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

Photo Sharing (Was RE: DEC BA11-K KY11-L mounting brackets -- how?)

by dave.g4ugm＠gmail.com

> Wow, sorry about that... Do folks here have an alternative service they > like/recommend for sharing linked photos to the list? > They work fine for me in the "New" Edge, Chrome and Firefox. Noel, do you have the updated Chromium based Edge or "Legacy" edge ? Not sure why they don't work for Noel in edge. If anyone still has the old now called "Legacy" Microsoft Edge note it is no longer supported or updated and its probably time to ditch it ... https://www.theverge.com/2021/3/9/22321779/microsoft-edge-legacy-spartan-bro wser-support-ended In my experience some one has issues with every photo sharing site I have used. > cheers, > --FritzM. > > Dave

4 years, 7 months

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DEC BA11-K KY11-L mounting brackets -- how?

by jnc＠mercury.lcs.mit.edu

> From: From: Fritz Mueller > two solutions come to mind -- the one you mention here with nut and > washer, or inserting a hex-head machine screw in the other direction. > Either the nut or the hex-head screw could then be secured with a small > combination wrench. Well, if you put the bolt in first (which you'd kind of have to do, if going >from front to back, with the adapter already mounted to the KY11-L), you'd have to hold it in place while you offer the KY11-L up to the BA11-K. Which was why I was originally thinking, put the bolt in in the other direction, which you can do after you put the KY11-L+adapter in place. But that brings up another idea: put the bolt in place (on the adapter), use a first (thin) nut (with washer, if necessary) to hold it in place, then bolt the adapter to the KY11-L bezel, then mount the whole works up to the BA11-K. Not sure which would work better. I'd probably go with the 'pointing forward' bolt, and use a lock-washer (or one of those nuts with integral lock-washer), and then you can mostly tighten with a Phillips driver from the rear. But the extra washer might be easier to put together (if it doesn't push the KY11-L bezel too far forward). Noel

4 years, 7 months

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Might be the wrong forum to ask

by van.snyder＠sbcglobal.net

I have some old stuff, that's not really computer stuff, so this might be the wrong forum to ask. But it might be the right people. 1. Sears Model 564.21600300 monaural portable tape cassette player, with external mic and switch. It works, but it needs a new spindle belt. Tape plays, but only the capstan advances it, so it gets tangled up inside the box. I found a 5v power cube that works with it, even though it says it wants 6v. 2. Sony SVR-2000 Tivo DVR. It appears to work, but I don't have the remote, so it doesn't do anything other than cycle through its warnings about not having been connected to the telephone and made the monthly call to collect the fee. 3. Tivo Series 2 DT Digital Video Recorder, model TCD649080. Says "Welcome! Powering Up..." but I waited for half an hour and it didn't do anything else. It was connected to my network (the lights on the RJ- 45 socket were blinking) but my router couldn't see it. I have the remote for this. Any of these are yours for the price of shipping -- or local pickup in 91214. Van Snyder van.snyder at sbcglobal.net

4 years, 7 months

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DEC BA11-K KY11-L mounting brackets -- how?

by jnc＠mercury.lcs.mit.edu

>> From: Fritz Mueller >> my brackets just have a punched oval hole at the bottom, and not a >> "tapped hole" per your description above. > The adapters on mine look _almost_ identical to yours, but _definitly_ > have a #8 press fit threaded bushing at the bottom. Now that I've thought about it for a bit, I wonder if you can use a nut-and-washer in place of the press fit threaded bushing at the bottom (but otherwise all the hardware,and insertion directions, will be the same); it will be kind of difficult to get the nut in there with the KY11-L pressed up to the front of the BA11-K (which is probably why they went to the press fit threaded bushing) - maybe hold it with a pair of needle-nose? Noel PS: Thanks for the URL for the knob; I'm going to order a couple of spares (the DEC originals have a tendency to break).

4 years, 7 months

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DEC BA11-K KY11-L mounting brackets -- how?

by jnc＠mercury.lcs.mit.edu

> From: Fritz Mueller > Pictures of my brackets should be viewable at > https://photos.app.goo.gl/wni3mDAQHozK9Ho27 I couldn't get them to display on my modern Window laptop, using either the Edge or Explorer browsers. I had to get my wife to show them to me on her Apple laptop. Not a great site to use for photos. > The interesting/confusing bit for me is the bottom part... In the > second picture you can see that my brackets just have a punched oval > hole at the bottom, and not a "tapped hole" per your description above. Odd. The adapters on mine look _almost_ identical to yours, but _definitly_ have a #8 press fit threaded bushing at the bottom. Then there are a pair of holes in the folded-over bit, and a pair of machine screws go through superimposed holes in the flat part, and into tapped holes in the KY11-L bezel, which hold the adapter to the bezel. The 1" long #8 machine screw then holds the adapter to the tabs in the BA11-K. To do the other mounting hardware, in Henk's picture, there's a flat metal plate, with i) a hole in each end, and ii) a threaded hole in the middle. Two machine screws (#8, I thihk) hold the flat plate to the bezel, then another screw (#10, maybe) holds that U-shaped piece in Henk's picture to the flat piece, and then a pair of #10 screws hold that to the tabs in the BA11-K. (All machine screws above face forward.) >> I'm too burned out (COVID long haul) at the moment > Something a lot of us are going to have to face in the upcoming > months/years, it seems -- wishing you best! Hey, it could be worse! :-) Has the classic computers commuinity lost anyone to COVID? I know we've lost a few in the last year, but I don't recall if any were COVID. Noel

4 years, 7 months

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FTAG: 42U Rack Cabinet, flat packed for collection [London, UK]

by ullbeking＠andrewnesbit.org

Hello all! I am starting a new job next week and returning to a field where my roots are (multimedia engineering, signal processing, etc). Therefore I am vacating my studio workshop and ending a few projects I was working on until recently. I have a lot of industrial and enterprise server hardware to sell or give away FTAG (free to a good home). FTAG: Toten GS Cabinet, 42u, 1000 mm Deep, 800mm Wide, 3 Fixed Shelfs + 2 Fan Units + Cable Management 800mm wide which is easier to work with than a 600mm. However being 1000mm deep it does it mean you can add 670mm servers. It's a relatively large cabinet so you can fit pretty much most rack-mountable servers. It is packaged as a flat-packaged self-assemble rack cabinet in five large, flat-packaged, boxes. I will of course help move them from my office to your van (I recommend collection with a van or courier with van). This item is among the first things I'm giving away because I need to free up some room. This will make it easier to catalog and sell/give away. I will be advertising other items too in the next few days. Post code: N15 4QL (Seven Sisters and Tottenham Hale) Any recommendations for other mailing lists or web forums to advertize this offer are welcome too. Thank you all!! Kind regards, Andrew

4 years, 7 months

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RSX11D disks on EBAY- anyone interested?

by lee.gleason＠comcast.net

On 3/3/21 11:11 AM, Al Kossow via cctalk wrote: >>/On 3/3/21 10:42 AM, Lee Gleason via cctalk wrote: />>//>>>/?? The auction starts at? more than I have in my computer budget this month />>/I went ahead and bought these, but paypal contributions to my email would be helpful />>/this is way more than I can afford as well. / >He listed a 11D utilities source disk over the weekend, so that is on its way now too. >I asked and he says he doesn't have any more 'red labeled' DEC disk packs. Did you notice this auction? Looks like not all of his RSX11D stuff is red labelled. This one looks like it might hold a running system. https://www.ebay.com/itm/PDP-11-RK05-RSX-11D-64K-DEC-Digital-PDP/3534108081… -- Lee K. Gleason N5ZMR Control-G Consultants lee.gleason at comcast.net

4 years, 7 months

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DEC BA11-K KY11-L mounting brackets -- how?

by fritzm＠fritzm.org

Hi all, I'm reassembling an PDP-11/34 in a BA11-K chassis right now, and am a little puzzled by the front mounting brackets (the ones that hold a KY11-L of either sort on the bottom, and a half trim-panel on the top). In particular, on the bottom half, the available place for screws to go to attach the bracket to the chassis is nearly completely blinded by an overhanging tab. The engineering drawings I've seen are unfortunately not very clear on this... Anybody have an 11/34 in a BA11-K and care to take a peek and tell me how the hardware here is properly configured? (Hex head instead of DEC's ubiquitous Phillips truss, to allow tightening from the side? Machine screw from back, and a nut on the front? Other?) cheers, --FritzM.

4 years, 7 months

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DEC BA11-K KY11-L mounting brackets -- how?

by jnc＠mercury.lcs.mit.edu

> From: Fritz Mueller > I'm reassembling an PDP-11/34 in a BA11-K chassis right now, and am a > little puzzled by the front mounting brackets (the ones that hold a > KY11-L of either sort on the bottom, and a half trim-panel on the top). > In particular, on the bottom half, the available place for screws to go > to attach the bracket to the chassis is nearly completely blinded by an > overhanging tab. > .. > Anybody have an 11/34 in a BA11-K and care to take a peek and tell me > how the hardware here is properly configured? Well, I have an KY11-LA mounted on a BA11-K; the KY11-LA and -LB use the same bezel, and should have identical hardware. There's an intermediate 10" or so high adapter piece (one either side, of course) mounted to the KY11-L. (That's attached to the KY11-L with short machine screws which are inserted from the rear, and go into tapped holes in the KY11-L bezel.) That piece attaches to the BA11-K with different hardware at the top and bottom: on the bottom, a single 1" or so machine screw (#8, I think) goes through the vertical tab on the side at the front of the BA11, to a tapped hole in the adapter piece. At the top, a pair of short countersunk machine screws (#10, I think - definitely larger than the 1" machine screw at the bottom) attach a pair (one each side) of those black plastic mounting widgets which have a pair of balls on stalks; those go into holes on the back of the blank panels, and those screw also hold the adapter piece to the BA11-L at the top. (I looked for the DEC formal name for those pieces, but couldn't find it.) > I'll get some pictures of the brackets I have, too -- maybe they aren't > the standard/correct ones for an 11/34... I'll take a look. I'm too burned out (COVID long haul) at the moment to take pictures or do a drawing right at the moment; if needed, I can do it tomorrow (or so). Noel PS: A while back you were after measurements on the KY11-L power knob; did you ever get those: If not, I've got one, and can measure it.

