386 Cache mem ME/2MB 181-7043-3E 85-3408-01 181-7044-3E 85-3331-01? AT&T TARGA-1.0 Verticom GPG assy? 3 board set DC4030VL-1 IDE/floppy/mem WD1988 1006V? drive cont TMC-1680Future Domain a flop/ SCSI EV346 drive cont 3COM ETHERLINKS III 3COM ETHERLINKS 16 If you have any questions or interest, please contact me off list. I would prefer to sell by the lot. Sorry for any typos, Thanks, Paul

7 years, 6 months

1
0
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ISO: Tape Seal Belts

by Frisbie＠Flying-Disk.com

Chuck Guzis <cclist at sydex.com> wrote: > I'm looking for a small quantity of 10.5" half-inch reel tape seal > belts. These are the things that almost everybody with a large > collection of tapes used to hang their half-inch tapes in racks made for > the purpose. > I can't seem to find anyone who is sitting on a pile of these. You just found someone. What color(s) would you like? The only catch is that I am moving from Los Angeles to Oregon, and they are on a moving van. Seriously. They just finished loading, and the truck is still sitting in front of my house while the crew cleans up. They also loaded three tape racks and about 500 tapes. I won't be following them to Oregon until September, and it may be a few weeks before I can find and unpack one of the boxes (over 800). E-Mail me after Labor Day and I'll see what I can dig out for you. Be warned that I may not have my email server up and running right away. Long-distance moves can be "interesting" (and expensive) for someone who is: A vintage computer enthusiast, an home shop machinist, and a book fanatic, with a wife who shares my book "problem". :-) Examples include: A Century Data T302-RM disk drive, multiple DEC H960 racks with TU56 DECtape drive, 9-track tape drives, etc., a Bridgeport CNC milling machine, two lathes, and lots more shop equipment. They ran out of axle weight capacity before they ran out of space in the semi-trailer. Alan "Packrat" Frisbie

7 years, 6 months

3
2
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IBM PS2 boards, IBM, Novell

by useddec＠gmail.com

I'm still sorting and found a few IBM83X9648 boards and 8 or so Novell 816-312 also numbered 738-154-001. AT and XT boards next. If you are interested or have questions, please contact me off list. Thanks, Paul

7 years, 6 months

1
0
0 0

Clock batteries...

by cctalk＠gtaylor.tnetconsulting.net

Does anybody know if external 3.6 VDC batteries, like the TL5242, are the counterpart for on board 3.0 VDC batteries, like the BR2335-T3L? -- Grant. . . . unix || die

7 years, 7 months

1
0
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Books up for grabs

by db＠db.net

I will send these out free for cost of shipping. These two really should go to people who *own* the machines covered. VAX11/780 Hardware Handbook 1978(!) PDP11/45 processor handbook 1971(!) IBM DOS Technical Reference (the 3 ring binder + box) Greenleaf Software Comm Library (3 ring binder + box) I don't think any of these will be a problem mailing to U.S. P.S. I am still waiting on confirmations for the two Livingston PM-11's Diane -- - db at FreeBSD.org db at db.net http://www.db.net/~db

7 years, 7 months

2
1
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Service manual for Archive 4584NP DDS1?

by cclist＠sydex.com

Going through my stuff here, I've found an Archive 4584 DDS1 autoloader. I believe this drive was used on earlier Sun systems. The feed rollers have turned to goo, unfortunately. I've cleaned them off and can probably refurb them, but I need a service manual to figure out how to disassemble the unit--it looks like a bit of a nightmare. Alternatively, if someone wants to take a crack at the thing, you can have it for shipping. Heaven knows, I've got my fill of DDS drives. --Chuck

7 years, 7 months

1
0
0 0

DECstation firmware archive?

by aek＠bitsavers.org

Are the firmware eproms for the DECstation archived anywhere?

7 years, 7 months

8
10
0 0

PT210 rs232 interface module

by dave＠661.org

I've had a fondness for the Radio Shack TRS-80 PT-210 portable printing terminal for a long time. Unfortunately, I've been unable to find an RS-232 interface module for it. A couple years ago I found a hardcopy of the service manual and used it to enter schematics and lay out a board for it. I scanned it and that's the one that's circulating on the web. The schematics and foil patterns in the service manual seem to be slightly wrong, so I've been on the lookout for one on eBay. I found one and won it just now and will use it to verify my design. I should have blank boards ready for sale in a month or two. If the other bidder is here, please email me with a screenshot showing that you bid. I'll send you a blank board free of charge when I get boards made. -- David Griffith dave at 661.org A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?

7 years, 7 months

1
0
0 0

DECstation firmware archive?

by shadoooo＠gmail.com

Hello, maybe you have also a dump for a 4000-100A ? I have a motherboard which seems to have problems to Bcache or Pcache, and another one which I took as replacement, which has a very old version. I wonder if there's a way to dump the firmware in some way from the non-working one, then update the other... Of course I would avoid to desolder and resolder the flash Roms... Andrea

7 years, 7 months

2
1
0 0

ISO: Tape Seal Belts

by cclist＠sydex.com

I'm looking for a small quantity of 10.5" half-inch reel tape seal belts. These are the things that almost everybody with a large collection of tapes used to hang their half-inch tapes in racks made for the purpose. At one time, like tape write rings, these things were as common as cockroaches. Countless millions manufactured. I can't seem to find anyone who is sitting on a pile of these. Not even eBay. Mind you, I don't want the tapes themselves, just the belts. My issue is that I'm getting sent tapes without cases or belts more frequently. I suspect that in many situations, the belts have just been discarded, as they break and become brittle with age. I can remember discarding the hard plastic cases when refitting tapes for the auto-thread drives. We'd fill up dumpsters with the things. If someone is sitting a pile of the old cases, those would do in a pinch. Any ideas or leads welcome. Thanks, Chuck

7 years, 7 months

1
0
0 0

Sellam's VWoCW VCF XIII 10% Off Show Special!

by sellam.ismail＠gmail.com

Hello Folks! I have nothing to list for this week because I'm preparing for the big show, the VCF West XIII this coming weekend in Mountain View, California. I'll be bringing a lot of items, some already listed in my VWoCW and some new unlisted items. Examples of unlisted items I plan to bring along: MSI/88e 8088-based portable handheld computer with barcode scanning wand - $150 Integrated Computer Systems Portable Microprocessor Training Lab - $250 Zenith ZFL-184 SuperSport laptop with original Zenith soft shell carrying case - $70 Heathkit H88 - $275 Heathkit H89 - $250 Heathkit H19 - $150 Otrona Attache - $475 Zilog Z-80 Development System with external Zilog dual 8" drive subsystem - $2,000 I also have a series of Commodore PETs, as follows: 2001-8N 2001-16N 2001-32M 4016-12 4016-N 4032-12 4032-N 8032 8032-32B Note: I am only bringing along pre-sold PETs due to space constraints. If you're interested in any of the above items, or any item in my VWOCW, I'll give you a 10% off VCF special if you are prepared to pick up at the VCF. Remember, these are asking prices, I am open to reasonable offers! Please contact me *ASAP* if you're interested in taking advantage of the 10% off VCF special. Any items I bring that aren't pre-sold will go up for sale to the public at the VCF on Saturday morning. You can shop for more items here (as above, 10% off applies if you pre-arrange a sale): https://docs.google.com/spreadsheets/d/1I53wxarLHlNmlPVf_HJ5oMKuab4zrApI_hi… Thanks! Sellam

