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

by COURYHOUSE＠aol.com

for some reason I remember using a piece of plastic tubing? Ed# _www.smecc.org_ (http://www.smecc.org) In a message dated 7/20/2015 11:13:32 A.M. US Mountain Standard Time, jwest at classiccmp.org writes: What I'd really like, is one of those "light bulb replacement tools" for the 2100 :) As anyone knows who has replaced them before, it's a bit of a frustrating pain to get them inserted just right given clearences and such :) I'm not positive, but I seem to recall back in foggy memory that there was actually a tool for this. J

10 years, 11 months

1
0
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AlphaServer 4100 CPU fan

by binarydinosaurs＠gmail.com

Folks, I didn't realise there'd been a clasiccmp server meltdown, wondered why I wasn't getting mails :) We still have a few AS4100s out there in the field and CPU fans are becoming scarce, so being canny we sourced some *almost* identical replacements to no avail. Original spec for the fan is 12V 0.17A, our replacements are 12V 0.18A and the console still reports them as failed. I've sanity checked by using a processor board with a good fan and still nothing. Could the 0.01A cause THAT much of an issue? The wiring is a good 3" longer too but I didn't think that would cause problems either. Any help appreciated. -- adrian/witchy Owner of Binary Dinosaurs, the UK's biggest home computer collection? www.binarydinosaurs.co.uk

10 years, 11 months

4
4
0 0

moving cleanout - partial DECmate I / VT278

by COURYHOUSE＠aol.com

what is condition of the mod 100 trs 80? more concerned abut visual as it would go in a tools of the journalist over at the univ or if anyone else has one they could toss in a box and send this way. They were one of the early "issued items" to some reporters to phone home stories. When about it... the 'tools of the journalist' throughout the ages makes for a pretty interesting display especially when you take in to account print, radio and television. the dec may be to much to box and mess with and I certainly can't make the road trip although it has to be better than our 104 degree weather here! Ed# www.smecc.org In a message dated 7/20/2015 12:22:27 A.M. US Mountain Standard Time, hilpert at cs.ubc.ca writes: On 2015-Jul-19, at 10:45 PM, couryhouse wrote: > What are you going to do with it?Looking. For a wt78 but.... this fell in our lap.... While I did expect DEC-anything would attract more interest, I was figuring people would have read my message from earlier in the day, here's the extract/backgrounder: So my house sold yesterday after < 3 days on the market (the market here is nuts). I have about two months to move, so a bunch of stuff has to disappear. Location is the Vancouver, BC, Canada region (Port Moody more precisely). Most of this stuff is larger and I'm not going to have a lot of time to pack & ship, so local pickup is expected. If there is competition for something I guess it goes to the one willing to offer the greater number of bucks, otherwise items are free as the alternative destination is recycling/scrap. Any bucks involved are not because I expect a lot (or anything), but just to sort out who 'values' it the most if there is multiple interest in an item. I reserve the right to be whimsical in any decision. At this point three (distant) parties have inquired about this item. No, I don't want to scrap it, but I can't make promises for shipping something this size at this time. If someone is "really interested" (you have the other bits for example), let me know. Shipping just the CPU board may be another option. (There has been no interest in all the other stuff at this point except the TRS-80 M100 and a question about the XT-clone.) > -------- Original message -------- > From: Brent Hilpert <hilpert at cs.ubc.ca> > Date: 07/19/2015 9:29 PM (GMT-07:00) > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > Subject: Re: moving cleanout - partial DECmate I / VT278 > > Further to my earlier message today, something else to go: > > DECmate I / VT278 monitor & CPU > > This is the VT100 monitor/housing with the 6120-PDP8-microproc-based CPU board in one of the logic slots. > Sadly, missing the keyboard and floppies unit, so it's not complete. > > IIRC, I faked a keyboard-present signal at the keyboard-jack some time ago and got it to produce some boot text on the screen. > > See for example: http://so-much-stuff.com/pdp8/decmateI/decmateI.php > > . . found my notes about it from 2011: > > ------------------------------ > > DEC DECMate VT278-AC > > 1983 > > System: > > ? LSI PDP-8 in VT100 case. > ? 6120 microprocessor (D1-6120-9 8) > ? 6 * SIP memory modules w 4 chips each (21-17559-AA / 8252 DP) > ? 2 * 6402 (UART) > ? 2 * 6121 (PIO) > ? SND 5027 D (video controller) > > Pros & Cons: > > ? CON: Missing disk drive. > ? CON: Missing keyboard. > > 2011 Jul: Powered up. PWR-OK and CPU-OK LEDs lit, CRT filament lit. No raster. Schematic obtained from bitsavers. No video or sync signals from processor board to monitor board. CG CHAR CLK to CRT Controller chip is present (1.5MHz), but no sync signals out from CRT Controller. ROM, CPU, CRTC socketed chips rocked for contact, no change. CRT Controller may not be getting initialised in initial ROM boot process. > > Connecting ring (data) to tip (+12V) on keyboard connector after power-up brings up SET-UP message and flashing cursor after several seconds. > > ------------------------------ >

10 years, 11 months

1
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moving cleanout - partial DECmate I / VT278

by couryhouse＠aol.com

What are you going to do with it?Looking. For a wt78 but.... this fell in our lap.... Sent from my Verizon Wireless 4G LTE smartphone -------- Original message -------- From: Brent Hilpert <hilpert at cs.ubc.ca> Date: 07/19/2015 9:29 PM (GMT-07:00) To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: Re: moving cleanout - partial DECmate I / VT278 Further to my earlier message today, something else to go: DECmate I / VT278 monitor & CPU This is the VT100 monitor/housing with the 6120-PDP8-microproc-based CPU board in one of the logic slots. Sadly, missing the keyboard and floppies unit, so it's not complete. IIRC, I faked a keyboard-present signal at the keyboard-jack some time ago and got it to produce some boot text on the screen. See for example:? http://so-much-stuff.com/pdp8/decmateI/decmateI.php . . found my notes about it from 2011: ------------------------------ DEC DECMate VT278-AC 1983 System: ? LSI PDP-8 in VT100 case. ? 6120 microprocessor (D1-6120-9 8) ? 6 * SIP memory modules w 4 chips each (21-17559-AA / 8252 DP) ? 2 * 6402 (UART) ? 2 * 6121 (PIO) ? SND 5027 D (video controller) Pros & Cons: ? CON: Missing disk drive. ? CON: Missing keyboard. 2011 Jul: Powered up. PWR-OK and CPU-OK LEDs lit, CRT filament lit. No raster. Schematic obtained from bitsavers. No video or sync signals from processor board to monitor board. CG CHAR CLK to CRT Controller chip is present (1.5MHz), but no sync signals out from CRT Controller. ROM, CPU, CRTC socketed chips rocked for contact, no change. CRT Controller may not be getting initialised in initial ROM boot process. Connecting ring (data) to tip (+12V) on keyboard connector after power-up brings up SET-UP message and flashing cursor after several seconds. ------------------------------