4 years, 8 months

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eBay sellers

by jnc＠mercury.lcs.mit.edu

> From: William Donzelli > Sellers of collectibles and antiques get bombarded with nitpicks and > corrections. Often these are right, but often they are wrong. Yeah, that's why I didn't just assert 'this is wrong, X is right', but I gave them the things to look at so they could verify for themselves that my claim was correct. > Passing a URL through the Ebay system is trickly, to say the least > ... "Check this document 123-456-78 in bitsavers, page 26". Yeah, I didn't try and pass a URL, too hard; (and in any case, a tricky con artist could point to a fake document they had posted). I guess I should have said 'Check the PC05 manual, look on BiSavers in dec/foo/bar to find it, pg. xyz'. > From: Bill Degnan > I went to this guys place and saw the tape reader first hand. Its in > better condition than mine. Oh, I didn't have a problem with the condition; just that it was incorrectly labelled. > From: Jay West > I would think the thing that would make it stand out and make him > change it - tell him a PC05 doesn't connect to a PDP8, it goes with > something completely different (a PDP11 ofc, correct?). Yes, the PC05 is for the PDP-11 (and others): https://gunkies.org/wiki/PC04/PC05_High-Speed_Paper-Tape_Reader/Punch Yes, what I _should_ have done is say 'the PC05 is for the PDP-11; the PC04 (which this is) won't work on a PDP-11. If a PDP-11 owner buys this for his PDP-11, he'll probably by unhappy'. Noel

4 years, 8 months

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Anyone know ancient versions of XLC?

by david4602＠gmail.com

On 4/9/21 3:23 PM, Nemo Nusquam wrote: > On 2021-04-08 00:32, Ben Huntsman via cctalk wrote: >> I know this is a strange place to ask, but it's as good a place as any. >> Anyone on here used IBM's XLC in very old versions? >> >> Anyone know what the argument -qdebug=austlib does? > > I have the docs for IBM C Set++ 3.1 for AIX (1993) and it is not there.? > As you probably know, the Austin lab was known for HPC s/w so they may > have shipped special debug versions. [..] I used xlc in the early 90's at IBM in the Raleigh networking lab, along with the excellent xcdb debugger - Austin's debug libs weren't a part of our repertoire. There was plenty going on that was deeper and closer to the iron in Austin, so it could be just about anything. AIX 3.2.5 was so much leaner and meaner than 4.x that came along next... I never did warm up to it the same way. - David

4 years, 8 months

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Wanted: DEC H960 cabinet, or similar rack of same size and vintage.

by mosst＠SDF.ORG

Hi All, I'm looking for a H960 to put my 8/e in, either to buy or to trade for something. (PDP-8/11/VAX/Alpha gear, KIM-1??) I'm in South-West England and am happy to collect from mainland UK. I may also be willing to have it shipped internationally. Regards, -Tom

4 years, 8 months

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DEC H8575-A DB25 to MMJ

by idinc＠swcp.com

hello all i am looking to purchase qty 2 DEC H8575-A DB25 to MMJ adapters. anybody have some that they can sell? also need a couple of mmj to mmj cables, 10' or longer would work. thanks tim timothy rutherford teor at nmia.com 505-550-5110

4 years, 8 months

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XXDP on a really small system?

by bob＠jfcl.com

I have an 11/03 (unmapped, of course) with 28kW memory and two DLV11s. I'm trying to build an XXDP image on TU58 that I can boot on this system, using an XXDP 2.5 RL02 image and simh. My simh configuration is - CPU 11/03, NOEIS, NOFIS, BEVENT disabled, autoconfiguration enabled, idle disabled . TTI address=17777560-17777563, vector=60, BR4 TTO address=17777564-17777567, vector=64, BR4 TDC controllers=1, address=17776500-17776507, vector=300*, BR4, 2 units . RL RLV12, address=17774400-17774411, vector=160, BR5, 4 units I can boot from the RL02 OK - MEMORY MANAGEMENT UNIT NOT FOUND BOOTING UP XXDP-SM SMALL MONITOR XXDP-SM SMALL MONITOR - XXDP V2.4 REVISION: D0 BOOTED FROM DL0 28KW OF MEMORY NON-UNIBUS SYSTEM RESTART ADDRESS: 152010 TYPE "H" FOR HELP But running UPDAT to create a new system image on the TU58 dies .R UPDAT UPDAT .BIC HALT instruction, PC: 000010 (000012) If I change the CPU to an 11/23 (but keep the same memory and other configuration) then UPDAT works. Is there some issue or limitation in running XXDP on a 11/03? Is it just UPDAT that doesn't work, or are there bigger problems? Thanks Bob

4 years, 8 months

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eBay sellers

by jnc＠mercury.lcs.mit.edu

I'm slightly amazed at how some eBay sellers react. Take this item: https://www.ebay.com/itm/154404969351 which the seller had listed as a 'PDP-8 PC05'. I sent the person a message pointing out that it was a PC04 (as shown by the 4 rocker switches, and the small backplane - PC05's have a larger one to hold more cards). They sent a nice peply, but didn't alter their listing! Well, I hope the bider really is a PDP-8 owner who wants a PC04... :-) Noel

4 years, 8 months

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Looking for video (or photos) depicting how to remove ASR 33 printer from keyboard

by billdegnan＠gmail.com

I am looking for a video or photos that show how one removes the printer >from the keyboard safely on an ASR 33. I need to get to the underside of the printer levers so I can re-align them. I am getting incorrect characters when I type over half of the keys. I can see that a few levers are out of whack or not seated correctly but I believe to get to them properly I need to put the printer on its side or under a lift to get to the underside. I am nervous about detaching the "H" shaped gizmo that connects the keyboard to the printer. Thanks Bill

4 years, 8 months

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Anyone know ancient versions of XLC?

by david4602＠gmail.com

On 4/12/21 1:00 PM, Liam Proven <lproven at gmail.com> wrote: >> AIX 3.2.5 was so much leaner and meaner than 4.x that came along next... >> I never did warm up to it the same way. > > Twas ever thus, no? A universal truth. > I remember an ad campaign for AIX when it was quite new... "We took > UNIX and added millions of lines of code to it." (Or words to that > effect.) To me and to a lot of other people, this did not sound like a > good thing... The ad campaign I remember was "A disciplined merge of System V and BSD" This looks relevant, from 1989: https://technologists.com/sauer/Convergence_of_AIX_and_4.3BSD.pdf

4 years, 8 months

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VCF Midwest 16 Date Announcement

by silent700＠gmail.com

Hello computer friends - all of us down in VCF Midwest Planning Bunker have decided: VCFMW16 planning must commence! To not do so would surely set up for failure, if and when conditions continue their current upward trend and we get the OK to gather again in unlimited numbers. So...we're going to have a show! Our schedule this year will be the same weekend as in 2019, with the dates this year falling on the 11th and 12th of September. Same location as well, at Waterford Banquets (and Clarion Inn), Elmhurst, Illinois. See our full announcement here: http://vcfmw.org/announce. And fill out the linked survey if you'd like. Still much to do - room block reservation, improved table layout planning, speaker recruitment....and that dang T-shirt. We hope everyone who is able to travel in September will consider paying us a visit. More news to come - check our newly re-themed website for updates as they occur! http://vcfmw.org -jt

4 years, 8 months

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OT: Newsreader for Windows

by robert.jarratt＠ntlworld.com

I am hesitant to post this because I don't want to start a massive debate, but what Newsreader programs do people use on Windows? I don't want to use Google Groups because it wants me to sign in to Google. I am generally reluctant to use a browser based reader because it will want to track me. So I am after an installable client. Thanks Rob

4 years, 8 months

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Mitsubishi Melcard (edge connect type)

by organlists1＠sonic.net

Does anyone recall what kind of hardware/software was used to read/write the early Mitsubishi Melcard EPROM cards with the PCB edge connector contacts? It was explained to me by someone that a EPROM programmer could be used, however I've never seen a socket which fits the edge card connector of these cards. I've uploaded an image of the edge contact end of this type of card here: http://www.hammondorganservice.com/downloads/images/melcard.jpg Seems these were also available in the SRAM variety as well. Thanks Don Resor

4 years, 8 months

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Anyone know ancient versions of XLC?

by ben＠huntsmans.net

I know this is a strange place to ask, but it's as good a place as any. Anyone on here used IBM's XLC in very old versions? Anyone know what the argument -qdebug=austlib does? I can't seem to find any documentation that says... It would have been an argument for the compiler shipping with AIX 3.2.5, I believe. Thanks in advance!

4 years, 8 months

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RSX11D disks on EBAY- anyone interested?

by jnc＠mercury.lcs.mit.edu

> From: Jerry Weiss > I always wondered why the RKV11-D was only 16 bit addressable. The manual (EK-RKV11-OP-001) says: "Since the 11/03 BUS structure has no provision for extended addressing, no connection is made to the bus from these [XM] bits on the RKVII-D." (pg. 3-5). > The DEC RK05 disk subsystem cost $10K list circa 1978 (drive, RKV-11D > controller and cabinet), so this wasn't a trivial purchase. Interesting. Where did you see that listed, just out of curiosity? (I looked in the Jan '84 PDP-11 Systems and Options, my copy of which just showed up,but that's too late; I could probably find it if I pawed through all my DEC sales literature, but I'm too lazy... :-). Noel

4 years, 8 months

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Lisa Source Code

by rshepprd＠gmail.com

I believe the original Amiga file system also used a linked-list approach. That way you could, theoretically, reconstruct a file from any one of it?s data blocks. Richard Sent from Mail for Windows 10

4 years, 8 months

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Apollo Date Bug

by knowak＠alumni.calpoly.edu

Hi All, Back after a long time away from this list... I happen to have a small herd of Apollo DN3500/4500 boxen which i pulled out the other day to see if they still run. Sure enough they still boot up (one has a flaky PS but i have a few spares). Anyway, the last time i fired one of them up (runs SR 10.4.1) was around 2015 and it still was able to deal with the current date back then. This last time the other day I did an EX CALENDAR to reset the date to the current date and it defaulted to some date in 2015 again and i wasn't even able to log on using my known login. I figured it was due to the well known date bug so i reset the date back to 2013 (of course it warned me about possible duplicate file IDs, etc) but I was able to log in again. My question, has there been any progress in fixing the date bug by anyone (who still has some of these machines) (I'm thinking guys like R. Stricklin..). Or is this pretty much a dead end? I know HP put out a "patch" which according to Jim Rees's page was never really an effective patch to begin with...Any insight would be appreciated. -Kurt

4 years, 8 months

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Lisa Source Code

by cclist＠sydex.com

On 4/8/21 8:40 AM, Eric Smith wrote: > On Thu, Apr 8, 2021, 09:34 Chuck Guzis <cclist at sydex.com > <mailto:cclist at sydex.com>> wrote: > > There's a big difference--in a WORM, unwritten sectors *mean* something. > > > For archival purposes, in what way does an unwritten sector on a WORM > mean more than an unwritten sector (with no data field present) of a > floppy? Neither can be accurately archived without representing the fact > that it is unwritten. Simple--a WORM contains the entire history of information on the disc; nothing is ever lost. A floppy can have data overwritten--and probably does (e.g. directories and allocation maps) The only way to update a WORM is to add to it. --Chuck

4 years, 8 months

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DEC H8575-A DB25 to MMJ

by kiwi_jonathan＠yahoo.com

?Google?Shopping?shows?the?PA2067?MMJ?die?available?at?3?online?stores.?Digi-Key?lists?it?too. What?are?the?pros?and?cons?of?the?die?and?a?PA8000?CrimpALL,?versus?the?IEC…'t?have?any?crimping?tool?at?all?