7 years, 7 months

1
0
0 0

CBM 2040/3040/4040/2031/2031LP loan needed

by brain＠jbrain.com

I am wondering if anyone relatively near Southeast Iowa might have a working 170kB 5.25" IEEE drive I can borrow for a few weeks. I know it's a long shot, and you'd think I'd have one sitting here, but all my boat anchor PET drives in my stack are 8050 units. I am hoping to add some functionality to ZoomFloppy to support these drives. I've tried approximating the 4040 with an MSD drive using the IEEE connection, with no success. While I am happy to buy a unit for a reasonable price, and I'll check online for items for sale, that would most likely involve shipping, and the PET drives are ill-suited to ship (financially, and for the health of the unit) It's not a show stopper, as VCF-MW is coming up soon, and I no doubt can borrow a unit from someone then or maybe even fix the code that weekend with a loaner unit.? Still, if I can create some success before hand, so much the better. Jim -- Jim Brain brain at jbrain.com www.jbrain.com

7 years, 7 months

1
0
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Apologies

by sales＠elecplus.com

When I posted the Sun keyboards, I did not realize that 1) The checkout would not work correctly for TX residents, and 2) The search box was not working. My apologies for all those who tried to buy a keyboard, and could not. Please try again? Cindy Croxton Electronics Plus 1613 Water Street Kerrville, TX 78028 830-370-3239 cell sales at elecplus.com --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

7 years, 7 months

1
0
0 0

Australian Computer Museum - HELP

by geremin＠iprimus.com.au

The building housing the Australian Computer Museum is scheduled to be demolished in 2 weeks. Anyone in Sydney (or nearby) is invited to HELP preserve the collection by providing storage (for doco or big or small items) until we get a proper home. Please email INFO at ACMS.ORG.AU for more details, or call John 0427 10 20 60 in Australia. -- <b>John GEREMIN, Honorary Treasurer, 0427 10 20 60.</b> Australian Computer Museum Society Inc. PO Box 4005, Homebush, NSW, 2140. --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

7 years, 7 months

3
2
0 0

CNC paper tape reader pinouts

by aek＠bitsavers.org

I was trying to find FANUC and Ricom PTR-230 pinouts today and stumbled on these https://www.mefi.cz/files/dokumentace/trans/simulacectecek/ FWIW, here are the pinouts for Sanyo-Denki 1402 https://www.mefi.cz/files/dokumentace/trans/snimanictecek/ktr48.pdf mentioned in http://www.classiccmp.org/pipermail/cctech/2015-May/005731.html

7 years, 7 months

1
0
0 0

Unknown Z80 CPU board and backplane ID anyone?

by binarydinosaurs＠gmail.com

Hi folks, A friend of mine in the UK is looking for any info on the following boards. The CPU board is marked ?VA 03-907023-00? and features a Z80 with 16K RAM and an 18.432MHz crystal. The backplane is also VA and has 11 132-pin slots that aren?t all identical implying usage for different cards in those locations. Voltages are +5/-5/+12V. Pics: http://www.binarydinosaurs.co.uk/tynemouthsw_2018-Jul-30.jpg <http://www.binarydinosaurs.co.uk/tynemouthsw_2018-Jul-30.jpg> http://www.binarydinosaurs.co.uk/tynemouthsw_2018-Jul-30-1.jpg <http://www.binarydinosaurs.co.uk/tynemouthsw_2018-Jul-30-1.jpg> http://www.binarydinosaurs.co.uk/tynemouthsw_2018-Jul-30-2.jpg <http://www.binarydinosaurs.co.uk/tynemouthsw_2018-Jul-30-2.jpg> http://www.binarydinosaurs.co.uk/tynemouthsw_2018-Jul-30-3.jpg <http://www.binarydinosaurs.co.uk/tynemouthsw_2018-Jul-30-3.jpg> My duckduckgo-fu has let me down. Cheers! -- adrian/witchy Owner of Binary Dinosaurs, the UK's biggest home computer collection? t: @binarydinosaurs f: facebook.com/binarydinosaurs w: www.binarydinosaurs.co.uk

7 years, 7 months

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Unknown Z80 CPU board and backplane ID anyone?

by w9gb＠icloud.com

Agree about Varian trademark. In 1937 the Varian brothers developed the Klystron tube. In 1965 Eitel-McCullough (EIMAC) merged with Varian Associates, but in 1995 the EIMAC division was ?spun off? (now part of CPI). In 1999, the company was reorganized into three distinct businesses: Varian Medical Systems Inc., Varian Semiconductor Equipment Associates Inc., and Varian, Inc. == The Card Edge connectors on motherboard are Sullins Connector Solutions, Inc. http://sullinscorp.com/catalog/ MPS-0125-50-DW-5H Edge Card Catalog http://www.sullinscorp.com/pdfs/edgcards-catalog.pdf Card Edge Connector, 100 Contact(s), 2 Row(s), Straight, 0.125 inch Pitch, .025? Square Wire Wrap - .610? Insulator Height, Blue Insulator, Raised with .125? Clearance Holes, .190? Contact Length for .025? Square. === For reference purposes, S-100 motherboards use Sullins EBA50DCSD . https://www.digikey.com/product-detail/en/sullins-connector-solutions/EBA50… Greg chicago Sent from iPad Air

7 years, 7 months

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DEC memory and CPUs

by useddec＠gmail.com

More DEC items available. If you have any interest or questions please contact me off list. L4000 KA670 4000/300 I might need one to fill a box. 3 or so boxes also. L4001-Bx X= chip manufacturer MS670 L4001-Cx L4004-Cx MS690 L4004-DF M7606 KA630 Microvax II M7607 MS630-A 1MG M7608 MS630-B 2MG M7620 MVAX CPU M7621 MS650-A 8MB M7622 MS650-B 16MB M8637-Cx 2MG M8637-Ex 2MG I hope there aren't too many typos in here and the info is correct. Thanks, Paul

7 years, 7 months

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Global Village 56k modem for shipping

by mtapley＠swri.edu

All, pursuant to the modem discussion the last couple of weeks, i searched briefly and came up with: Global Village Teleport 56kbps fax/modem in original box (opened and inspected, not tested), includes power supply and software on CD (for Mac OS 8). Cable connects to the Mac serial port (round DIN connector) For cost of shipping; I?ll add some bubble-wrap to the box to kee things from rattling inside and if you are concerned about the original box I?ll add another layer outside. - Mark 210-522-6025 office 210-379-4635 cell

7 years, 7 months

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For anybody who will be arriving at VCF the night before:

by cisin＠xenosoft.com

---------- Forwarded message ---------- Date: Mon, 30 Jul 2018 20:00:50 +0000 From: "[utf-8] Computer History Museum" <marcom at computerhistory.org> Subject: =?utf-8?Q?Up=20Next=20=E2=94=82General=20Magic=20Film=20Screening=20&=20Pane l=20Discussion=2C=208=2F3?= Film Screening?????? and Panel Discussion with Marc Porat, Andy Hertzfeld, Megan Smith, and Michael Stern https://www.facebook.com/computerhistory/ https://twitter.com/computerhistory https://www.instagram.com/computerhistory/ http://www.computerhistory.org/atchm/ ** Friday Nights @CHM ------------------------------------------------------------ ** General Magic ------------------------------------------------------------ ** Film Screening and Panel Discussion with Marc Porat, Andy Hertzfeld, Megan Smith & Michael Stern ------------------------------------------------------------ >From the smartphones that sit in our pockets to an array of technologies we take for granted today, many of the ideas that now dominate the tech industry and our day-to-day lives were born in 1989 at a Silicon Valley startup most of us have never heard of General Magic. Extraordinary creativity, remarkable breakthroughs, fierce competition, hubris and heartbreaking betrayal dominated behind the scenes of General Magic. While some never recovered from the failure that accompanied its downfall and bankruptcy, others went on to soar. The lessons learned at General Magic were instrumental in the creation of the iPod, iPhone, Android, eBay, even in the corridors of President Obama???s White House. And although General Magic died, the concepts and the people who worked there went on to change how the world connects today. Described by Forbes as ???The most important dead company in Silicon Valley??? and combining rare archive footage with contemporary stories of the General Magicians today, this documentary tracks the progress of anytime, anywhere communication from a thing of sci-fi fiction to our modern day reality. Join us for a special screening of this fascinating documentary followed by a panel discussion with former "magicians" Marc Porat, Andy Hertzfeld, Michael Stern, and Megan Smith. Exhibits are free to all event attendees. Join us for Friday Nights @CHM before and after the program! Enjoy food and drinks from Catered Too and extended exhibit hours from 5 to 9 p.m. Learn More (http://www.computerhistory.org/events/upcoming/#general-magic) or Register Now (http://connect.computerhistory.org/pages/events/2018-08-general-magic) ** When Friday, August 3, 2018 5 p.m. Friday Nights @CHM Begins 6:30 p.m. Program Check-in 7 p.m. Screening 8:30 p.m. Panel Discussion 9 p.m. Program & Friday Nights @CHM End Where Computer History Museum (http://www.computerhistory.org/directions/) Speakers Andy Hertzfeld Marc Porat Megan Smith Michael Stern Register Now (http://connect.computerhistory.org/pages/events/2018-08-general-magic) ------------------------------------------------------------ https://www.youtube.com/watch?time_continue=1&v=uTdyb-RWNKo Watch the General Magic trailer! ============================================================ ** CHM (http://www.computerhistory.org/) ** CALENDAR (http://www.computerhistory.org/events/upcoming/) ** VISIT (http://www.computerhistory.org/planvisit/) ** MEMBERSHIP (http://www.computerhistory.org/membership/) ** SUBSCRIBE (https://connect.computerhistory.org/) Want to change how you receive these emails? You can ** update your preferences (https://computerhistory.us13.list-manage.com/profile?u=20bc634cf3d929f8435a…) or ** unsubscribe from this list (https://computerhistory.us13.list-manage.com/unsubscribe?u=20bc634cf3d929f8…)

7 years, 7 months

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Unknown Z80 CPU board and backplane ID anyone?

by mike.niswonger＠cox.net

Don't know the system, but the logo is "Varian Associates"... ??? -- Mike Niswonger On 07/30/2018 12:27 PM, Adrian Graham via cctalk wrote: > Hi folks, > > A friend of mine in the UK is looking for any info on the following boards. The CPU board is marked ?VA 03-907023-00? and features a Z80 with 16K RAM and an 18.432MHz crystal. The backplane is also VA and has 11 132-pin slots that aren?t all identical implying usage for different cards in those locations. Voltages are +5/-5/+12V. > > Pics: > > http://www.binarydinosaurs.co.uk/tynemouthsw_2018-Jul-30.jpg <http://www.binarydinosaurs.co.uk/tynemouthsw_2018-Jul-30.jpg> > http://www.binarydinosaurs.co.uk/tynemouthsw_2018-Jul-30-1.jpg <http://www.binarydinosaurs.co.uk/tynemouthsw_2018-Jul-30-1.jpg> > http://www.binarydinosaurs.co.uk/tynemouthsw_2018-Jul-30-2.jpg <http://www.binarydinosaurs.co.uk/tynemouthsw_2018-Jul-30-2.jpg> > http://www.binarydinosaurs.co.uk/tynemouthsw_2018-Jul-30-3.jpg <http://www.binarydinosaurs.co.uk/tynemouthsw_2018-Jul-30-3.jpg> > > My duckduckgo-fu has let me down. > > Cheers! >

7 years, 7 months

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Troubleshooting HP 2116B

by gerardcjat＠free.fr

Christian, I absolutly agree with David s post. Back in the ' '70 when I was maintaining 3 x HP 2116 B running 24/24 7/7 FOR around 10 YEARS, the ONLY memory related problem that I got was traced to a faulty transistor !! ( But I do not recall exactly, may be it was on a Driver Inhbit Card ) Anyway, from this only one case , not statisticaly signifiant ;-) the problem was a Tx, not a C.I. Wish you the same ...

7 years, 7 months

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SCO Skunkware?

by james＠attfield.co.uk

I have Skunkware 7 (1997) and Skunkware 98 (1998) if they will do. What is your desire? On 7/25/18 6:53 PM, David Griffith via cctalk wrote: > > Does anyone have any Skunkware ISOs from around 1995 to 1998? >

7 years, 7 months

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Microware OS-9 68000 SPF

by david＠thecoolbears.org

Anyone familiar with the SPF file manager on Microware OS-9? I have an MVME162 processor and for no good reason, other than an intellectual exercise, I've decided to try and get OS-9 68000 running on it. Mostly this has been a pretty simple exercise, since the necessary ROM images are on the Internet, however, the one thing that I can't seem to make work is SLIP (or PPP for that matter). I have the MVME board connected via an RS232 connection to a Raspberry PI. PPP doesn't work at all but SLIP works partially. I can PING from the PI to the MVME and from the MVME to the PI. I can send TCP traffic in both directions. I can send UDP traffic in both directions. When I try to start a telnet session from the PI to the MVME, it seems like the session is established: Trying 192.168.2.2... Connected to 192.168.2.2. Escape character is '^]'. But I never see the login prompt on the PI. Pretty much the same thing applies to other telnet clients including Windows, NetBSD VAX and 211BSD on my PDP-11. Furthermore, I see that the connection handler in OS-9, telnetdc, is started and also login is started 20 0 0.0 128 48.00k 0 e 0.03 0:00 telnetdc <pks01 21 20 0.0 128 24.00k 0 e 0.02 0:00 login <>>>pks01 40 0 0.0 128 52.00k 0 s 0.12 25:42 telnetd <>>>nil but I never get a login prompt at the PI. Any suggestions?

7 years, 7 months

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Tim Paterson / QDOS lecture @ VCF West next weekend

by cctalk＠snarc.net

I am excited about this!! Tim Paterson, of Seattle Computer Products, is speaking at Vintage Computer Festival XIII next weekend (August 4-5). The event as always is at the Computer History Museum in Mountain View, California. Tim created QDOS - Quick & Dirty Operating System -- which was the basis for Microsoft's MS-DOS. Tim rarely (if ever?) gives historical lectures, so this is a coup for the hobby. Everything you need to know about VCF West -- online ticketing, all the other speakers, exhibits, consignment, etc. -- is on the VCF web site at http://vcfed.org/wp/festivals/vintage-computer-festival-west/. ________________________________ Evan Koblentz, director Vintage Computer Federation a 501(c)3 educational non-profit evan at vcfed.org (646) 546-9999 www.vcfed.org facebook.com/vcfederation twitter.com/vcfederation

7 years, 7 months

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Sorting a previously undiscovered briefcase of Jack Aldridge the Electrodata /Burroughs maint engineer

by couryhouse＠aol.com

Sorting a? previously undiscovered? ?briefcase of? Jack Aldridge the? ? Electrodata /Burroughs? maint? engineer. All these? years turns? out there were? 2! And? I? thought? one of my assistants? was just moving? it? from one? shelf to another... ? ? found his? b-205? training? certificate!? Yea!? the? 50s! many may many other? ?goodies.... ? and? ?a small? group of? duplicate? ?pristine? B200 or? ?220? instruction? cards anyone? ?got? a? cpu in captivity? ? Back to? sorting... ? Ed#

