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

by mokuba＠gmail.com

After some downtime recently due to a hard drive failure, I've received a new ESDI drive! 30mb this time, but from a good source. Should be up again later tonight! On Sun, Feb 8, 2015 at 3:47 AM, Gary Sparkes <mokuba at gmail.com> wrote: > +1-410-734-6804 best bbs in the world > > .... mainly 'cuz it's in my bedroom. > > I even have a legitimate Wildcat! 4 license! >_> > > Hosted on an IBM PS/2 Model 70 with 8MB ram and a 130MB ESDI HDD. > Blue Lightning version, too, so it's a blazing fast 486 instead of the > normal 386 model. > > -- > Gary G. Sparkes Jr. > KB3HAG > -- Gary G. Sparkes Jr. KB3HAG

11 years, 3 months

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DESQA Manual?

by robert.jarratt＠ntlworld.com

I picked up a DESQA recently which seems to be configured for thinwire rather than AUI. There is no external switch for it and I can't find a manual to tell me how to swap it to AUI. Does anyone have a scan of the manual? BitSavers doesn't have it, and the Manx link is broken and is probably only for the ToC. Regards Rob

11 years, 3 months

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DEC manuals: interest to scan it?

by shadoooo＠gmail.com

Hello, I have the following manuals, I could scan them if not already available somewhere. Al, please could you check if you have all of them on bitsavers, or if you need some parts to be rescanned? FORTRAN 77 AD-L979A-T1 F77 LANGUAGE REFERENCE MANUAL AD-1884D-T1 F77 USER GUIDE AD-1874C-T1 F77 OBJECT TIME SYSTEM REFERENCE MANUAL AA-JQ94A-TK F77 DOCUMENTATION SUPPLEMENT PDP11 FORTRAN AA-1855D-TC FORTRAN LANGUAGE REFERENCE MANUAL AA-1936F-TC FORTRAN USER GUIDE RSX-11M AE-H653B-TK SOFTWARE PRODUCT DESCRIPTION AA-2593M-TC INFORMATION DIRECTORY AND MASTER INDEX AA-2573I-TC RELEASE NOTES AA-W259F-TC UPDATE NOTES REV A AA-L763B-TC INTRODUCTION TO RSX-11M AI-Y508B-TE GUIDE TO VAX/VMS FILE APPLICATIONS AA-D035D-TE FORTRAN USER GUIDE AA-H953E-TE FORTRAN INSTALLATION GUIDE / RELEASE NOTES AA-KN06A-TE VAX/VMS RELEASE NOTES V4.6 AA-R429A-TE VAX11 DECGRAPH USER GUIDE AA-1749E-TC PDP11 COBOL AA-L672C-TC RSX-11M COMMAND LANGUAGE MANUAL AA-L671A-TC RSX-11M BATCH AND QUEUE OPERATIONS MANUAL AA-FD05A-TC INDIRECT COMMAND PROCEDURE MANUAL VT240 PROGRAMMER REFERENCE MANUAL VOLUME 1 AA-H625C-TC RSX-11M SYSTEM GENERATION AND INSTALLATION GUIDE AA-JK92A-TE INTRODUCTION TO DATABASE DEVELOPMENT AA-93A-TE INTRODUCTION TO APPLICATION DEVELOPMENT AA-Y501A-TE GUIDE TO USING DCL AND COMMAND PROCEDURES ON VAX/VMS AI-Y516A-TE VAX/VMS MINI REFERENCE AA-FB84A-TE GUIDE TO CREATING MODULAR PROCEDURES ON VAX/VMS Andrea

11 years, 3 months

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VAX tests?

by mouse＠Rodents-Montreal.ORG

[Teal deer: I'm looking for generic any-VAX MMU-hardware test code.] Some of you may recall that I've mentioned, a few times, that I've got a MicroVAX-II emulator I've been working on. I think it's most of the way there - seems to me I'm into the last 10% of the work which takes the second 90% of the time. :-) But when I netboot NetBSD and start to run it diskless, I get peculiar crashes which make me think I'm mis-emulating the MMU somehow. Basic operation seems to work fine - cd, ls, and the like - but under conditions the details of which I haven't pinned down yet, I get crashes like pid 65 (install), uid 0: exited on signal 11 (core not dumped, err = 14) panic: pmap_protect: outside P0LR Stopped in install at _pmap_protect+0xdf: movl $15, r8 db> I can reproduce it relatively reliably, but it takes about five minutes to do so. I'm trying to reduce the test case to something a bit more manageable, but, in the meantime, I also thought it might be worth asking after possible thorough test code. I have some test code, but it seems to be for bigger machines - 780, 8600, and the like. I searched for KA630 and I searched for MicroVAX (case-insensitive); the former gave no hits and the latter only two. One MicroVAX hit was a message in one test saying H-Floating instructions are not part of the MicroVAX instruction set, therefore tests 71 - 98 are not executed. The other was in a .hlp file, describing the use of the ATTACH command: 2 MicroVax DS> ATTACH Device type? LESI Device link? HUB Device name? DAA UDAIP? 772150 [...] Collectively, these make me think the tests I have probably predate the MicroVAX-II. I'll be trying to get the diagnostic supservisor netbooted, but it doesn't look designed for netbooting, and it's not clear to me that any of the tests are sufficiently generic to be of any use here. So, while I will be pursuing this on my own, I'd be interested to hear if anyone has any test code I might be able to get my hands on that's generic (or uV2-specific) and might indicate what's wrong in a useful way. (Useful to a simulator author, that is; "PCRB L from U248 not getting to U144, or U248/U144 bad" is not useful, whereas "translation not valid fault is pushing a partially incremented PC" is useful. :-) /~\ The ASCII Mouse \ / Ribbon Campaign X Against HTML mouse at rodents-montreal.org / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B

