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

by jnc＠mercury.lcs.mit.edu

Does anyone know if an ECO exists to convert a REV11 board (M9400) to 22-bit, in the same way that an ECO exists to convert BDV11's to 22-bit? (On the BDV11, there's a resistor pack with 4 unused pull-up/down pairs, making it a really trivial ECO.) Noel

11 years, 7 months

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ICL Quattro

by supervinx＠libero.it

Hi! Does someone have some links or manuals about the ICL Quattro model 49 PC? I serviced the PSU, but have no response from the serial ports on the back. Can't say what the port numbering is and if they are DCE or DTE (I assume 9600,8,N,1, may be I'm wrong...). Thanks! -- Vincenzo (aka Supervinx) --==ooOoo==-- My computer collection: http://www.supervinx.com/Retrocomputer --==ooOoo==-- You can reach me at: www.supervinx.com www.facebook.com/supervinx http://www.youtube.com/user/supervinx http://www.myspace.com/supervinx

11 years, 7 months

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PDP-11/23 Debugging

by jnc＠mercury.lcs.mit.edu

> Common practise is to set the vectors at X to point to X-2, and put a > HALT instruction in X+2. Ooops, typo. That first "X-2" should be "X+2". Noel

11 years, 7 months

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PDP-11/23 Debugging

by jnc＠mercury.lcs.mit.edu

> From: Ben Sinclair > It halts back to ODT at 00104 Depending on how the vectors are set up, that could be an unhandled clock interrupt. Common practise is to set the vectors at X to point to X-2, and put a HALT instruction in X+2. 0100 is the line clock interrupt vector. > there is a strange modification... On my original M8186, there is a > capacitor on the left, after the first row of chips, when looking at it > from the tab side. You mean the component side? > The "new" one has that capacitor replaced with a piece of perfboard > with two smaller capacitors, and a two pin connector. I have no idea > what that might be Maybe the electrolytic failed, and the person couldn't find the right size replacement, so used two smaller ones in parallel? > When I run the program, it halts at 000014. That means it trapped through location 010 (illegal instruction); the vector there points to location 012; it executed the HALT instruction at 012, and stopped with the PC containing 014 (the location of the next instruction - see the description of the HALT instruction in most versions of the PDP-11 processor manual). To find out the location of the illegal instruction, you need to look on the stack: R6 (the SP) will point to to top of the stack, and the PC and PS at the time the illegal instruction were seen will be the top two things on the stack. (I forget whether they are in (SP) and (SP+2), or (SP+2) and (SP+4). And I forget whether the saved PC is the address of the bad instruction, or if the PC has already been incremented to point at the next instruction.) But I'm not sure that's really going to tell you much. If it's a hardware flaky, the fault may be happening on a perfectly good instuction. > the error address should be in R1, which reads as 004330. I did try and > write to that location, and it reads back fine. But if you trapped through 10, that's not caused by that memory location being a problem. > I'm confused though, because it halts at 000014, but that program > doesn't have an instruction at 000014. .. I would have thought it would > halt on some location that actually had an instruction. After a HALT instruction, the PC points to the _next_ instruction after the HALT. So the HALT was at 012. > What exactly does the aux switch on the front panel control? I assumed > it was power to the AC plug on the back of the machine, but it must do > something else. Well, it depends on what model of box you have, and how it's configured, but on standard DEC LSI11 boxes (the ones with three switches; Restart, Run/Halt, and Aux), the Aux can be configured (and normally is) to turn the Line Clock off and on; the Aux power thing is an optional behaviour. That would definitely fit the symptoms and behaviour you describe. > From the documentation, I don't see that it does anything other than > control that AC plug. There's documentation somewhere (don't recall off the top of my head - it won't be in the processor card stuff, it will be in the box documentation) about how to configure the Aux switch. Basically there are some jumpers on the PCB in the front panel. Noel

11 years, 7 months

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what has happened to the ML archive?

by tom_a_sparks＠yahoo.com.au

What has happened to the ML archive? tom

11 years, 7 months

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BLIT display debugging advice

by derschjo＠gmail.com

On 10/26/2014 8:09 PM, Josh Dersch wrote: > On 10/25/2014 10:17 PM, Don North wrote: >> On 10/25/2014 8:14 PM, Josh Dersch wrote: >>> I picked up a Teletype DMD 5620 (aka BLIT) terminal a couple of >>> weeks back and I finally got the keyboard working this week; in the >>> meantime a problem with the display has cropped up. >>> >>> See here for a video: >>> http://yahozna.dyndns.org/scratch/blit/WP_20141023_001.mp4 >>> >>> (apologies for the quality and that it's rotated 90 degrees... you >>> get the general idea). >>> >>> For those without video-playback capability, essentially after >>> warming up for awhile (generally after a couple of minutes) the >>> screen starts shaking horizontally; like the horizontal position is >>> oscillating rapidly. This causes "fringes" on the horizontal edges >>> of the picture, as this oscillation occurs multiple times during the >>> course of a single rescan. Generally it gets worse and worse the >>> longer it's been on, though sometimes it will stabilize for a little >>> while. >>> >>> I thought it might be a bad solder joint and I started prodding >>> around with a dowel when the set was "cold" but I was unable to make >>> the screen jump at all while doing so. I also cleaned the >>> horizontal position and horizontal oscillator pots with some contact >>> cleaner to no real effect. >>> >>> I am not particularly good with CRTs, working on them is not my >>> favorite thing, something about the high voltages I guess :). Anyone >>> have any suggestions? >>> >>> Thanks, >>> Josh >>> >> >> It appears the the screen is jumping in some integral number of >> pixels horizontally, like 32 or 64. I don't see any vertical scan >> line displacement. >> >> I would check that the digital horizontal sync (and blanking if >> available) are rock solid, and that the digital pixel stream is gives >> a stable eye, and >> it solidly locked to the horizontal sync signal. >> >> Based on the short little movie I would suspect more of a digital >> issue than a monitor analog issue, at least for starters. >> >> Don >> >> > > Thanks (to both you and JWS) for the tips. I'll see if I can get a > scope hooked up to the sync signals sometime this week, though the way > the behavior progresses (it gets steadily worse and the amplitude of > the oscillations gets greater) makes me think it's probably not a > problem with the signal coming from the display logic -- a digital > failure I'd expect to stay approximately the same, something that > increases in magnitude over time seems more like an analog thing, but > maybe I'm jumping to conclusions :). > > At any rate, it doesn't appear to be a thermal issue -- I powered it > on this afternoon and it's now immediately showing the issue, much > worse than before; to the extent that I can hear a not-very-pleasant > whining from the flyback that makes me nervous to run it for any > significant length of time as I'm afraid something (like the flyback) > might get damaged. > > I may attempt a recap at some point (when I find time -- I don't know > why I keep getting into new projects when I have no time for them...) > since it's likely due anyway. There are a lot of capacitors to > enumerate and stuffed into a relatively tight space. Did I mention > that I hate working on CRTs? :) > > Thanks again, > - Josh > > Just a a quick follow-up here: I recapped the BLIT this weekend. Recapping the monitor's power supply had no effect but after doing the main PCB it seems to be humming along nicely. I also redid the logic power supply while I was at it. Now to fix the mouse... - Josh