7 years, 7 months

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national semi NS638 8K 22bit microVax II, etc

by useddec＠gmail.com

I found four of these while sorting through non-DEC boards. I will try to go through more this week. I have a lot of memory including Q-bus, Unibus, and Vax. Please contact me off list if you are interested or have any questions. Shipping from 61853. Thanks, Paul

7 years, 7 months

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WTB: Data I/O 351A-070, 071, 072 Socket Adapters

by systems.glitch＠gmail.com

All, I'm looking for any or all of the following Data I/O Socket Adapters: 351A-070 (8741, 8748, etc) 351A-071 (8751) 351A-072 (8755A) Thanks, Jonathan

7 years, 7 months

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All the Tech You Can Take

by pbirkel＠gmail.com

A recent visit to the Living Computers: Museum + Labs: https://www.washingtonpost.com/lifestyle/travel/a-seattle-museums-tech-bonan za-from-classic-video-games-to-virtual-reality/2018/07/25/16cc1f8c-8a8e-11e8 -a345-a1bf7847b375_story.html ------

7 years, 7 months

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DRIVE 95 a third party add on disc drive for HP95 LX Palmtop for sale or trade NOS untested from SMECC MUSEUM

by couryhouse＠aol.com

DRIVE 95 a third party add on disc drive for HP95 LX Palmtop? for sale or trade NOS untested from SMECC MUSEUM ? Found the? 2? that? ?I had? left over? from the? ?computer business I had in AZ ...? it is NOS? but? untested.? I will keep one? for the museums? collection? at? SMECC? ?the other will be? SOLD? or? TRADED? ?for the museum's? advantage. Will? to listing to? offers? before? I? consider? ?EBAY. ? See? ?www.smecc.org? for? ?areas for possible trades? we? ?save... it is not? just? computers. ? Money offers? considered? too. ? Drop us a not? off-list? with subject of? DRIVE? 95 OFFER in the? subject? line. ? Thanks? Ed Sharpe archivist? for SMECC

7 years, 7 months

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Epson DECTalk IC

by anders.k.nelson＠gmail.com

For those wanting some DECTalk in their lives without the bulk: https://global.epson.com/products_and_drivers/semicon/products/speech/tts_i… There's even a ready to go board here: https://www.adafruit.com/product/924 =] -- -- Anders Nelson +1 (517) 775-6129 www.erogear.com

7 years, 7 months

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how good is the data reliability with CD ROM and DVD RAM?

by carlojpisani＠gmail.com

hi yesterday I was shocked by a couple of videos on Youtube where guys pointed out their negative experiences with CD ROM and DVD RAM as media for their own backup. They complained their data completely lost after 5 years of storage in CD ROMs, pointing out that their CDs were perfectly conserved and kept clean without scratches, but all the data is gone lost since the media is unreadable. This is what they said in the video. I have a lot of backup here stored in CDs, and I have recently bought an SCSI DVDRAM unit to create new backups in caddies DVD-RAMs (of 4.2Gbyte each) what is your experience?

7 years, 7 months

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Troubleshooting HP 2116B

by cc＠informatik.uni-stuttgart.de

Ok, so I've got the computer almost running now. I now need to fix both sense amplifier cards. One (0..4k) sometimes reads a one for bit 3 after the machine has warmed up. The other (4..8k) has a stuck one for bit 7. Swapping these cards make the errors move to the other core bank respectively. I have the newer cards, 02116-6298, not the older 02115-6001 The latter has CA3028A used as sense amplifiers. My card uses HP 1820-0183 (metal can IC from RCA). I guess that it is also a CA3028A or maybe a CA3053. Can anyone confirm this? Next, the manual on bitsavers (02116-9153_2116B_Vol2_Oct70, and the same as found on the hpmuseum site) not only contains some errors (see my other post about the front panel lamps). It has also some badly scanned pages with parts missing, notably page 5-50 (PDF page 350) lacks the right part of the page. Is there a better scan available? My 1968 copy does not list the 02116-6298. Christian

7 years, 7 months

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Advanced Computer Communications UPB-HSIO

by useddec＠gmail.com

Does anyone know anything about these or have any interest in any? Thanks, Paul

7 years, 7 months

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SCO Skunkware?

by dave＠661.org

Does anyone have any Skunkware ISOs from around 1995 to 1998? -- David Griffith dave at 661.org A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?

7 years, 7 months

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Fwd: Looking for an HP16702A or B logic analyser mainframe

by alexandre.tabajara＠gmail.com

Dear friends, I'm trying to find a nice and stuffed 16702A or B to buy, shipped to Brazil or NV, USA. B preffered but I can use the A. I'd rather have it already stuffed (a pair of LA cards, oscilloscope and who know, pattern generator) Anyone willing to part with one? I can do paypal Thanks, Alexandre

7 years, 7 months

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ABLE, other non DEC boards.

by useddec＠gmail.com

I had a nice talk with an old friend earlier today, and we talked about how some companies were so proud of their products that they never put their name on it. Sometimes a logo, sometimes only a part number. Bitsaver is great- I don't don't know what any of us would do without it. But There are a lot of items that, at least I, can't turn up there or on Google. While looking for the ABLE (ACT) board that Mattis was talking about (and I found it for a list member who has first dibs on it) I came across: Computer Consoles 343d01533 Computer interface Tech -looks like a DZ11 clone CMD CDU-700/T witch I think can be upgraded to a M/T SCSI Unibus Simpact Assoc inc ICP-1600 DPD might have been bought out by CDA Computer design and Applicationd.which might be a subsidiary of Analogic. MM3000, 40199 2mg, FPPC Some of these I've heard of, some not. I have a few hundred DEC compatibles, and I'm tired of going through them. Duel, quad, hex, and 780. A lot of Emulex, dilog, ADAC, Data Translations. Please contact me off list if you are interested in any. Pics would be nice. Thanks, Paul

7 years, 7 months

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RK05 spindle pulleys - trade 50Hz vs 60Hz?

by frisbie＠flying-disk.com

Chuck Guzis <cclist at sydex.com> wrote: > In WWII radio equipment, MGs in a unitzed form called > "dynamotors" were used to supply the high-voltage anode voltage > for the tubes. And long after WWII! In the 1960s, I had a Motorola 140D (140 for the power, "D" standing for Dynamoter) mobile radio (6 meter ham band) in my car. Everytime I keyed the mike, the dynamoter would instantly spin up with a loud whine. Such radios were normally housed in the trunk of the car and required heavy wire to carry the 12 volt battery current for the dynamoter. My Monarch 10EE lathe originally came with a big motor-generator to power the variable-speed DC motor. Later versions use thyratrons, while even later ones were solid state, but they all continued to use DC motors. The variable-speed DC drive was very similar (identical?) to elevator drives, known as the Ward-Leonard system. To bring this back to the RK05, someone asked if anyone had a copy of the RK05 IPB. If you still need it, let me know and I'll dig it out. I haven't packed it for my move yet, but the drives are. Alan

7 years, 7 months

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DEC power connectors (UNIBUS PDP-11s, mostly)

by jnc＠mercury.lcs.mit.edu

> From: Ethan Dicks > I just saw that this specific part had a min order. They have a min $10 order on _every_ part, and also a min of $25 on the total order. Noel

7 years, 7 months

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DEC power connectors (UNIBUS PDP-11s, mostly)

by jnc＠mercury.lcs.mit.edu

> From: Ethan Dicks > Min order 14 @ $0.75 each. Uh, no. I think they have a $25 minimum at checkout; try it. Noel

7 years, 7 months

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DEC power connectors (UNIBUS PDP-11s, mostly)

by jnc＠mercury.lcs.mit.edu

> From: Fritz Mueller > If these are what you are talking about, I ordered up a bunch a couple > years ago when I rebuilt the power harness for my 11/45, and can attest > they are the right thing: Yeah, those are the ones. Note that ConnectorPeople has a relatively large minimum order. Quest has the male connectors (i.e. female pins), but not the females. Noel

7 years, 7 months

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HP-2116 front panel lamps

by gerardcjat＠free.fr

When I was "doing sort of " C.E. for 2116 ( 1971 _ 1981 ), we were using CM 380 as replacement. Even longer life !!