11 years, 3 months

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M4data model 9914 tape drive

by shadoooo＠gmail.com

Hello, I managed to repair the SCSI board of my tape unit. In the end it was fairy simple, just one bus buffer not working as expected. On SCSI board I have ROM 193996 rev 10, while on control board ROM 123248 rev 30 and ROMs 123615/123616 rev 06. Could worth to update it for better tape reading support or compatibility? Anybody has some more recent ROM? If anybody is interested, I can share the ROM images. Andrea

11 years, 3 months

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Recommendation for a PROM burner

by marc.verdiell＠gmail.com

>Jay wrote... >Data I/O 29B with Unipak2 Nice and very vintage! But not cheap (>$400?). http://www.ebay.com/itm/like/330940089317?lpid=82&chn=ps What about the modern TL866? Anybody has experience with these? https://www.youtube.com/watch?v=FLG03f_ua5g - Marc

11 years, 3 months

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VCF Midwest 10

by computerdoc＠sc.rr.com

Hi Lawrence, I am going to have to go to this year's VCFM10! It sounds Awesome! Kip Koon computerdoc at sc.rr.com http://www.cocopedia.com/wiki/index.php/Kip_Koon > -----Original Message----- > From: cctech [mailto:cctech-bounces at classiccmp.org] On Behalf Of Lawrence Wilkinson > Sent: Friday, March 13, 2015 5:20 PM > To: cctech at classiccmp.org > Subject: Fwd: VCF Midwest 10 > > Sorry, but Jason's original message was dropped by cctech, so here it is: > > -------- Forwarded Message -------- > Subject: VCF Midwest 10 > Date: Fri, 13 Mar 2015 13:07:16 -0500 > From: Jason T <silent700 at gmail.com> > To: General Discussion: On-Topic and Off-Topic Posts > <cctalk at classiccmp.org> > > > > The silence may have led you to believe that it was all over. Oh no... > > The 10th Vintage Computer Festival is a GO! > > Bigger, bolder, nerdier than ever, a wonderful way to tack on our > second digit, VCFMW10 will be held August 29-30 at the Holiday Inn > Chicago-Elk Grove Village. A remarkable convergence of amenities and > price have come together in this spot. Among the features: > > - A single 4550 sqft banquet hall - at long last, VCFMW and ECCC shall > truly be one! > > - First-floor facilities - no more elevator rides or Level of Discharge! > > - 11'x12' loading doors that open direct to the parking lot - you > could drive a truck right into the ballroom, but don't! > > - A separate room for talks, videos, quiet time, etc - like we're a > real conference or something! > > - No (known) conflicts with holidays, wives' birthdays or other local events! > > - The quaint, vaguely Blade Runner-esque surroundings of industrial > parks, truck depots and factories - just the way we like it! > > - An on-site restaurant, pool, exercise room, outdoor firepit/smoking > area, shuttle buses to/from the airport and Woodfield mall, close > proximity to fast-food and the two greatest Chicago eateries, > Portillo's and Lou Malnati's! (Seriously, those two alone are reason > enough to attend.) > > I have updated the http://vcfmw.org web page and FAQ with most of the > information we have so far. Please give them a read before posting > questions. Hotel room rates will be slightly higher than last year's > $79 at the Fairfield Inn; I am still negotiating the block rate. Due > to the restaurant being on-site, there will be no continental > breakfast. Sorry :( > > Now the hard sell: all of this geek-luxury does not come without a > price. Some of you know that the deal we had at the Heron Point was > extraordinary and unheard-of in the event hosting business. Since the > HP no longer rents to the public, we were faced with the choice of > resting on our successful nine-year record or figuring out a way for > the show to go on. And go on it shall...with your help. Without > getting into specifics, the cost of putting on VCFMW has more than > doubled - and we are getting a bargain if our comparison shopping is > to be trusted. > > Donation links have been set up on the main VCFMW page for PayPal and > GoFundMe sites. Please use the GFM only if you do not have a PayPal > account, as GFM charges us a fee. If you'd prefer to donate in > person, contact me directly. I will get you a receipt (sorry, we're > not a 501.3c yet, so it won't be tax-free.) The main site features > our non-patented Donate-o-Meter which will (more-or-less) track our > progress. We have a lot of time to reach our goal as payment is not > due until the day of the show. > > Extra money raised will be either spent on bonus features for the show > (more space, pizza bar, etc.) or put into a fund for next year. We > will engange with the community as much as possible before making any > decsion regarding extra funds. > > There will be much to do between now and August - a new floor plan to > design, tables to allocate, speakers to recruit. But our first big > task is one where everyone can help: let's get the word out! Many of > you are on forums that I am not, so spread the news: the show will go > on! > > -j >

11 years, 3 months

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Another New Zealand Bits&Bytes scan

by terry＠webweavers.co.nz

Through the efforts of a volunteer, I've re-started uploading scans of New Zealand Bits & Bytes, Browsing through the pages might be of interest to some. This one is from February 1987. Among other things there are reviews on the Commodore PC/AT and the Apple IIGS. It also includes an article I co-wrote on a simulation I developed for my students. http://www.classic-computers.org.nz/bits-and-bytes/issue5.5.htm Other issues will be uploaded when Richard (the volunteer) gets time to scan them. Terry (Tez)