10 years, 11 months

2
1
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Multibus arbiter design

by spacewar＠gmail.com

Is anyone aware of any published detailed designs of Multibus arbitration circuitry, NOT using the Intel bus arbiter chips (e.g., 8218, 8219, 8289, 82289)? I know various vendors making Multibus CPU cards for non-Intel CPUs (e.g., 68K or NS 32K) sometimes designed their own arbiters out of TTL and/or PALs, but I haven't found any schematics. The only thing I've found so far is an application note "A Multibus Arbiter Design for 10 MHz Processors" in the 1988 AMD PAL Device Handbook, but I'd like to see other examples. I'm considering designing a Multibus I/O card that needs to be a bus master, and while an 8289 or 82C89 would do what I want, they're relatively hard to find and expensive, so I'd rather just do it in my FPGA, with suitable buffering to meet the Multibus electrical specs. It appears that the inner workings of the Intel 8289 arbiter are documented in US patent 4,257,095. The Intel MDS-800 circa 1975 used a bunch of TTL, but it was pretty tightly intertwined with 8080-specific logic, and since the MDS-800 predated the Multibus spec and has a few obvious differences from it, I don't think it serves as a particularly good bus arbiter design example.

10 years, 11 months

3
6
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PDP 11 gear finally moved

by cube1＠charter.net

Well, all I can say is that my experience differs. I have had newer capacitors fail, and old ones, too, of course, but nothing points to wholesale replacement as a cost or time effective strategy, especially on something like an Altair. FWIW, I don't run my vintage machines all that often. Of course reforming a bad capacitor, whatever the failure mode, is going to be useless. Tothwolf <tothwolf at concentric.net> wrote: >On Fri, 17 Jul 2015, Jay Jaeger wrote: >> On 7/17/2015 1:33 PM, Rich Alderson wrote: >> >>>> It is generally a good idea to re-form electrolytic capacitors in >>>> power supplies, and to bench check the power supplies (under some kind >>>> of load) before actually applying power to the whole unit. >>> >>> It is always a good idea to replace electrolytic capacitors in power >>> supplies. The rest of the advice is sound. >>> >> Replace - no, I don't agree - especially not for those of us who don't >> have the kind of budget that your organization has. In my experience, >> for equipment of this quality and vintage, 95% or more of the time an >> hour to a few hours of re-forming is all that is necessary - and as Tony >> has pointed out, even that is not often really necessary. > >Replace - yes, *especially* if you don't have a big budget. Aluminum >electrolytic capacitors are CHEAP and easy to obtain. Replacement >semiconductors by comparison are expensive and can be quite difficult to >find. > >While it might be worthwhile reforming a special purpose NOS electrolytic >that isn't much older than 15-20 years old, reforming 20-30 year old >heavily used (read: past usable service life; evaporation of the >electrolyte, corrosion of the foils and especially foil to terminal >junctions, etc) is a complete and total waste of time. > >Ironically, 20-30 years ago this same mindset used to persist with people >who collected vacuum tube (valve) based radios and television, however >that attitude no longer seems to be present in those communities today >(not worth risking an irreplaceable transformer or inductor over >$5.00-$10.00 worth of aluminum electrolytics).

10 years, 11 months

1
0
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moving cleanout - IBM XT(s), assorted macs, green-screen NTSC monitors, TRS-80 types, etc

by hilpert＠cs.ubc.ca

So my house sold yesterday after < 3 days on the market (the market here is nuts). I have about two months to move, so a bunch of stuff has to disappear. Location is the Vancouver, BC, Canada region (Port Moody more precisely). Most of this stuff is larger and I'm not going to have a lot of time to pack & ship, so local pickup is expected. If there is competition for something I guess it goes to the one willing to offer the greater number of bucks, otherwise items are free as the alternative destination is recycling/scrap. Any bucks involved are not because I expect a lot (or anything), but just to sort out who 'values' it the most if there is multiple interest in an item. I reserve the right to be whimsical in any decision. The following is 'off-the-top-of-my-head', I haven't examined this stuff in awhile. If someone would like a photo of something, let me know. Additional stuff may filter out in the near future. ======== XTs IBM 5160 (XT) - CPU with one floppy and hard drive, but the hard drive is flaky (booted from floppy last time I checked) - clicky-keyboard with special coloured keycaps for some video-editing system, still functions as normal keyboard, missing one keycap (whatever is immed. below the RETURN key) - IBM 5151 green-phosphor monitor XT-class clone labeled "IDM Research X88 Turbo" not readily bootable, IIRC the 'multi-function' board was damaged by battery leakage, the hard drive is flaky on this one too, IIRC might be consider for parts/modules or as a base to complete an XT - with keyboard & amber-phosphor monitor ======== Macs Mac Quadra 605 / LC475 68040 pizza box - with ADB keyboard and mouse - no monitor Mac Performa 5300CD beige all-in-one, kind of the all-in-one predecessor to the original iMac - with ADB keyboard and mouse Mac PowerPC tower beige G3 - with ADB keyboard and mouse - no monitor yes, bland and unexciting, the redeeming point is it's kind of a "multi-medium machine": zip drive floppy drive CD-ROM drive SCSI bus IDE bus RS-232 USB ethernet some video/audio IO original iMac Rev A 'the very first iMac model', bondi-blue of course - complete with puck mouse, the proper keyboard and the proper 'clear' power cable - original Mac OS8 install media and box I think it has 40 or 60MB of memory but could really do with more - a couple of memory sticks were zapped as I was swapping them testing another machine. I'm not completely sure how many ADB keyboard/mouse sets there are, at least 2. ======== NTSC monitors 4 green-phosphor 12" NTSC monitors. I think 2 of them will go and I may hang on to 2. Typically used with late-70s / early-80's micros. I have to hang on to one of them to go with my SWTPC CT-1024 terminal, for example. One of them (NEC) was originally sold in a package with and used with an Apple II. ======== TRS-80s 2 or 3 TRS-80 CoCos TRS-80 Model 100 the laptop TRS-80 portable/luggable I'd have to check/confirm on this one, it was at the radio museum, if it's there it should go. ======== bonus circa-1980 colour TV, 13-14" If you really want the authentic (i.e. awful) RF-modulated-display experience from your vintage 80's micro, without the mass of a 17,19,21" CRT, this could be it. ================================= =================================