4 years, 8 months

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RSX11D disks on EBAY- anyone interested?

by jnc＠mercury.lcs.mit.edu

> From: Ethan Dicks > One of these? > .. > Looks neat. Wow; that's pretty impressive! Not only will it talk to an RK05, it also works with drives from Ampex, Control Data, Diable, Pertec, etc, etc. I didn't realize they were all similar enough (in terms to the controller interface) to be interchanged like that. For the RK05, it must have used a flat cable from the Berg header on the card to a custom dual card that plugged into the mini-backplane in the RK05 (similar to the RKV11-D). > From: Chris Zach > I have wondered if the Plessy can do 22 bit DMA Depends on whether or not it's program compatible with the RK11. That's because on almost alll UNIBUS controllers, DEC was in the habit of putting the A16/A17 bits of the buffer address in the CSR (usually in the 060 bits). So they could only handle 18-bit DMA addresses. Early QBUS contollers just copied that, so that they were then 100% software compatible. That's why the RLV11 and RLV12 differ a bit: the RLV11 is 18-bit address only; to add 22-bit capability to the RLV12, they had to add an extra register (the RLBAE). (Interestingly, the Dilog card above claims to the RKV11 compatible; but also says it has "memory addressing capability" to 256KB. They can't both be true, though; although the RKV11-D has the A16/A18 bits in the CSR, they aren't connected to anything! See EK-RKV11-OP-001, pg. 3-5.) Noel

4 years, 8 months

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DZ11 H317-E EIA distribution panel on eBay

by jnc＠mercury.lcs.mit.edu

This item: https://www.ebay.com/itm/383837694443 (described as just an "EIA distribution panel" in the listing) turns out to be a DZ11 distribution panel, if anyone needs/wants one. The price is vaguely reasonable, but maybe the seller would accept a lower offer. Noel

4 years, 8 months

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RSX11D disks on EBAY- anyone interested?

by jnc＠mercury.lcs.mit.edu

> From: Al Kossow > I have to find my qbus rk11 card. The RKV11-D is a set of 4 quad cards (3 of them the same as the RK11-D) and a custom 4-slot backplane (different from the RK11-D's), along with another dual QBUS card, connected via flat cables. It was apparently usually supplied by DEC in a mounting box of its own. Noel

4 years, 8 months

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RSX11D disks on EBAY- anyone interested?

by jnc＠mercury.lcs.mit.edu

> From: Al Kossow > it's a single-card controller made by Xylogics. Ah; never heard of that. If you don't mind indulging my curiousity, how did it connect to the drive (if it used RK05's, and not a Diablo, or something)? Normal flat cables to a dual card (like the RKV11-D), or a connector on the back edge (like a UNIVERTER; so it could use a BC11A cable)? Noel

4 years, 8 months

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Lecture: Get to know the PDP-8 through emulation, 2021-04-10, 19:00

by stueberahoo＠yahoo.de

Hi all, you're invited to the Update computer club[0] public lecture series "Updateringar"[1]! Update is a Swedish computer club founded in 1983 whose members tinker with all kinds of computers, from Raspberry Pi to PDP-12. The club has a big collection of historic computers. In this lecture series we'll talk about everything related to computers: Historic and modern computers, operating systems, programming, hardware projects, creating art with computers, building a computer museum, and more. We'll start with a classic: the PDP-8. When: 2021-04-10, 19:00 CEST Where: https://bbb.cryptoparty.se/b/upd-0mo-m2u-aq8 Get to know the PDP-8 through emulation An emulator is a program that pretends to be a computer different from the one the emulator is executing on. This allows execution of software intended for a physical computer that you do not have. In this talk Pontus will explain the basics by implementing a fully working PDP-8 emulator and explaining each instruction and feature along the way. The end result is a working emulator in less than 1000 lines of C code. And hopefully you will walk away with both an understanding of the classic PDP-8 computer and emulation. Pontus Pihlgren (Update) The lecture is free and open to everyone. Upcoming: 2021-05-08, 19:00: Forth on microcontrollers. Crest (CCCHB) Hope to see you there, Anke [0] http://www.update.uu.se/index_eng.html [1] https://www.update.uu.se/wiki/doku.php/projekt:updateringar

4 years, 8 months

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Not sure if I posted this, but the Saturn Calc and WP disks

by cz＠alembic.crystel.com

Are up on https://www.crystel.com/pdp For RT11/TSX, let me know if they work. CZ

4 years, 8 months

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Looking to buy any of the IR. INTERNATIONAL RECTIFIER KITS WITH SOLAR RADIOS OR SOLAR RADIO EXIMERMENTS FOR SMECC MUSEUM'S SOLAR ELECTRONICS DISPLAY. -- ALSO INTERESTED BY SOME BY OTHER MAKERS TOO ...EMAIL US OFF LIST PLEASE

by couryhouse＠aol.com

Looking to buy any of the IR. INTERNATIONAL RECTIFIER KITS WITH SOLAR RADIOS OR SOLAR RADIO EXIMERMENTS? FOR SMECC MUSEUM'S SOLAR ELECTRONICS DISPLAY.? -- ALSO INTERESTED? BY SOME BY OTHER MAKERS TOO ...EMAIL US OFF LIST PLEASE

4 years, 8 months

4
4
0 0

Looking to buy any of the IR. INTERNATIONAL RECTIFIER KITS WITH SOLAR RADIOS OR SOLAR RADIO EXIMERMENTS FOR SMECC MUSEUM'S SOLAR ELECTRONICS DISPLAY. -- ALSO INTERESTED BY SOME BY OTHER MAKERS TOO ...EMAIL US OFF LIST PLEASE

by couryhouse＠aol.com

Sad but true it all looks the same to me most times . In my life time I have typed far more upper case material than upoer...lower stuff.. In usaf the typewriters? we used to send massive? Mars radio messages between name. And families.... had no lower case Them the years of teletypes,and upoer case computer terminals. .. it's been a hard life... alas On Sunday, April 4, 2021 Tony Aiuto via cctalk <tony.aiuto at gmail.com; cctalk at classiccmp.org> wrote: On Sun, Apr 4, 2021 at 9:44 PM Adrian Stoness <tdk.knight at gmail.com> wrote: > im pritty sure? he uses his teletype to send us emails > LOL.? No excuse.? I like old hardware, but that doesn't mean I use it for real work. My hand cranked drills are to show my grandchildren. My 18V battery drive is what I actually use. > > On Sun, Apr 4, 2021 at 8:17 PM Tony Aiuto via cctalk < > cctalk at classiccmp.org> wrote: > >> Ed. When you type in all caps it looks like you've been owned. Can you >> tone >> it down so we know it is real mail. >> >> On Sun, Apr 4, 2021 at 6:54 PM ED SHARPE via cctalk < >> cctalk at classiccmp.org> >> wrote: >> >> > >> > >> > >> > Looking to buy any of the IR. INTERNATIONAL RECTIFIER KITS WITH SOLAR >> > RADIOS OR SOLAR RADIO EXIMERMENTS? FOR SMECC MUSEUM'S SOLAR ELECTRONICS >> > DISPLAY.? -- ALSO INTERESTED? BY SOME BY OTHER MAKERS TOO ...EMAIL US >> OFF >> > LIST PLEASE >> > >> >

4 years, 8 months

3
2
0 0

Looking to buy any of the IR. INTERNATIONAL RECTIFIER KITS WITH SOLAR RADIOS OR SOLAR RADIO EXIMERMENTS FOR SMECC MUSEUM'S SOLAR ELECTRONICS DISPLAY. -- ALSO INTERESTED BY SOME BY OTHER MAKERS TOO ...EMAIL US OFF LIST PLEASE

by couryhouse＠aol.com

Exactly spend years with those too... I am old On Sunday, April 4, 2021 Chuck Guzis via cctalk <cclist at sydex.com; cctalk at classiccmp.org> wrote: On 4/4/21 8:28 PM, ED SHARPE via cctalk wrote: > > Sad but true it all looks the same to me most times . In my life time I have typed far more upper case material than upoer...lower stuff.. > In usaf the typewriters? we used to send massive? Mars radio messages between name. And families.... had no lower case > > Them the years of teletypes,and upoer case computer terminals. .. it's been a hard life... alas > What's wrong with upper case?? Do you know of any keypunches with lower case? --Chuck

4 years, 8 months

1
0
0 0

SOT: Scanning old computer docs

by guykd＠optusnet.com.au

At 12:19 AM 3/04/2021 -0600, you wrote: >On 4/2/21 10:27 PM, Guy Dunphy via cctalk wrote: >> There are defects in your 'good' flatbed image too - for eg the >> bleed-through of the orange lettering on the other side of the >> sheet. The way to correct that is to use a black, highly light >> absorbent backing sheet. Eg black velvet. > >Hum. > >Why do so many scanners come with glossy white (usually on foam) backing >to hold the image down? > >I'm questioning why they do that, not your recommendation. I think it is a combination of habit, and marketting/customer expectations. People intuitively expect the white backing, and for many scanning tasks it is preferable. Yet for scanning anything printed on both sides of thin paper, it's a real problem. I have a sheet of matt black plastic, and some black velvet cloth for this. The plastic is easier to use, but the velvet works better for really thin paper with a lot of visual bleed through. The more light absorbent the better. If I ever find a sheet of 'vanta black' (new light absorbent substance, very close to 100%, look it up) I'll be using that. That's not the only 'strange & unfortunate lack' in typical scanners. Another is that the raised plastic bezel goes all the way round the glass, rather than having at least one of the glass long sides be flat right to the edge, with the scanner sensor also going very close to the edge. This is needed for scanning sheets larger than the bed, and also very essential for scanning pages of books that are too thick to allow getting any page flat on the typical scanner bed. There are special 'edge scanners' that allow this - draping the book over the side of the scanner, so one page can be fully flat on the glass. They cost _much_ more than normal scanners. And yet the actual construction has very little that would cost more to manufacture. Construction is just arranged a little differently. The higher cost is another case of 'marketting.' Guy

4 years, 8 months

1
0
0 0

IBM cpu tear down

by kl＠2k.ca

https://www.righto.com/2021/03/logic-chip-teardown-from-vintage-ibm.html Enjoy.