7 years, 7 months

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DEC power connectors (UNIBUS PDP-11s, mostly)

by jnc＠mercury.lcs.mit.edu

> From: Mattis Lind > Unfortunately the mate-n-lok which has 8 position and is used for > current loop connectors and H74x plug regulator does not seems to be > available anymore. But it would be nice to be corrected here. According to one dealer Web-site, what I think are those connector shells are now out of production. However, as I indicated, I have located several places that still have some, and I have ordered some to verify that they are the right thing. If they are (they should be here at the end of the week), I will send another message with part numbers, sources, etc. Noel

7 years, 7 months

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how good is the data reliability with CD ROM and DVD RAM?

by cctalk＠ibm51xx.net

>Of course there are. Since both SD cards >and ?SD cards have identical >electrical and protocol interfaces, those >adapters are just passive pieces >of plastic and wires. In fact, a lot of ?SD >cards sold these days come I believe Chuck is looking for the other way SD to micros i.e. a size reducer. -Alo

7 years, 7 months

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Motorola IDP board

by carlojpisani＠gmail.com

hi any chance someone has worked with the Motorola IDP m68EC0x0 board and has the manual of the 68EC020IDP CPU module? let me know p.s. have you ever seen the IDP-net card? any information on the IDP bus timing? (i'd like to develop my own net-card for the IDP bus, but I need the timing spec)

7 years, 7 months

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DEC power connectors (UNIBUS PDP-11s, mostly)

by jnc＠mercury.lcs.mit.edu

So, it turns out the power connectors (plastic female shell with metal male pins, etc) widely used in UNIBUS PDP-11's (e.g. to provide power to backplanes, etc) are still available, if anyone else wants any. (No doubt some of you already knew this; this is for those, like me, who didn't! :-) The 3-pin ones are used for the remote power on/off cables (used extensively in DEC gear, not just UNIBUS PDP-11's). They are 'Commercial Mate-n-Lok', now made by TE Connectivity, who bought AMP. Here are the current part numbers: 1-480305-0 3-pin female shell 1-480276-0 6-pin female shell 1-480277-0 9-pin female shell 1-480324-0 15-pin female shell 60620-1 14-20AWG male pin The 6- and 15-pin are for the backplane power connecters; the 9-pin were used to power backplanes in older machines (e.g. PDP-11/10). There's also a pin for smaller gauge wires, e.g. for the power control cables, but I don't have the number right here. I have checked, and these do plug into old DEC gear properly. I got mine from Digikey; their page for the line is here: https://www.digikey.com/products/en?FV=ffec0ef5 Go to the bottom, where it says 'Housings', and click on that, and they will all show up. (There are cross-links to the pins when you click on a particular shell.) Noel PS: I'm also tracking down the 8-pin connectors used in the H744/H745/etc regulator 'bricks'; an update on them in a day or so.

7 years, 7 months

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DEC power connectors (UNIBUS PDP-11s, mostly)

by jnc＠mercury.lcs.mit.edu

> From: Bill Degnan > is this info on or will be on your wiki? Well, it's not 'mine', but yes, I will be posting it when I find time. Noel

7 years, 7 months

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HP-2116 front panel lamps

by cc＠informatik.uni-stuttgart.de

Hi, I need to replace several broken lamps from our HP-2116B front panel. The old/original ones are CM-345 or OL-345. This makes sense, they are rated 6V 40mA 10000 hours. BUT: The maintenance manual says something different and is even wrong and inconsistent. HP part number is 2140-0035, description "Lamp, Incadescent, 6.3V, 0.75A" This can't be true. 92*0.75A would be 400W alone for the front panel lights... The manufacturer code is 71744 (Chicago Miniature Lamp Works), mfg part number 1775. That is indeed a 6.3V lamp, but 0.075A (better!). Problem: that is a midget _screw_ base lamp, so wrong socket and only rated for 1000h. The panel and switches need a midget flanged base lamp. Who wrote that manual? Was he drunk? ;-) Christian

7 years, 7 months

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PDP-11/23 with RL02 on - eBay US

by u.tagge＠gmx.de

Just spotted this auction on eBay US Item: 263824036905 Location is: Glenview, Illinois Not cheap, but the seller is open for offers. Not affiliated with the seller.

7 years, 7 months

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Scanned a few DEC manuals.

by mattislind＠gmail.com

http://storage.datormuseum.se/u/96935524/Datormusuem/DEC-MS11-HMSB-D_PDP11_… The MS11 main manual above seems to be a later version than the one already available http://storage.datormuseum.se/u/96935524/Datormusuem/DEC-11-H40SA-A-D_PDP-1… Earlier version then the one I found on bitsavers. http://storage.datormuseum.se/u/96935524/Datormusuem/DEC-11-HRJSA-B-D_RJS04… Didn't find much at all mentioning RJS04/03.

7 years, 7 months

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by alemoco4＠gmail.com

Hi Are you still looking to purchase STC executel, I have just found my old one in the cupboard under my bed and could sell. Please email me if interested Regards Peter Sent from my iPhone

7 years, 7 months

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Strange third party board in PDP-11/45

by jnc＠mercury.lcs.mit.edu

> From: Mattis Lind > I will take a picture of the boards in more detail so we can figure out > what they are doing later on. Thanks, that would be really useful. > My understanding is that slot 1AB and slot 26 AB is tied to each > other. So if there would be no expansion unibus there should be a M930 > in each of these slots. The same goes for slots 27AB and 28AB. Right, that's my understanding too. There's a diagram in the "PDP-11/45 Maintenance Reference Manual" (October, '73 edition, on pg. 60 - pg. 66 of the PDF), which gives: - slot 1 - UNIBUS A termination - slot 26 - UNIBUS A cable - slot 27 - UNIBUS B cable - slot 28 - UNIBUS B termination and my read is that the slot 26 cable is 'out to any UNIBUS memory, etc', while the slot 27 cable is 'in from the other machine in the dual-processor system'. (There's an interesting discussion in, IIRC, an RH11-AB - the dual-UNIBUS controller for the MASSBUS - tutorial manual which talks about the M9300, which is a terminator which can produce an NPG in response to an NPR; that is used when people want to attach the RH11-AB's second UNIBUS to the UNIBUS B, when there's no CPU on it. So the M9300 would go in slot 27, and the cable out to the RH11 in slot 28.) > I cannot see how a device in slot 26AB or 27AB would be able to > intercept MSYN here. Not _in_ slot 26 or 27, it's in the cable _between_ them! :-) Look at the common case, where UNIBUS A and B are connected: MSYN comes out of the CPU in slot 26, is jumpered across to slot 27 by the M9200, is carried across the backplane to slot 28, and then out (on either a BC11 or an M920). That dual-card thingy that comes with the Cache/45 would allow (if my surmise about what's going on is correct :-) the Cache/45 to place itself _between_ the MYSN out of the CPU (in slot 26) and the 'MSYN out to the rest of the system' (in slot 27). That does mean no separate UNIBUS A and B. But if my supposition as to how the Cache/45 works (that it fills itself by snooping on UNIBUS B in the MS11 controller slot) is correct, UNIBUS A and B would have to be connected together _anyway_, for that to work. (I _can_ imagine how to do it all without joining the two UNIBI together, but I will skip that for now.) Noel