10 years, 11 months

2
2
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Linear Power Supply (Conversion Equipment Corp) from a basic four 510

by ad＠ardiehl.de

The one from my 510 does not supply the main +5V, all the other voltages are present. Does someone have a schematic for that one, would me more easy. I have uploaded pictures here: http://basicfour.de/mai510-PSU/small/ Thanks a lot Armin

10 years, 11 months

3
6
0 0

MFM reader emulator

by djg＠pdp8online.com

I'm doing another run of boards. The description of the board changes and the expected price are at: http://www.pdp8online.com/mfm/board_revb.shtml If you desire any please respond by email not to list with 1) How many bare boards you wish. I will assume production boards unless you state how many of the ENIG boards available now you wish. Production boards may be a monthish. 2) If you wish the surface mount chips installed on the bare boards. 3) How many fully assembled boards you wish. The PCB is included. 4) For fully assembled boards do you wish a BeagleBone Black (BBB) provided with it. 5) Any questions you have.

10 years, 11 months

1
0
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Front Panels Sample layout.

by rodsmallwood52＠btinternet.com

Hi Guys! Further to my previous email. If anybody would like to see the artwork I can send you a copy. Its in *.svg format. Regards Rod

10 years, 11 months

4
10
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Reproducing old machines with newer technology

by jnc＠mercury.lcs.mit.edu

> From: Paul Koning >> I have a hard time coming up with other machines with the same level >> of impact/influence, in terms of CPU internal architecture. Maybe >> Atlas, or the 801? > CDC 6600, of course. I guess I don't know the 6600 that well (I have the book, and have skimmed it in the past). What are the novel features in the 6600 that were widely adopted by other machines? (I listed the Atlas because of paging, and the 801 because of RISC.) Noel

10 years, 11 months

10
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PDP-12 at the RICM (Michael Thompson)

by michael.99.thompson＠gmail.com

We received more documentation from the donor last week so we were able to run the processor LINC instruction tests. The new docs are already scanned and on Bitsavers. The LINC diags failed, but we quickly found the bad M160 flip-chip and now both LINC diags run OK. We continued debugging the "LGP GP=GPC PRESET" problem in the TC12 LINCtape controller in the PDP-12. After LOTS of signal chasing we eventually found that the timing track signals in the right TU56 tape head are open. I had the same problem with the TU56 in my PDP-8/e and the tape head is probably impossible to fix. -- Michael Thompson

10 years, 11 months

1
0
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Looking for keyboard for a BLIT / Teletype / AT&T terminal

by ian.finder＠gmail.com

Hi Folks, I need help hunting down an item. This is a keyboard that shipped with a few AT&T / Teletype terminals with a 6-pin RJ connector. I recently obtained a BLIT terminal and would like to find a keyboard (and mouse- the red lady bug one- if possible- but the keyboard is quite necessary) Also any advice on how to deal with screen rot would be appreciated. Thanks, - Ian

10 years, 11 months

2
1
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STSC APL*PLUS System for VAX VMS User's & Reference Manual

by mark＠wickensonline.co.uk

For those who expressed an interest in the STSC APL*PLUS manuals for VAX/VMS I happy to report they are now available from here: http://wickensonline.co.uk/static/files/scans/APL-Plus-System-for-the-VAX-V… http://wickensonline.co.uk/static/files/scans/APL-Plus-System-for-the-VAX-V… Apparently the free PC version is very similar to the VAX/VMS version so these manuals should be of direct use. You can run the PC version of APL*PLUS within DOSBox and it is available here: http://www.math.uwaterloo.ca/apl_archives/apl/apl-plus/ Regards, Mark.

10 years, 11 months

1
0
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MC68451 datasheet wanted

by spacewar＠gmail.com

Looking for an MC68451 datasheet (or scan). Most of the ones that turn up from the usual database sites are actually for the MC68450 DMA controller, which is entirely unrelated. The only one I found that is actually for the MC68451 was "Advance Information" from a databook, and did not include the pin grid (R or RC suffix) pinout. There was a "loose" (not in databook) datasheet that is more recent, labeled "Preliminary" rather than "Advance Information", and later versions of that include the pin grid pinout. Does anyone have that?

10 years, 11 months

3
2
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docs & sw wanted for Heurikon HK 68/ME-2 and HK 68/M10-3, Micro Memory Inc. MM-9000

by spacewar＠gmail.com

I've got one each of the Heurikon HK 68/ME-2 and HK 68/M10-3 multibus boards. There are brochures on bitsavers, but does anyone have documentation, schematics, or software for either of these? It also would be nice to get documentation, or at least switch and jumper settings, for the Micro Memory Inc. MM-9000 Multibus/iLBX RAM board. I have the 4MB version, using 144 256K DRAMs (includes parity), but there was apparently also a 1MB version using 64K DRAMs. Aside >from the DRAMs I expect the difference is in the jumper or switch settings.

10 years, 11 months

1
0
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OpenVMS Alpha V7.3

by scaron＠umich.edu

Anyone got an ISO handy? Trying to get my 3000/400 up; V7.0 firmware; and it does not like the OpenVMS V8.4 ISOs I got from HP ... I do have a valid Hobbyist license ... please chat with me off-list? Thanks, Sean

10 years, 11 months

5
11
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keys, motorola 88k system series 900

by emu＠e-bbes.com

With all this talking about keys ... Anybody know where to get a spare one for the system above? Cheers & thanks ...

