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

by jnc＠mercury.lcs.mit.edu

> From: William Donzelli > Building a complete ENIAC replica would indeed be hard. If only exact > proper NOS parts were used, I might just say impossible. One other component I didn't see listed: rotary switches. ENIAC used tons of them, originally for inputting static data (think ROM :-), and later to hold tables used when they converted it to a sorta-stored-program machine (think uROM :-). And what about the special plug wires (and the male and female connectors used thereon) which were used to 'program' the machine for a given problem - are those still available? Noel

11 years, 7 months

2
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Fwd: is there any word processing software for the pdp11?

by jnc＠mercury.lcs.mit.edu

>> Jacob Ritorto wrote: >> Yeah, but troff is too hard. I'm going to pass over the obvious question ('why would anybody be doing word processing on a PDP-11 in this day and age' :-), and ask if nroff is also too hard? Since it's only intended for character devices (line printers, etc) it's not quite as complex as troff.a I'm not sure if Bell had anything simpler; I'll have to look at my V6 Unix manual set. > From: Ian S. King > But ... Emacs (originally EMACS, "eight megabytes and continuously > swapping") .. is ever going to run on a PDP-11. If you restrict yourself to GNU Emacs, yes. But there are more implementations of EMACS in the world than that bloated monstrosity! We ran an EMACS on V6 Unix at MIT, I forget who wrote it, I think it was someone at BBN; it was quite a nice one. It was quite customizable (but that have only been key bindings and settings, not sure if it included code), and it had all the usual features: multiple buffers and windows, etc. (In fact, it was so painful to use on a VT52, with its small screen, that I migrated to a Ann Arbor Ambassador terminal, with its much large screen, as soon as it became available.) I have several sets of backup tapes from one of the V6 machines at MIT; I sent one off to Chuck Guzis, and he's gotten almost all the bits off of it (a few records had unrecoverable read errors, but the vast majority were OK - like roughly 15 read errors in around 1500 records). I hope to annouce a vast trove of stuff soon from my tapes (once I figure out how to interpret the bits - they are written by a sui generis application called 'saveRVD', and the _only_ documentation of how it did it is... on that tape! :-) That includes a lot of code written at MIT, as well as stuff from elsewhere. Coming soon, in addition to that EMACS, should be BCPL, Algol, LISP and some other languages; MACRO-11 and the DEC linker (which I guess are also available from UNSW tapes), but _also_ programs to convert back and forth >from .REL to a.out format, and to .LDA format; and a whole ton of other applications (I have no idea what all is there - if anyone is interested, I can make a pass through my manuals and try and make a list). Noel

11 years, 7 months

4
3
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HP owners - BOUNTY

by jwest＠classiccmp.org

Reposting, I'm a little worried these do not exist anymore. I've already tried every reseller on the planet. Generous Bounty for any of the following: HP 12920B Asynchronous Multiplexer : 12920-60001 Upper Select Code Data Board 12920-60002 Lower Select Code Data Board 12922-60001 Control Board Or HP 12920A Asynchronous Multiplexer: 12921-60001 Upper Select Code Data Board 12921-60002 Lower Select Code Data Board 12922-60001 Control Board Even single boards of any of the above would be a big help. Best, J

11 years, 7 months

1
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EDSAC lives

by hilpert＠cs.ubc.ca

So, we have the ABC, Colossus, Manchester Baby, and now the EDSAC. Anyone for the ENIAC? Univac I? IAS machine? Whirlwind? How come 3 of the 4 are in Britain? On 2014-Nov-29, at 9:12 PM, John Foust wrote: > The National Museum of Computing unveils EDSAC re-creation: > > http://www.bbc.com/news/technology-30131447

11 years, 7 months

5
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Who's rewired their house for this hobby?

by kspt.tor＠gmail.com

On 24 November 2014 at 22:40, Holm Tiffe <holm at freibergnet.de> wrote: > I understand that it will be very expensive to change such a "naturally > grown" infrastructure and this is that cause that I wrote that the US > should have changed this long before nowi, where it is really to late to do > that. [upgrading (the US) infrastructure] But I'm wondering about Japan. As was mentioned by someone else earlier, their's an example of how it shouldn't be done. However, as part of that they already have a mix (so they're kind of used to that) of 50Hz and 60Hz depending on where you live.. and they use US (or as close as doesn't matter) plugs. At 100V. The whole system is quite frustrating, and scary to look at as well. Rickety-rackety. Reminds me of underdimensioned old 6V car wiring, with much of the same problems (dimming, heat..). So what I was thinking is that it should, in principle, be possible for Japan to introduce 230V in new areas (and new areas are built constantly), with European plugs not only to make it safer but also to clearly make the distinction. That's something that I believe could work in Japan, people tend to pay attention. I'm not so sure it would work anywhere else. That's something I would like to see. Not only because of my old linear transformer computer gear.. or the impossibility to use my favourite bread machine (doesn't come with an 100V AC motor). 100V isn't particularly energy efficient when it comes to distribution, and Japan needs to become much, much more energy efficient. > Here in germany 1 phase power lines simply don't exist. The entire > infrastructure is build with 3 phases and the phase balancing is made on > every distribution paneel in every house. This is why it isn't a big > problem to get a 3 phase outlet installed somewhere you need it. > Most cables are in the ground, but on the other end of my village here > (1km distance to the next city) there are some overhead lines with at least > two transformers on masts that distribute 3x400V to groups of houses. [3phase] Same in Norway (I'm traveling between Norway and Japan so experience both). Or at least in my town. The whole electricity infrastructure was reworked completely for all of the town some years ago. Everything moved from poles to sub-ground cabling, and 400V 3phase to every house, and taken from there. New houses and old ones are done a bit differently internally though.