7 years, 7 months

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Strange third party board in PDP-11/45

by jnc＠mercury.lcs.mit.edu

> From: Mattis Lind > Here is how it is connected: Thanks for that - very informative! > The sandwiched dual boards are sitting in 27 / 26 AB. The board in 27AB > was empty (quick glance), while the board in 26AB has a few TTL chips > on it. Slot 26AB is the Unibus A slot, Slot 27 AB should be a > terminator on Unibus B. I'm more interested in _what_ the two boards are doing! :-) It seems they must be jumpering UNIBUS A and UNIBUS B together. (Which I didn't expect, but maybe... will have to ponder.) As to what _else_ it is doing, and why it has the cable to the main card... I think that it must intercept MSYN from the processor and only let it pass if there's no hit in the cache. (To explain why it would need to do that... normally with the MS11, there's a static partitioning between FastBus memory and UNIBUS A memory. So when the CPU goes to do a memory cycle, it can put the address out on both the UNIBUS and FastBus, with the certainty that it will only get a reply on one. But with the cache, if there's a hit, it would in theory get a reply on both, which might confuse it. Or if it takes the cache copy, and terminates the UNIBUS cycle, that might confuse the memory.) Or maybe I'm confused, because now that I think about it, UNIBUS A goes straight from the CPU to the UNIBUS A out slot, so the Able board couldn't intercept MSYN? I guess I need to understand the fine details of the UNIBUS A and B stuff, maybe it will make sense at that point. Oh, wait a moment: slot 26 is UNIBUS A out, slot 27 is 'UNIBUS B in', and slot 28 is UNIBUS B 'termination'. (27 is 'in' because when the M9200 is installed in 26/27 to join the two UNIBI together, obviously one has to connect an 'out' to an 'in'... and then 28 is not 'UNIBUS B termination', it's 'UNIBUS out' to the rest of the system. OK, so that works - MSYN coming out of slot 26 is intercepted by the dual double-card, and is only allowed to pass on cache miss. Yeah, that sounds like it should work. > The hex ABLE/ ACT board sits in slot 21 which is the memory controller > board for the MS11. One of two; the other is slot 16. > From: Paul Birkel > I wonder whether this CACHE/45 can coexist with MS11 memory on the > Fastbus itself According to that marketing thing you found, "User may optimize hit ratio by upper/lower limit switch settings", so one would have to configure the Cache/45 to not cache the block that the 'other' MS11 controller thinks it owns... otherwise both might respond to requests for addresses in that range.... :-) Noel

7 years, 7 months

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Anyone in Europe with a North* Horizon or Advantage in working condition

by dkelvey＠hotmail.com

Hi I'm trying to assist Jeff with HxC to create a Gotek that can work with the North* hard sectored disk. It has been problematic because of timing constraints. Jeff has been working with several in the US but it is difficult to see what factors are important, working remotely. Jeff is in Paris, France. It would be great if he could get hands on access to one of these machines for a month or so, that was operational. Dwight

7 years, 7 months

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Printerworks?

by cisin＠xenosoft.com

Has printerworks gone under? Their website is unresponsive. Does anybody have scans of their CX and SX "catalogs"? -- Grumpy Ol' Fred cisin at xenosoft.com

7 years, 7 months

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RK05 spindle pulleys - trade 50Hz vs 60Hz?

by mattislind＠gmail.com

Hello! I have two RK05J-AA as part of a system that I guess has been imported used form the US. A DC-10 simulator. The only difference is the pulley, the motor position and a 230 / 115 V jumper inside. Is there anyone in 60Hz land that has the opposite problem and want to trade two spindle pulleys? The good thing for me that I would guess that it possible to use a lathe to get the diameter down to the correct 50Hz diameter. On the other hand going >from 50Hz to 60 Hz is tougher... Then there is a PC05 that has the wrong number of grooves on the motor pulley. Apparently it should be 16 instead of 20. Now in 50Hz land the only difference is that the punch would be slower than it should be. Using a 50Hz punch in 60Hz area might get you into problems, so maybe there is someone here as well that want to do a trade? /Mattis

7 years, 7 months

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Strange third party board in PDP-11/45

by jnc＠mercury.lcs.mit.edu

> From: Paul Birkel > Unfortunately there's not much documentation for the MS11. ??? We're actually pretty well off, there; we have: - MS11 Maintenance Manual (DEC-11-HMSAA-D-D) - MS11 MOS Memory Troubleshooting Guide (DEC-11-HMSTS-A-D) - MS11-B Engineering Drawings About all we're missing are the MS11-A/C data board engineering drawings. (The control board is in the MS11-B prints.) > From: Mattis Lind > This could mean that 16 bit data is in the L chips while the faster > chips are used for a 10 bit cache tag. Sounds plausible. > And of course those two I/O connectors don't belong on a cache. > ... > Those IO connectors are connected to two double height boards in 26 /27 > AB. They are also made by ACT and contain a few TTL chips. If the board is a cache, how does it get filled? It would have to listen to the UNIBUS the memory is on. So I'm guessing that's that those connectors and boards are for. Note that there has to be a signal from FastBus (anyone know the correct capitalization for that?) which tells the CPU if the MS11 has a given address or not (given the way the MS11 can be configured as to size and address), so the cache board could use that line to tell the CPU whether or not the location in question is in the cache. Noel

7 years, 7 months

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Landfill?

by cisin＠xenosoft.com

Is there ANY interest in Courier 56K V.92 modems? Laserjet IIP printers? Parallel port and/or SCSI flatbed scanners? (home office, NOT professional) Oversized PC cases with MANY drive bays? Generic 386? PCs? Is it worth even hauling that kinda stuff to VCF?

7 years, 7 months

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And if you collect hp. which... we do of course at SMECC so need to hear if you qall have any of this.

by couryhouse＠aol.com

And? if? ?you? collect hp.? which...? ?we? do? of? course at? SMECC? so need to hear? if? you? all have any of? this. ? The scanjet? ?BW? is? ?first? HP...? and? ?scanject 2c? is? first? color scanner? hp always? accepting? gifts? of these? 2. ? IN? hp lasers? ? 2686a? ?first HP laser...? ? ? then there is a? first? color? laser? HP? too ( if? you can lift it.) ? Would also suggest saving and? we need a? clean one? ?hp? 500? which? was a? 2886a? with a? bunch of? bins? was? damn? expensive? ?so not a lot? of them around compared to? 2886a ? Office jet.... hp? officejet ( no suffex? ? had? deskjet? ?printer? in? it.? ? was? first as I? remember ? HP? Paint jet? ?first? color....? we need one...? uses? tracer feed? paper.? just? found? my old? sales? binder? for it? with all the? samples etc? as? issued? by hp ? ? NEED? HP 3000? cx? series? II? series III? Model? 30? model? 40? etc etc etc ? ? ? Looking for? ? HP? VECTRA? Has bizzare? moue? interface etc... ? HP? 150 -? WORKING? OF? NOT? PLUS - -Looking? ?for? any AND? ALL hp? 150? PARTS? PIECES SALES? LIT? ? POSTERS? WITH MONARCH BUTTERFLY? ETC... ? Looking? ?for? ?some? HP? calc? stuff Looking? for? HP? 110? portable? and portable? plus? ?also? NEED VECTRA? CS PORTABLE (Bless its? wretched? soul!) ? ? I? guess if? it? ?says? HP? would? like to? hear? about it. ? ? HEY LOOKING? FOR? ANY? ?ADVERTISING? ITEMS? FROM? COMPUTER EXCHANGE? PHX? TOO! ? Ed Sharpe Archivist? for SMECC ( Retired? CEO? Computer Exchange? ?Phx? ?AZ)

7 years, 7 months

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Got a kidney!

by dseagrav＠lunar-tokyo.net

Got the call yesterday. Transplant operation was a success. Still at the hospital recovering. Will update when able.