10 years, 11 months

1
0
0 0

PDP8/e front panels A and B

by rodsmallwood52＠btinternet.com

Hi Guys! I now have prototype artwork for the two types of 8/e front panel. They differ only in the switch markings. They do both have the same extra (but cosmetic only) features over the first run. Regards Rod

10 years, 11 months

1
0
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Retrochallenge Update (was Re: How many use old browsers (e.g. =< Netscape 4 or IE 6) as their ONLY source of web content?)

by terry＠webweavers.co.nz

On Fri, Jul 3, 2015 at 10:26 AM, Terry Stewart <terry at webweavers.co.nz> wrote: > Hi, > > I'm engaged in a Retrochallenge project where I'm recoding my > classic-computers.org.nz site to make it suitable for mobile platforms. > I want to modernise the code as well, making it as close to HTML5 standard > as I can > > Since I did ask about this, some on this list might be interested in my progress with this project. The pages are still a long way from conforming to strict HTML5 standards but at least they are now all mobile-friendy. http://www.classic-computers.org.nz/blog/2015-06-29-recoding-classic-comput… Cheers Terry (Tez)

10 years, 11 months

2
1
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PDP-12 at the RICM

by michael.99.thompson＠gmail.com

The RICM Learning Lab was nice and cool today so we spent the afternoon chasing the "LGP GP=GPC PRESET" in the TC12 LINCtape controller. With a logic analyzer connected to lots of the TC12 signals were were able to chase down the signal that is causing the fault. We are now not sure if the signal behavior we observed is the correct behavior, and there is a fault elsewhere. More debugging time and more studying of the documentation is required. -- Michael Thompson

10 years, 11 months

22
96
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Wang Model 370

by earl＠baugh.org

Howdy, Went on a rescue last night and while there were three machines I knew of (a PDP-11 that I'll give more details on later, haven't looked at boards, etc, since it was part of a Particle Measuring System, an HP 85-ish machine and a slightly later HP machine) there was one thing that I hadn't known about... (aside from the very cool old GE 'scope that the guy is keeping... ) A Wang Model 370 Calculating System with a Model 372 Data Storage System. Gotta say this is the oldest thing I've picked up (1967 it came out). No idea if it powers up or not... Definitely needs a cleaning (basement, fairly dusty unit) but before I did anything, was wondering if there are any experts out there that have worked on one of these before who'd be willing to share any helpful hints on verifying this is working... Thanks... EarltheSquirrel

10 years, 11 months

3
2
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Time to dig out some of my DEC XX2247 keys

by aek＠bitsavers.org

http://www.ebay.com/itm/281749697289

10 years, 11 months

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Time to dig out some of my DEC XX2247 keys

by jnc＠mercury.lcs.mit.edu

> From: tony duell > The problem comes if the blank is 'restricted'. ... > I would be surprised if the blank for the 11/05/GT40 key was restricted. It's not; IYWR I recently had a bunch of 11/05 keys made for people here, and it just used a standard blank. (In fact, there were several different ones that worked; it's a very short key, and there are different length blanks.) Noel

10 years, 11 months

1
0
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Time to dig out some of my DEC XX2247 keys

by COURYHOUSE＠aol.com

think I have a drawer of them somewhere... HP keys as well. Wonder how many 'buyers ' are out there!? ed# In a message dated 7/15/2015 10:50:33 P.M. US Mountain Standard Time, cclist at sydex.com writes: On 07/15/2015 09:50 PM, jwsmobile wrote: > If you found someone making the keys, then that is at variance with what > is going on in general, as I called several locksmiths and all of them > sing the same tune w/o prompting. The ACE way or the highway. Oh, I'll bet that there's someone in the far East who'd be more than happy to make you a bucketful. Or you can visit the World-Wide-Black-Market: http://www.bumpmylock.com/chicago-ace-tubular-lock-key-blank-137.html And even better, I suspect a locksmith may, for a fee, get you one of these: http://www.hpcworld.com/Print/pocket_cut-up/manual.pdf Or maybe there's a Chinese clone maker who'll sell you one. In these days of electronic key-cards and whatnot, an ordinary key can hardly be considered high tech security. --Chuck

10 years, 11 months

1
0
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Reproducing old machines with newer technology (Re: PDP-12 at the RICM)

by jnc＠mercury.lcs.mit.edu

> On 7/14/2015 7:36 PM, Jon Elson wrote: > On the system 360 CPUs, they did not use flip-flops like we are used > to, today. They used latches ... Since these were discrete transistor > implementations, a real flip-flop was too expensive, but a latch could > be implemented in about 6 transistors, I think. > The 11/45 used TTL ICs, so real FFs were available in that technology, > although they may have used latches as well. This confused me a bit, until I realized that you were using "latch" for what I think of as 'SR flip-flop', and "flip-flop" for 'D and JK flip-flops'. Guess that shows how long ago I did hardware... :-) To be a bit more detailed, on the 360's, were those latches 'simple' SR flops (i.e. un-gated), or were they gated? Noel

10 years, 11 months

3
2
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Off topic- shipping companies

by COURYHOUSE＠aol.com

ok and added item there is min size for the min price too... so if you can fit it in the footprint same charge probably as they were sending the palletized stuff as padded. I have had ties I needed some padded and there was still a min. amount of poundage open so I put palletized stuff on with the wrapped but that was because it would have cost the same for the padded without the palletized. rule if you send anything padded van all will be billed as padded van even if was a palate load of paint cans full of dog crap etc etc.... Ed# In a message dated 7/15/2015 7:08:18 P.M. US Mountain Standard Time, COURYHOUSE at aol.com writes: probably as they were sending the palletized stuff as padded. I have had ties I needed some padded and there was still a min. amount of poundage open so I put palletized stuff on with the wrapped but that was because it would have cost the same for the padded without the palletized. rule if you send anything padded van all will be billed as padded van even if was a palate load of paint cans full of dog crap etc etc.... Ed# In a message dated 7/15/2015 5:26:09 P.M. US Mountain Standard Time, useddec at gmail.com writes: I've used move it (CTS) since the 70s for padded van service and some freight. I need some pallets moved and they quoted me today what I thought was a rather high price. I've seen here and talked with people who talked of other freight forwarders and shipping companies but can't find them now. Any suggestions? I know prices vary with zip codes. Thanks, Paul

10 years, 11 months

1
0
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Off topic- shipping companies

by COURYHOUSE＠aol.com

probably as they were sending the palletized stuff as padded. I have had ties I needed some padded and there was still a min. amount of poundage open so I put palletized stuff on with the wrapped but that was because it would have cost the same for the padded without the palletized. rule if you send anything padded van all will be billed as padded van even if was a palate load of paint cans full of dog crap etc etc.... Ed# In a message dated 7/15/2015 5:26:09 P.M. US Mountain Standard Time, useddec at gmail.com writes: I've used move it (CTS) since the 70s for padded van service and some freight. I need some pallets moved and they quoted me today what I thought was a rather high price. I've seen here and talked with people who talked of other freight forwarders and shipping companies but can't find them now. Any suggestions? I know prices vary with zip codes. Thanks, Paul

10 years, 11 months

1
0
0 0

Off topic- shipping companies

by useddec＠gmail.com

I've used move it (CTS) since the 70s for padded van service and some freight. I need some pallets moved and they quoted me today what I thought was a rather high price. I've seen here and talked with people who talked of other freight forwarders and shipping companies but can't find them now. Any suggestions? I know prices vary with zip codes. Thanks, Paul