4 years, 8 months

5
4
0 0

Video presentations on 2 interesting OSes for vintage kit

by lproven＠gmail.com

Minerva and SMSQ/E, both related to Sinclair QDOS, the original OS for the Sinclair QL. https://youtu.be/yU0ptNyNqcI And EmuTOS, a FOSS recreation of Atari TOS & GEM, which reached v1.0 about 6 months ago. https://youtu.be/eqrM4TE5jTM I knew about the 1st 2, but this video taught me a lot. It's an insular community and most materials are aimed at people who already know about it. I wrote a blog post to explain a bit of the history and context: https://liam-on-linux.livejournal.com/78738.html Found via the m68k.info community: https://m68k.info/#sinclairql:video:SMSQE:mar2021 Which in turn I found when I asked if there were any 16-bit homebrew computers out there and learned of the Kiwi 68K: https://www.ist-schlau.de/ -- Liam Proven ? Profile: https://about.me/liamproven Email: lproven at cix.co.uk ? gMail/gTalk/gHangouts: lproven at gmail.com Twitter/Facebook/LinkedIn/Flickr: lproven ? Skype: liamproven UK: +44 7939-087884 ? ?R (+ WhatsApp/Telegram/Signal): +420 702 829 053

4 years, 8 months

1
0
0 0

SOT: Scanning old computer docs

by trash80＠internode.on.net

If there is anyone on the list familiar with scanners I'd be most grateful for some advice please. Some time ago I bought a HP 8270 sheet feed (full duplex) scanner NOS. I wanted to digitise a whole heap of old computer documentation and for a little while I've been working through the big heap of stuff. But for quite some time I've had an issue with scans that go through the sheet feeder (irrespective of whether I do them double sided or not). Basically the problem is that anything that goes via the sheet feeder has issues with "streaks" in the document whereas anything done on the flat bed is perfect (I have some links to some examples below). By way of clarity, anything done on the flatbed the lamp traverses the flat bed to do the scan. For sheet fed items the lamp is moved to specific slot on the scanner and the sheet feeder takes over wrapping the document past the lamp. Given that flat bed scans are OK I don't think its an issue with the lamp. I've done the following things to try to resolve the issue with no joy: * Checked for any specific settings * Tried doing scans in grayscale * Tried increasing the resolution (default is 300dpi) to slow the speed that the document is fed through the feeder. According to HP the issue is a cleanliness one i.e. dirt on the glass can cause reflections. I've followed their instructions for cleaning the glass but still no joy. Flatbed example. https://drive.google.com/file/d/1jYiFzERiZiaq7-WoTiQ2eIzITn6giviR/view?usp=s haring Sheet feed example. https://drive.google.com/file/d/1WF4SHbwV3bVET_bzwIUiULywbCGZBf_V/view?usp=s haring Thank you!!! Kevin Parker

4 years, 8 months

6
6
0 0

Any Interpress fans out there?

by paul＠mcjones.org

> On Apr 1, 2021, at 10:00 AM,Al Kossow <aek at bitsavers.org <mailto:aek at bitsavers.org>> wrote: > > > Interpress had nothing to do with the Alto > > Talk to Paul McJones re. Interpress translation I included Press-to-{PostScript,PDF} conversion in the program that generated http://xeroxalto.computerhistory.org, but I don?t have any code for Interpress.

4 years, 8 months

1
0
0 0

Any Interpress fans out there?

by jnc＠mercury.lcs.mit.edu

> From: Al Kossow > Dover was not an Interpress printer Yeah, it used Press format. BTW, here: http://ana-3.lcs.mit.edu/~jnc/tech/unix/s2/press.c is the program from our V6 Unix machine to produce PRESS format files for the MIT Dover. (.v was the format for the Varian printer, a poor man's XGP, but which had finer resolution; our copy of troff had been hacked to produce .v format output.) Noel

4 years, 8 months

1
0
0 0

Any Interpress fans out there?

by tony.aiuto＠gmail.com

I'm in the middle of imaging a set of 5 1/4" diskettes from 1988 containing the Interpress conformance test suite. My plan is to - convert the MS-DOS backup format images to files (trivial) - find interpress to postscript converter to print the files. - compare them to the reference pictures to verify I got them all. The third part is the hard one. I believe there was a document to go along with the images, so you could verify they printed as expected. I don't think I have that any more. I'm looking for pointers to an online copy. My search has come up empty. Of course, the alternative is if someone has an interpress printer. We could just print them. Perhaps Curious Marc has one alongside the Alto?

4 years, 8 months

3
5
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DEC pin

by kylevowen＠gmail.com

Does anyone have a picture of the "I've been VAXinated" pin? I know I've seen this pin before, probably at some VCF event. Thanks, Kyle

4 years, 8 months

6
6
0 0

DEC RX50 disks with mystery content

by david4602＠gmail.com

Hello, DEC enthusiasts - I've got some 5-1/4" disks here that purport to be from a DECmate (probably II) and may have data offloaded from a bigger system. But the disks don't have any recognizable trace of a filesystem on them; just vast swathes of data that looks like this: https://drive.google.com/file/d/12EO4Lg1Uh7NvCUJksHQ2AUiK550OX7UJ/view?usp=… It seems to be a pattern of a near-zero byte followed by some other byte. It's like they're storing 12-bit words in 16 bits or something. Does anyone recognize this sort of thing, just eyeballing it? - David

4 years, 8 months

2
1
0 0

head alignment tape

by jos.dreesen＠bluewin.ch

Does this head alignment tape need saving ? https://www.tutti.ch/de/vi/zuerich/computer-zubehoer/komponenten-zubehoer/5… I'd be inclined to think that the alignment tape would suffer to same issues as all old tapes, but then this is rare enough to be mentioned here. Jos

4 years, 8 months

8
9
0 0

Pro350/"XT" pre-release documents

by mark＠matlockfamily.com

> Date: Mon, 29 Mar 2021 21:27:58 -0400 > From: Chris Zach <cz at alembic.crystel.com> > To: dstalk at execulink.com, "General Discussion: On-Topic and Off-Topic > Posts" <cctalk at classiccmp.org> > Subject: Re: Pro350/"XT" pre-release documents > Message-ID: <9f8a2890-d268-bb19-1989-e26364c9c7a8 at alembic.crystel.com> > Content-Type: text/plain; charset=utf-8; format=flowed > > Well, what I have is this: > > SPSS/Pro introductory guide > (2) SPSS/Pro for DEC professional/350 > SPSS-X User's guide, third edition (Think telephone book) > 4 disks VOL NAME SPSSPRO1 (to 4) > > > Hey, in one of the manuals there is an additional disk SPSS/Pro > DEMONSTRATION > > I guess I can copy them on my Pro/380 to other disks, but does anyone > have a better way to make a spare copy? They are almost 40 years old at > this point... > > Interesting stuff. > > C Chris, There was also a SPSS-11 for RSX and your SPSS for Pro/350 would likely be a later version. A few years ago I bought the SPSS-11 manual from an Ebay seller. It looks like SPSS-11 ran a lot like the IBM OS/360 version in that it was feed a file of input and it produced a file of output (like a batch job). The Pro 350 version was likely a bit more interactive and I would be very interested in getting a copy of it. As far as the best way to get a copy made, it would be great to read them on a M+ system that has TCP/IP or is at least connected to HECnet so the disk images could be uploaded somewhere. Also, the manuals would be of interest as well. The SPSS-11 manual I have is a relatively thin paperback book. Thanks, Mark

4 years, 8 months

3
2
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TSX

by cz＠alembic.crystel.com

Also came across a TSX Plus reference guide and install guide, from 1985. These two fill a very large binder, have they already been scanned? If not I'll burn out my scanner doing these. If so I can pulp or Ebay them. C

4 years, 8 months

4
3
0 0

Pro350/"XT" pre-release documents

by cz＠alembic.crystel.com

Hi! Given that other people seem interested in the Pro/350 series systems I thought I would dig out and scan some of the remaining manuals I have. These seem to have come from an agreement with SPSS back in 1982 or so and all appear to be draft documents. I'll upload them as I scan them (takes time) to https://www.crystel.com/pdp I'll upload a PDF file along with a zip file of the scans at 300dpi. Question: Would the SPSS manuals be interesting? Also I have an RSX11M 3.2 manual set in a big binder, worth scanning or is that up there already? I'm assuming the Fortran manuals have already been scanned in the past. Final thought: Looks like I have the spss/x floppies for the Pro version 1.0, are those out there somewhere already? Thanks! Chris

4 years, 8 months

3
5
0 0

XXDP diagnostic sources

by bob＠jfcl.com

Hopefully this is an easy question - are the sources for the XXDP diagnostics online anywhere? I particularly looking for NKXA, the Falcon-11/KXT11/DCT11 one. Thanks, Bob

4 years, 8 months

3
2
0 0

DEC h8575-A Yours for Postage

by rlloken＠telus.net

Ladies and Gentlemen, I was sifting through a huge box of industrial junk in my basement and found two NIB DEC H8575-A DB25 to MMJ adaptors in their original bags with a 1991 date code. The DB25 is female and the MMJ is, of course, a jack. Does anybody want them for postage from Athabasca, Alberta? -- Richard Loken VE6BSV : "...underneath those tuques we wear, Athabasca, Alberta Canada : our heads are naked!" ** rlloken at telus.net ** : - Arthur Black

4 years, 8 months

1
1
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punching paper tape

by fedorkow＠mit.edu

? Al K has read hundreds of these Whirlwind tapes using a standard 8-track optical reader, so I think we can confirm that it is punched with the common geometry, except one track narrower, with four bits on one side of the sprocket holes, and three bits on the other. ? The tapes are for pedagogical purpose, so if I can punch on inch-wide tape and perhaps trim the width later, that works just fine. Thanks all! ?/guy Date: Fri, 26 Mar 2021 16:01:38 -0700 From: Al Kossow <aek at bitsavers.org> To: cctalk at classiccmp.org Subject: Re: punching paper tape Message-ID: <f52af974-dbc4-0a51-409e-b4cc2b9076e9 at bitsavers.org> Content-Type: text/plain; charset=utf-8; format=flowed On 3/26/21 2:58 PM, Steve Malikoff via cctalk wrote: > OK thanks for that. I just had a browse and read that "Whirlwind used > the same paper tape format that was popular with Teletype machines" so > I gather it's nothing special after all. the best picture i have at hand of what a ww tape looks like is on the right of http://bitsavers.org/bits/MIT/whirlwind/X4222.2008_Whirlwind_ptp/pictures/s… you can see it is narrower by one punch than a normal 8-channel tape

4 years, 8 months

1
0
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Hard To Believe This Person Is Serious

by robert.jarratt＠ntlworld.com

https://www.ebay.co.uk/itm/313467585213

4 years, 8 months

23
39
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punching paper tape

by fedorkow＠mit.edu

Is there someone in North America that might be willing and able to help out a small historical display project by punching a few short paper tapes? I'm glad to try to accommodate whatever coding requirements are easiest. Thanks! /guy fedorkow fedorkow at mit.edu