11 years, 7 months

16
49
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foam in DEC SBB drives, ok to remove?

by nw＠retroComputingTasmania.com

I have some of these DEC SBB module drives, but the foam has gone crumbly, wondering if it is ok to remove the foam and operate without it? http://images.esellerpro.com/2131/I/842/7/100_2665.JPG

11 years, 7 months

12
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Dataproducts B600 help needed

by b4＠gewt.net

Hey, Does anyone have an operator's guide? I found this as a manual http://www.wang2200.org/docs/fiche/742-0432.MNL.2273LinePrinterMaintenance.… which will likely help me fix the board that has the "Bad timing clock" note (covering ICs, not an xtal). It does not however at a quick glance explain what it means that mine just displays "22" as the status. Any ideas? -- Cory Smelosky http://gewt.net Personal stuff http://gimme-sympathy.org Projects

11 years, 7 months

1
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is there any work processing software for the pdp11?

by jacob.ritorto＠gmail.com

or, if not, anyone feel like helping me port a contemporary line printer daemon to 2.11bsd? --jake

11 years, 7 months

1
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Backplane Wiring - Was: Cyber ECL Wiring

by rickb＠bensene.com

Brent H. wrote: > Would that be these?: > > http://www3.telus.net/~bhilpert/tmp/HP2116C/crimps.jpg > http://www3.telus.net/~bhilpert/tmp/HP2116C/backplane.jpg > An almost identical system was used for the backplane wiring on many Wang Laboratories electronic calculators, from the earliest machines (LOCI) through the last of the "large form factor" machines (Wang 500/600/700) calculators. Later machines (100, 400 and C-Series) had much higher levels of integration, which required a lot fewer backplane interconnects, and thus printed circuit backplanes could be used. Rick Bensene The Old Calculator Museum http://oldcalculatormuseum.com

11 years, 7 months

1
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FS: HP 9000 and DEC Alpha machines

by linimon＠lonesome.com

[fwiw, is there a better place for FS/Wanted listings? If there's not some kind of 'commerce' site, should we set one up?] As most of you know, I work for a company that decommisions data centers and resells the equipment (usually eBay but sometimes directly). There are a few things in the triage queue that might be of interest to the list members. If there is interest, I'll approach my boss, otherwise they'll be processed as usual. By default we check eBay for the value before listing anything. At the very least we value it at scrap value. And no, I can't take anything out the back door for cheap :-) They're in business to make money. These will all sell without the hard drives per our contracts with our customers. As for the HP and IBM, I have not yet climbed back all the way into the triage area to get more details. The desktops are accessible to me. Of course all of these are listed subject to prior sale. Reply-To set to me personally, but if you have comments e.g. about appropriateness, please feel free to redirect to the list. I'm a big boy, I can take it :-) mcl 3 * Vaxstation 4000 60 (desktop) 1 * Dec 3000 (desktop) 1 * IBM 3490 EC22 (19" rack full) 1 * HP 9000 Model K360 K-Class 9000 (19" rack full) 5 * Digital Personal Workstation 500au (desktop) 2 * Digital Personal Workstation 600a (desktop) 2 * Compaq XP1000 (desktop, appear similar to above)

11 years, 7 months

4
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Seeking the following items

by slandon110＠gmail.com

Hey guys i know its a shot in the dark, But im looking for the following for my old high school machine. NEC MultiSync 3D monitor OmniKey AT Keyboard Logitech Mouseman 3 Button Mouse Thanks again

11 years, 7 months

2
1
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Problem with DEC LSI11 / KD11-F

by jnc＠mercury.lcs.mit.edu

> From: Mattis Lind > The M7270 board has the following chips: > 1611H 21-15579 > 3007D 23-002B5 > 3010D 23-001B5 > 2007C 23-002C4 I have two M7270s (haven't checked to see if either one works, yet - need a working chassis with an 18-bit backplane, too lazy/busy to pull the removable terminations on my working Sigma Q22). One has: 1611H 21-16890-00 3007D 23-007B5-00 3010D 23-008B5-00 2007C 23-003C4-00 which is fairly different from yours; the date codes range from 8018 to 8021 on the uROMs, and 8029 on the ALU. 1611H 21-16890-00 3007D 23-007B5-00 3010D 23-001B5 2007C 23-002C4-00 which is intermediate between yours, and my first one (but does seem to indicate that to some degree, these things could be mixed, they aren't matched sets). The date codes from the ROMs are 8026, 8041 and 8126, and 8031 on the ALU (so the 002 2007C is later than the 003...) Noel

11 years, 7 months

2
1
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FTGH: 2 Sun 280R machines, etc. (Austin, TX)

by linimon＠lonesome.com

These are my personal machines. There is just no more room in the rack for everything I have now. Plus, I would really like to be able to get to the exercise machine again :-) These are 4U dual-processor machines, I think 933MHz each and 4G RAM each. If it really matters I can fire them up and go check. They were both working when last powered on a couple of years ago. (fwiw, the company I work for routinely scraps these, as no one wants to pay for shipping, so I know they're not worth much.) And, if you don't want to run code on them, I will note they make fantastic room-heaters :-) They are known to run FreeBSD. I also have some other stuff that is going to scrap unless someone really wants it. And by "stuff" I mean "junk". 3-4 Sun Netra T1 105s, maybe working, maybe not 2 HP DL360 32-bit machines, actually I have already pulled the pieces, but just in case ... several caddies and blanks for the above 3 Dell PowereEdge 2550s. Dual P-III 933MHz. I have caddies. These are free for anyone who wants them. I can deliver in the Austin area -- but, my car can only hold 4U at one time so if you want more than that you will have to come get it. I will hold on to the Suns for a bit, but the rest I'd rather scrap in the next week or so. mcl