10 years, 11 months

2
1
0 0

Big Iron, S-100 & vintage micros for sale

by sellam＠vintagetech.com

I'm continuing to sell off most of my remaining collection. Here's what I have available at the moment: DEC TX78U Data Point Disc Drive Four Phase Systems IV90 Honeywell DPS-6 IBM 3420 x2 IBM 3803 IBM Scalable Power Parallel System 9076 Microdata Royal E Nuclear Data 9900 PDP 11/44 PDP 11/05 Plexus P75 Photos: http://vintagetech.com/sales/Big%20Iron/ Also: Friden 132 Heathkit H11 IMSAI 8080 Kennedy 1600 Polymorphic Systems POLY88 SWTPC 6800 UniCom 141P (yes, Intel 4004 based calculator) Photos and information: http://vintagetech.com/sales/ Also have: LNW Rsearch LNW80 + System Expansion Canon Cat + printer Olivetti Programma 101 (no photos yet but available upon request) I'm adding more to the inventory. If there's something you're looking for then please e-mail me, I might have it available. -- Sellam ibn Abraham VintageTech ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintagetech.com Whatsoever a man soweth, that shall he also reap. The truth is always simple. * * * NOTICE * * * Due to the insecure nature of the medium over which this message has been transmitted, no statement made in this writing may be considered reliable for any purpose either express or implied. The contents of this message are appropriate for entertainment and/or informational purposes only. The right of the people to be secure in their papers against unreasonable searches and seizures shall not be violated.

10 years, 11 months

2
2
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Reproducing old machines with newer technology (Re: PDP-12 at the RICM)

by jnc＠mercury.lcs.mit.edu

> From: Sean Caron > Many examples of blinkenlights eye candy throughout computer history It wasn't _just_ eye candy; it was a real help in problem debugging (when the machine was stopped), and you could tell a lot about what the machine was doing (when it was running) from the way the lights changed. When the overall machine cost came down, they were too expensive to be worth what they cost, though. Speaking of lights for feedback, anyone remember the 'run bar' - or whatever they called it, my memory fails me - on the display on the Lisp Machines? Actually, it was a series, IIRC - one for the CPU, one for the disk, etc. The machine didn't have LEDs, but it used short lines on the bit-map display instead. IIRC, the idea was copied from the Knight TV's on MIT-AI. (Which I believe were the first-ever bit-mapped displays - anyone know of an earlier one?) Noel

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Info on Grid Systems 2260 Convertible Laptop/Tablet

by azd30＠telus.net

Hi, My search for any info on a Grid Systems 2260 Convertible Laptop/Tablet has so far been unsuccessful. I am looking for a user manual / repair manual / ads etc. Any help/pointers would be greatly appreciated. Also, if anyone has a power supply and/or accessories for this that they are willing to part with, please contact me off-list thanks -- alex

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PDP-1 Replica for sale

by sellam＠vintagetech.com

I am selling off my last PDP-1 replica front panel. This is a fully functional replica PDP-1 front panel attached to the SIMH PDP-1 simulator running on a PC via a custom interface. It functions almost exactly like an actual PDP-1 front panel. You can deposit code/data from the front panel switches into the simulator memory, read it out by the same, and use the function switches to load virtual "paper tape". This is a fully assembled unit, ready for play. Comes with the simulator PC. Just add a monitor and you have yourself as close to a working PDP-1 as you're probably ever going to get. Photos/videos and other data available upon request. Ships from Livermore, California, or you pick up for free tutorial. Shipping costs should be no more than $60 for ground. Asking price is $3,800. -- Sellam ibn Abraham VintageTech ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintagetech.com Whatsoever a man soweth, that shall he also reap. The truth is always simple. * * * NOTICE * * * Due to the insecure nature of the medium over which this message has been transmitted, no statement made in this writing may be considered reliable for any purpose either express or implied. The contents of this message are appropriate for entertainment and/or informational purposes only. The right of the people to be secure in their papers against unreasonable searches and seizures shall not be violated.

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PDP 12 modes

by jnc＠mercury.lcs.mit.edu

From: Sherman Foy > Re: the 12, you were either in LINC mode or PDP mode at any given time. > These were NOT "parallel processors". I don't disagree. I was speaking of the LINC-8, which was a very different machine inside - it really was an 8 _and_ a LINC in a single box. The front console actually had a complete PDP-8 console _and_ a complete LINC console, side by side - two sets of lights, two sets of switches, etc. > I can't vouch for this on a LINC-8 machine, but I thought it was similar. Nope. Check out the manual I cited. Well, the LINC-8 and -12 might be similar (almost identical, probably) from the _programming_ point of view, but the hardware was organized totally differently (above). Noel

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7030 simulation

by aek＠bitsavers.org

Dug back in my mailbox and Richard Cornwell was looking at this circa 2008-11. There was some work by JAM to OCR the listings. I don't remember if it was greenbar, and if the background was causing problems. The color scanner I use now does color dropout but it would be a PITA to rescan everything.

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Reproducing old machines with newer technology

by jnc＠mercury.lcs.mit.edu

> From: Jay Jaeger > I am going to attempt to do the same for IBM's 1410 computer - a really > big effort. Now, the IBM machine you (or someone) should _really_ do is the IBM Stretch (7030); although judged a commercial failure at the time, in retrospect it's clearly one of the most ground-breaking designs of all time. (In fact, I have a hard time coming up with other machines with the same level of impact/influence, in terms of CPU internal architecture. Maybe Atlas, or the 801?) Noel