11 years, 7 months

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FS: Apple 20SC Hard Disk, Tape Backup 40SC and Apple CDSC- Zero Footprint Drives for Plus/SE

by slandon110＠gmail.com

More stuff cleaning out from the move Got the following in working condition. These are all zero footprint and fit under the Compact mac machines. Also stacks nicely next to the Mac II Series Apple 20SC External SCSI Hard Drive- Commonly used with the Mac Plus and SE Apple Tape Backup 40SC- Tape Backup drive Uses QIC Tape Apple CDSC Single Speed CD-ROM Drive

11 years, 7 months

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MCT Serial board mystery - Can you crack the pinout code?

by drlegendre＠gmail.com

Decided to take a good shot at putting my only S-100 serial board to use. Figured the place to start was ID'ing the connector pin-outs so I could set up a cable and begin the process. Lacking any docs whatsoever, all I could do was trace out the PCB and try to ascertain what was what. So here's what I've come up with - can +you+ figure out which pin is which? Board has two outputs, J1 & J2. They are standard 10-pin DIP headers, using the standard numbering scheme. We'll look at J1; J2 is essentially the same, but routes to different pins / chips / transistors. Pin 1 - Col. of 2N3906 (Base is driven by opt. 2 of 1458 - see Pin 7) Pin 2 - Pin 28 (DB3) of both 1014 & 1015 UARTs Pin 3 - 1K pull-up to Vcc (12V? Same Vcc as 1458s) Pin 4 - 150R -> 47R -> Pin 6 w/ XNOR input 1A at 150/47 junction Pin 5 - n/c Pin 6 - 47R -> 150R -> Pin 4 w/ XNOR input 1A at 150/47 junction Pin 7 - 1K2 -> opt. 2 of 1458 (see Pin 1) Pin 8 - GND Pin 9 - 1458 opt. 1 Pin 10 - GND So we have what looks like three (3) each Inputs & Outputs, plus a Vcc and GNDs: Inputs - Pin 2, 4, 6 Outputs - Pin 1, 7, 9 Vcc - Pin 3 Gnd - Pin 8, 10 So.. what do +you+ make of it? =)

11 years, 7 months

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FS: Commodore 64 Items. ZoomFloppy, User Port Relay Cart and Comet64

by slandon110＠gmail.com

Just clearing out more stuff, got the following commodore 64 items that need a home Jim Brain's ZoomFloppy- Allows you to connect your 1541 to your PC to make Floppy Disks- Works Great. First $20 shipped takes it Comet64 Internet Modem- Serial to Ethernet Adapter for your C64, Also allows you to use Virtual Disks over the internet. First $25 shipped takes it. User Port Relay Cartridge Essentially a GPIO Cart for the C64, you can turn relays on and off through basic $20 shipped Takes it

11 years, 7 months

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Just Moved: Clearing out sale

by slandon110＠gmail.com

I just moved into a new place, and after moving the amount of computer stuff I have, Ive decided that I need to thin the collection. I have the following Nice original Mac 128k with carry bag, manuals, original ssw disks, boxed external 1200 modem, external floppy disk drive And Imagewriter I- Everything is there except the box, Has boxed Mac Software with it too, MacTerminal, Mac Pascal. MacPaint/MacWrite. Even the original audio cassette tour tape. Mac 512k- Has Aldus Asset Tag on it #201- Former Pagemaker Dev machine, with external hard to find Hard Disk 20, the one that connects to the floppy port. Macintosh Plus- Works but needs a keyboard & Mouse Macintosh Classic- Works but needs a cap job. Make a fair offer on anything. It needs to go

11 years, 7 months

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pdp11/93 DB9 rs232 pinout

by jnc＠mercury.lcs.mit.edu

> From: Al Kossow > It's pretty much just the odd manual from here and there that I'm > adding now. Speaking of which, is there by any chance a master list somewhere of stuff you're looking for? Or if Manx says 'not available online', can I take that to the bank? (Although identifying missing things that way's kind of tedious - one has to type each document's ID into Google to see if it's available.) Because I just bought a big stack of stuff, and perhaps some of it is stuff that's not available online - if so, I'd be happy to scan any such. Noel

11 years, 7 months

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pdp11/93 DB9 rs232 pinout

by jnc＠mercury.lcs.mit.edu

> From: Johnny Billquist >> (.. the page in the 11/94 User Guide .. pg. 1-4 - is missing from >> all the online copies of that manual which I checked.) >> ... >> the pinout on the board is given in the KDJ11-E User's Guide >> (EK-KDJ1E-UG-001, available online) > PDP-11/9x manuals are not scarce at all. Where do you people search??? > 11/93: > http://bitsavers.trailing-edge.com/pdf/dec/pdp11/1193/EK-KDJ1E-UG-001_KDJ11… > 11/94: > http://bitsavers.trailing-edge.com/pdf/dec/pdp11/1194/EK-PDP94-MG-001_Sep90… If you actually read my message (the one you included in your reply), you will see that I referenced _both_ of those (the 94 'MG' document is fully titled the 'System User and Maintainence Guide' - I shorted that mouthful to make it less work to type), and indicated they were available online. And the '93' manual you list is not for the 93, but rather is for the KDJ11-E CPU card, which is used in _both_ the 93 and 94. (That document is also mostly duplicative of the 94-MG.) Needless to say, there's a lot more to those systems than the CPU card, although some of it (e.g. the power supplies) _may_ be documented separately; I haven't checked. Typical DEC systems have a lot of other documents, none of which seem to be available online for the 93/94, including (typically): User Manual Technical Manual Maintainence Manual Field Maintainence Print Set Illustrated Parts Breakdown For the KDJ11-E there does seem to be the "KDJ11-E CPU System Maintenance Manual" (EK-403AA-MM-001), but that doesn't seem to be available online. The one 11/94 document I know of (the System User and Maintainence Guide) does reference the Field Maintainence Print Set for the 11/94 (MP-02637-01 - but according to Manx, that's not available online), and the IPB. So probably the other ones don't exist for the /94. I don't know which of these documents even exist for the /93, since I can't find a single 93-specific document - which might list what other /93 documents exist. Noel