11 years, 7 months

1
0
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Pinout of VAXstation 4000 Power Connector

by robert.jarratt＠ntlworld.com

I got a VAXstation 4000 Model 96 yesterday. Before I switch it on I want to test the PSU (H7819) on its own, check it for ripple etc. However, I can't find the pinout of the power connector. I don't want to switch it on with no load, to try to work out the pinout. Does anyone have this information? Regards Rob

11 years, 7 months

1
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Problem with DEC LSI11 / KD11-F

by mattislind＠gmail.com

I have been browsing through some of my old Qbus boards and found one KD11-F (M7264) CPU with 4 k word memory, a couple of KD11-HA (M7270) , a KDF11-A (M8186) and some assorted memory boards and some SLUs. All CPUs seemed to work except for the KD11-F board, which was a bit sad since that was the original LSI-11 board. I looked at bitsavers for schematics. Indeed there was one, but my board revision seems to be older. It is not matching layout wise and it has plenty of patches. Is there a print set for the older revision of the board? Well, I am not giving up that easy. The clock signal was there so I attached the logic analyzer over the control chip and was able to find out the micro address (sampled at falling PH2 clock) and data (sampled at falling PH1 clock). The strange thing was that it was not starting at address 1. It starts of at 89 hex, then steps to 8A and then to 39D. The data returned is FFFF, FFFF and 708A (forever). FFFF is supposed by NOP. 708A is also some other valid micro instruction. (according to the EK-KUV11-TM_LSI11_WCS.pdf <http://www.textfiles.com/bitsavers/pdf/dec/pdp11/1103/EK-KUV11-TM_LSI11_WCS…> ) Is the micro code source / dump for the LSI-11 available somewhere? If I remove one of the MICROMs it starts at 1 and goes on 2,3,4,5,6, etc. My guess is that one of the MICROMs are bad, forcing some bits low. Or maybe the strange precharging isn't working? Now, I have several M7270. I could sacrifice one board to get the other working. But are the chips identical? The markings on the chips are not identical. The M7264 board has the following chips: CP1611B-51 2111549 CP1621B451 23001C201 CP1631B-10 23088A501 CP1631B-07 23087A501 The M7270 board has the following chips: 1611H 21-15579 3007D 23-002B5 3010D 23-001B5 2007C 23-002C4 Is there a engineering drawing printset for the M7270 (KD11-HA) somewhere? /Mattis

11 years, 7 months

4
9
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AT&T 3B2 information

by lists＠loomcom.com

Folks, For some reason I got it in my head that writing an AT&T 3B2 emulator might be a good idea. That idea has pretty much been derailed by lack of documentation. I have been unable to find any detailed technical description of any 3B2 systems. Visual inspection of a 3B2 300 main board reveals the following major components: - WE32100 CPU - WE32101 MMU - 4 x D2764A EPROM - TMS2797NL floppy disk controller - PD7261A hard disk controller - SCN2681A dual UART - AM9517A Multimode DMA Controller How these are addressed is anybody's guess. To even dream of doing an emulator, I at least need to know the system memory map -- what physical addresses these devices map to. Without that it's pretty pointless to get started. If anyone has access to this kind of information, please drop me a line. Otherwise, I'll just put this one on the far-back burner! -Seth

11 years, 7 months

6
6
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Relay question

by cctech＠beyondthepale.ie

On 28/11/2014 at 02:23, Jim Brain wrote: > I know this is not an electrical forum, but I thought perhaps someone > has seen what I am looking for. > > For an application, I am looking for a relay that is connected to 12V > through a switch, with the switch voltage also going to the middle of > a SPDT relay contacts. > > * If I energize the latch once, for the time the button in pressed, > the relay flips "on" and the middle relay contact sends power to the > NO contact > * If the energize the latch a second time, for the time the button is > pressed, the relay flips "off" and the middle relay contact sends > power to the NC contact. > > The circuit works with an open relay of the kind they used to use in > garage doors (push button once, and door goes up, second press makes > it go down...) But, we need a sealed relay to beat the weather (it's > for a lineman's bucket truck we own). > > Simulating this with some electronics and two relays won't work (well, > it would work, but it's for my father, and he really wants a > electrical/mechanical relay solution, like he has, but weathertight). > > I thought for sure there was such a thing as a D-type FF in relay > format, but all of the magnetic and mechanical latching relays I see > online use two separate coils to operate, which means two switches, > and that won't work (no more signal paths available in this application). > > I must not know what to call what I am looking for, and was hoping > someone had a better name for this type of thing or a suggestion of > where to look... > > Jim > I have come across a relay like this controlling the door of a bus. One push to make switch, push once to open, push once to close. The bus schematics called it an "impulse relay". This is East of the Atlantic - who knows if they they call it the same thing where you are. The one I came across was 24V rather that 12V too. (There were no classic computer systems on the bus, unless you count the radio system which allegedly tracked the bus location and radioed it back to the controller. It counted pulses from the speedometer/odometer tachogenerator and did 4 bit BCD arithmatic on them using 4000 series CMOS.) Regards, Peter Coghlan.