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PDP 12 modes

by shermanfoy＠att.net

ATT has gone wierded out on attachments for the moment, so I'm dumping all this into a long text ramble Jim: Please forward these observations to the appropriate parties, copying me. I am having trouble sorting out who started the thread and who is receiving replies. I will respond directly to anyone w/ questions, to the best of my ability and experience. I believe that I see some discrepancies, as I think others are also questioning some assumptions. To: group I own and did operate a PDP-12; having written unique PDP-12 code, I disagree: the 2 modes "ping-ponged". I think some of the thoughts here are based on reading the books and thinking in "hardware mode" and not considering actual operation or the software implementations. I have done the full experience: ownership, hardware integration, commissioning, running and developing custom code of both PDP-12's and PDP-8's. I still own 1 PDP-12 and 4+ PDP-8's. Re: the 12, you were either in LINC mode or PDP mode at any given time. These were NOT "parallel processors". You called the LINC IOT instruction to switch from PDP mode to LINC mode; then you "returned" to PDP mode by making the PDP call in LINC code. Usually, you briefly switched to LINC mode to run the peripherals. Most of the code that you ran was PDP code. The TU-55/6's needed LINC code and so did the VR-12, for instance. It is possible that something written for the LINC would be run in LINC mode for high percentages of the time. That code might have some "patches" that ran in PDP mode after review and revision. It could be that such code was modified from LINC code to a PDP-12 routine using the 12 as a "development system" to test and implement such patches. The PDP-12 switch selected which mode you STARTED FROM, IIRC. Once you had launched and were running code, you had to switch via code calls in the routines. I can't vouch for this on a LINC-8 machine, but I thought it was similar. I wrote my own "Mag Tape Boot Loader" in my trials and tribulations while my 12 was running. The following is an excerpt from my account of that experience. Note the PDP versus LINC calls inline in the code. <quote> My Boot loader [MTBL] code used the followings syntax. It resided at the high end address of a page, was toggled in via Front Panel and a Front Panel "Start Switch" launched the code. It called the Mag Tape and rewrote itself over the corrupted memory. I think I had another routine to update the Mag Tape locations periodically, after rewrites. I can't remember the LINC syntax and would have to look those up in the reference manuals. (Don't leave the launch address without them.) Comments are posted after the code [in this case], to allow for inevitable corruption by non column friendly text machinery. ************************ * MAG TAPE BOOT LOADER * ************************ CLA LINC LIF 0 LDF 0 AXO RCG DATA PDP JMP I+1 DATA Comments, added here due to not being in "column mode" /MAG TAPE BOOT ROUTINE; /MUST BE PRESENT IN TAPE /BLOCK 273; WILL BE OVER- /WRITTEN ON USE. /WHEN CALLED THIS CODE READS /TAPE BLOCKS 270-273 TO /MEMORY BLOCKS 0-3. /TO USE: / 1) LEFT SW TO 1760 / 2) START LEFT SW /RESTART ADDRESS Sherman, 12 owner shermanfoy at att.net <endquote> The longer narrative in a Word doc is attached. A PDP-8 WILL NOT run LINC code: that is also by ownership & experience & hardware troubleshooting-debug & handwriting machine code. I did ALL of that in one session of working on a design flaw in the 8-E [also F & M] machines. Again, the PDP-12 does not run the two modes CONCURRENTLY, rather they run CONSECUTIVELY. I am borrowing the legalese for terms of sentencing, as it lends itself well to this description. And again, I am doing this from actual ownership and experience of getting hardware running, hand-coding and debugging custom routines. Of course, I did this after researching and reading instruction sets from the programming manuals and poring through sample code listings. Further, as I previously mentioned, I cannot vouch these thoughts and descriptions for the LINC-8. If I understand this correctly, the "straight LINC" would also share the use of LINC only code characteristic w/ the PDP-8's use of the PDP only code characteristic. My 12 is in storage and would be a "year out" to operation at any given time. That assumes that it has not suffered deterioration from its "put in storage running" status. It has always been stored in dry storage. Another major obstacle is simply finding the proper floorspace to mount its large footprint environmentally. If I am encouraged and/or flogged, I may bring the 12 machine out of retirement. I expect that my path will be to launch a PDP-8M [perhaps a PDP-8E] first and then bring the PDP-12's VR-12 out and try to interface it w/ an IBM PC. There is a local "moral imperative" to resurrect SpaceWars :) I also intend to try to make a TU-56HM STANDALONE Mag tape talk to the PC machine. The TU-56 Standalone mode is a rare beast and can be found in the FOOTNOTES on the TU-56 drawings. I do not believe there was a complete document for the Standalone machine. I seem to have the requisite TU-56 hardware, but I am not sure of the interfacing and cabling. Code would likely be written in C from a DOS environment on the PC. This would, likely be analogous to some of the TU-58 modes of operation, which were based on serial ports. I also have several pieces of TU-58, including a VT-103 machine. These projects could be described as ambitious. We need some more SoCal DECnutz. <quote> Then I discussed my 12 running time: The "12 monster" had Core Memory, which, like an elephant, doesn't forget. It had about 100 pounds of Sola Constant Voltage Transformer. These combos are good for brownouts. It had a Power Fail Auto Restart Option [PFAR, my acronym]. I learned the hard way on a PDP-11/44: don't screw with it and it will restore itself when the power come back. Also, the power supply had three gigantic electrolytics, about the size of thermos bottles. These guys were significant fractions of a Farad 40 YEARS BEFORE SUPERCAPS. The decay rate of the power supply was fantastic. This provided major "headroom" on the RC time constant that the PFAR used. One thing done with this was to turnoff the Write Amps for the Core Memory on Power Fail detection. All in all, blackout/brownout, the 12 was ready. I had a block level blackout happen and when the power came back on, restarted in "mid sentence" of the code I was bumming. I wrote my own version of a "Monitor", that I called MON-12. It was based on ODT-8. I originally keyed it in from the front panel, hundreds of lines. I wrote the documentation as I went. I stripped out the Paper Tape stuff, since the 12 didn't have one and I would have to add an extra cabinet; later??? The 12 had two TU-55's. Tape-tape copy was an obvious feature. But I always wondered why they didn't use a TU-56 Dual Transport and put a Paper Tape in the main cabinet. I have two TU-56's and a stack of PC-0X's patiently waiting in the warehouse. Somewhere along the way, I got to where I could edit from the keyboard. I also started work on an ambitious "block mode copy" function. If you can see this coming, I developed code that would "eat itself". After toggling this in from the Front Panel three times, I decided to take a cue from the Paper Tape stuff I had removed from ODT. I wrote a Mag Tape Boot Loader [MTBL, my acronym]. The 12 implementation for the Mag Tape used LINC code, not a TU-55 IOT set of calls. My Boot loader [MTBL] code used the followings syntax. It resided at the high end address of a page, was toggled in via Front Panel and a Front Panel "Start Switch" launched the code. It called the Mag Tape and rewrote itself over the corrupted memory. I think I had another routine to update the Mag Tape locations periodically, after rewrites. I can't remember the LINC syntax and would have to look those up in the reference manuals. (Don't leave the launch address without them.) Comments are posted after the code [in this case], to allow for inevitable corruption by non column friendly text machinery. ************************ * MAG TAPE BOOT LOADER * ************************ CLA LINC LIF 0 LDF 0 AXO RCG DATA PDP JMP I+1 DATA /MAG TAPE BOOT ROUTINE; /MUST BE PRESENT IN TAPE /BLOCK 273; WILL BE OVER- /WRITTEN ON USE. /WHEN CALLED THIS CODE READS /TAPE BLOCKS 270-273 TO /MEMORY BLOCKS 0-3. /TO USE: / 1) LEFT SW TO 1760 / 2) START LEFT SW /RESTART ADDRESS Sherman, 12 owner shermanfoy at att.net <endquote>