11 years, 3 months

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Another question about core sense amplifiers

by jnc＠mercury.lcs.mit.edu

> From: Brent Hilpert > Similarly, the address-line drivers use a center-tapped primary > configuration as a cheap way of providing the bi-directional drive > current for the address wires (like push-pull audio). On re-reading this, to ensure that I had fully extracted the content into my brain, I realized I didn't fully grok this. Could you expand a tiny bit on this (and especially the push-pull reference)? On thinking about it, I guess that what's happening is that there are two driver transistors, each attached to the center tap and one end, but with the polarity reversed. A positive pulse through one produces a positive pulse on the output secondary, whereas a positive pulse through the other produces a negative pulse on the output secondary. Or am I mis-understanding? What I don't get is why that's better than simply attaching two opposed transistors directly to the address lines, as one sees in the output stages of audio amplifiers, to handle the two halves of a sine wave. Noel

11 years, 3 months

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New scans.

by geneb＠deltasoft.com

I've uploaded the issues of International Journal of Computer Forensics and the Z-Letters I got from Chuck a while back. They're on http://www.retroarchive.org All scans were done at 600dpi. I'll be getting them uploaded to the IA as well. g. -- Proud owner of F-15C 80-0007 http://www.f15sim.com - The only one of its kind. http://www.diy-cockpits.org/coll - Go Collimated or Go Home. Some people collect things for a hobby. Geeks collect hobbies. ScarletDME - The red hot Data Management Environment A Multi-Value database for the masses, not the classes. http://scarlet.deltasoft.com - Get it _today_!

11 years, 3 months

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Terak 8512 external 8 inch floppy drives

by jfoust＠threedee.com

I'm tinkering to connect the CBMStuff.com SuperCard Pro to eight-inch floppy drives. The SuperCard has a contemporary 34-pin floppy connector. The Terak 8510 main unit held a drive and its system cards, and its external 8512 drives just held a power supply and a floppy drive. The ribbon cables between 8510 and 8512 are 40 pin. The 8512 doesn't have its own power switch. The back of the 8512 has a small circuit board. (And by "back", I mean the board is actually exposed, which seems odd for a computer that's otherwise built as robust as aircraft or mil-spec.) It accepts the 50-pin cable from the internal floppy drive and has two 40-pin male for daisy-chain ribbons to the 8510 and additional 8512. The board has a socket for a drive terminator and a DIP for setting the drive ID. The 8512 power supply has a relay that must be sensing a signal on the 40-pin cable, as that's what turns on the 8512. Similarly, the Terak main unit's single power switch controls the Terak mono monitor. I haven't traced the signals on the board yet, and I have not yet found a doc that explains the cable pin-out. Because I have a bunch of 8512, it would be convenient for me to be able to use them as self-standing eight-inch drives. I purchased one of John Wilson's 50-pin Shugart to 34-pin adapters for its generation of the TG43 signal and the LED blinkenlightz. I'm tempted to tease out the Terak's 40-pin pinout and perhaps make some sort of adapter to go to 50-pin. - John

11 years, 3 months

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MicroVax II in original DEC Rack on Ann Arbor MI Craigslist

by slandon110＠gmail.com

Thought id share this with you guys. http://annarbor.craigslist.org/sys/4913726464.html He says his bottom dollar is $250. I could possibly coordinate pick up if someone out of the area wanted it. Just cover my gas is all I ask. Steve

11 years, 3 months

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MicroVax II in original DEC Rack on Ann Arbor MI Craigslist

by tiggerlasv＠aim.com

The BA23 isn't as stripped as mentioned earlier. The front-panel bezel can be seen laying in the bottom of the rack, and the back door to the chassis is present, with no empty filler plates. I've seen photos of the inside of the chassis, so I have some information on the contents - The backplane is fully populated with boards -- there are no empty slots. 1.) Some sort of MicroVAX CPU, with unknown amount of memory. 2.) 2 x Emulex CS02's (32 serial lines total) with the possibility of the rack-mount bulkheads. 3.) RQDX3 controller 4.) TQK50 controller 5.) DZV11 controller There is another quad Emulex board (model unknown) as well as an unidentified dual-wide board. One of these is a pertec controller -- I just don't know which. T

11 years, 3 months

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Accurite Technologies

by cctalk＠fahimi.net

I was wondering if anyone out there knew if these guys are still in business? I want to order something but before sharing my CC info I actually want to make sure there is someone on the other end of the line. I've tried emailing them and calling multiple times. Emails have gone unanswered and the number is never picked up. It goes to what seems to be a generic home answering machine. Thanks. -Ali

11 years, 3 months

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Dilog and Emulex boards

by useddec＠gmail.com

While looking for parts for a fellow list members project, I found these-again, and decided it was time they found a new home. I have more than one of a few. If interested please make an offer off list. $10 shipping for one or all within US. If you are outside the US, please send me your city, country and mail code. Thanks, Paul DILOG DQ130 DQ686 Emulex SC01 SC03 TU11 TU121 UC171 QD241

11 years, 3 months

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San Diego, CA: 1991 ERA AS400

by mstaunton＠roadrunner.com

Sorry got really sick. Below is the model numbers. I will supply more info if anybody is interested Pricing is open due to shipping weight is included CRT monitors working with cables HP A4033A 65lbs HP A45764 75lbs servers/workstations HP Visualize C180 30lbs HP Apollo 400 MOD#A2193A 90lbs Mentor Graphics HLN5065W 100lbs I clan also be contacted via cell 7607030986