4 years, 8 months

10
19
0 0

Logic Analyser Usage Advice

by robert.jarratt＠ntlworld.com

I have an old HP 1630G logic analyser. I am trying to use it to debug a problem with an 82C206 peripheral controller (or rather I think damage between the CPU and the peripheral controller). I am not very experienced with logic analysers and I wonder if I am using it correctly. What I am trying to do is see which internal registers are being read/written and the values. To do this there are two signals (XIOR and XIOW) that trigger the read/write on their rising edge. So I have connected the XIOR and XIOW signals to the J and K clock inputs and set the LA to clock on the rising edge. I have then told the LA to trigger on a particular address range (in the State Trace screen if anyone is familiar with this LA). When I run the analyser it complains of a slow clock. This makes sense, because I am using the read/write signals to drive the clock inputs so that I only capture actual reads and writes to the peripheral controller. However, I don't seem to be getting sensible values in the trace and I am wondering if the LA is really not capturing anything because of the slow clock? I don't think it makes sense to clock the LA on the actual clock signal because I won't be able to capture the address and data values on the rising edge of the read/write signals and I would end up with traces full of useless data. Am I doing it right, or is there a technique that I am missing here? Thanks Rob

4 years, 8 months

3
3
0 0

MaxSpeed VGA MaxStation

by commodorejohn＠gmail.com

So, some months ago, I was in an electronics surplus store and picked up what was obviously an X terminal - tiny metal slab with a VGA connector, serial & parallel, AT keyboard, and RJ45 "communication" port. I got it bare, without the external PSU that would've gone with it, and I've since been unable to determine just what the heck I'm supposed to feed this thing. It's a standard barrel jack, but there's no markings on the case or the PCB to give any clue as to what voltage/amperage or polarity it expects, and Google has been no help at all. Does anyone have any recollection of these things? Any idea what they want for juice? To throw an extra mysterious wrinkle into this, when I popped open the case to get a look at the PCB, I found that, apart from the CPU, DART, and ROM, the only non-glue ICs on the board were an 8K SRAM and a W82C476 RAMDAC - but 8K isn't even remotely enough for a VGA screen, not even a monochrome one at VGA resolution! Am I missing something on how these things operated? Given this, my only guess would be some kind of insane networked-framebuffer scheme where the host would blast video data in on the fly, but there's no way this was even 100Mbps Ethernet, and 10Mbps isn't nearly fast enough to transfer 150KB at 60FPS, and there's no memory to buffer it for a slower refresh. What in the heck is going on here?

4 years, 8 months

4
7
0 0

seeking docs for Monlithic Systems 303-0158 unibus memory

by fritzm＠fritzm.org

Subject line says it all -- I'm working on a restoration that includes one of these, and it looks as if it needs some troubleshooting/repair. I didn't see docs posted at Bitsavers. Anybody have a manual squirreled away? cheers, --FritzM.

4 years, 8 months

1
0
0 0

DEC CTI Bus Technical Manual, or looking for Ken Wellsch or Megan Gentry

by bdweb＠mindspring.com

Hello All, Does anyone have a copy of the DEC CTI Bus Technical Manual (EK-00CTI-TM-002) I can scan? If not, does anyone have an email address for Ken Wellsch or Megan Gentry as they both appear to be authorities on the CTI bus (see https://en.wikiversity.org/wiki/DEC_Professional_(computer)/Archive question 10)? Thanks in advance! --Bjoren Davis

4 years, 8 months

2
1
0 0

VCF Swap Meet in Wall, NJ

by jeffrey＠vcfed.org

Announcing our second Annual Vintage Computer Federation Swap Meet! Last year's Swap Meet was very successful so ... we are doing it again! *DATE*: April 24, 2021 (RAIN DATE: April 25, 2021) *TIME*: 8AM to 2PM *ADDRESS*: Parking Lot on Monmouth Boulevard, Wall, NJ Across from Infoage Museum and Brookdale College *GPS location*: https://goo.gl/maps/m1AAS4UUziGXnoPeA (40.1848793,-74.0630848) *WEBSITE*: http://vcfed.org/wp/vcf-swap-meet *EMAIL*: swapmeet at vcfed.org *PHONE*: 732-722-5015 Free to buyers. Vendor cost is per space. First space is $20, each additional space is $10. You can park in your space and sell out of your vehicle. *SEND PAYMENT TO*: paypal at vcfed.org (FRIENDS AND FAMILY OPTION) Write in the note section: [your name] VCF Swap Meet 4/24/2021 Number of spaces: *SWAP MEET SIGNUP*: https://forms.gle/kNCL8WVxTQcnw5nA6 * Reservation doesn't guarantee sales. * The Vintage Computer Federation is only providing a space, vendors must bring their own tables, tents, cars. * In case of inclement weather, money paid will be refunded. * All items that you bring must be taken with you. No items are to be left behind. * Port-o-potty on site. Jeff Brace ========================================= Vice President & Board Member Vintage Computer Festival East Show-runner Vintage Computer Federation is a 501c3 charity http://www.vcfed.org/

4 years, 8 months

9
17
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BS was Re: VCF Swap Meet in Wall, NJ (Liam Proven)

by marvin＠west.net

What a bunch of ^%#%#@$^. FYI, this is a listserver designed for classic computer discussions. Please save your diatribes for a more appropriate venue!!! Marvin > Look, TBH, sorry to be That Guy, but what it sounds like is made-up > mumbo-jumbo with as much basis in science as saying his choler is too > low and phlegm and bile out of equilibrium. > > It's an anti-masker trying to justify killing other people. It's no > more valid than a gun nut shouting about the constitution when they've > never been near a "well-organized militia" in their life. > > Keep well away from any people like this in real life. Do not come > into physical contact with them, ever, anywhere. > > -- > Liam Proven ? Profile: https://about.me/liamproven

4 years, 8 months

1
0
0 0

Any info on a Western Peripherals DC-230 disk controller?

by derschjo＠gmail.com

Any ideas what this disc controller is? https://www.ebay.com/itm/PDP-11-Backplane-Western-Peripherals-DC-230-Disk-C… Can't find much about this on the 'net, other than that it was a controller for Diablo/Pertec style drives -- no idea if it's an RK11 clone or something else entirely. Looks to be suitable for a PDP-11/20 given the little notch missing from the side there, and the lack of a separate power harness for the backplane. - Josh

4 years, 8 months

6
6
0 0

ODE 2.1.1 documentation

by ben＠huntsmans.net

Hello! Does anyone have any old documentation for ODE 2.1.1, or relatively close versions? I know "newer" versions have been released and have documentation available, but there are some changes in some of the config files that are very different from older versions. For example when creating a sandbox, in the sandbox directory there is a subdirectory called rc_files, that is supposed to have two files, "local" and "shared", but they don't work the same way that rc_files/Buildconf and Buildconf.exp work in newer versions... Anyone on here know anything about ODE, or any other sources of information? Many thanks!

4 years, 8 months

2
3
0 0

VAX rom patches - VAXstation 2000 SCSI boot, KA420 > 1GB boot

by abs＠absd.org

I had some extra A4 pages with a VAXstation 2000 manual which covered a preview PK2K kit for VMS, bootloader and ROM to allow use of the VAXstation 2000 SCSI controller for more than just tapes. Rough scan at http://sync.absd.org/vax/VAX-PK2K-preview-kit.pdf (the originals will be sent to someone who can do a better job) The pages led me to http://ftp.gwdg.de/pub/vms/ which includes some goodies: - http://ftp.gwdg.de/pub/vms/pk2k - uVAX-2k SCSI patches with source for boot roms, VMB & VMS - http://ftp.gwdg.de/pub/vms/ka420 - ROM patches for KA420/KA430 boot >from >1GB disks - http://ftp.gwdg.de/pub/vms/dk-552/ - VMS 5.2 patch to allow to accept more SCSI disk devices (Starting a new thread in case there is (slightly) more general interest for anyone interested in using the onboard uVAX-2K SCSI controller more more than tapes (OK, OK, for anyone not running NetBSD on their uVAX-2K interested in etc etc) - have cross posted to cctalk & port-vax - hopefully not violating any conventions there) David

4 years, 8 months

2
1
0 0

VAXstation 2000 network & hardware guides (English & German)

by abs＠absd.org

I have acquired a tiny slice of Orange Wall, and wondered if anyone would be interested - preference for anyone who is setup to scan and upload the missing bits to bitsavers or similar :) These seem to already be generally available online EK-NETAB-UG-002 Workstations and MicroVAX 2000 Network Guide EK-VAXAB-OM-002 VAXstation 2000 Owner's Manual (Covers how to replace your mouse balls, and details exciting options such as LN03, LN03 PLUS, LPS40, LA210, LA100, LA75, LA50. LGC01, LVP16, DF224, DF124, DF112, VSXXX-AB :-p) These I cannot immediately find EK-NETAA-UG-001 VAXstation 2000, MicroVAX 2000 and VAXmate Network Guide EK-VAXAB-IN-002 VAXstation 2000 Hardware Installation Guide Likewise these German versions EK-NETGA-UG-001 VAXstation 2000, MicroVAX 2000 und VAXmate Netzwerk-Anleitung EK-A0305-IN 001 VR160 Installations-und Bedienungsanleitung EK-A0355-OG-001 Grafikkoprozessor (8 Bildebenen) fur die VAXstation 2000 Installations- und Bedienungsanleitung Thanks David

4 years, 8 months

4
5
0 0

TC08 DECtape bootloader question

by kylevowen＠gmail.com

My understanding of the OS/8 TC08 bootloader (MI8-EC) is as follows: 0. Rewind tape 1. Set current address (07755) to 07600 2. Set word count (07754) to -0200 3. Read block 0 and wait for flag 4. Continue executing at 07600 However, it appears as though word count will be hit by the loading of the first block. In fact, my instrumented version of SimH says it's overwritten with a zero. If that's the case, it would seem as though the word count overflow flag will never get set. Not to mention, the current address will be updated next, causing data to be redirected to yet another position. But according to SimH, a write to the current address, 07755, never happens. How can this be? Any help would be appreciated! Kyle

4 years, 8 months

4
9
0 0

DECtape ancestry (Kyle Owen)

by michael.99.thompson＠gmail.com

> > Date: Sat, 20 Mar 2021 16:21:44 -0400 > From: Kyle Owen <kylevowen at gmail.com> > Subject: Re: DECtape ancestry > > What systems took advantage of the bidirectional nature? > > Kyle > ADSS on the PDP-9 does an interleave of 6 when reading/writing to the DECtape. If it runs off the end it reverses direction and keeps going. I have seen some library files take three passes of the DECtape to fully search. -- Michael Thompson

4 years, 8 months

2
1
0 0

DECtape ancestry

by paulkoning＠comcast.net

I just read part of the Grant Saviers interview from CHM, where near the end he gives a bit of history of DECtape. In particular, the fact that it was derived from LINCtape though the format details are quite different. A question popped into my mind, prompted by having read Guy Fedorkow's paper about Whirlwind just a few days earlier: the Whirlwind tape format has 6 physical tracks but 3 logical tracks (each logical track is recorded redundantly on two physical tracks) and one of those tracks is a clock track. LINCtape and DECtape have the same redundant recording scheme, and also have a clock track; the difference is that they add a mark track to enable the recording of block numbers and in-place block writing. That made me wonder if LINCtape was, in part, inspired by the Whirlwind tape system, or if those analogies are just a concidence. Incidentally, it's probably not widely known that LINCtape/DECtape is not the only tape system with random block write capability. Another one that does this is the Electrologica X1 tape system, which uses 1/2 inch 10 track tapes, which include a clock and a mark track. An interesting wrinkle is that the X1 tape system lets you chose the block size when formatting the tape, and then data block writes allow for the writing of any block size up to the formatted block size. I'm not sure when that device was introduced; the documentation I have is from 1964. There's no sign the designers knew of DECtape (or vice versa). paul

4 years, 9 months

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the question

by sieler＠allegro.com

Hi, I just wanted to thank Tony for asking the question (disability vs. masks) and particularly wanted to thank Robert for the kindness of answering it! I learned something today! Stan

4 years, 9 months

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Oregon Pascal for M68000

by classiccmp＠philpem.me.uk

Hi all, Does anyone have any documentation (or perhaps even a copy?) of Oregon Pascal for the Motorola 68000? I'm looking for information on its calling convention, if such is available -- or otherwise a way to run it with arbitrary code and see how it behaves. Once again I'm reverse-engineering a 68K-based embedded system... :) Cheers Phil.