11 years, 7 months

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pdp11/93 DB9 rs232 pinout

by jnc＠mercury.lcs.mit.edu

> From: Roe Peterson > Can anyone point me at the pinouts for the KDJ11-E pdp11/93 DB9 rs232 > connectors for the extra 7 (simulated) DL11s? Alas, documentation on the 11/93-94 seems to be very scarce on the ground. (And, just for grins, the page in the 11/94 User Guide which has the section - 1.2.6 - which talks, however briefly, about that panel - pg. 1-4 - is missing >from all the online copies of that manual which I checked.) The only thing I can suggest is that if you actually have the cable, the pinout on the board is given in the KDJ11-E User's Guide (EK-KDJ1E-UG-001, available online), on pg. 88-91 (aka 2-13 to 2-16), and an ohm-meter and some time will give you the pinout of one of the DB9's - presumably they are all the same, from there. Noel

11 years, 7 months

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XT keyboards (and missing decal)

by jules.richardson99＠gmail.com

Hi all, I've got a 5160 here with the XT keyboard - however it's got the 64/256K motherboard fitted (with the "early" Jan '86 EPROMs), and Wikipedia seems to claim that by the time the 64/256K boards came out the machines were shipped with 102-key keyboards (the XT flavor of the Model M, I assume). Anyone know if that's true, and so my system should technically have a "full size" keyboard, or was there a crossover period where systems with the newer boards shipped with the 83-key XT keyboards? Everything else about the machine suggests it was built sometime '86 (dates on the PSU, IC date codes on the expansion boards etc.), although it has a 20MB F/H IBM hard drive (rather than the H/H Seagates that I think the newer systems got). There's no ID info on the underside of the keyboard like there is on my Model M; I'm not sure if there should be. Also, I'm missing the silver keyboard decal - I believe these just said "IBM personal computer" like they did for the 5150, even though the 5160 case decal mentions XT. Does anyone have one they could pull from an otherwise-junk keyboard that they might be willing to part with? cheers Jules

11 years, 7 months

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Kearney & Trecker Core memory, may be PDP8

by jws＠jwsss.com

I can't tell for sure, but this auction may be for PDP8 core board. KT-KEARNEY-TRECKER-ASSY-KT83-0933-KT84-020-SYSTEM-BOARD http://www.ebay.com/itm/181565552717 board is 6 across in size. From what I could find out K&T used PDP8 for NC controlled machines at some time. There is also this sort of board. The silkscreen shows a Microprocessor section outlined with a 40 pin ceramic gold chip. I am going to query the vendor to get a picture where you can read what is on the can, or get the text on the can. Maybe the thing is a Harris part, don't know. Since the listing is for Giddings and Lewis, which is either a subsidiary or competitor of K&T it may be another completely different system. It looks like K&T, G&L and Cincinnati Millacron had a number of legal runnins as there were several lawsuits in the google hits when looking these boards up. CM used an OEM Microdata 1600, and later 3 generations of their own 1600 derived designs before moving on to other newer microprocessor scale parts. The CM 800, and 900 and one later are all 1600s, or near relatives os such. The 900 uses 8K, 16K microdata manufactured core boards, and also the Ampex / CDC 32k core board. I buy all those that show up cheap on the usual auction site. Here is the processor board: GIDDINGS-LEWIS-KT-KEARNEY-TRECKER-871-20410-05-SYSTEM-BOARD http://www.ebay.com/itm/181564464339 Jim

11 years, 7 months

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pdp11/93 DB9 rs232 pinout

by roeapeterson＠gmail.com

Can anyone point me at the pinouts for the KDJ11-E pdp11/93 DB9 rs232 connectors for the extra 7 (simulated) DL11s? Thanks.

11 years, 7 months

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pdp11/93 DB9 rs232 pinout

by jnc＠mercury.lcs.mit.edu

> From: Henk Gooijen > I wanted to connect a VT510 to the console port. All connectors are > DE-9 Really? The PDP-11/94-E User Guide (EK-PDP94-MG-001), available online in a number of places, shows (pg 46, aka 2-18) the Console/SLU panel, and the Console connector is much larger than the SLU connectors. (The illustration shows a 23-pin D-type connector - presumably an error, it should have been 25.) And here: http://www.pdp-11.nl/pdp11-93/rear-panel-small.jpg is a picture of one, and it indeed has the 25-pin console connector. Although I suppose it's possible they changed the actual hardware at some point, and some real machines have a 9-pin D-type? Or maybe a VAX of some sort uses a similar panel, but with all 9-pin D-types, and someone had stuck on of those on that machine? > What worked for me is the "VAX console cable", in other words: that > DE-9 connectors is NOT "PC alike"! You can find the VAX console cable > pinout on the web. Good catch! It makes sense that the VAX and 11/93-94 use the same 9-pin D-type pinout; that way they'd only have to have one kind of cable. Noel

11 years, 7 months

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Seeking pdp-11/40, 45, 50, 55, or 70 front panel bezel

by dgriffi＠cs.csubak.edu

I have a pdp-11/70 front panel, but no bezel. Does anyone here have one? I understand that the 11/40, 11/45, 11/50, 11/55, and 11/70 had identical bezels. -- David Griffith dgriffi at cs.csubak.edu

11 years, 7 months

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test

by jwest＠classiccmp.org

Sorry, testing myself.