11 years, 3 months

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2 big anniversaries are looming

by jfoust＠threedee.com

I was hoping for an Amiga event in the USA. Oh, there's this! http://amiga30.com/ at CHM, July 25. - John

11 years, 3 months

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Another question about core sense amplifiers

by rickb＠bensene.com

OK, while we're on the topic of core memory sense circuitry, in some of the old calculators that I've come across (a good example being the Casio AL-1000 -- http://oldcalculatormuseum.com/al1kck10l.html) ) there are transformers (pulse transformers) in the core memory sense circuitry. What purpose would these serve, and why are they used in some core memory applications, and not in others? In the case of the AL-1000, similar transformers are used in the X-Y drivers as well. Core memory sense amps and drivers are that mystical analog stuff that I don't understand very well :-) Can someone enlighten me about these transformers? Thanks, -Rick --- Rick Bensene The Old Calculator Museum http://oldcalculatormuseum.com

11 years, 3 months

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VAX-11/750 memory in 11/70 ?

by pontus＠update.uu.se

Hi all I was told that VAX-11/750 memory could also be used in an PDP-11/70 (or maybe some other model). Is this true? I have also read that there are three kinds of memory boards for the 11/750: M8728: 256k byte memory array; M8750: 1M byte memory array; M7199: 4M byte memory array. (As well as some third party boards. Which one of these, if any, could be used in an 11/70? Kind Regards, Pontus.

11 years, 3 months

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Question about core sense amplifiers

by v.slyngstad＠frontier.com

I've got a technical question about core memories. I've been looking, in particular, at the MC1540G sense amplifier. There's an external capacitor that is supposed to be connected between pins 1 and 10 (it looks like about .01uF was traditional). Maybe I'm being thick this week, but I don't quite get what this does for the circuit. It's part of the "DC restoration" section. I think I have some idea what amplification and slicing mean in this context, but "DC restoration" isn't firing any neurons. Can any of you that have studied how core works help me understand this? Thanks, Vince -- o< The ASCII Ribbon Campaign Against HTML Email!

11 years, 3 months

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Looking for PDP-11/03 front bezel (2U high)

by steven＠malikoff.com

Hi all, I'm looking for the front panel for a 19" 2RU (3-1/2") high four-slot PDP-11/03-KA, with a rectangular hole for the three switches. Looking at photos on the web, some appeared to have badges and some didn't, is that the case? I've not much to swap in my 'stash' except some old Terak Qbus cards and a hex-height Unibus M7234 timing board from an 11/40, of unknown working condition so I'm happy to Paypal if you had one. Thanks for any help - I recently joined this list and the posts I've seen so far are really interesting. Regards, Steve Malikoff.

11 years, 3 months

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Seeking HP1000/21MX TTY (12531B/C) board

by johannesthelen＠hotmail.com

I'm planning connect my HP1000 to ASR-33, so I could play with it for real...but only problem: I have no TTY board :( Anyone have spare for sell/exchange/donate? I might consider give up my Grumman HP1000 SCSI controller board in exchange... Also I'm interested other boards (X&Y and RS232), peripherals and etc. HP stuff... - Johannes ThelenFinland Before microcomputers blog (Finnish) http://ennenmikrotietokoneita.blogspot.fi/

11 years, 3 months

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Data General 800 or 1200 frame, power supply and front panel

by jws＠jwsss.com

I have a friend with a large number of pulls from DG 800's and 1200's and am sending out a general query to see who might have a chassis to serve as a system for testing and eventual build up of a system. We will be photographing / posting somewhere the boards, but he feels they are ffrom the Nova 800 or 1200 and not later. Thanks Jim

11 years, 3 months

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Sigma Electronics Systems Display Generator 5564

by ard＠p850ug1.demon.co.uk

Can anyone tell me anything about the subject: line? It seems to be a high-end graphics terminal from the mid 1970s. I have found the electronics unit while unpacking here, I think I have the keyboard (with a little built-in joystick?) somewhere too. I don't have the monitor, but I am guessing it's TV rates. Pysically it's just a metal box (about the size of a 4U rack unit without flanges). There is nothing on the front panel. The back panel has the on/off switch and connectors for a keyboard (DA15), 'Digital Video' (ditto), Host and Downstream RS232 ports (DB25, of course) Host and Dowstream current loop ports (DE9), 3 video outputs (BNC, I assume these can be used as R,G,B), mix video output (ditto) and video input (my guess is that the terminal video can be overlayed on some other video signal, again a BNC). The top cover comes off with 2 screws. It reveals very little apart from a massive linear PSU. The interesting stuff is exposed by removing the front panel (4 screws) which gives access to the card cage. There are 2 columns of half-width cards at the top, then about 7 full width ones. 2 of the half-width cards are wire-wrapped not PCBs. I forget what they do, one of them seems to be the video timing/sync counters. On other half-width cards are the processor (6800), ROMs (lots of EPROMs),Comms, video output (resistor DACs, etc) and a 'vector generator' which I guess is to draw lines, it's just a lot of of logic ICs, no microprocessor. One of the full-width cards is something like 'area fill'. So it does that in hardware too? The others -- and there are half a dozen of them -- are 'Pixel Store'. Each has 16K*16 of DRAM and a 16 bit ALU (4 off 74181). I hate to think how much this cost when new. RAM and ALUs were not cheap! -tony

