- 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, 11 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, 11 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, 11 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, 11 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, 11 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, 11 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, 11 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, 11 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, 11 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, 12 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, 12 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, 12 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, 12 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, 12 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, 12 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, 12 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, 12 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, 12 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, 12 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, 12 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!

5 years

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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

5 years

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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

5 years

3
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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

5 years

2
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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

5 years

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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?

5 years

5
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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

5 years

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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

5 years

1
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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

5 years

5
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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

5 years

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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

5 years

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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

5 years

1
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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

5 years

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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

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 >> > >> >

5 years

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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

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

5 years

1
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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

5 years

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IBM cpu tear down

by kl＠2k.ca

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

5 years

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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

5 years

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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

5 years

6
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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.

5 years

1
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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

5 years

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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?

5 years

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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

5 years

6
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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

5 years

2
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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

5 years

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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

5 years

3
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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

5 years

4
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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

5 years

3
5
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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

5 years

3
2
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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

5 years

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