11 years, 7 months

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EAI Pace TA-10

by dave.g4ugm＠gmail.com

Folks, I have just bought one of these and it is behaving oddly. I think the PSU regulation is faulty. Does any one have a schematic of the PSU, or even just the regulator board. I think the US and UK actually have the same PSU as my UK version has 2 x 110 Volt primaries strapped in series. . Dave Wade G4UGM

11 years, 7 months

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Non-CRTC PET video circuitry...

by derschjo＠gmail.com

Yet another "oh, let's spend an evening doing a small project" that's ballooned into a major undertaking: I thought I'd try my hand at getting my old PET up and running again; this is an original "chiclet" keyboard model (with 6550 RAMs and no CRT Controller chip). There are a multitude of problems with it (the CPU isn't resetting, I'm sure there's bad RAM and ROM) but I thought I'd start with the most obvious fault -- the video generation. Here's a picture of what it's currently doing (sorry it's not very good...) : http://yahozna.dyndns.org/scratch/pet/oneline.jpg It's only drawing a single line of characters (garbage with some noise due to a very terrible socket holding the character ROM), centered vertically. I initially thought this was a VRAM addressing issue (a stuck counter or whatnot) but it turns out the VSync signal is much too fast -- it's only about 1.2ms long (it's supposed to be about 16ms). I'm actually surprised the monitor can deal with that without damage, so I've been leaving the monitor disconnected while debugging. The HSync period is correct (63.8us or so), and most of the addressing / character display logic (which is driven by earlier portions of the video timing chain) seems to be running correctly, it's just only getting a chance to draw one line of characters before the next frame starts. I'm not having much luck tracing down the fault; I have a schematic (http://www.zimmers.net/anonftp/pub/cbm/schematics/computers/pet/2001/320008…) but it's not making it easy to work out exactly how everything ties together. I can't find anything resembling a service manual for this model, but perhaps I haven't looked hard enough yet. The initial clock (output of E2 pin 6) is correct at 8Mhz; this is divided down to 2Mhz by the counter at C9 (pin 8, the divide by 4 output), which is passed to the 74LS107 at C7 and from here it gets murky and I don't quite see how things fit. I did replace C7 to no effect (ok, I jumped to conclusions...). The divided clock outputs (Q, pins 3/2) from this have a period of about 256us; the LS107 at B6 divides this down to the final period of 1.2ms which is used for the VSync signal. Has anyone here any experience with this hardware? Any tips? Thanks, Josh

11 years, 7 months

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Jack Livesley (co-host with Jim Butterfield) comes to the Personal Computer Museum Saturday

by sbolton＠bfree.on.ca

For those that remember "Bits & Bytes" and "The Academy on Computers" that aired on TVOntario in 1983, I have some great news! While sadly Jim Butterfield passed away in 2007, co-host of the Academy, Jack Livesley, is still around and will be coming to the Personal Computer Museum (http://www.pcmuseum.ca) in Brantford, Ontario, Canada to do a live Q&A Saturday November 15, 2014 at 1:00 PM EST. For those that are not aware, the Personal Computer Museum is a not-for-profit and the only interactive personal computer museum in Canada. It is also home to Canada's largest videogame collection (over 15,000 games and counting) and also home to the largest known collection of CED video discs too! The visit is of significance to me personally because Jack was one of the people that inspired me to choose computers as a career path. He will be accompanied by Karl Hildon, who was the editor of "Transactor" magazine which folks that loved Commodore computers will definitely remember as well. Directions and more information can be found on our website. For a glimpse at Jack and more details on the event, please see http://pcmuseum.ca/jacklivesley.asp Admission is free although donations of electronics and money are always appreciated!

11 years, 7 months

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Sun Intertel NEC for sale

by towtechsteve＠gmail.com

Make Offer If Interested, Thanks Sun Microsystems Server / 2 units - Sunfire 6800 - Removed from working condition Inter-Tel (100+ units / Cords and Headsets were disconnected) - Model ? Standard Digital Terminal - Part Number ? 550.4400 Inter-Tel (50+ units) / Cords and Headsets attached) - Model ? 8520 - Part Number ? 550.7200 NEC (25+ units) / Cords and Headsets attached) - Model ? DTH-8D-2(BK)TEL - Part Number ? Dterm 80 T.O.W.E.R. Surplus Steve Swindell (412) 657-2800 [AIM: (Steve Swindell) towersurplus at gmail.com]

11 years, 7 months

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drop in traffic yesterday

by jwest＠classiccmp.org

The drop in list traffic yesterday was my fault. The problem was on a system unrelated to the classiccmp server, but it only affected the classiccmp server. I believe it would have impacted just over a day of traffic. Problem resolved, and my apologies. Details for the tech oriented: Our hosting service has two front end mail processors (mx1/mx2) that do a lot of quick/basic checks before passing mail onto the backend mailbox servers. One of them had an issue and had to be restored from a backup that was a couple weeks old. We don't normally think anything of that in this particular case, because the config files on a front end mx basically never change so any backup is good. Much to my chagrin, I didn't realize that the backup for mx2 was taken BEFORE switching the mail stream for classiccmp.org >from the old ccmp server to the new one. Since both front end mail servers are equal preference, that means that about half the inbound mail for classiccmp.org was being directed to the old server which has pretty much been sliced up as things were migrated to the new server. Last night I changed mx2 to deliver to the correct/new classiccmp server (mx1 was already doing so), and that fixed the problem. Newbie mistake, my apologies. Best, J

11 years, 7 months

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Fwd: Undelivered Mail Returned to Sender

by woyciesjes＠sbcglobal.net

Hrm? -------- Forwarded Message -------- Subject: Undelivered Mail Returned to Sender Date: Thu, 13 Nov 2014 18:39:13 -0600 (CST) From: Mail Delivery System <MAILER-DAEMON at classiccmp.org> To: woyciesjes at sbcglobal.net This is the mail system at host huey.classiccmp.org. I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below. For further assistance, please send mail to postmaster. If you do so, please include this problem report. You can delete your own text from the attached returned message. The mail system <General at classiccmp.org>: unknown user: "general" -- --- Dave Woyciesjes --- CompTIA A+ Certified IT Tech - http://certification.comptia.org/ --- HDI Certified Support Center Analyst - http://www.ThinkHDI.com/ Registered Linux user number 464583 "Computers have lots of memory but no imagination." "The problem with troubleshooting is that trouble shoots back." - from some guy on the internet.