11 years, 3 months

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PDP-11 with ATX power supply

by earl＠retrobits.com

Hello fellow DEC enthusiasts, I have a BA11-N mounting box with Q18 9-slot quad-height backplane. The power supply is toast. My goal is to hack it into something useful. I'd like to replace the power supply with a sufficiently-powered ATX PSU. I've read the instructions at: http://www.diane-neisius.de/pdp11/index_E.html#atx However, unlike the DEC PSU, the ATX power supply won't supply a 60 Hz line time clock (LTC) signal to the backplane via BEVENT. So, my question - has anyone used a standard ATX PSU for a PDP-11 QBUS system, and if so, how'd you work around the LTC issue? Once I solve the power issue, I have 11/23 CPU cards, RAM, and SLUs galore. I'm not planning to make this very power hungry though. Thanks! - Earl

11 years, 3 months

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Input text, output 300 bps?

by mikew＠thecomputervalet.com

I?m wondering if anyone has seen something like this: You input text. The program converts the text into what it would sound like if it were being transmitted at 300 baud which you can then save. Oh, I imagine that, say, I dunno, some kind of 300 baud modem could do this, but I don?t have such a beast. I wondered if someone may have created such an item as a programming exercise.? Cheers, m

11 years, 3 months

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Ceiling Apples

by terry＠webweavers.co.nz

An account of a small vintage computer rescue. Not uncommon machines but I'm glad I saved them from the scrapheap. http://www.classic-computers.org.nz/blog/2014-12-23-xmas-apple-salvage.htm

11 years, 3 months

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PDP 11/40 AC LO and M7235 (Status K5 Module)

by billdeg＠buzz1.com

> > > From: B Degnan > > > Yes, steady voltage > > I think Tony meant 'did you look at it with a 'scope'... :-) > > Noel I used two different scopes and a Fluke meter that can capture MIN/MAX. It's a nice steady flow as far as I can tell. The min/max is in the hundredths place, there is no major ripple. Bill

11 years, 3 months

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PDP 11/40 AC LO and M7235 (Status K5 Module)

by jnc＠mercury.lcs.mit.edu

> From: B Degnan > Yes, steady voltage I think Tony meant 'did you look at it with a 'scope'... :-) Noel

11 years, 3 months

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Math software - was Re: Rich kids are into COBOL

by Arno_1983＠gmx.de

On 06/03/15 9:40 AM, Mouse wrote: >>>> one other, which you may or may not classify as a ?language?, is >>>> Mathematica. >>> I don't know enough about it to offer an opinion [...] >> I've been using Mathematica for years. [...] I've also used MatLab >> which also falls somewhat into that category. MatLab is is really >> optimized around vectors and arrays. > > That might be more similar to APL, then. > > This has been rattling around in my mind for a little while now and I > think one reason I didn't think of things like Mathematica or Matlab is > that they're single-implementation. ... > > /~\ The ASCII Mouse > \ / Ribbon Campaign > X Against HTML mouse at rodents-montreal.org > / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B > As I haven't yet seen it mentioned in this discussion, I think I need to toss in Scilab (http://www.scilab.org/ , also on WP), which is a Matlab workalike that came out of a French mathematical research iInstitute (INRIA, Institute Institut national de recherche en informatique et en automatique). It is under a GPL compatible license (CeCILL) and should therefore also work for those of us for whom free beer isn't free enough :) I used it^w a tiny portion of it during my student thesis for predicting and comparing the EMI spectra of phase and burst fired power controllers under different load conditions and power settings. So Long, Arno

11 years, 3 months

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Rich kids are into COBOL

by shawn-gordon＠cox.net

This was a screen driver I'd written to do pseudo windowing on green screen terminals. I thought it would have made more sense and been cleaner in C, but it wasn't. On 2/17/2015 9:27 PM, Mouse wrote: >> I've rewritten cobol into C a few times when I was a big enthusiast >> of C and the C code was longer and harder to maintain. >> > That is no surprise to me. If you were to take code written in C and > translate it into COBOL, I'd generally expect the COBOL code to be > longer and harder to maintain, too. > > Indeed, I'd expect that for pretty much any pair of languages; > translating code out of the idiom it was written for generally makes it > larger and harder to understand. > > /~\ The ASCII Mouse > \ / Ribbon Campaign > X Against HTML mouse at rodents-montreal.org > / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B > >

11 years, 3 months

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PDP 11/40 AC LO and M7235 (Status K5 Module)

by billdeg＠buzz1.com

Working on PDP 11/40, issues with DC LO and AC LO The front panel confirms a DC LO issue, CONS and RUN lights are off, BUS and PROC lights are on. The panel is unresponsive. With the cable removed from the h742a connector, P9 says DC LO and AC LO are 3.53v, which is lower than the expected +4.8v. This tells me there is a fault in the h742a. I hate to remove the 742a power control board but I finally have the machine in my basement so I can work on it for an extended period. Voltages of the other regulators are OK. I think it's conclusive that the h742a has a fault to be repaired. Next, I re-connected the cable to P9. The DC LO and AC LO wires lead to J18, which feeds DC LO and AC LO to the backplane on my system. Reading >from J18 the DC LO value remains at 3.53v, but the AC LO drops further to 1.72v. I get similar readings from the backplane pins themselves. When I remove the Status Module card (M7235) from the backplane the AC LO on J18 jumps up to 3.53v - i.e. AC LO jumps back to origination levels. Question - Is there is *also* a potential fault in the M7235 circuit related to AC LO, -OR- is it normal for the M7235 to detect and pull down AC LO further forcing the system to halt? I am working to understand the circuits from page 120 of the KD11-A Maint manual http://bitsavers.trailing-edge.com/pdf/dec/pdp11/1140/KD11-A_Maint.pdf My plan is to repair the h742a first and see how it goes, but I'd like a 2nd opinion if anyone has one, regarding the M7235....thanks! photos http://vintagecomputer.net/browse_thread_record.cfm?id=178&tid=8 Bill