11 years, 7 months

8
15
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facit 4042

by rachael＠telefisk.org

Does anyone happen the manuel for the facit 4042 punch/reader prod 9280 3111, looks a bit like the 4047 but is has no display/keyboard, and turned 90degres. Has two IEEE-488 connectors, one of which is on an expansion board with dip switchs to set addres. -- Jacob Dahl Pind | telefisk.org | fidonet 2:230/38.8

11 years, 7 months

1
0
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DEC document AA-L619A-TK

by mouse＠Rodents-Montreal.ORG

I went looking for MSCP docs and found a PDF holding scans of a copy of version 1.2 (April, 1982) of DEC document AA-L619A-TK ("MSCP Basic Disk Functions Manual"). It had some of what I wanted. I've now done a conversion to text and manually checked and cleaned up the result. But I'm not sure whom to offer the resulting text file to. I don't know where I got the PDF; my notes give http://vt100.net/tmp/l619atk.pdf and http://www.microvax.org/awx/computers/VAXen/l619atk.pdf as places, but neither of those is accessible now - vt100.net returns an "I'm moving, stuff may be offline" page, and www.microvax.org gives ETIMEDOUT. And my wetware memory doesn't help me any. Anyone want a copy, or care to suggest where I should mail it? /~\ The ASCII Mouse \ / Ribbon Campaign X Against HTML mouse at rodents-montreal.org / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B

11 years, 7 months

3
5
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AT&T 3B2 ROMs?

by lists＠loomcom.com

All, Does anybody have binary or hex dumps of the (E)PROMs from any AT&T 3B2 variant? I would be very interested in examining them if you do. I'm looking especially for any (E)PROMs from the 3B2 Model 400 or the 3B2 Model 600, but frankly I'd be happy to get all and any I can find. -Seth

11 years, 7 months

2
1
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Relay question

by brain＠jbrain.com

I know this is not an electrical forum, but I thought perhaps someone has seen what I am looking for. For an application, I am looking for a relay that is connected to 12V through a switch, with the switch voltage also going to the middle of a SPDT relay contacts. * If I energize the latch once, for the time the button in pressed, the relay flips "on" and the middle relay contact sends power to the NO contact * If the energize the latch a second time, for the time the button is pressed, the relay flips "off" and the middle relay contact sends power to the NC contact. The circuit works with an open relay of the kind they used to use in garage doors (push button once, and door goes up, second press makes it go down...) But, we need a sealed relay to beat the weather (it's for a lineman's bucket truck we own). Simulating this with some electronics and two relays won't work (well, it would work, but it's for my father, and he really wants a electrical/mechanical relay solution, like he has, but weathertight). I thought for sure there was such a thing as a D-type FF in relay format, but all of the magnetic and mechanical latching relays I see online use two separate coils to operate, which means two switches, and that won't work (no more signal paths available in this application). I must not know what to call what I am looking for, and was hoping someone had a better name for this type of thing or a suggestion of where to look... Jim -- Jim Brain brain at jbrain.com www.jbrain.com

11 years, 7 months

7
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Facit 4046/4047 Reader-Punch Manual Available

by kylevowen＠gmail.com

I scanned in my two manuals for the Facit 4046/4047 that I have and gave them to Al at bitsavers. He got them uploaded the other day (thanks again, Al!), so feel free to check them out. Setting up this reader-punch without it is a big pain (I've tried). http://bitsavers.trailing-edge.com/pdf/facit/ Enjoy, Kyle W4GNU

11 years, 7 months

1
0
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KL-10B in DEC-20 [was RE: Who's rewired their house for this hobby?]

by jnc＠mercury.lcs.mit.edu

> From: Rich Alderson > We have a non-running 1090 here at the museum Oh, good, then you have a machine to run ITS on (along with ones for WAITS and Tops-10! :-) Just kidding (mostly); ITS did run on a KL (without hardware mods), but I'm not sure which model it was; it was a pretty early one. I know it had the external memory bus, and I _think_ it had the RH20s (I know it had RP's of some kind, I think MassBus, because one of them was dual-ported and the console 11 booted off of it, and I don't think it had whatever PDP-10 disk controller the KA's had). I guess it was a KL-B, then? Whichever one it was, anyone who wanted to run ITS on a KL would probably want the same model - I know ITS had custom microcode (in part to emulate the MIT pager, which had a different page size from the BBN/DEC one, and also because ITS used some custom instructions which had been added to the KA's), and although one could probably get that to run on a different model KL, it might be (an unknown amount of) work. But, completely seriously, ITS is an amazing system, and although there are a few running on simulators, I'm not sure anyone has it running on real hardware. That would be Very Cool. Noel

11 years, 7 months

7
11
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Apple Network Server, Anyone seen one?

by alexmcwhirter＠mojovapes.net

This were produced by apple in the mid 90?s. The ran AIX and were pretty large machines. I?ve been looking for one for a couple of months to no avail. Considering they were only produced for a year should i assume that they have all be crushed?

11 years, 7 months

9
10
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IBM RT - AOS / SAUTIL

by jonathan.chote＠gmail.com

Hey everyone, I've seen a few topics on here in the past regarding the IBM RT, so thought I'd ask around here. I'm installing a new ESDI drive in my 6150 Model 135. I've mostly been researching the old Usenet group and the FAQ to work bits out but now I've become stuck. It seems the fail-safe trick to getting non-IBM ESDI units working is to perform a blind format using the AOS SAUTIL disk. Does anybody have access to this disk or disk image or know where I can find one? My AIX 2.2.1 / VRM disk returns "I/O error writing configuration record" during format which I believe is because the drive needs to be cleared. IBM PC RT Diagnostics won't recognize a drive and format until it has the configuration record. Any help tracking down that SAUTIL disk or assistance would be much appreciated. Thanks! Jonathan