7 years, 7 months

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SDL and SunOS

by dave＠661.org

How feasable is it to compile and run SDL for SunOS? My main reason for doing this is to play Z-machine games on Sparcstations using Frotz (https://gitlab.com/DavidGriffith/frotz) using the SDL interface to play V6 games. -- David Griffith dave at 661.org A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?

7 years, 7 months

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MVME188 backplane jumpers

by bear＠typewritten.org

Does somebody know how to set the IACK and BG backplane jumpers for the MVME188 CPU? Remove them all? Leave them in behind the memory and/or cpu board(s)? Something else? All the documentation I can find are for the normal VME SBCs, which the 188 isn't. Thanks! ok bear. -- until further notice

7 years, 7 months

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Strange third party board in PDP-11/45

by syseng＠gfsys.co.uk

> Message: 1 > Date: Sun, 22 Jul 2018 09:22:25 -0400 (EDT) > From: jnc at mercury.lcs.mit.edu (Noel Chiappa) > To: cctalk at classiccmp.org > Cc: jnc at mercury.lcs.mit.edu > Subject: Re: Strange third party board in PDP-11/45 > Message-ID: <20180722132225.49A0B18C096 at mercury.lcs.mit.edu> > > > From: Paul Birkel > > > ABLE Computer Technology. Their first product was PN 10001 ... the > > A.C.T. Univerter > > This board is not shown in any of the Able brochures we have: > > http://bitsavers.trailing-edge.com/pdf/able/brochures/ > > However, Able info is _very_ thin on the ground, now... > > Noel There was a Univerter and Qniverter (sp) which were used to translate from unibus to qbus.Very useful boards and used one to translate from vax730, vms 4.3 to a qbus expansion box, so I could use an RQDX3 and RD53 as vms boot. Just set up the dipswitches and it works automagically at power on. May have docs somewhere, but not sure where... Chris

7 years, 7 months

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Looking for Tektronix 4052 R12 Graphics Enhancement ROM Pack and Tektronix 4014 demo files

by mmcgraw74＠gmail.com

I have been recovering dozens of old Tektronix 4050 series tapes and found one with Fast Graphics software for the 4051. This software program jumped into 6800 assembly code and retrieved three bytes per vector from a tape file. Apparently this tape is a duplicate - and it appears that all the files bigger than 1KB have corrupt data. Apparently from the 4014 programmers guide - they had a set of demo picture files including a list with R2-D2. I have found Jos Dreesen's ftp tar file with some 4014 pictures - but I'm looking for an R2-D2 picture file that is on the tape I have but corrupt. I also discovered that Tektronix made a 4052/4054 R12 Graphics Enhancement ROM pack which included the Fast Graphics program in ROM. I would love to find one of those ROM packs - hint/hint :) I did recover one of the shorter picture files of Snoopy - but since I don't have a 4051, I can't run the Fast Graphics program on my 4052 or 4054. One of my buddies threw a C program together to convert the data file into Tek 4050 PRINT statements. I've posted the SNOOPY basic program and screenshots of running it on vcfed in a new thread: http://www.vcfed.org/forum/showthread.php?64726-Tektronix-4051-4052-4052A-4… I'm also still looking for a 4051/4052 Display Board. Mike Haas posted pictures here in Oct 2016 of lots of Tektronix boards including a Display Board - but I don't have any direct contact info for him. Monty

7 years, 7 months

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68k development, Avocet Development

by harper＠secureoutcomesinc.com

Greetings to the List - Carlo, I have been using IDE68K out of Norway for about five years and it is excellent: http://home.kpn.nl/pj.fondse/ide68k/ It includes the 68020 instructions such as bit instructions etc - also floating point. I only use the assembler and download S-records to the MVME177-005 boards that I use. I have never found any bugs etc. Best, Jack At 12:46 PM 7/20/2018, Carlo Pisani via cctalk wrote: >hi >does anyone happen to use Avocet Development Tools for m68k? >how good/bad is it? ---------------------------------------------------------------------------------- Jack Harper, President Secure Outcomes Inc 2942 Evergreen Parkway, Suite 300 Evergreen, Colorado 80439 USA 303.670.8375 303.670.3750 (fax) http://www.secureoutcomes.net for Product Info.

7 years, 7 months

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how good is the data reliability with CD ROM and DVD RAM?

by dmonnens＠gmail.com

> > I have a lot of backup here stored in CDs, and I have recently bought > an SCSI DVDRAM unit to create new backups in caddies DVD-RAMs (of > 4.2Gbyte each) what is your experience? I recently disposed of a couple hundred DVD and CD backups I'd made. As mentioned in a previous comment, it's simply too impractical to store terabytes of information in 4.7GB segments, plus they take up a LOT of space. HDDs aren't the most reliable, but this is what I use now for that reason. I make sure to keep the previous backup in case something happens. I'll only use optical backups now with the most important data. Backblaze has some interesting stats regarding HDD reliability (they are a data center using thousands of drives running constantly): https://www.backblaze.com/blog/hard-drive-stats-for-q1-2018/ As noted previously, beyond storage conditions, disc longevity depends on the types of dyes used in the discs. Gold is supposed to be best. Early on, they experimented with a wide variety of dye types, and the silver dyes were least reliable, oxidizing in only about 10 years. The thing is, no media format is going to last forever. The only really reliable way of keeping data around is multiple backups and data migration. Basically, for your really important stuff, you'll want a couple of backups, stored in different geographical locations (one local, one on cloud works, too). You'll want to periodically refresh the backups by migrating the data onto fresh media. In the preservation business, the ideal is to refresh after the cost of storage media is 1/2 of the initial investment. So, if you paid $1 a GB for the initial storage media, you'll want to migrate once the new format is $0.50 a GB, and then again when it is $0.25 and so on. This way, the total cost is double what you initially invested. Of course, while the cost per GB might drop steadily, the total amount on a particular media format will increase as well, such that the $150 HDD you bought 5 years ago will have twice the storage for...$150. Definitely open to other suggestions.