11 years, 3 months

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GNT-4601 punch cable help

by mloewen＠cpumagic.scol.pa.us

I have a box of old HP paper tapes to read, and am having an awful time trying to build the right serial cable to connect a GNT-4601 reader/punch to a Linux PC. Does anyone have a known good cable diagram and stty settings that will work? Thank. Mike Loewen mloewen at cpumagic.scol.pa.us Old Technology http://q7.neurotica.com/Oldtech/

11 years, 3 months

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PDP-11 with ATX power supply

by jnc＠mercury.lcs.mit.edu

> From: Earl Evans > I have a BA11-N mounting box with Q18 9-slot quad-height backplane. > The power supply is toast. Toast, how? Physically mangled, or just not working? If the latter, it might be possible to fix it. (Even if you're not up to that, don't pitch it - someone else might be interested in it as a repair item.) The other thing you could do is install a BA11-S power supply (H7861); some are available on eBay. They are compatible (physically/electrical interface), the H7861 just has a few more amps of +5V. Noel

11 years, 3 months

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DEC Legacy 2015, Windermere UK, April 11/12th is just around the corner!

by mark＠wickensonline.co.uk

Sincere Greetings This is a quick email to remind you that DEC Legacy 2015 <http://wickensonline.co.uk/declegacy/> is just around the corner! I've recently updated the web page with some exciting presentations and demonstrations <http://wickensonline.co.uk/declegacy/presentations>including the following topics: *VAX MP - Simulating a SMP VAX* *Mark Wickens, DEC Legacy Organiser* *Unearthing an important historical computer at the computer sheds museum* *Jim Austin, The Jim Austin Computer Collection* *Video Presentation* *Bernd 'vaxman' Ulmann* *An Update from the Living Computer Museum* *Rich Alderson, Senior System Engineer* *The MCPRINT Utility, 30 years in the making* *Malcolm Blunden, retired VMS Systems Manager* *The Future of VMS * *Sue Skonetski, VP of Customer Engagement, VMS Software* *Getting the DEC experience on modern hardware* *Peter Allan, ex VAX system manager and VMS programmer* *HECnet - A worldwide DECnet network* *Mark Wickens, DEC Legacy Organiser* ... and there will be more yet to come. We also now have quite an impressive list of exhibits <http://wickensonline.co.uk/declegacy/hardware> which I expect to continue to grow throughout the next month. Whatever your favourite era of DEC kit you are sure to find something of interest. The registration page <http://wickensonline.co.uk/declegacy/register> allows registration for a single day or the whole weekend. Please come, join in and experience the best computing equipment from the best manufacturer! Kind regards, Mark Wickens *Event Organiser* p.s. please forward this email to anyone else you think might be interested in attending!

11 years, 3 months

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2 big anniversaries are looming

by lproven＠gmail.com

Both for the Atari ST... http://mrchimps.lyfordrome.com/AtariStuff/Atari.html http://www.stuff.tv/features/hall-fame-atari-st-computer-kickstarted-home-r… ... and its greatest rival: http://amigaworld.net/modules/newbb/viewtopic.php?topic_id=39821&forum=25 http://fo.hn/amiga30/ -- Liam Proven ? Profile: http://lproven.livejournal.com/profile Email: lproven at cix.co.uk ? GMail/G+/Twitter/Flickr/Facebook: lproven MSN: lproven at hotmail.com ? Skype/AIM/Yahoo/LinkedIn: liamproven Cell/Mobiles: +44 7939-087884 (UK) ? +420 702 829 053 (?R)

11 years, 3 months

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Teleray Micricon 82306-3 on ebay

by Arno_1983＠gmx.de

Glen Slick <glen.slick at gmail.com> wrote: > What is an HP 82306C GPIO Interface? Is that the same as thing as an 82306A? > > http://www.hpmuseum.net/display_item.php?hw=1111 > http://www.ebay.com/itm/281557879632 Probably close but not identical. The datasheet (catalog page actually, http://www.premerec.com/pdf/hp11835a.pdf, English version on second page) for the 11835A Data Buffer I have explicitely calls for the C suffix card - but maybe just because it was the current variety at that time. I got the device from a surplus outfit figuring it might come in handy one day, say for demonstrating or debugging bit-serial circuitry, as it can spew out bits at an arbitrary rate between zero and about 4 MHz. It has two banks of 1024 Mbits data memory each that are alternately loaded from the computer and read for driving the serial output, plus some additional memory for configuring an internal state machine and driving auxiliary signals, originally intended for a frequency hopping synthesizer. Intended application for the device was mobile phone and related equipment development; my example came out of a Nokia R&D facility of in Oulu, Finland according to its inventory tag. Sean Caron <scaron at umich.edu> wrote: > Interesting... appears to be some kind of temperature controller... I found > a NASA technical report that mentions it and discusses some of the specs; > apparently it's based on the Signetics 2650A at 1.25 MHz and according to > the spec sheet, it's designed to use standard 4-20 mA interface to > instruments, etc. > > Maybe worth it if someone's looking to hunt down some 2650A CPUs and maybe > some support chips for a vintage SBC project. > > http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19870004136.pdf Thanks for the hints. File however doesn't load for me (from Germany). Might not even take ripping the device apart and rebuilding it into an SBC - I find the case, display and keyboard quite nice and would be looking to preserve as much as possible of that. The provided keyboard and display (that look as if they're seven-segment, but might even be alpha-numeric "star" type) could be be quite sufficient for many an application - mostly depending on how much RAM and ROM and which sorts of I/O there are in, can be crammed into or hung off that box - to realize a hex monitor or whatever floats your boat. So Long, Arno