11 years, 7 months

2
1
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Cyber ECL Wiring

by bpettitx＠comcast.net

Eric Smith wrote: "Another approach is to use single-ended on a module, but only differential between modules. To do it properly, the differential signals between modules need to be twisted pairs." You are correct. Eric, have you seen a Cyber 170 chassis? There is no back plane. Every signal uses twisted pair wire wrap from module to module. It was horrible to build, wire mats inches thick. We used to allow field engineers 10 minutes per signal line for engineering change orders. Provided, the line did not need to be tuned. Tuning was done by changing wire length. It was not elegant by later standards but was very very fast for the era. One of the downsides to using differential wiring throughout the system was the manufacturing time measured in months. Of course, they sold for millions or tens of millions of dollars so it was worth this approach. At the time, early 1970's, there was not a lot LSI available in ECL. So most of the Cyber series, and early Crays used SSI. Chip count was never as important as speed. The one MSI that I remember being critical was the 10181, an ALU chip. To use it and keep signal lengths short, the arithemetic chassis was laid out with the ALUs in the middle and the registers around them in a circle. The carry tree was at the center of design. Internally, word size was a bastard mix of 60 and 64 bits. The higher performance models were a mixture of discrete modules from the 7600 and ECL modules from the Cyber 173. It's hard to visualise with today's technology. The multiply unit took an entire chassis! Memory took multiple chassis. All I/O cables and interchassis cables were differential tuned cables. All I/O had to use the same length cables. As Chuck mentioned, 400 Hz MGs provided the power. It was distributed to the chassis where the diodes were mounted in alunimum bars, cooled by freon. If you get a chance sometime, look at the Cray-1. The part where you sit is all power components. The circular logic chassis was primarily to keep wire length short. Seymour tried to build it using an absolute minimum of chip types, only two for much of the logic. He felt that MSI and LSI stole speed from his design. Billy Pettit

11 years, 7 months

2
1
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Apple IIe/GBBSPro v1.3/MSS100 help

by tpresence＠hotmail.com

Hey guys,I've been working on trying to get an internet based BBS setup on my apple IIe.I have GBBSPro 1.3 running on the IIe using a super serial card in slot 2, switched to run at 2400BPS. I have the modem set to external, and the modem type is "Hayes Smartmodem 2400".I am using a straight through 25M-25F between the MSS100 and the super serial card. The ssc selector block is pointing to "terminal". There is no null modem in the setup.The MSS100 is accepting remote connections, and the serial port is also at 2400BPS N81. The settings for Access: remote, DSR logout, DTR wait, and Modem Emulation are checked. I have tried all flow control options and none.When I telnet to the remote access port (2001 or 3001) it connects but immediately disconnects. Once in a while I see an modem initialization string on the terminal before it closes. The string is "ATX3S0=1&C1&D2S2=128". I understand what the init string does, but I'm not sure if its coming from the MSS100 or from the BBS. During this period, the bbs is just sitting at the "waiting for call" screen.If I turn off DSR logout, I do not get disconnected, but I'm not connected to the bbs.Anyone have any experience with this? Are there any settings that must be changed?Thanks in advance,Kevin? 2014 MicrosoftTermsPrivacy & cookiesDevelopersEnglish (United States)

11 years, 7 months

3
4
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SMD replacement options?

by tshoppa＠wmata.com

http://www.mbiusa.com/mbi_000010.htm

11 years, 7 months

4
3
0 0

Who's rewired their house for this hobby?

by bpettitx＠comcast.net

Will wrote: "On the other hand, ECL does not suffer from the spikes, burps and farts TTL tends to make. Late model Cybers tend to have very little in the way of filtering, simply because the ECL load is "nice"." ECL, if done properly, uses a terminator on every signal line. On MECL it is usually it's 560 ohms to -5.2v or 220 ohms to -2.2 volts. Because most circuits have two ouputs, signal and not signal, termination gives you almost a steady load. This termination and balanced lines gave the Cybers very fast signal propagation with little noise like Will mentions. And it requres a lot less regulation and filtering requiremets for the power supplies. It was a joy to design with ECL, if you ignored the horrendous power required. We could weld with the Cyber power supplies! And if the freon cooling failed, you got some interesting smoke within seconds. Billy

11 years, 7 months

5
8
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Vince Briel computers

by gkaufman＠the-planet.org

I have to admit I'm getting very frustrated with the situation. I ordered from Vince in August, and paid $218 in advance. His website is still accepting payment via Paypal, and it appears that others have also not received shipment of their Superboard III orders. I guess he's in San Diego, anyone have any direct contact information other than his email address? - Gary On 11/10/2014 2:38 AM, cctech-request at classiccmp.org 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.

11 years, 7 months

3
2
0 0

Ti microExplorer

by turing＠shaw.ca

Hi: I've been collecting Lisp items for several years now; I had acquired a Symbolics MacIvory through the 'usual channels' as well as a TI microExplorer that took years to assemble. When I moved a couple of years ago, I didn't realize that the microExplorer had suffered a fatal injury, until I attempted to power it up at the request of someone interested in it. As most of the 'old Lisp' mailing lists are more-or-less defunct, and the current generation of Lisp enthusiasts appear to be focussed on software-only systems, I'm hoping that someone on this list knows where it might be possible to get boards for the TI microExplorer or, hopefully, has one that they'd be interested in making available. I realize that this is quite a long shot, as the system was developed in the lat '80s and didn't see a lot of sales. [I'd even be happy with a second MacIvory, if someone was willing to part with it...]