11 years, 7 months

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HP3000 Boards Available

by leec2124＠gmail.com

I have several untested spare boards for HP3000 9xx series systems available for shipping from 94025. 1. 802.3 interface board (HP 27125-80201) - I have a mystery cable that may go with this board, included. 2. HP-IB interface (HP 27110-60301) with couple cables 3. MUX card (HP 27140-60001) - this may be for a HP-UX 800 Series machines. First come, first serve. Contact me off-list via lee_courtney at acm.org -- Lee Courtney

11 years, 7 months

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CPT wordprocessors

by simski＠dds.nl

Hello all, we have two machines in our collection: a 8515 and a phoenix, both rebranded to OCE, a dutch plotter manufacurer. Both machines are missing their bootmedia. is someone able to copy those or image them? The 8515 uses 8" media, the phoenix 3.5" -- Met vriendelijke Groet, Simon Claessen drukknop.nl

11 years, 7 months

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Full-size 600 ohm telo transformers

by cclist＠sydex.com

I've got a bunch (maybe half a dozen) 600 ohm - to -600 ohm telco line transformers. Nice units, maybe 5 inches tall by 2.5 inches wide, and potted. Use 4 8/32 screws for mounting. Is there any use for this stuff? Does anyone want them? --Chuck

11 years, 7 months

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Wanted: Altair / S-100 serial comms board w/ documentation

by drlegendre＠gmail.com

Just taking a stab.. I've run out of options trying to locate docs for the lone S-100 serial board in my stash, so I think it's time to look for a new unit. I don't own a logic analyzer, nor have I sufficient experience to figure out how to put my current board to use in the absence of docs.. so it goes. Does anyone have an S-100 (for Altair, in specific) RS-232 / serial communications board with available documentation? Just looking for something that can be made to work with a common serial terminal (emulated) so I can play around with BASIC and so forth. Plan is to use a basic 486 / Pentium laptop running Linux + Minicom or similar to emulate a VT-whatever on the Altair's comms port. (As an aside.. a bit of a mea culpa - I +did+ once own a genuine ITT (I think it was ITT) tele-tank with a paper tape machine. Picked it up for $15 at a local electronics surplus - AxMan - back in the early 1980s. It didn't work right.. or at least I had no idea what to do with it. When powered-up, it would begin to print blank lines over & over, line after line.. just sat there, running away like crazy doing nothing. I had not the slightest idea how to deal with it, so I removed the works >from the top of the base, and THREW IT OUT OF MY SECOND-FLOOR BEDROOM WINDOW. It was so heavy, I didn't want to have to carry it back down. The base served as an excellent printer stand for several years, and the not-so-obvious access panel did well to conceal various contraband during the same period.)

11 years, 7 months

2
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Kearney & Trecker Core memory, may be PDP8

by anders＠abc80.net

Hello, Here is some hi resolution pictures on front/back of a MM8-AB 16K core. Fits perfectly in a PDP-8a that has the correct power supply (G8018). http://www.abc80.net/docs/pdp8/pdp8a/DSC_2252.JPG http://www.abc80.net/docs/pdp8/pdp8a/DSC_2253.JPG The picture on ebay is really bad, but you can see that it is the same. /Anders > Message: 5 > Date: Wed, 12 Nov 2014 08:47:37 +0100 > From: Mattis Lind <mattislind at gmail.com> > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Subject: Re: Kearney & Trecker Core memory, may be PDP8 > Message-ID: > <CABr82SLXMERy5JWVtoCvpC07EuLJydYLvcEuGEaTyU=QHB00Xw at mail.gmail.com> > Content-Type: text/plain; charset=UTF-8 > > This is another Ebay item which seems to be identical : > http://www.ebay.com/itm/DEC-H219B-16K-x-12-Core-Memory-Stack-Board-Flip-Chi… > . > > Also indicate PDP8/a system core mem, MM8-AB. > > 2014-11-12 8:41 GMT+01:00 Mattis Lind <mattislind at gmail.com>: > >> Looking at page 3-17 of >> http://bitsavers.informatik.uni-stuttgart.de/pdf/dec/pdp8/pdp8a/EK-8A001-OP… >> shows that it is as far as I can see identical to the 16 k MM8-AB. >> >> 2014-11-12 8:13 GMT+01:00 Paul Anderson <useddec at gmail.com>: >> >>> pic #4 shows a DEC core sticker on the back, but out of focus. >>> >>> On Wed, Nov 12, 2014 at 1:09 AM, jwsmobile <jws at jwsss.com> wrote: >>> >>> > >>> > On 11/11/2014 9:12 PM, Jon Elson wrote: >>> > >>> >> On 11/11/2014 09:18 PM, Johnny Billquist wrote: >>> >> >>> >>> On 2014-11-12 04:00, Jon Elson wrote: >>> >>> >>> >>>> On 11/11/2014 07:33 PM, jwsmobile wrote: >>> >>>> >>> >>>>> I can't tell for sure, but this auction may be for PDP8 core >>> board. >>> >>>>> >>> >>>>> KT-KEARNEY-TRECKER-ASSY-KT83-0933-KT84-020-SYSTEM-BOARD >>> >>>>> >>> >>>>> http://www.ebay.com/itm/181565552717 >>> >>>>> >>> >>>>> >>> >>>> >>> >>> The fact that the board have four edge connectors and not six >>> totally >>> >>> excludes PDP-11. >>> >>> >>> >> The first and last picture of the ebay listing above clearly has SIX >>> edge >>> >> connectors. >>> >> And, in fact, a number of PDP-11 peripheral boards had only 4 >>> connectors. >>> >> CPU boards and memory did usually have 6. >>> >> >>> >> Jon >>> >> >>> >> >>> >> I based my PDP8 on googling and looking for comments about the >>> processor >>> > type. There was a history page which said they used PDP8s in their >>> > designs. I know that the 6 up is more common for PDP11, but wanted >>> to >>> > throw it out there. I figured a core board of the right variety for >>> $195 >>> > might be a steal since the seller didn't list it to be on the DEC >>> hardware >>> > searches on Ebay. >>> > >>> > Thanks for Al's comment on the 6800 board. I see about half of all >>> photos >>> > being crap these days on ebay. I was crossing fingers it would be a >>> design >>> > that started out as an actual dec, and maybe had a small board built >>> up >>> > with a Harris pdp processor on it. I know that is a really long >>> shot, >>> but >>> > not impossible. >>> > >>> > thanks for the comments. >>> > Jim >>> > >>> >> >> >