11 years, 3 months

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VCF East shirt preview

by evan＠snarc.net

This year we decided to pay homage to the PDP-8 and Spock. :) http://snarc.net/vcfexshirtpreview.gif

11 years, 3 months

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General Electric TermiNet 340 printer doc?

by henk.gooijen＠hotmail.com

I picked up a really heavy line printer last week. It is a General Electric TermiNet 340. My searches for doc were not very successful. It seems to be a line printer that prints 340 lines of 132 characters per minute! At the rear side near to the floor is a large rectangular connector. Lucky me, the previous owner had a connection cable. It is a ribbon cable. At one side is the mating rectangular plug, at the other side is an IDC header. Is it possible that this printer is also sold by others using a different name? So far I have not been able to find any documentation. I'd love to get this beast operational! Thanks for pointers, - Henk

11 years, 3 months

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Patching vs. new code (was Re: Pascal not considered harmful)

by isking＠uw.edu

On Fri, Feb 20, 2015 at 7:22 AM, Shiresoft <ggs at shiresoft.com> wrote: > > > > On Feb 19, 2015, at 11:35 PM, Chuck Guzis <cclist at sydex.com> wrote: > > > >> On 02/19/2015 08:23 PM, Guy Sotomayor wrote: > >> > >> Nope. It was (and still is) how I write code (sit down and compose at > >> the keyboard). One of my old bosses at IBM once said "Yea, Guy just > >> waves his hands over the keyboard and programs come out". > > > > That would have been impossible in my case, unless I had the most > prodigious eidetic memory in history. > > > > Writing code almost always involved using an on-disk or -tape source > code library. Even if it was new code, there were significant advantages > to creating a library then modifying it as one progressed. > > > > One would typically work with a bound listing or listings and work out > the control system directives to update the existing code base. Remember, > this was in the day of batch processing with almost no access to > terminals. Everything happened on the keypunch. > > > > So for one to remember all of the correction set IDs and sequence > numbers for a group of programs or system programs would be more than > impressive--it'd probably merit a vivisection. > > ;-) > > I never said that I didn't / don't use references while I write code. > It's just that I don't write my code down first. Of course most of what I > do is new (from scratch) rather than modifying existing code. > > When I first started at IBM because build time for our software was about > a week, we'd fix bugs and such with patches. Folks in the lab would stop > looking up the instruction encodings and would just ask me...I could do the > assembly in my head...I'm sorely out of practice now. :-/ > > > My first (paid) programming job was in 6800 assembler, using the Motorola EXORCISER system. It took hours (as in a major part of a day, longer than the work day) to reassemble the entire code base, so we would patch the program in the PROM programmer. We would, of course, back port the changes in symbolic assembler to the source, and every few days just take the downtime hit to rebuild the code base. Keep in mind that this was natively hosted on a 6800 system. Another interesting tidbit: its simple filesystem did not segment files and reuse blocks, so you had to purge old versions of files, preferably before a dozen or so files were lined up after it. In that case, it would tie up the system for way too long while an old file was purged and all the new files were packed into the recovered space, block by block. It was barely a step above magtape. One other note: there was a bug in certain mask sets that required a NOP before you could set the interrupt mask. Since the ENTIRE memory/IO space was 64k bytes, every byte was sacred, every byte was great, and if a byte was wasted?. -- Ian S. King, MSIS, MSCS Ph.D. Candidate The Information School University of Washington There is an old Vulcan saying: "Only Nixon could go to China."

11 years, 3 months

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Teleray Micricon 82306-3 on ebay

by Arno_1983＠gmx.de

Hello everybody, stumbled across this while looking for a HP 82306C GPIO Card to go with my 11835 data buffer (hint hint). Looks just old and arcane enough that it might be of some interest to the community here ;) http://www.ebay.com/itm/251594970760 (no ending date given, BIN/OBO) Micricon 823 Chassis Microprocessor 82306-3 Teleray NASA Research Lot of Two No association whatsoever to the seller, not interested in bidding on the item (TWO units) myself. Then again, if somebody decides to go for it and wants to split up (provided this can be made into two reasonably complete units), we can talk. I'm in Europe but can effect PayPal payments and CONUS -> EUR shipping with some (reasonable) effort. So Long, Arno

11 years, 3 months

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Rich kids are into COBOL

by kspt.tor＠gmail.com

On 4 March 2015 at 18:56, Todd Goodman <tsg at bonedaddy.net> wrote: > * Guy Sotomayor <ggs at shiresoft.com> [150304 12:45]: >>[...] I had several cases where one program needed a >> specific version of a system library, another program needed a >> *different* specific version of the library and the rest of the system >> wanting yet a 3rd version of the same library. >> >> TTFN - Guy >> > > After running into that particular package hell early on in my Linux > experience, I switched to Gentoo linux where multiple versions of > libraries can be installed at the same time and used by whatever > software needs them. > > Todd As can Debian, so I'm a bit surprised. It's straight forward on *nix-like systems to have multiple run-time versions of a library. It's designed for it. The problem is when you need different *compile time* (aka development) versions of a library, then you'll need to have different name spaces. The remaining issue may be that the distro may not provide different versions of all the libraries you need out of the box. Then there will be additional work. And that may or may not be more effort than it's worth, granted. -Tor