4 years, 9 months

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FS: Panavise vise with circuit board adapter!

by mechanic_2＠charter.net

Hello all, As you all know by now I probably have cancer and I am selling off my possessions to finance my travels around the country. I have for sale one Panavise vise with nylon jaws and a large circuit board holder adapter. $100 plus shipping. Please reply off list. I live in Reedsburg, WI 53959. I prefer Paypal F&F. If you use G&S please add the 4.5% handling fee. Will accept MO, Cashiers Check, and Personal Check (must clear before shipping)! GOD Bless and Thanks, rich!

4 years, 9 months

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[HOswap on IO] FS: Panavise vise with circuit board adapter!

by mechanic_2＠charter.net

Hello all, The Panavise is sold. I appreciate the interest! GOD Bless and Thanks, rich! On 3/18/2021 3:41 PM, Richard R. Pope wrote: > Hello all, > As you all know by now I probably have cancer and I am selling off > my possessions to finance my travels around the country. I have for > sale one Panavise vise with nylon jaws and a large circuit board > holder adapter. $100 plus shipping. Please reply off list. I live in > Reedsburg, WI 53959. I prefer Paypal F&F. If you use G&S please add > the 4.5% handling fee. Will accept MO, Cashiers Check, and Personal > Check (must clear before shipping)! > GOD Bless and Thanks, > rich! > > > -=-=-=-=-=-=-=-=-=-=-=- > Groups.io Links: You receive all messages sent to this group. > View/Reply Online (#47099): https://groups.io/g/HOswap/message/47099 > Mute This Topic: https://groups.io/mt/81439849/89555 > -=-=- > Help spread the word about HOswap! Tell your friends and groups about > how great this group is. https://groups.io/g/HOswap > -=-=- > Group Owner: HOswap+owner at groups.io > Unsubscribe: https://groups.io/g/HOswap/unsub [mechanic_2 at charter.net] > -=-=-=-=-=-=-=-=-=-=-=- > >

4 years, 9 months

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name/model of HP portable printer? (not HP 2225x) circa 1993

by sieler＠allegro.com

Hi, Does anyone remember the product name or number of the tiny HP portable printer (*not* an HP 2225 of any kind!) that probably came out about the same time as the HP Omnibook 300 (1993)? (My google-fu failed me.) IIRC, it was able to print on regular paper 8.5" wide, probably using a thinkjet mechanism. Battery powered, probably black, probably HP-IL interface. I remember coveting one when I got my first Omnibook, but by that time they were off the market and the only one I ever saw wasn't for sale (I did borrow it for a few days, it worked well). The use of standard (in the U.S.) paper, plus the tiny size, had be interested in it. thanks, Stan

4 years, 9 months

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who collects modems?

by rsmilward＠frontier.com

If anyone has a modem made by Datec, a long-defunct manufacturer from Chapel Hill, NC, please let me know. I used to do customer support for them back in the early '80s. (They used to run ads in Byte Magazine touting their "crystal-controlled stability".) Thanks. **Richard

4 years, 9 months

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PDP-10 I/O notes

by dstalk＠execulink.com

For what it's worth I've posted some notes on PDP-10 I/O from a course taught by Mike Bennett at UWO in the early 1970s. The monitor at the time was likely prior to 5.06. See: http://www.execulink.com/~dstalk/pdp-10_io.pdf Don

4 years, 9 months

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who collects modems?

by boris＠summitclinic.com

Have a bunch of modems as well but first have to get PDP-11 stuff shipped off to those people who want it. Will see if Value Village in Kamloops will still take them. For a while they were a great place to get old electronics like the DAT SCSI drive I picked up for $5 8 years ago. "high speed" at 50 Kb/sec transfer rate which seemed fast in 2010 when I picked it up and got all my DAT backup tapes transferred to "disks" which can only run under BasiliskII now. >Clearing out stuff at my space, I have the following modems: > >NEC UltraLite-Series Image Modem Plus w/box >CTS Datacomm 2424 ADA modem w/box >Scout Plus External Data/Fax modem w/box >Digital DF03 modem > >Any offers? > >--tom

4 years, 9 months

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Looking for Overland TC-50M 8-bit ISA Controller drivers&software

by bvasea＠gmail.com

I have this controller, I bought it from the Netherlands three years ago with a Cipher horizontal tape drive. It was pulled from a working system but... no drivers. Does anyone have any related software for this controller? It is listed here: http://www.vcfed.org/forum/showthread.php?66915-Overland-Data-TC-50M-Pertec… I tried everything from Bitsavers. All drivers, all software. Nothing works. The board is not listed so I installed and tried everything. To give something in exchange, I wish to contribute with the full Qualstar Tapestar for Dos package to bitsavers and archive.org (separate thread).

4 years, 9 months

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Tapestar for DOS

by bvasea＠gmail.com

Hello I have the Qualstar Tapestar Package for DOS. It is fully working. However it requires a Microtech MCS1 "TAPE816" 16-bit ISA Pertec controller. I have the full Ms-Dos package. Where do I send the software package to be uploaded to bitsavers?

4 years, 9 months

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80286 Protected Mode Test

by jnc＠mercury.lcs.mit.edu

> From: Guy Sotomayor > the LOADALL instructions including all of it's warts (and its inability > to switch back from protected mode) Good to have that confirmed (for the 286; apparently it works in the 386). > the other way to get back to real mode from protected mode is via a > triple-fault. Any insight into why IBM didn't use that, but went with the (allegedly slow) keyboard hack? Noel

4 years, 9 months

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Wagner WAC40

by Rice43＠btinternet.com

Hi, I recently bought a core rope memory unit from a Wagner WAC40, mainly because it?s very aesthetically pleasing and looks good on display: https://i.redd.it/h9sb550uhnm61.jpg However, i can fine very little about Wagner Computer, the WAC40 (and WAC12), or the man behind the company, G?nter Wagner. Does anyone have any info on any of these subjects? This links seems to be all i can find: https://blog.hnf.de/gauner-gelder-und-computer/ Thanks, Josh Rice

4 years, 9 months

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Diversified Technology CAT904 80286 single board PC