11 years, 7 months

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DECwriter Correspondent (LA12) mechanical issue...

by derschjo＠gmail.com

Hi all -- Got myself a nice looking DECwriter Correspondent (AKA the LA12). It's having a bit of trouble moving the carriage assembly and I can't find a service manual for this thing. (It's similar in some respects to the DECwriter IV, but the mechanical parts appear to be fairly different.) The carriage assembly (print head, ribbon) is carried from one end of the platen to the other via a cable attached to a servo motor on one end and a pulley on the other; in the middle of this cable is a small metal ball -- this ball is (as far as I can tell) meant to sit in a small "cup" on the underside of the carriage and when the cable moves, the ball pulls the carriage along. I'm assuming this was done this way since the Correspondent is meant to be portable, and allowing the carriage to break free of the pulley mechanism would probably reduce damage in the case of a sudden shock (like getting dropped.) So far so good -- unfortunately the vast majority of the time, the ball leaves the carriage behind (especially on carriage return) and I can't quite figure out what's out of tolerance -- the carriage appears to move smoothly, nothing is bent out of shape or broken as far as I can tell, and there's plenty of tension in the cable. There's also not much to adjust here so I'm kind of puzzled. I've put up a few pictures (and a short video demonstrating the problem) with the print head/ribbon removed here: http://yahozna.dyndns.org/scratch/la12 Anyone ever worked on one of these before? Any ideas? Thanks as always, Josh

11 years, 7 months

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ccmp server

by jwest＠classiccmp.org

FTP has been re-activated on the new server, so those who have websites/content on the machine can again get in via ftp to add/remove/change content. J

11 years, 7 months

1
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assistance sought with mailman

by jwest＠classiccmp.org

Greetings folks. The additional drive was added to ccmp server last night. No problems encountered other than for some oddball reason xenserver added it as drive 4 instead of drive 3. It thinks drive 3 slot is in use but it's not. I can live with ada3p1 ;) I've got my hands full with some work on bitsavers as well as ongoing client workload, and some rough edges still remain on the mailman "two views of the same list but joined at the hip" thing. That needs to be addressed quickly before the current/new archives get incoherent but I'm short on available time. So, is there anyone that is *very* well versed in mailman "under the hood" that can do a one-time assist with the following: 1) Get the "two views of the same list but joined at the hip" working the way it previously was. I have some details/recollections on this, but not complete "do this" instructions. 2) There has been an ongoing issue for years with the "forgot password" emails and/or the new subscriber email verification not working right. 3) Please for the love of god figure out why every single post to the list gets me a "bounce rejection" notice to my mailbox and stop it. 4) Integrate multiple fragments (I have several, if that's not complete other listmembers have mentioned they can supply any missing fragments) of the list archives into one archive that is complete. FYI - when rebuilding the server a couple weeks ago, I switched from sendmail to postfix, so a passing familiarity with postfix would be helpful as well in your endeavors above. The OS is FreeBSD r10 p11. If anyone is versed in the above and has a bit of time to spearhead the above tasks, please email me off-list. Also - once the archives are cleaned up, two other folks have volunteered to get archive searches to be "much improved". Thanks!! J

11 years, 7 months

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LINC archives

by j＠ckrubin.us

Here's a collection of LINC material, produced in conjunction with the LINC reunion in St. Louis a few years back - http://tinyurl.com/LINC-StLouis . Jack

11 years, 7 months

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List downtime.

by pontus＠Update.UU.SE

I'm back! (if anyone should care :-) I just resubscribed. Thanks to those who worked to get the list back online. I assume Jay. Big thanks. /P

11 years, 7 months

1
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Kearney & Trecker Core memory, may be PDP8

by jnc＠mercury.lcs.mit.edu

> From: Paul Anderson > The first board is definitely a DEC core board. If it will help anyone > I can pull a MM8-A and MM11-D and compare them to the pic to see which. That would be really useful. If I had to bet, I'd go with the 8: DEC SPC/MUD memory boards often have CA1 jumpered to CB1 (NPG), and I don't see that here. And the way CC1 is ganged to CF1 to CT1 is very odd - CC1 is Parity A in an SPC/MUD slot. (Yes, it could be for a specially wired system unit - but those don't usually use hex cards.) And then there are a number of different kinds of component (e.g. the transistors in the cans, TO-18 I think?) which seem to be in multiples of 12. Too bad there's no picture of the edge of the handles to give us an M-number! Noel

11 years, 7 months

2
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IBM 5151 (MDA display) - common faults / gotchas?

by jules.richardson99＠gmail.com

So, my local bookstore guy has an IBM 5151 monitor for sale, which is surprising because: a) I haven't seen *any* vintage IBM PC kit locally in the last 8 years, b) I picked up a 5160 with an MDA display adapter but non-IBM monitor from John over in Duluth a few weeks ago, and I was thinking what a shame it was that it didn't have the original IBM screen. So, it's almost like it's meant to be, or something... Of course working condition is unknown, so before I commit to it, are there any common showstoppers with these displays (failed CRT, yoke windings, LOPT etc.) - or are whatever faults that may be typical with them all in components that are still available? (I'm kicking myself a bit because he said I was welcome to bring it home over the weekend to try it out and then bring it back if I decided I didn't want it - I just couldn't remember at the time if the 5151 was the MDA display or something else, but with hindsight I probably should have just taken it regardless!) cheers Jules

11 years, 7 months

10
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Whitesmith C install

by quapla＠xs4all.nl

I'm trying to install the Whitesmiths C compiler under RSX11M using FLX (using the Whiteshmiths c compiler distribution tape V2.25 from bitsavers). Alas, 'FLX' says the tape has zero files and directories, while a dump under Linux shows definitely some contents. I tried both the simh & tpc format, no luck here yet. Am I missing something? The command I used is 'flx /rs=ms0:[*,*]/do' Thanks, Ed -- Dit is een HTML vrije email / This is an HTML free email. Zeg NEE tegen de 'slimme' meter.