11 years, 3 months

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Lear Siegler ADM-5 service manual

by martin＠shackspace.de

Hi! Anyone owning the service manual for an ADM-5? Seems like this terminal is not as common as the ADM-3(A). Couldn't find it on bitsavers or anywhere else :( --map -- Martin Peters martin.peters at news.uni-stuttgart.de

11 years, 3 months

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WTB or trade: RA60 parts

by useddec＠gmail.com

If you have any RA60 parts or drives you are parting out, please contact me off list. Thanks, Paul

11 years, 3 months

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Tektronix 1240/41 diagnostic lead sets - resend

by jnc＠mercury.lcs.mit.edu

For the benefit of those (like me) who read CCTalk via the Web archive, and thus missed this as it came in during the period when the server thought it was 1970 (and it thus went into the March 1970 archive... :-), a re-send: -------- Hello all, I'm setting up to make one of these (part # 012-0556-00) for my own use, and can easily make more if anyone needs any (although I will need to order some of the parts needed, if so). So if anyone needs one, and would like me to produce one for them, please let me know (ASAP, so I can order the parts). I imagine the cost will be on the order of $10-$15. Note that i) you have to have a P6460 probe/pod to use them (the TTL P6462 probe/pod will _not_ work), and ii) full automatic testing on a 1240D2 18 channel Data Aquisition Card requires a pair of diagnostic leads (which is why I'm making one - I found one on eBay, but only one). Noel

11 years, 3 months

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Looking for manuals for a Gridpad 1910

by bob099＠centurytel.net

I have a working 1910, everything seems to be working. Except the memory cards, not sure if they are bad or I don't know how to check them. On screen keyboard is working as good or bad as expected, battery is dead but looks easily rebuildable. Most of DOS seems to be missing, can it be replaced with Free Dos or another version? -- But if any provide not for his own, and specially for those of his own house, he hath denied the faith, and is worse than an infidel I Timothy 5:8

11 years, 3 months

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Anyone have a M8340 (EAE) schematic rev.D? Or M8341 rev.D sch?

by steve＠tronola.com

Hi Folks, We're trying to get an EAE (extended arithmetic element) board set working in a PDP-8/e. It turns out that DEC made changes which render M8340 rev.D incompatible with M8341 rev.D. (Both of the boards we have are rev.D, sigh.) M8340 rev.D requires at least an M8341 rev.E. We would like to modify the boards to be compatible but the only schematic of M8340 that we've been able to find is rev.F. So it's difficult to figure out what changes are needed. If anyone has an M8340 schematic earlier than rev.F or an M8341 rev.D sch, that would be a huge help. The goal is to get Spacewar! working on the PDP-8/e for the upcoming VCFSE show. This version of Spacewar! requires the EAE. We GOTTA get Spacewar! working for the PDP-8's 50th! :) Please help. Thanks, Steve PS: The revision letter can be found in the lower right-hand corner of the DEC schematics that I have.

11 years, 3 months

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New C-64C cases...

by geneb＠deltasoft.com

Check this out: https://www.kickstarter.com/projects/1670214687/original-commodore-64c-comp… It's very tempting. :) g. -- Proud owner of F-15C 80-0007 http://www.f15sim.com - The only one of its kind. http://www.diy-cockpits.org/coll - Go Collimated or Go Home. Some people collect things for a hobby. Geeks collect hobbies. ScarletDME - The red hot Data Management Environment A Multi-Value database for the masses, not the classes. http://scarlet.deltasoft.com - Get it _today_!

11 years, 3 months

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New C-64C cases...

by ethan.dicks＠gmail.com

On Wed, Mar 4, 2015 at 4:13 PM, Jim Brain <brain at jbrain.com> wrote: > On March 4, 2015 at 3:49 PM Ethan Dicks <ethan.dicks at gmail.com> wrote: > I would *definitely* have pounced on clear. > > The kickstarter is funded, and the note he sent out said he would consider > more colors when the initial color stock is sold (500 of red/white/blue. > Most people seem to be focusing on clear and charcoal grey/black, so I would > expect those will be the next options. I did see that after I read the comments. Very cool. Clear and Black are definitely two good choices. -ethan

11 years, 3 months

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New C-64C cases...

by dmackey1＠twcny.rr.com

I'm in for one of each.? Sent on a Virgin Mobile Samsung Galaxy S? III <div>-------- Original message --------</div><div>From: geneb <geneb at deltasoft.com> </div><div>Date:03/04/2015 9:37 AM (GMT-05:00) </div><div>To: cctalk at classiccmp.org </div><div>Subject: New C-64C cases... </div><div> </div>Check this out: https://www.kickstarter.com/projects/1670214687/original-commodore-64c-comp… It's very tempting. :) g. -- Proud owner of F-15C 80-0007 http://www.f15sim.com - The only one of its kind. http://www.diy-cockpits.org/coll - Go Collimated or Go Home. Some people collect things for a hobby. Geeks collect hobbies. ScarletDME - The red hot Data Management Environment A Multi-Value database for the masses, not the classes. http://scarlet.deltasoft.com - Get it _today_!

11 years, 3 months

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