by new_castle_j＠yahoo.com

I've got a Diversified Tech 286 SBC as well and was able to switch to 3.5 floppies by modifying the BIOS settings. Mine has the Dallas Real Time Clock chip and the battery was dead so the BIOS settings weren't preserved after a reboot. Fortunately I obtained a replacement chip available on ebay to fix that issue. I haven't got a manual to share, but it's a neat little board. Jonathan On Tuesday, March 16, 2021, 12:00:02 PM CDT, <cctalk-request at classiccmp.org> wrote: Send cctalk mailing list submissions to ??? cctalk at classiccmp.org To subscribe or unsubscribe via the World Wide Web, visit ??? http://www.classiccmp.org/mailman/listinfo/cctalk or, via email, send a message with subject or body 'help' to ??? cctalk-request at classiccmp.org You can reach the person managing the list at ??? cctalk-owner at classiccmp.org When replying, please edit your Subject line so it is more specific than "Re: Contents of cctalk digest..." Today's Topics: ? 1. VAX rom patches - VAXstation 2000 SCSI boot, KA420 > 1GB boot ? ? ? (David Brownlee) ? 2. Re: Diversified Technology CAT904 80286 single board PC ? ? ? (david raingeard) ? 3. Re: PDP-10 I/O notes (Lars Brinkhoff) ? 4. who collects modems? (Tom Uban) ? 5. Re: Any info on a Western Peripherals DC-230 disk controller? ? ? ? (Jay Jaeger) ---------------------------------------------------------------------- Message: 1 Date: Mon, 15 Mar 2021 18:36:23 +0000 From: David Brownlee <abs at absd.org> To: rob at jarratt.me.uk,? "General Discussion: On-Topic and Off-Topic ??? Posts" <cctalk at classiccmp.org>, port-vax List <port-vax at netbsd.org> Cc: Malte Dehling <mdehling at gmail.com> Subject: VAX rom patches - VAXstation 2000 SCSI boot, KA420 > 1GB boot Message-ID: ??? <CAGN_6pbBzUQDJP-YiCQRZsaNOsGye1oWQ_ULyvavEd52ZrYp2Q at mail.gmail.com> Content-Type: text/plain; charset="UTF-8" I had some extra A4 pages with a VAXstation 2000 manual which covered a preview PK2K kit for VMS, bootloader and ROM to allow use of the VAXstation 2000 SCSI controller for more than just tapes. Rough scan at http://sync.absd.org/vax/VAX-PK2K-preview-kit.pdf (the originals will be sent to someone who can do a better job) The pages led me to http://ftp.gwdg.de/pub/vms/ which includes some goodies: - http://ftp.gwdg.de/pub/vms/pk2k - uVAX-2k SCSI patches with source for boot roms, VMB & VMS - http://ftp.gwdg.de/pub/vms/ka420 - ROM patches for KA420/KA430 boot >from >1GB disks - http://ftp.gwdg.de/pub/vms/dk-552/ - VMS 5.2 patch to allow to accept more SCSI disk devices (Starting a new thread in case there is (slightly) more general interest for anyone interested in using the onboard uVAX-2K SCSI controller more more than tapes (OK, OK, for anyone not running NetBSD on their uVAX-2K interested in etc etc) - have cross posted to cctalk & port-vax - hopefully not violating any conventions there) David ------------------------------ Message: 2 Date: Mon, 15 Mar 2021 16:41:54 +0100 From: david raingeard <david.raingeard at gmail.com> To: Tom Uban <tom at figureeightbrewing.com>,? "General Discussion: ??? On-Topic Posts" <cctech at classiccmp.org> Subject: Re: Diversified Technology CAT904 80286 single board PC Message-ID: ??? <CAFvDS1SvQZFE_dzGQaheyLRpFqh-ZqFZyyWpBaMg_D22gZ+8kA at mail.gmail.com> Content-Type: text/plain; charset="UTF-8" i rather do? what doe with ibm dos Le lun. 15 mars 2021 ? 16:23, Tom Uban via cctech <cctech at classiccmp.org> a ?crit : > It dawned on me that I probably just need to change a BIOS setting. I > haven't dealt with PCs in so > long I've forgotten what to do... > I would still like to find a manual if someone has one. > > > I have a Diversified Technology CAT904 80286 single board PC in a system > with a 5.25" floppy drive > running DOS. > > I would like to switch the system to use a 3.5" drive and am wondering > if anyone has a manual for > the dip switch settings for this board or if I can simply add a 3.5" drive > as a 2nd device on the > floppy cable (guessing not without switch changes)? > > > > --tnx > > --tom > > ------------------------------ Message: 3 Date: Tue, 16 Mar 2021 06:04:44 +0000 From: Lars Brinkhoff <lars at nocrew.org> To: Don Stalkowski via cctalk <cctalk at classiccmp.org> Subject: Re: PDP-10 I/O notes Message-ID: <7wzgz3zlab.fsf at junk.nocrew.org> Content-Type: text/plain Don Stalkowski wrote: > For what it's worth I've posted some notes on PDP-10 I/O from a course > taught by Mike Bennett at UWO in the early 1970s. Thank you! Interesting to see the DECtape file structure format. ------------------------------ Message: 4 Date: Tue, 16 Mar 2021 09:48:33 -0500 From: Tom Uban <tom at figureeightbrewing.com> To: "General Discussion: On-Topic and Off-Topic Posts" ??? <cctalk at classiccmp.org> Subject: who collects modems? Message-ID: ??? <d22a7559-5c13-28e5-eec0-b1587b5c5a79 at figureeightbrewing.com> Content-Type: text/plain; charset=utf-8 Clearing out stuff at my space, I have the following modems: NEC UltraLite-Series Image Modem Plus w/box CTS Datacomm 2424 ADA modem w/box Scout Plus External Data/Fax modem w/box Digital DF03 modem Any offers? --tom ------------------------------ Message: 5 Date: Tue, 16 Mar 2021 11:23:28 -0500 From: Jay Jaeger <cube1 at charter.net> To: Josh Dersch via cctalk <cctalk at classiccmp.org> Subject: Re: Any info on a Western Peripherals DC-230 disk controller? Message-ID: <0877749a-9d01-466e-9e59-854977e13808 at charter.net> Content-Type: text/plain; charset=utf-8; format=flowed I may have a little info - but the info is in storage, and it is just a "Western Peripherals Instruction Reference Card", apparently referring to the DC-230, PDP-11 and TC-130 (the latter being a tape controller, for which I do have some doc.) Once the weather warms up again - say, maybe this weekend, I'll trot off to storage, bring it back and scan it. Back in the 1970's the UW Madison CS Department's 11/20 had a 3rd party disk controller of some sort - one pack removable, one fixed, but I don't remember who made it (might have been Wangco). JRJ On 3/12/2021 5:02 PM, Josh Dersch via cctalk wrote: > Any ideas what this disc controller is? > > https://www.ebay.com/itm/PDP-11-Backplane-Western-Peripherals-DC-230-Disk-C… > > Can't find much about this on the 'net, other than that it was a controller > for Diablo/Pertec style drives -- no idea if it's an RK11 clone or > something else entirely. Looks to be suitable for a PDP-11/20 given the > little notch missing from the side there, and the lack of a separate power > harness for the backplane. > > - Josh > End of cctalk Digest, Vol 78, Issue 16 **************************************

4 years, 9 months

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Diversified Technology CAT904 80286 single board PC

by david.raingeard＠gmail.com

i rather do what doe with ibm dos Le lun. 15 mars 2021 ? 16:23, Tom Uban via cctech <cctech at classiccmp.org> a ?crit : > It dawned on me that I probably just need to change a BIOS setting. I > haven't dealt with PCs in so > long I've forgotten what to do... > I would still like to find a manual if someone has one. > > > I have a Diversified Technology CAT904 80286 single board PC in a system > with a 5.25" floppy drive > running DOS. > > I would like to switch the system to use a 3.5" drive and am wondering > if anyone has a manual for > the dip switch settings for this board or if I can simply add a 3.5" drive > as a 2nd device on the > floppy cable (guessing not without switch changes)? > > > > --tnx > > --tom > >

4 years, 9 months

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DEC Professional: software and docs for CP/M and PC-Bridge boards

by bdweb＠mindspring.com

I have two oddball CTI boards for my DEC Professional: a DEC-made CP/M board (P/N 54-15641) and a board labelled "VIRTUAL MICROSYSTEMS PRO BD. REV 1" which appears to be an x86 MS-DOS board (it contains an 8086, a video controller and a bunch of RAM). I've managed to get them both functional, I believe, but I don't have software or documentation for either. I did find the RCS/RI diskettes at https://web.archive.org/web/20040113090630/http://starfish.rcsri.org/rcs/pd…, but although the image files are uncorrupted it appears the diskettes were not read reliably in the first place. And I also know that at some point the PC-Bridge software and doc set was available on eBay (https://www.worthpoint.com/worthopedia/virtual-microsystems-pc-bridge-2-200…). Does anyone know where I can get a copy of the diskettes and/or documentation? Thanks. --Bjoren Davis

4 years, 9 months

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80286 Protected Mode Test

by jnc＠mercury.lcs.mit.edu

> From: Jim Stephens > The 286 can exit protected mode with the LOADALL instruction. Really? So why all the hullabaloo about Triple Faults: http://www.rcollins.org/Productivity/TripleFault.html back in the day; and why did IBM set up the keyboard controller so it could send a RESET signal (so people could get out of protected mode)? Or is it that LOADALL (which was also undocumented early on, so maybe that's why the IBM thing) could be used to cause a triple fault? Noel

4 years, 9 months

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VAXstation 2000 network & hardware guides (English & German)

by mdehling＠gmail.com

I'd be interested in the guides if you're located in Germany, and I do have access to a book scanner. Best, MalteOn Mar 14, 2021 19:08, David Brownlee via cctalk wrote: > > I have acquired a tiny slice of Orange Wall, and wondered if anyone would > be interested - preference for anyone who is setup to scan and upload the > missing bits to bitsavers or similar :) > > These seem to already be generally available online > EK-NETAB-UG-002 Workstations and MicroVAX 2000 Network Guide > EK-VAXAB-OM-002 VAXstation 2000 Owner's Manual (Covers how to replace your > mouse balls, and details exciting options such as LN03, LN03 PLUS, LPS40, > LA210, LA100, LA75, LA50. LGC01, LVP16, DF224, DF124, DF112, VSXXX-AB :-p) > > These I cannot immediately find > EK-NETAA-UG-001 VAXstation 2000, MicroVAX 2000 and VAXmate Network Guide > EK-VAXAB-IN-002 VAXstation 2000 Hardware Installation Guide > > Likewise these German versions > EK-NETGA-UG-001 VAXstation 2000, MicroVAX 2000 und VAXmate > Netzwerk-Anleitung > EK-A0305-IN 001 VR160 Installations-und Bedienungsanleitung > EK-A0355-OG-001 Grafikkoprozessor (8 Bildebenen) fur die VAXstation 2000 > Installations- und Bedienungsanleitung > > Thanks > > David

4 years, 9 months

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Classic browsing and duckduckgo

by rtomek＠ceti.pl

Howdy, I more often than not use one of the old style browsers (lynx, dillo etc). Using search engines with them was rather uncool (unusable links in search results, wanting to load some bs or js, etc). For this reason I type my searches using mozilla and very rarely trying this with duckduckgo and almost never with goog. Today I noticed that duckduckgo redirects my classic browsers to lite.duckduckgo.com and I can use the results. Cool! Tried with dillo and w3m. -- Regards, Tomasz Rola -- ** A C programmer asked whether computer had Buddha's nature. ** ** As the answer, master did "rm -rif" on the programmer's home ** ** directory. And then the C programmer became enlightened... ** ** ** ** Tomasz Rola mailto:tomasz_rola at bigfoot.com **

4 years, 9 months

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80286 Protected Mode Test

by robert.jarratt＠ntlworld.com

I have a DECstation 220 (Olivetti M250E) which is failing POST on a "simple test of the 80286 protected mode". It says in a service manual I have that for this test the CPU is set in the protected mode, the machine status word is checked to see whether it indicates the protected mode and then exits protected mode. This test seems to be failing. Is there any possible explanation for this other than a failed 80286 CPU? Could there be any external reason? This board suffered some battery leak damage. Clearly the 80286 is working well enough to execute this diagnostic and send some text to the screen, so it basically works. Thanks Rob

4 years, 9 months

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Help with PCB ID

by coryheisterkamp＠gmail.com

I?m wondering if anyone recognizes this PCB. Double-sided, 74xx vintage, measuring 14?x15?. There?s a ?B.I.? logo in one corner, but no google match. IC date codes are ?77/?78 vintage. There?s a pair of DB-25?s, a BCD encoder, and for some reason, two pots. DC rectification appears to take place onboard. I thought perhaps the 112-7753 marking might be a part or catalog number, however the flip side is marked 112-1754, so perhaps not. Anyone recognize it? -Cory https://photos.app.goo.gl/dogAPxn7vLV87YRw9

4 years, 9 months

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Looking for gnupro for BeBox BeOs PowerPC

by david.raingeard＠gmail.com

Hello, I am looking for cygnus gnupro for powerpc BeOS, to be able to make ports. thank you

4 years, 9 months

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PDP-8 Backplane on eBay

by jnc＠mercury.lcs.mit.edu

There's a PDP-8 (/E or /M) backplane (presumably OMNIBUS) on eBay: https://www.ebay.com/itm/0-slot-Backplane-H1919-9216/402735040240 (The number is given incorrectly in the title; it's actually 'H9191'.) Noel

4 years, 9 months

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[GreenKeys] OT FTGH Xerox 820

by jfoust＠threedee.com

Richardson, TX I assume. At 09:42 AM 3/11/2021, John, W9DDD wrote: >I have a Xerox 820 (rev 2 -II?) that will go to it's happy hunting grounds soon unless there is interest. > >Pictures if interested, part it out if it gets to that point. > >(On topic to the extent it makes room for more Teletype equipment.) > >-- >John, W9DDD >______________________________________________________________ >GreenKeys mailing list >Home: http://mailman.qth.net/mailman/listinfo/greenkeys