11 years, 7 months

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Who's rewired their house for this hobby?

by bpettitx＠comcast.net

I can't speak to other areas, but where I live, in California, 3 phase is already brought in to most houses. But it is split at the power box. One phase to common is used for 120 volt single phase service. The other two phases to each other give 220 volt for major appliances. This shifts from house to house to balance out the loading. You can apply to have 3 phase service at the distribution point for heavier machine use. It doesn't involve any extra wiring but is a bitch to get permission. Zoning is very tight to prevent residences from being used for businesses. And also because most of the applications came people looking to set up a grow house. Though lately, most grow houses just steal the power by bypassing the meter. Billy

11 years, 7 months

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KL-10B in DEC-20 [was RE: Who's rewired their house for this hobby?]

by jnc＠mercury.lcs.mit.edu

> From: Rich Alderson > Yes, MIT-AI. We purchased it from CZ, who rescued it from the AILab > skip, then from the Symbolics skip, then eventually sold it on eBay > when he had to. It still has the MIT de-acquisition sticker on the > front panel. Wow! That machine still exists? I'm pretty blown away! I was the person who got the donation of the 3 KS's for MIT, actually! IIRC correctly, I heard that DEC was giving tham away, or something like that (I think they had an over-supply when they decided to turn off PDP-10 support), and I thought it would be cool to have some - MIT was turning off the KA-10 ITS machines at that point (too much space, too costly to maintain, etc, etc), and the KL MC clearly wasn't long for the world either (ditto). So I talked to people at MIT about how to do it, and someone talked to people at DEC (our salesman, IIRC), and I wound up writing a letter, which Dave Clark signed, explaining how ITS was a really significant system historically (giving the details on why), and how it would be great it DEC could donate a couple of these machines so it could continue to run, etc, etc. So three machines duly arrived, and I thought they were so cute (small little boxes) I decided they should be named after the three little droids in "Silent Running" (Huey, Duey and Louie) - so if you look inside the front door you should be able to find "MIT-HY" or "MIT-DY" or "MIT-LY" written somewhere in permanent marker. Alas, nobody else liked the idea, so they were given recycled names. Pissed me off no end (since they machines wouldn't even have been there, if not for me)! >> ITS is an amazing system, and although there are a few running on >> simulators, I'm not sure anyone has it running on real hardware. >> That would be Very Cool. > I agree. As I noted in my response .. I'm working on it. :-) Excellent news! Thanks! Noel

11 years, 7 months

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Who's rewired their house for this hobby?

by kspt.tor＠gmail.com

On 27 November 2014 at 08:13, Geoff Oltmans <oltmansg at gmail.com> wrote: > > On Nov 26, 2014, at 3:04 PM, Chuck Guzis wrote: > >> Electrical resistive heating for household hea[t]ing in the US is being discouraged. There are government incentives to convert to much more efficient heat pump technology--with the side benefit of air conditioning in the summer. I do have "emergency" resistive heating elements in my air handler--they're connected to two 40A/240V circuits. > > Yeah, and heat pumps work great for heat until there is no heat in the outside air from which to extract. With my current (albeit aging) system, that temperature is around 28F, then it's on to the heat strips. Just get a newer heat pump :-) They're getting better year by year. The technology improves rapidly. The one I have installed in my living room starts out at more than 4-to-1 efficiency, 4kW heat for 1kW of electricity. It doesn't get down to 1-to-1 until -20C, that's about -4F I think. And it doesn't really get that cold in my town. The heat pump is barely ticking over to keep the larger part of the house warm most of the time. I don't need any additional heating to keep the whole second floor warm if I wish to (just open the doors. The heat pump, although not a big model, can take it. But house insulation is also very good in Norway, and that's probably the best first step one should look at, everywhere). The newest models though (three to four years newer than mine) are closer to 5-to-1, and they are able to extract heat from outside air until the temperature drops down to -30C (-22F). It's really impressive. If someone had told me ten years ago that you can extract useful heat from air all the way down to -30C, for less energy than you put in, I would have rejected the notion. Most of these heat pumps are Japanese.. Panasonic, Mitsubishi etc. (there's also at least one Korean, from Samsung. I have no knowledge about it). Those Japanese heat pumps are called 'Nordic' models.. the funny thing is that I can't find them in Japan! Only "old style" combination heater/AC systems. Now there's a place where some energy efficiency is loudly called for. Seems their best goods are only for export, at least for that category. Anyway, that heat pump did wonders for the electricity bill, even though I used to burn (free) wood in a wood stove nearly every day all winter in the past. Not anymore, and I still use much less electricity. (And I just noticed that the price of heat pumps seems to have dropped by half compared to some years ago.) -Tor

11 years, 7 months

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Who's rewired their house for this hobby?

by jnc＠mercury.lcs.mit.edu

> From: Holm Tiffe > I think the US should have modernized the entire System long before > now.. Two words for you: 'installed base'. :-) Sort of like QWERTY keyboards... :-) Noel

11 years, 7 months

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KL-10B in DEC-20 [was RE: Who's rewired their house for this hobby?]

by RichA＠LivingComputerMuseum.org

From: Jon Elson Sent: Wednesday, November 26, 2014 10:36 AM > On 11/26/2014 01:47 AM, Eric Smith wrote: >> On Tue, Nov 25, 2014 at 7:42 PM, Jon Elson <elson at pico-systems.com> wrote: >>> On 11/25/2014 02:18 PM, Eric Smith wrote: >>>> Actually to 13 massive linear regulators on multiple large heat sinks. >>> There may have been several versions. The KL10B in a Decsystem 2020 >>> we had >> A DECSYSTEM-2020 uses a KS10, which has no ECL, and uses a big >> switching power supply made by third parties. The KL10B was used in >> the DECsystem-1090, but not in any DECSYSTEM-20 models. > Not true! The CPU was, absolutely, a KL10B. It was in a big orange > cabinet that was fairly similar in size and shape to a VAX 11/780. It > had a PDP 11/40 (I think) in the next bay over as the I/O processor. > I am not so clear about the exact "DECSystem" designation, but it VERY > much was a DECSystem 20<something>. [...] The label on the front of > the cabinet said "DECSystem-20" without specifically giving the model > number. Only the DECSYSTEM-2020 (with the KS10 processor) expanded on the "20" in the name. I believe that the KL10B processor was used in the so-called "Model A" DECSYSTEM-2040 and the DECsystem-1080. All the later systems, generically called "Model B" by the diagnostics and RSX-20F, were the various suffixes named by Eric, along with some he did not mention. We have a non-running 1090 here at the museum which is clearly and unambiguously labeled as a KL10D, as well as a KL10PV (blue 1095) and KL10PW (orange 2065) which run WAITS and Tops-10 7.04, respectively. Rich Rich Alderson Vintage Computing Sr. Systems Engineer Living Computer Museum 2245 1st Avenue S Seattle, WA 98134 mailto:RichA at LivingComputerMuseum.org http://www.LivingComputerMuseum.org/