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Data General Kit on Ebay

by dave＠willomail.co.uk

Not mine but could be interesting for anybody local... http://www.ebay.com/itm/Trailer-full-of-Data-Genereral-computer-equipment-G… Cheers, Dave

10 years, 11 months

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PDP-11 pages/segments/etc (Was: PDP-12 at the RICM)

by jnc＠mercury.lcs.mit.edu

> On Jul 13, 2015, at 8:52 PM, Johnny Billquist <bqt at update.uu.se> wrote: > ??? What segments??? The PDP-11 have a plain simple page table. No > segments anywhere in sight. And each page is 8K. I know the processor handbook calls them 'pages', but I can't think of any other machine where pages are variable size. (I know of a couple which offer _two_ page sizes, but none that have a field per page which specifies the length of the page.) They really are more like what most machines call 'segments'. I know Unix doesn't use them that way (because it has such a simple-minded memory model), but other systems do - e.g. MERT. Noel

10 years, 11 months

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FS: Apple IIGS, C64, Intel OpenStep Boxes, DOS Gaming rigs & more

by slandon110＠gmail.com

Clearing out more of the collection that never gets used- everything works perfectly and is cosmetically in good condition. Prices are make an offer, i just want to see this stuff go to a good home Apple IIGS ROM 03 4MB RAM Card CFFA 3000 Card 2x 3.5inch FDDs 1x 5.25inch FDD AE Conserver- Allows you to sit 2 Floppy drives under the monitor and functions as a power strip Commodore 64 C64NIC+ ZoomFloppy SD2IEC Interface with 8GB SD Card JiffyDOS Cart Slot Expander from Jim Brain 1701 Monitor 2x 1541 FDDs Mac Performa 631CD 64MB RAM 500MB HDD Ethernet Card Matching 15inch Monitor NeXT Mono Slab 20MB RAM 2GB HDD Frog Monitor Non ADB Keyboard & Mouse HP 9000/712 96MB RAM 1GB HDD NeXTSTEP 3.3 Installed Sun SparcStation 5 64MB RAM 36GB HDD OpenStep 4.2 Installed 3 Intel OpenStep 4.2 Boxes Dell Dimension XPS T450 128MB RAM 10GB HDD Rage 3D Video SoundBlaster Awe32 USB Card- Supported in OpenStep 4.2 Dell Dimension 233mhz 32MB RAM 4GB HDD Networking OpenStep 4.2 Installed Needs SB 16 Card for Audio HP Pavilion 6630 Celeron 500mhz 64MB RAM 3C905 Network Card Running OpenStep 4.2 Needs SB 16 Card for Audio DOS/Win Gaming Rigs Dell Dimension L1000R Windows 98SE 256MB RAM 20GB HDD Rage 128 Video Dell Dimension L667R 128MB RAM 15GB HDD Rage 128 Video. IBM AT Clone 40MB HDD 640K RAM 5.25 and 3.5 Drives Parts & Stuff 10 36GB SCA SCSI Hard Drives Sun Caddy Load external SCSI CD-ROM Sony External SCSI CD-ROM 4x Zip Drives, 2 Parallel 2 SCSI with 20 zip disks Syquest EZ135 Drive with 15 Carts Medium Flat rate boxes filled with DSDD 3.5inch Disks 5.25inch Disks and 3.5in HD Disks 6 Large totes filled with SCSI Cables, AC Adapters, Ethernet Cables, You name it There is honestly too much to list.. Thats just a sampling of whats here in parts and accessories. Thanks Steve

10 years, 11 months

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PDP-11 pages/segments/etc (Was: PDP-12 at the RICM)

by jnc＠mercury.lcs.mit.edu

> From: Johnny Billquist > While the pages are variable in length, each page starts at an 8K > virtual address boundary. Which is another difference between PDP-11 'pages', and real pages as used on every other machine of the period which had virtual memory: normally, page sizes were small, ranging from 512 bytes to 1K words. No other machine was even _close_ to 8KB. In other machines, the page was the fundamental unit of memory allocation; on PDP-11's, that unit is the click (0100 bytes). > If you only had one page, and that page covered the full virtual > address space, then I would agree that it was a segment model. That's only true in the brain-damaged x86 model, in which 'segments' were added as a kludge to expand the address space. If you study _real_ segmented architecture machines, like the GE645, NS32K, etc you will discover that in them, a segment is a fixed-size chunk of the total (much larger) address space, and they start at fixed offsets in that space. A segment which is less than full-sized leaves a gap in the address space before the (fixed) start of the next segment. All of which sounds just like the 'pages' in the PDP-11... Noel

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Front Panel Update

by rodsmallwood52＠btinternet.com

Hello Everybody In the course of doing the artwork for 8/e type B I have turned up some more variations. The list now looks like this: 1. Switch position markings 2. Line round switch area 3. The EMA title block isolated from the other titles 4. Lines between groups of three lamps 5. lab8/e instead of pdp8/e So far I can't find any reasons as to why these variations seem to be random. The only thing that is not cosmetic is the two types of switch position. I am minded to add all of variatons (excluding lab8/e) because they seem progressive: No line round the switch area becomes line round the switch area EMA title attached becomes EMA title detached No lines between lamps becomes lines between lamps Then produce two versions based on the switch position The issue is of course small batch costs. Comments gentlemen please Rod

10 years, 11 months

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Seeking to buy / trade for a GRiD Compass 11xx to aid in silly project

by ian.finder＠gmail.com

Hi folks, I'm looking to buy at whatever price is fair a GRiD Compass (Not the DOS based ones) computer of any model-- and perhaps condition- as I may be able to repair I recently missed an ebay auction, which was sad. Let me know, Thanks, - Ian ----- Background. About a year or so, I purchased my first GRiD compass (1129) off another list member. I quickly gained two impressions: 1) The non MS-DOS based GRiD OS is really freakin' cool. 2) The documentation for these machines is nonexistent. I've recently acquired an 8086 ICE. My goal is to reverse engineer the machine and operating system to a reasonable degree, in order to glean enough information to enable the following tasks: 1) (High priority) Build a somewhat modern toolchain for GRiD OS 2) (This might be something I never get to) Build an emulator of the GRiD. Unfortunately, I don't want to- A) Have to leave my main machine taken apart, or constantly reassemble-disassemble it to attach it to the ICE. B) Develop for a system I have no spares for. Would love if someone who has an extra one of these they haven't used for a while would be willing to part with it or trade for it. In addition to whatever we work out, I'll toss in a free GRiDcase 3 to help with separation anxiety stemming from black magnesium computers. -- Ian Finder (206) 395-MIPS ian.finder at gmail.com