4 years, 9 months

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[GreenKeys] OT FTGH Xerox 820

by jfoust＠threedee.com

At 09:59 AM 3/11/2021, Tom Uban wrote: >I am interested if this is not already spoken for. I'm sorry, I forgot to include the giver's email. "John, W9DDD" <w9ddd at tapr.org> Contact him directly. - John

4 years, 9 months

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Is DECtape Read/Write Head "In-the-Weeds" Info Available?

by bobvines00＠gmail.com

Does anyone have "in-the-weeds" information on the DECtape read/write heads? I've got several TU-55 transports and a box of DECtapes (thank you very much Doug!) _and_ Michael's failed DECtape head from several years ago that I'm de-potting. I very much want to figure out how to repair Michael's DECTape head and will return it to him if I can do so. I've read the document that Al posted a link to in the discussion on DF32s: Message-ID: <1e97981e-05d9-f272-d2fe-10ae38da6668 at bitsavers.org> ... "remided me of the problems with rhodium plating on RF08 drives here on page 9 http://archive.computerhistory.org/resources/access/text/2012/08/102746014-… " The "Oral History of Grant Saviers" is interesting and gives a lot of information about various storage technologies that were used over the years. It reminded me of my desire to learn everything I can about DECtape _and_ DECtape transports. Maybe the CHM or someone else has interviews or tech data that helps answer my request? Bob

4 years, 9 months

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Need to have a roll of paper punch tape read by a tape reader and printed

by camiel.vanderhoeven＠vmssoftware.com

Gary, I don't know if you're in Europe or elsewhere. I'm in the Netherlands, and I could do that free of charge. I'd also make a video recording of the process for your sons education. Camiel ________________________________ From: cctech <cctech-bounces at classiccmp.org> on behalf of Gary Dye via cctech <cctech at classiccmp.org> Sent: Monday, March 8, 2021 11:30 PM To: cctalk at classiccmp.org <cctalk at classiccmp.org> Subject: Need to have a roll of paper punch tape read by a tape reader and printed Hi folks. I wrote a basketball program in Basic over 40 years ago in high school. I printed the 13 pages of code, and produced a roll of paper punch tape of the code, but the 13 pages were destroyed, leaving me with only the paper tape. My 14-year-old son was pretty fascinated to see the roll of computer punch tape -- paper with holes in it! -- that we used to store files in the old days. And that we didn't have computer screens, but only a teletype element that printed -- one letter at a time -- the back-and-forth information between the timeshare computer and the teletype (output). This paper punch tape is the Basic program that I wrote in high school that played a random basketball game (as called by Bill Schonely, radio voice of the Portland Trailblazers). I'm trying to find someone to run it through a tape reader so that I can retrieve the code and play the game again. I'm hoping to explain the code to Owen so that he might understand the power of coding and get interested in coding. Is there anyone out there that I can send my roll of paper tape to such that the code can be restored? I could pay some compensation for your troubles. Much appreciated, Gary This e-mail (including any attachments) may contain privileged, confidential, proprietary, private, copyrighted, or other legally protected information. The information is intended to be for the use of the individual or entity designated above. If you are not the intended recipient (even if the e-mail address above is yours), please notify us by return e-mail immediately, and delete the message and any attachments. Any disclosure, reproduction, distribution or other use of this message or any attachments by an individual or entity other than the intended recipient is prohibited.

4 years, 9 months

5
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DF32?

by cz＠alembic.crystel.com

There's a DF32 on Ebay. I've got a bid in on it, will see what happens. In the unlikely event I win I'll have to build a system to adapt the Negibus to the pdp8/L. However did the pdp8/L have 3 cycle data break? C

4 years, 9 months

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Need to have a roll of paper punch tape read by a tape reader and printed

by marvin＠west.net

OOPS on my last response... I should have said I found the original on the CCTECH archive. Hope there was no confusion there!

4 years, 9 months

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Need to have a roll of paper punch tape read by a tape reader and printed

by marvin＠west.net

FWIW, I went back to the CCTALK archives and could not find the original message either. Being curious, I went back to the CCTALK archives and there it was. > Hi folks. I wrote a basketball program in Basic over 40 years ago in high school. I printed the 13 pages of code, and produced a roll of paper punch tape of the code, but the 13 pages were destroyed, leaving me with only the paper tape. My 14-year-old son was pretty fascinated to see the roll of computer punch tape -- paper with holes in it! -- that we used to store files in the old days. And that we didn't have computer screens, but only a teletype element that printed -- one letter at a time -- the back-and-forth information between the timeshare computer and the teletype (output). This paper punch tape is the Basic program that I wrote in high school that played a random basketball game (as called by Bill Schonely, radio voice of the Portland Trailblazers). I'm trying to find someone to run it through a tape reader so that I can retrieve the code and play the game again. I'm hoping to explain the code to Owen so that he might understand the power of coding and get interested in coding. > > Is there anyone out there that I can send my roll of paper tape to such that the code can be restored? I could pay some compensation for your troubles. > > Much appreciated, > > Gary

4 years, 9 months

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Tymshare PDP-10 tapes

by lars＠nocrew.org

Hello, Someone sent me these magtape images from Tymshare and said "they fell off the back of a truck on route 62 in Hudson, MASS." I don't know their provenance. Sorry, I don't have any good hosting. For now they are here: https://gitlab.com/larsbrinkhoff/tymshare The download.sh script will retrieve individual files one by one rather than cloning the repository; next use cat.sh to get the .tape.bz2 files. The tape format is close to not not quite FAILSAFE. With help from Joe Smith, I made a tool to extract the files: https://github.com/larsbrinkhoff/pdp10-its-disassembler/blob/master/tito.c

4 years, 9 months

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From SIMH list: Whirlwind software recovery

by phil＠ultimate.com

> From: "Christian Brunschen" <christian at brunschen.com> > Date: Mon, 8 Mar 2021 21:45:11 +0000 > Subject: Re: [simh] recovering software for the MIT Whirlwind > To: simh at groups.io > > https://www.historia-mollimercium.com/whirlwind/ww-page.html > https://www.historia-mollimercium.com/whirlwind/Whirlwind-Software-Recovery… > ? > > On Mon, 8 Mar 2021 at 21:41, "Nelson H. F. Beebe" <beebe at math.utah.edu> > wrote: > > > The latest issue of IEEE Annals of the History of Computing has an > > article that may be of interest to some list members: > > > > G. C. Fedorkow > > Recovering Software for the Whirlwind Computer > > IEEE Annals of the History of Computing 43(1) Jan/Mar 2021 pp. > > 38--59 > > https://doi.org/10.1109/MAHC.2020.3048815

4 years, 9 months

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Spelunking the places where files are not

by jfoust＠threedee.com

At 03:16 AM 3/8/2021, Tor Arntsen via cctalk wrote: >Linux distros come with a standard tool to do some of that, >'testdisk'. From the overview: I'm familiar with the various undelete tools for Windows and Linux. Such tools may not exist or make sense for older file systems. Entire files would be great to find, but I suspect interesting fragments may be more likely. Running a Windows-based tool like Recuva on a hard drive leads to such a firehose of fragments if you choose the deep scan that examines all unused blocks. I've only tried the free version. Does the pro version give you a way to exclude all the dozens of OS file types that are probably not the user-made files that you want? And for the archaic disk formats, it would be good to have platform-specific methods of identifying fragments to guess their file type beyond executable and ASCII. Older run-length compression image formats may be more possible to recover than today's block-compressed images. - John

4 years, 9 months

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RSTS processor identification

by paulkoning＠comcast.net

I was just asked some questions about how RSTS identifies your processor type. Since that topic might be of broader interest I figured I'd do some code reading and summarize the logic. In the RSTS initialization code (INIT.SYS), the first step is to identify what your hardware looks like. That is a combination of CPU type, bus type, memory layout, and peripheral configuration lookup. They aren't strictly separated into sequential blocks for those four activities, though naturally you'd want to know the bus type before you start looking for I/O devices on that bus. What I describe here is in RSTS/E V10.1. The general idea of scanning the hardware was introduced in V6B, and I believe is basically the same from that time onward apart from the addition of support for more hardware types. Prior to V6B, the assumption was that you had the hardware you specified during SYSGEN, neither more nor less. Here is an outline (not all the details) of the hardware scan flow: 1. If word 0 of the boot block contains a zero, this is a Pro (CT bus); otherwise it isn't. 2. Make sure the MMU exist; if not, halt. 3. Check the CPU type (MFPT instruction). If it's an F-11, see if 177570 exist. If yes, 11/24 (Unibus); if no, 11/23 (Qbus). If it's a J-11, read the board type register at 177750 and use the bus type bit to distinguish Qbus from Unibus. 4. Check that there is a clock, and if possible determine the power line frequency. 5. Check if there is a CPU cache, and whether there is a cache error address register. 6. If Qbus, check whether there is memory above the 18 bit range. 7. Check that there is at least 96kW of memory (but the message says that 124kW is required -- the actual check value was apparently overlooked and not updated). 8. Check CPU features: EIS (required), FPP, FIS, switch register, display register, MED, two register sets, system ID register, CIS, Data space. 9. If Unibus, check for UMR. 10. Find where memory is. This is done by looking at every 1kW address to see if it answers. So unlike some other operating systems, RSTS will keep looking if it finds a hole in memory. The kernel needs to be at 0 and contiguous, but holes above that are not a problem. 11. Scan the I/O bus for peripherals. This uses the fixed addresses and float rules for Unibus/Qbus (either, the code doesn't care) or the slot use bits and device type register codes for the Pro. 12. Find the vectors, which for almost every device is done by making it interrupt. 13. Identify specific device models if we care, like RL01 vs. RL02, Massbus disk type, DMC/DMR/DMP, etc. 14. Find which of these devices we were booted from. That's about it. Once you get past that point the INIT prompt appears and you can ask what INIT found with "HARDWARE LIST". Incidentally, RSTS doesn't try to identify the exact CPU type you have. Instead, it cares about features or distinctions that affect the code. In a number of cases it does report the type -- if MFPT works then "hardware list" will report that information. But for older CPUs, it doesn't say explicitly, though you can deduce it to some extent. If no type is given but there is cache and more than 128 kW of memory, it's an 11/70. If MED is available, it's an 11/60. If it has FIS, it can only be an 11/40. Etc... paul

4 years, 9 months

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RSX11D disks on EBAY- anyone interested?

by lee.gleason＠comcast.net

? Saw this on EBAY today - three RK05s with what looks like at least part of RSX11D on them. Who knows, it might be a distribution - RSX11D distributions came on 3 RK05s. https://www.ebay.com/itm/PDP-11-RSX-11D-Executive-Programs-Phase-II-3xRK05-… ? The auction starts at? more than I have in my computer budget this month, though - would some other RSX historians like to go in together on this (preferably at least one person with an RK05 drive)? ? I'd just like the contents of the disks - I don't care about the physical disks, just what's on 'em -- Lee K. Gleason N5ZMR Control-G Consultants lee.gleason at comcast.net

4 years, 9 months

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