11 years, 7 months

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Who's rewired their house for this hobby?

by jnc＠mercury.lcs.mit.edu

> From: Guy Sotomayor > The terms long pre-dated modern digital computers. Actually, the document which, AFAIK, introduced the terms "big-endian" and "little-endian" to the world of computers was "On Holy Wars and a Plea For Peace", by Danny Cohen (April, 1980): http://www.ietf.org/rfc/ien/ien137.txt and it makes explicit reference to Swift. (There might have been a slightly earlier version of this note, but I'd have to go check my hardcopies - something called 'Oceanview Tales' may have included it.) Noel

11 years, 7 months

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Mac G4s available

by nospam212-cctalk＠yahoo.com

I have the follow Mac G4 systems available: 1) Power Mac G4 933 - SuperDrive, VGA/DVI display adaptor, NO RAM and NO HDD. Case has been modified with metal brackets for mounting. Link to specs: http://www.everymac.com/systems/apple/powermac_g4/specs/powermac_g4_933_qs.h tml 2) Power Mac G4 1.25 DP (MDD) - SuperDrive, DVU/Apple Display adaptor, NO RAM and NO HDD. Case has been modified with metal brackets for mounting (looks like racks slides on this one). Link to specs: http://www.everymac.com/systems/apple/powermac_g4/specs/powermac_g4_1.25_dp_ mdd.html 3) Power Mac G4 733 - SuperDrive, SCSI card, 1 gig RAM, NO Display adaptor and NO HDD. Standard case. Link to specs: http://www.everymac.com/systems/apple/powermac_g4/specs/powermac_g4_733.html If anyone is interested in these, contact me off list and we can discuss them. I may have some more to offer up soon, have to finish reviewing them. If I don't hear from anyone in a few days I'll send them to recycle as I need to clear them out. Thanks. David Williams www.trailingedge.com

11 years, 7 months

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SMD replacement options?

by earl＠baugh.org

Howdy, In my restoration work on the Sun 1's I'm working with, I'd like to find a "modern" drive replacement (to allow me to boot the box, so I can cut down on the wear and tear on the original drive...it does still work, but like to not use it all the time). I've seen other adapters for various other protocols (i.e. SCSI and IDE) that allow for either SD card or CF cards to be used as drives. I'm wondering if such a beast exists for an SMD drive that would work with the xy controllers I have. I do have one or two SCSI controllers (but not enough for all of my multibus machines) so I have that partial answer. But I have a bunch of xy controllers that are were what were there originally... so I'd like to stay with that if I can... Thanks Earl the Squirrel

11 years, 7 months

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LogiTec MouseMan Mm ecg g

by abs＠absd.org

Mm On 26 Nov 2014 20:25, "Bill Machacek" <wmachacek at q.com> wrote: > I have a couple of them, both untested. Let me know where you are and I'll > send you one. No charge if you're in the US. > > > > Bill Machacek > > Colo. Springs, CO > > > >

11 years, 7 months

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Available: Datapoint 1500 and 80's Compaq Deskpro available in Forth Wayne, IN

by tosteve＠yahoo.com

I received this email, in case anyone's interested in these systems. The DataPoint is not the earliest 2200 system. Contact Laura below if interested. ----------------------------------------------------------------- > > I was wondering if anyone there would be interested in a Datapoint 1500 from the 70?s and a > Compaq Deskpro from the 80?s. Not sure if the Compaq fires up, but I do know the Datapoint > turns on (fan fires up), but nothing comes up on the screen.> > I?m located in Fort Wayne, Indiana. > > Laura Thoma-Dickinson > corychapin at aol.com > >

11 years, 7 months

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LogiTec MouseMan Mouse

by wmachacek＠q.com

I have a couple of them, both untested. Let me know where you are and I'll send you one. No charge if you're in the US. Bill Machacek Colo. Springs, CO

11 years, 7 months

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Clueless eBay buyers

by jnc＠mercury.lcs.mit.edu

Check out: http://www.ebay.com/itm/251721536445 Douglas Electronics has them, brand new, for $60... Noel

11 years, 7 months

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Clueless eBay buyers

by jnc＠mercury.lcs.mit.edu

> From: Peter Corlett > it's not at all obvious whether douglas.com even ships to > non-businesses They do; they're happy to take a credit card. I have purchased items from both Douglas and this eBay seller, and although I can't speak to their international service, there wasn't much between them in terms of either cost or speed. Noel

11 years, 7 months

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mainframes and other stuff

by wdonzelli＠gmail.com

> Let's say that a Pentium Pro has a third of a gram; a troy ounce is > 31.1 grams; so 94 Pentium Pro to the troy ounce; 4.5 pounds is about > 65 troy ounces; so 6,182 Pentium Pro might have that much gold. There are 12 troy ounces to the pound, not 16. Anyway, yes, you are talking about something like 4800 PPros equivalent. Now compare the plated surface areas of a PPro compared to a number of the pins on the backplane - you will find that a gold plate area on a PPro (mind you, there is a fair amount under the cover, too) equates to a surprisingly small amount of old IBM backplane pins. Remember, the pins are long, and plated on four sides - and probably had a thicker plate that on PPros. And yes, the 75 was a really huge machine. Gold on the backplanes, gold on the connectors (early Bus&Tags have a very heavy plate), gold in transistors. I would not be surprised if there was gold in the lamp sockets. -- Will