11 years, 7 months

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server bounce

by jwest＠classiccmp.org

There's about an 80% chance that I will reboot the classiccmp server tonight to add another 300gb drive to it. Total expected downtime would be about 30 seconds. If I do wind up doing it tonight, I'd expect it to occur vaguely around 8:30pm-ish CST. J

11 years, 7 months

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ADDS 4000/260 keyboard connector

by jules.richardson99＠gmail.com

Longest of long shots, but does anyone happen to know the keyboard connector pinout on an ADDS 4000/260 terminal? I have such a terminal here, and it has a 6-pin RJxx-type socket, but the keyboard which came with it would appear to be for something else, and has a 4-pin RJxx plug (I'm not sure of the actual RJ designations, but they're physically different, albeit close - the keyboard one fits in the terminal's 6-way socket, but is too loose to make contact on its 4 pins) However, the manual for the terminal mentions supporting a PC keyboard, so it's possible that a standard PS/2 keyboard with the PS/2 connector lopped off and replaced with a suitable RJxx connector would work - i.e. the clocking method and scancodes are identical - if I knew the pinout (it's also possible that the same is true of the keyboard that came with it - the physical layout's identical to a PC, but with the addition of a 'select' key) cheers Jules

11 years, 7 months

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Tektronix Microlab I?

by nw＠retroComputingTasmania.com

I found this item on eBay: a Tektronix Microlab I with 8086 personality module, but can't seem to find much about what capabilities it provided. It doesn't seem to be in the same league as the Fluke 9000 series (9010A etc) so what could it do? Was it simply a way of testing out different microprocessors (like a SBC with plugin CPUs)? http://www.ebay.com.au/itm/380885770121

11 years, 7 months

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PDP-11/23 Debugging

by jnc＠mercury.lcs.mit.edu

> From: Ben Sinclair > Then, in between trying a few things (but without touching the > hardware), the machine seemed to get very flaky. > ... > I tried removing the RLV11 boards, returning the machine to it's former > state, but I have the same issue. This is a total _guess_, but... I've recently been working with some 11/23's I just bought, and I too had similar flakies appear mysteriously with one of them. I'm not sure exactly which of the below finally cured them, but you can try the following things (one of which finally did it for me - after sitting for a long time, the connections can possibly be slightly flaky): - re-seat all the cards in the backplane - re-seat the chips on the CPU card (take them out _very_ carefully, slowly levering from all 4 corners - they are brittle, and you can fracture the carrier if you get too aggressive) - re-seat all the jumpers on the CPU card I also discovered and repaired at least two cold-solder joints (one was one of the pins for W1, the master clock control - the pin was actually loose when I wiggled it). Cold solder joints are pretty insidious - they can work fine for a while, and then start to give problems. Do you have more than one memory card that you can swap in/around? That might be it, too. Noel

11 years, 7 months

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Netronics Phoneme generator info

by jules.richardson99＠gmail.com

Random find in my local book store's pile of scrap electronics heading for recycling - a Netronics Phoneme speech synthesizer. IC dates all around mid-1982. I just have the board, no case or anything, but it appears to be reasonably self-contained: there's a connector for PSU, a phono which I'm guessing is speaker out, pots for volume and pitch, and a DB-25 connector. The DB-25 only has pins 1,2,3,7 & 20 in the socket, so I'm assuming it's RS-232. Does anyone know anything about these? Assuming it still works (it looks like it just expects 6-9VAC or thereabouts on the PSU connector), is the control protocol documented anywhere? DIP switch settings? (there are 8 on the board, labelled BSY, 3, 2, /C, /C, B, P, C) Looking at the PCB traces, it appears to allow data input by either pin 2 or 3 (dictated by the '2' and '3' DIP switch settings), but there's no data sent out down the serial line, so communication is write-only. I suppose it's possible that I hook up a terminal and (assuming that I have the line parameters right) start typing English, but it's probably not that simple ;) cheers Jules

11 years, 7 months

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TU58 was: VAX 11/730 Documentation

by shadoooo＠gmail.com

What about the PVC bands to replace the original in the cassette? Unfortunately any reference here in cctech older archives has been lost... Thanks Andrea

11 years, 7 months

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Vince Briel computers

by asc135＠gmail.com

David Griffith <dgriffi at cs.csubak.edu> wrote: > He seems to come and go. I ordered a mini-altair from him in September of 2013 and got it around a year later. I've run into this too many times over the years with someone who is running a side business. Demand greatly outstrips their work process and the owner is just inclined to keep stringing along the customers with excuses, if any communications at all. Years ago I ordered a lot of equipment from "The TRS-80 Recycler." It took over a year and dozens of really lame excuses before I received it all. Then I saw similar things happen to people who prepaid for those next generation IMSAIs, but they never got theirs. Same thing with a supplier or two in my other hobby, reel-to-reel tape recorders. If I was in that situation I'd probably just stop accepting new orders (i.e. cash) but accept backorders. Tell the buyer honestly how long it might take and charge the money only the day it ships. But often these guys *need* the money and keep accepting it, which is just a wrong thing to do. Amardeep

11 years, 7 months

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TU58

by anders＠abc80.net

> Message: 9 > Date: Mon, 10 Nov 2014 10:41:03 -0600 > From: Chris Elmquist <chrise at pobox.com> > To: "General Discussion: On-Topic Posts" <cctech at classiccmp.org> > Subject: Re: TU58 > Message-ID: <20141110164103.GL7672 at n0jcf.net> > Content-Type: text/plain; charset=us-ascii > > On Monday (11/10/2014 at 06:25AM -0800), Al Kossow wrote: >> On 11/9/14 11:44 PM, Simon Claessen wrote: >> >> >I have been thinking about making an Arduino sketch to generate the >> blocks for a new tape >> >> Norprine tubing works great as a replacement >> http://www.usplastic.com/catalog/item.aspx?itemid=104207&catid=664 >> >> The tricky part is cutting it. >> >> Thanks to Brad Parker for telling me about it. > > What's the correct ID to choose? > > I assume you then slip it over the aluminum hub after cleaning all the > old roller residue from it? Do you glue the new tubing to the hub? > > Maybe we could get someone to cut proper sized chunks of this tubing > with a laser cutter of some sort so that we have accurate dimensions > with a clean edge? > > Chris > -- > Chris Elmquist > I'll guess: no 55134, 3/8" ID x 1/2" OD x 1/16" based on a tip in an another forum. I wander if it could be possible to cut in a lathe if its put on a temporary hub and cooled down with cooling spray. I'll try to find a seller of this tube on the European side of the ocean. The one that is refereed to above doesn't seams to ship over seas. /Anders