10 years, 11 months

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STSC APL*PLUS System for VAX VMS User's & Reference Manual

by mark＠wickensonline.co.uk

Kind reader I have two manuals labelled STSC APL*PLUS System for VAX VMS: User's Manual and Reference Manual which were sent to me a number of years ago as paper copies - I now have the ability to easily scan these into PDF format. Would these be of interest to anyone? There is a PC version archived here http://www.math.uwaterloo.ca/apl_archives/apl/apl-plus/ that might benefit from the additional documentation. I've contacted Lee about this. I am interested if anyone has any history of this software (there are some general references out there about the STSC Mainframe and later PC versions) - and indeed if the software survived at all. Was VAX/VMS APL based on this version? Regards, Mark.

10 years, 11 months

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Digital IDACS 11/07 Industrial PDP-11

by billdegnan＠gmail.com

I have an interesting brochure, that is not on bitsavers (that I can find), for the Digital " IDACS 11/07 Industrial Control System " This is a stand-alone-capable UNIBUS PDP 11 industrial system made for analog and digital inputs with RSX-11C software, FORTRAN, PDP-11 DOS, COMTEX-11. If this is something not well-known I can post a scan of the sales brochure. - Bill

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PDP-12 at the RICM

by jnc＠mercury.lcs.mit.edu

> From: Rich Alderson > Changing from PDP-8 operation to LINC operation was a matter of a > physical switch. Err, not according to the "Small Computer Handbook" (1967 Edition), which covers the LINC-8 in detail - at least, as I understand it? See, for instance, pg. 307 "A LINC HALT instruction will also stop the LINC and return control to the PDP-8." And see also the "Operational Summary", pp. 308-309, and Chapter 7, "LINC - PDP-8 Intercommunication". Reading the handbook, it _seems_ like, in theory at least, the two machines could run simultaneously (albeit contending for memory bandwidth), although the canonical programming approach was to have one pause while the other ran. Or perhaps that supposition is incorrect, and the two couldn't correctly deal with contention for memory (although the LINC used the standard PDP-8 'data break' mechanism for access to memory, which was used by DMA devices such as disks, so the -8 should have been able to deal with it; perhaps the LINC couldn't); or perhaps there was some vital piece of circuitry shared by both? I wonder if any LINC-8's still exist? > "PDP-8/i + LINC hybrid" The bone I have with that description (which may be technically correct) is that it implies that prior to the PDP-12, there were only the two separate machines (PDP-8 and LINC). But I know I'm a stickler for small details... :-) Noel

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68000 systems and paging.

by tsw-cc＠johana.com

There a re a couple of systems that used a 68000 in a Unix type environment.? I have worked on both.The first is an Altos ACS68000 system that used a 68000 and 4 (four, count'em) 68451 mmu units.? The way it did the memory allocation was to use "stack probes" to trip up a memory fault interrupt.? These probes were simple 'TST' instructions that indicated where the stack would grow to.? These instructions were easily "restarted" since they didn't change the register contents.? Subsequent instructions would have no memory faults and everything would be working nicely. The Rasio Shack Model 16 used the same system, but had a cruder MMU that had two offset and two limit registers.? The operating system was Xenix and worked OK, but the methods for memory management were not the best, but considering the hardware worked OK. The C compiler (from what I understand) was a precursor to GCC and had the stack probes code built in.? It was part of the activation record code. So, yes you can run a Unix style operating system on a 68000, you just need to be creative.? I don't know how others did it.? Yes, the 68010 (or later) was the solution to all the problems.

10 years, 11 months

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PDP-12 at the RICM (Michael Thompson)

by michael.99.thompson＠gmail.com

> > Date: Mon, 13 Jul 2015 01:52:09 -0400 > From: "Kip Koon" <computerdoc at sc.rr.com> > Subject: RE: PDP-12 at the RICM > > Hi Michael, > I would be most interested in finding out more about this effort. Do you > have ongoing pictures documenting this effort? I'd love to have a PDP 8, > 11, 12 someday, but I don't have the space for something like that much > less the cost involved so I'll have to be satisfied with emulators on my PC > or eventually building one or more of these systems with current technology > like the SBC6120 if memory serves. Are there other possible alternatives? > I used a PDP-8/E in high school and college and have been quite interested > in the high capability PDPs like the PDP-11 Series for starters. I didn't > know there were PDP 12 Series computers. Are there other PDP series > computers as well? Congratulations on your restoration efforts! I wish I > could see what all you guys have been and are up to! Take care my friends. > > Kip Koon > computerdoc at sc.rr.com > http://www.cocopedia.com/wiki/index.php/Kip_Koon > Kip, I don't think that there is an emulator for the PDP-12 so you will need to find a real one. Details on the PDP-12 are here: http://www.ricomputermuseum.org/Home/equipment/dec-pdp-12 A running blog on the restoration is here: http://www.ricomputermuseum.org/Home/equipment/dec-pdp-12/dec-pdp-12-restor… Michael Thompson

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PDP-12 at the RICM (Michael Thompson)

by michael.99.thompson＠gmail.com

> > Date: Sun, 12 Jul 2015 16:10:10 -0500 > From: Jay Jaeger <cube1 at charter.net> > Subject: Re: PDP-12 at the RICM > > BTW, if there are particular cards you need / are bad, in addition to > the actual PDP-12, I have the backplanes and cards for a 2nd one, so if > you need something, we could probably work something out. > > JRJ > Jay, We will keep you in mind if we can't repair a flip-chip. -- Michael Thompson

10 years, 11 months

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PDP-12 at the RICM

by jnc＠mercury.lcs.mit.edu

> From: Rich Alderson > PDP-12 12-bit word, PDP-8/i + LINC hybrid Err, DEC sold a PDP-8/LINC hybrid themselves (interesting machine, it's covered in one of the standard PDP-8 processor manuals), before the PDP-12 came out; the -12 was basically a re-engineered version of the 8/LINC. Noel

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