11 years, 7 months

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Alpha and VAX Available in Sweden

by pontus＠Update.UU.SE

Hi all I need to free up some space for new interesting things comming in. So after much thinking I'm letting these machines go: VAX 11/750 (Complete, some spares, needs love) Alphaserver 1000 4/233 (Broken PSU) Alphaserver 2100 5/300 (Deskside, one CPU) Alphaserver 8200 5/300 (fullsize rack: http://www.pdp8.se/bild/sthlm_haul/as8200.jpg) DEC 4000 AXP (http://www.pdp8.se/bild/sthlm_haul/axps_small.jpg) One caveat: I don't need all that space, so if the 11/750 goes the AS8200 can stay. The things are free if you pick them up. But I'm flexible when it comes to shipping but make me an offer that makes it worth it to me. Trades for smaller things or things with blinkenlights are welcome. I'm also selling Two MicroVAX 3500 in BA213 with two DSSI disk cabinets (R215F). Timeframe: I'd really like the things gone before March next year but I'm flexible here also. /P

11 years, 7 months

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Who's rewired their house for this hobby?

by kspt.tor＠gmail.com

On 25 November 2014 at 21:17, Eric Smith <spacewar at gmail.com> wrote: > On the other hand, distributing three-phase to residences, while great > for people with shop equipment or old computers, seems like expensive > overkill for normal homes. I don't know the reasoning for Germany, but in my town in Norway it was apparently used in order to reduce costs, actually. Traditionally 3-phase in Norway has been distributed with 3, not 4 wires: If balanced, earth return current is zero. Some years ago the Norwegian system was unified with what's standard in most of EU, I'm not sure if things changed then (but at least in the past there was no 'neutral' and 'live' in a home - both wires were equal in that respect, and the voltage to earth was never 220V (as we used back then, now it's 230V), it could vary but was in practice never more than 160V, normally just 120V. Less of a jolt than if you touched both wires. Wire to earth accidents is a much more common affair than wire-to-wire accidents). Anyway, I'm not an expert on this so as I said I'm not certain if the policy of using only 3 wires has changed - but at least with that system, distributing 3-phase means that you could transport 200% more effect with only one additional wire. Even with four wires it pays off. And that's why it was done AFAIK. [In addition it seems that feeding 3-phase all the way to the consumer is nearly 'free' with TN, see below] (Reading up on this a bit - apparently the traditional Norwegian power distribution system was called 'IT', Isolated Terra, while new and refurbished areas are now using TN, Terra Neutral (400V), the system which is now common in Europe. What impact this has for the jolt when you touch the wire I'm not sure about [update: Ouch, you'll get 230V to earth], but apparently TN is what makes it feasible to distribute 3-phase to every house. With the older IT system the (then) 3-phase 380V system had to be installed separately. With TN you get both 230V and 400V directly available for the consumer. But I think you'll need 4 wires in practice. It still pays off, economically.] Now I slowly retract my steps back to the more familiar lower-voltage DC land where I feel on more solid ground.. :-) -Tor

11 years, 7 months

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Digest Size?

by shawn-gordon＠cox.net

i wish I could even get back on the digest, I followed the instructions and it didn't work, none of the commands to the listsreve worked other than the 'help' one, I'm getting a ton of emails and need to get back to digest. On 11/25/2014 5:12 PM, Jay West wrote: > That's funny... about two weeks ago, someone said "hey, the digest size is really small, can you increase it so the entire day fits in one digest?" > > -----Original Message----- > From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Earl Baugh > Sent: Tuesday, November 25, 2014 3:43 PM > To: cctalk at classiccmp.org > Subject: Digest Size? > > I get CC talk in a digest form and just recently the size per digest is crossing the boundary where GMail will "chop" the end of the digest. This seems to be a recent occurrence...so wondering, is this something Jay would > need to change, or is this something I can change? I didn't see where I > could change it (maybe I'm just missing the setting...or misinterpreting > something...) > > Earl > > > >

11 years, 7 months

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Digest Size?

by earl＠baugh.org

I get CC talk in a digest form and just recently the size per digest is crossing the boundary where GMail will "chop" the end of the digest. This seems to be a recent occurrence...so wondering, is this something Jay would need to change, or is this something I can change? I didn't see where I could change it (maybe I'm just missing the setting...or misinterpreting something...) Earl

11 years, 7 months

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Anyone Near Los Gatos, CAL? $$ for Serial Printer Repair

by billdeg＠buzz1.com

$$ Printer Repair in Los Gatos, CA $$ Anyone in Los Gatos CA area looking for an emergency repair job? I was contacted by a travel agency who needs their Texas Instruments RO 810 printer repaired. The problem is that the printer does not respond to prints sent to it, although the lights are all normal indicating READY. They're using the Apollo system but I don't know what kind of computer or terminal they have hooked up to the printer. The RO 810 is just a receive only serial printer, essentially a one way serial terminal, probably 300-1200 baud. Here is a photo of the same printer I own. I have the manuals, etc. Probably they're also on the web http://vintagecomputer.net/cromemco/system_three/ti_omni_800_810_RO_Terminal .jpg Anyone want to take a stab at it? I can help remotely but I live 3000 miles away. Agency has a backup printer that might work, need someone on site to set up and or swap parts. IF YOU CAN GO TO CUSTOMER SITE (ideally 11/26 or Monday after Thanksgiving), please contact me via vintagecomputer.net/contact.cfm. I will pay whomever helps me as a subcontractor and will assist you by phone as needed. Because I have same printer I can help run compare/contrast testing. Note that printer ribbons for the TI RO 810 and Decwriter II are interchangeable. Bill Vintagecomputer.net/contact.cfm

11 years, 7 months

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