7 years, 7 months

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DEC uNotes

by jnc＠mercury.lcs.mit.edu

> #30 "PMI on KDJ11-B and MSV11-J" So it turns out there are _two_ uNote sets, with overlapping numbers! (A fact about which I was previously unaware!) I have two PDF files of the collections; micronoteReprints.pdf (the first set), and oemMicronotes.pdf (the second). Note! There's an index to the first set at the back of the second, and it lists 111; but the ToC for the first one only lists 85! But they are in fact all there (and more; the ones there go up through 115). Noel

7 years, 7 months

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PDP-11/84 Qbus slots for memory

by jnc＠mercury.lcs.mit.edu

> From: Charles Dickman > an 11/84 with the UNIBUS adapter and PMI memory does not have a Qbus. > ... the KDJ11-B (M8190) bus protocols change when a KTJ11 (UNIBUS > adapter) is present and so what would be expected to be Qbus isn't. Ah, excellent point. Looking at the description of the CPU/UBA adapter in the KDJ11-B User Manual (EK-KDJ1B-UG-001, pp. 7-6 to 7-9), the answer is not certain; it all depends on implementation details on the CPU card which aren't described. E.g. the DMA cycle _might_ work, it all depends on what happens at step 8 when, instead of PBSY being asserted, BSYNC is asserted. The _memory_ will be fine (since in an -11/83, this kind of thing is expected)... but the _CPU_, who knows. Interrupt cycles are more problematic; the assertion of the interrupt level on the BDAL lines (step 1a) will probably pass, but step 6 (assertion of BSACK) may be an issue, since the device will want to assert BRPLY instead (BSACK is not used in a QBUS interrupt), and the CPU may not do the right thing. > I think there was a DEC Micronote that explained the protocol > modifications involved. I don't think so; #30 "PMI on KDJ11-B and MSV11-J" describes the _basic_ PMI, but the interaction with the UBA isn't described there. But the KDJ11-B User Manual has it in some detail. Noel

7 years, 7 months

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ps/2 Keyboard with 3 button trackball

by carlojpisani＠gmail.com

hi I am looking for a ps/2 keyboard with a 3 buttons trackball I am currently using a Cherry's kb, but it has a built-in 2 buttons trackball and the software I need to use requires the third button to select items what do you suggest, guys?

7 years, 7 months

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CoCo OS/9 was: TRS-80 floppy

by chd＠chdickman.com

So what does it take to get OS/9 running on a Radio Shack Color Computer? I have a Color Computer 2 (? 64k and non-chicklet keyboard) and have always wanted to get it working with a disk OS. What do I need? I see a reproduction floppy disk controller on ebay. I would rather skip that and go straight to some kind of sold state memory. Suggestions or pointer to active groups? On Sun, Jul 22, 2018 at 5:31 PM, W2HX via cctalk <cctalk at classiccmp.org> wrote: > Not mine, just thought it might interest some here > https://www.ebay.com/itm/202376723756 -chuck

7 years, 7 months

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Strange third party board in PDP-11/45

by jnc＠mercury.lcs.mit.edu

> We're actually pretty well off, there; we have: > - MS11 Maintenance Manual (DEC-11-HMSAA-D-D) > - MS11 MOS Memory Troubleshooting Guide (DEC-11-HMSTS-A-D) > - MS11-B Engineering Drawings There's also a little bit about the MS11-C (not covered in the documents above) in EK-11045-MM-007. There is a later rev of the MS11 manuals, which does cover the MS11-C; Chuck McManis had both of them: EK-MS11A-MM-006 MS11-A,B,C memory systems maintenance manual EK-MS11A-OP-001 MS11-A,B,C memory systems users's manual but when I contacted him about them a while back, he wasn't sure if he still had them, or if he'd given them to Al K to scan and put up (he was on the road at the time, so couldn't check if he still had them). Al, are they in your queue somewhere? (No rush to do them, if so; I just want to make sure we know where they are.) > If the board is a cache, how does it get filled? It would have to listen > to the UNIBUS the memory is on. ... Note that there has to be a signal > from FastBus ... which tells the CPU if the MS11 has a given address or > not ... so the cache board could use that line to tell the CPU whether > or not the location in question is in the cache. Studying the MS11 Maint Manual, the MS11 controller has access to the full address and data from both the CPU (FastBus) and UNIBUS B. (The FastBus actually has two uni-directional data busses; in and out.) So all that info, this hypothetical cache board can get from the slot it is plugged into (assuming the cache is plugged into one of the controller slots), over its connector pins. The connectors on the back of the card, and two small boards, must be for listening to UNIBUS A (in configurations in which the two UNIBI aren't joined together)? (I'm too lazy to check the slot numbers are see what they actually are.) And there is indeed a signal which the MS11 uses to tell the CPU it has the location the CPU is asking for, so it's theoretically possible to build a cache card that plugs into a FastBus slot. Noel

7 years, 7 months

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PDP-11/84 Qbus slots for memory

by mark＠matlockfamily.com

The PDP-11/84 uses the M8190 CPU that is also used in a PDP-11/83. The 11/83 and 11/84 use PMI Memory but the 11/83 also can use Q22 memory. With the 11/83 the position of the memory board (assuming one is using the MSV11-JD or JE) above the CPU uses PMI and below the CPU in the backplane uses Q22. In the 11/84 the CPU is above the MSV11-JE memory but the CPU only uses PMI to talk to memory. diagrams in the Unibus processor handbook indicate that the M8191 Unibus map board only communicates through the PMI bus to both memory and to the CPU. Now my question is, there are 3 Bus slots in the 11/84 above the Unibus map board, would it be possible to put a dual width Q22 I/O board in the second memory slot (not the PMI side of the slot) and have it able to DMA into the MSV11-JE? If so then something like an Emulex UC07 and a SCSI2SD card could make a cost effective disk solution, since Unibus SCSI controllers are so expensive. Mark

7 years, 7 months

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Semi-OT: Hitachi Seiki Micon16-II

by jplist2008＠kiwigeek.com

Good arvo all; A family member recently purchased a rather large CNC which uses a Micon16-II system (as well as a Fanuc 15M) to drive it. Unfortunately the battery for the RAM died during storage prior to him getting it and all of the ladder logic is gone. We'd really love to try and find some kind of technical manual for the 16-II, or anything really, to assist in talking with the machine and interrogating it's state. We have a copy of the missing ladder logic in paper form so we're not totally out of luck, but the ability to enter it in segments rather in one 40 hour slog might be nice. If anyone has anything easily sharable we'd very much appreciate the assistance; Thank you. - JP

7 years, 7 months

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Saturn V program punch card decks

by BHuntsman＠mail2.cu-portland.edu

Anyone see this? https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2F… Hopefully the new owner will read it in and make the contents available. Looks like a fascinating piece of history! Pushing a tad rich for my blood though given that I don?t have a card reader

7 years, 7 months

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MOS MCS2529 math chip

by jules.richardson99＠gmail.com

Anyone got pinout/spec information for a MOS MCS2529? In particular, I'm curious about operating voltage. I acquired a Melcor SC-635 calculator yesterday and there seems to be some uncertainty about the output voltage of its (rechargeable) battery pack; some places say 2.4V, i.e. the pack is a pair of 1.2V cells, but others say 9V. 2.4V seems a little low to me for typical logic, but on the other hand I've seen a period ad which says that the external PSU was 9V - and so the rechargeable battery must have been somewhat less than that. cheers Jules

7 years, 7 months

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PDP-11/84 Qbus slots for memory

by jnc＠mercury.lcs.mit.edu

> From: Mark Matlock > With the 11/83 the position of the memory board ... above the CPU uses > PMI Yes, through the C-D interconnect; described in detail here: http://gunkies.org/wiki/CD_interconnect#Use_by_PMI The 'above' is because the CD interconnect is not a true bus, it only interconnected pairs of slots. > In the 11/84 the CPU is above the MSV11-JE memory The PMI is still on the CD connector in this machine, but the PMI is wired as a true bus on the backplane, allowing that ordering. > there are 3 Bus slots in the 11/84 above the Unibus map board, would it > be possible to put a dual width Q22 I/O board in the second memory slot > (not the PMI side of the slot) and have it able to DMA into the > MSV11-JE? It is speculated that this should be possible, but there are jumpers on the backplane you'd need to pull. See the writeup here: http://gunkies.org/wiki/PDP-11/84#QBUS_slots Noel

7 years, 7 months

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