11 years, 7 months

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VAX 11/730 Documentation

by shadoooo＠gmail.com

Hello, > I haven't booted my machine up yet, because it hasn't been able to read any of its console tapes. I have too a lot of tapes, complete and uncomplete sets of software installation tapes, plus two/three console versions and some with unknown content. The problem is, many of them suffer from sticky rubber on tape (if you try to move the rubber leader, it will create blank spots on tape, removing the magnetic oxide substrate). Other have a broken band. I read somewhere around, it is possible to detach the rubber band using hot air, and replace it with some sort of PVC strings. I would need a lot of time to try something... but the bigger problem is not this... I don't have a TU58 to be used on the desk to try to read the tapes, and even better to assembl?e a new firmware allowing to format blank tapes. I'm trying to buy some piece of hardware since a lot of time... no luck so far. If anybody has a TU58, or parts, please let me know. Andrea

11 years, 7 months

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list back up

by jwest＠classiccmp.org

The classiccmp server and it's backups were on a temporary san that hit a bug and rebooted itself. Needless to say, dropping iscsi to a hypervisor is not a good thing. The classiccmp vm thus rebooted itself, ran fsck, and (as best as I can tell) the only thing corrupted was the cctalk and cctech config.pck files (which contain the list settings and membership). The only backup had the same corruption on it, because it ran the backup before I noticed the problem. Anyways. Knowing the recovery wouldn't be quick/easy anyways, I took the opportunity to just build a new classiccmp server VM from scratch. The latest OS, patches, dependencies, libraries, and ports. This new VM is on the new production san so there's a pretty fair amount of additional disk space thrown at classiccmp (and thus bitsavers). It's always amazing when I revisit this just how many packages/services are on that machine that a reload from scratch requires. It's been a busy few days/nights. Things you should know: 1> The membership list for each list was recovered thanks to the hard work of DBoone. He processed the last few days of maillogs to get the subscriber lists back. THANK YOU D. 2> Given how we had to do #1, it is possible that a few folks that had subscriptions weren't automatically re-subscribed (someone who set their membership on 'no email' could be one example). Those folks will notice and just resubscribe. 3> Given the very bizarre way we had the cctalk and cctech lists "joined at the hip", I do not recall the magic we did to get that working properly. I am aware that posts from one probably aren't being redirected to the other like it used to (if at all). I'm working on refiguring that out, and any suggestions (offlist) would be most appreciated. 4> Given that I had to recreate the lists configurations from scratch, I'm pretty certain that I have some settings different than used to be. If you find anything different that matters, let me know. 5> The "new" classiccmp server is currently hosting the mailing lists, the classiccmp.org website, plus all websites that are underneath classiccmp.org (ex. www.classiccmp.org/hp , www.classiccmp.org/cpmarchives , etc.). Thus, you may notice a different ip address and hostname on the server. The new name/IP will stick till any future rebuilds. 6> The "old" classiccmp server is still up, and is hosting all the websites that have their own domain name. Time permitting, I'll be migrating those one at a time to the new server. During that time period - however long it takes - ftp and rsyncd will not be available to prevent loosing changes when cutover occurs. 7> I do not recall who all the folks were that were helping review/gate posts between cctalk/cctech. If you were one of those folks, please let me know asap off-list so I can get you re-added. 8> For people who have websites hosted on the classiccmp server, be aware the new server is running mysql56, php56, and apache24 (with mod_itk). Before your website is moved, let me know if you're aware of any breakage that using those new versions may cause. I'd also prefer to transform any myisam databases to innodb unless you're aware of an issue that may cause. 9> Please do not post to the list or email me directly about "hey, the archives are gone!". They have been preserved, and time permitting they will get imported back into the "new" mailing list (along with the missing 199x bits that were recently mentioned). Rumor has it that someone has volunteered to improve the archive search mechanism in the not too distant future. 10> Many people have asked me over the past year or so to host their classiccmp-related website, and I pushed them off due to the lack of disk space. That is no longer an issue so if you're one of the people wanting that (and still do), now is the time to get back in touch with me. As always, we'll host any classiccmp-related website free of charge. 11> Within the next 30 days (at most) we'll be adding the classiccmp server to our CDN service. The advantage: I would expect to be able to remove any/all bandwidth limits previously in place and folks will be able to download files from the bitsavers master very quickly and your classiccmp-hosted websites will be a lot more snappy. The downside is, you'll have to either be ok with it taking a while for new/changed content on your site to be visible world-wide, or you'll need to take a look at the api (or via a CDN website login) to invalidate the cache when you change something. In most cases, this can be easily automated. 12> During the mailing list outage, all websites and bitsavers were still up. It was just the mailing lists that were affected. I'm sure there's more that I've forgotten. But.. Enjoy! Best, J

11 years, 7 months

10
10
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Recovery CDs for Thinkpad 2647-44U (T-20)?

by jrr＠flippers.com

Anyone have one of these sets (2 or 4 CDs) for the old IBM Thinkpad? I have a nice old timer here that I want to use for some older applications (ancient EPROM programmer) and this would work nicely if I could find the drivers. At the moment I can only find invalid torrents or what certainly looks like malware 'drivers' to download. IBM off-loaded everything to Lenovo and there is nothing on their site that I could find for these legacy machines. Archive.org has the support site archived, but not the download files... eg: https://web.archive.org/web/20060713020434/http://www-307.ibm.com/pc/suppor… Seems a shame to recycle a perfectly good computer just because one can't get it running on all cylinders! Thanks! John :-#)#

11 years, 7 months

3
3
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Paging Rob Blessin from Black Hole, Inc

by laurens＠daemon.be

Does anyone know whether he's still reachable somehow? He doesn't seem to be answering emails?

11 years, 7 months

2
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