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

by mattislind＠gmail.com

I have what I believe is an unused RA60 head #4. At least the surface looks very clean. Someone has written "RA60 04" on the side of the box. On the top there is handwritten 70-18661-04. https://i.imgur.com/RNK0FOTl.jpg I could use a RL02 or RL01 head as a trade if someone is interested. /Mattis

7 years, 5 months

2
1
0 0

Cleaning out again

by jnc＠mercury.lcs.mit.edu

> From: Mark Tapley > I'm interested in one of the DECServers but Bill says it's big > enough to be in the "pick up only" pile. ... drop it at a Pak/n/Ship or > equivalent to get it headed my way. PakMail will go pick stuff up. If several people get together, they could make only one trip to Bill's, which might reduce the cost. Noel

7 years, 5 months

1
0
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Cleaning out again

by bill.gunshannon＠hotmail.com

Anybody interested in a pair of Tseng Labs ULTRARAM boards? I assume they were expansions for the Tseng Labs Video Cards but, if nothing else, they are loading with 4164's. bill

7 years, 5 months

3
4
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Heathkit H9 schematics wanted

by harten＠injectstar.de

Hi to all! I'm looking for a good scan of the Heathkit H9 schematics. A set of photos, if the document is to large for scanning, would also work for me. Regards Rolf

7 years, 5 months

1
0
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IBM 3270 MCA card available

by mattislind＠gmail.com

I have some kind of IBM 3270 MCA board available for the cost of shipping >from Sweden. IBM P/N 26F0191. Have no way of testing it, but it was pulled >from an otherwise working machine. https://i.imgur.com/jBBDrcnl.jpg /Mattis

7 years, 5 months

2
1
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Rayethon Computer AN/FYK9 CMI Store 33

by justin.keogh＠v6y.net

Anyone know more about this? So far I have only found references to Rayethon Computers in old trade mags. http://v6y.net/IMG_20180912_170812.jpg The rack is as stout as it gets. BTW if anyone wants a nice RXO2 (auction ending in 6 hours), bidding starts at $1: https://www.ebay.com/itm/202440567768 Cheers! -Justin

7 years, 5 months

10
16
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SPACEWAR! Switch Boxes for a PDP-12

by anders＠abc80.net

> Date: Mon, 24 Sep 2018 12:26:57 -0600 > From: Eric Smith <spacewar at gmail.com> > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Subject: Re: SPACEWAR! Switch Boxes for a PDP-12 > Message-ID: > <CAFrGgTS=XdctKw6G_FjddnLc6H=gpgf5JizV9zRXY4C0qhoYyg at mail.gmail.com> > Content-Type: text/plain; charset="UTF-8" > > On Mon, Sep 24, 2018 at 11:23 AM, Robert Feldman via cctalk < > cctalk at classiccmp.org> wrote: > >> >that is what the PDP-1 at CHM has been using for over 10 years >> >> https://na.suzohapp.com/products/pushbuttons/58-9166-L > > > Ken Sumrall built the Spacewar control boxes used at the museum, with some > suggestions from me. We originally intended these to be temporary, and to > build nicer control boxes later. Since they were intended to be used by > restoration team members, and possibly museum guests, we wanted them to be > reliable rather than authentic, and specifically did NOT want these > temporary boxes to themselves become historical artifacts. We chose > inexpensive but robust arcade pushbuttons. They can take a beating, and in > the event that the microswitch does break or wear out, it can easily be > replaced, though the complete button assembly with microswitch is not > expensive. The boxes are particle board. We used DE-9 connectors. On the > PDP-1, hyperspace is invoked by the CW and CCW rotate controls being > activated simultaneously, so the hyperspace button is wired via series > diodes to both rotate buttons. > > After we built them, Steve Russell pointed out to us that although these > boxes don't look like at all like the originals, they actually are > authentic, in the sense that like the originals, these boxes were quickly > knocked together rather than carefully planned, and are functional rather > than pretty. > > We positioned the individual buttons based on the layout used on one of > the > Atari coinop games, "Space Duel" IIRC, on the because Atari had done a > good > job of laying them out to be easy to use. > > I'm not trying to discourage anyone from trying to make replicas of the > original Spacewar control boxes, but aside from some grainy photos and a > brief description, not much detail about them is actually known. > > We do not know what controls were used when PDP-1 Spacewar was > demonstrated > at the Computer Museum in Boston. We don't think they had the original > control boxes. Possibly they might have just used the PDP-1 console > switches, which is quite inconvenient and increases wear on those > switches. When we restored the PDP-1, we discovered that some of the > console switches were flaky, and upon inspection, that they appeared to > have been replaced multiple times, with suboptimal craftsmanship. > I like the ideas with the diodes for hyperspace, I'll steal that right away!

7 years, 5 months

1
0
0 0

Rayethon Computer AN/FYK9 CMI Store 33

by gerardcjat＠free.fr

@ Chuck, I know you know about the FST1 computer ( 24 bit ). Do you know that there is ( now ?? ) a bit of documentation about it on Bytesavers ?? in .... PDF/Fairchild/Sentry ....

7 years, 5 months

2
1
0 0

Fall cleaning - 9-track drives available

by bobalan＠sbcglobal.net

I have four 9-track tape drives, and a dirty DEC rack, that I need to get rid of. Two of the drives are HP 7970B's. One has the door unattached. Then there's a Kennedy 9100 800/1600 bpi drive. Very heavy.? As found, none tested by me. Just don't have time to play with them. Last is a CDC drive complete with an AST clone PC with an Overland Data controller and software. This was running a few years ago but has not been used since. Has Media Master format conversion software also. There's also a smallish DEC rack. Could use the top painted but otherwise not too bad. Includes four sets of rack slides. All are located in Santa Cruz, CA and need to be gone soon, I need the room in my hangar. Come get them! Photos here: http://dvq.com/fall_cleaning/ -- Vintage computers and electronics www.dvq.com www.tekmuseum.com www.decmuseum.org

7 years, 5 months

5
10
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SPACEWAR! Switch Boxes for a PDP-12 (Bob Rosenbloom)

by michael.99.thompson＠gmail.com

> > From: Bob Rosenbloom <bobalan at sbcglobal.net> > Subject: Re: SPACEWAR! Switch Boxes for a PDP-12 > > How about these? They look close, but are still a bit expensive. > > > https://www.ebay.com/itm/VINTAGE-SWITCHCRAFT-60312DL-MOMENTARY-SWITCH/25358… > > Bob > I bought 5x of them. They are the locking style that we don't want, but I think that we can bend the angled part to make them momentary. Thanks for the help! -- Michael Thompson

7 years, 5 months

1
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SPACEWAR! Switch Boxes for a PDP-12

by r_a_feldman＠hotmail.com

>Message: 13 >Date: Sun, 23 Sep 2018 10:53:20 -0700 >From: Al Kossow <aek at bitsavers.org> > >On 9/23/18 7:46 AM, Michael Thompson via cctech wrote: >> Before we cave >> in and buy some modern C&K toggle switches > >ugh > >use black arcade pushbuttons > >that is what the PDP-1 at CHM has been using for over 10 years https://na.suzohapp.com/products/pushbuttons/58-9166-L Bob [http://na.suzohapp.com/images/50/58-9166-L.png]<https://na.suzohapp.com/products/pushbuttons/58-9166-L> Black Pushbutton w/ .187 Horizontal Microswitch - 58-9166-L<https://na.suzohapp.com/products/pushbuttons/58-9166-L> Black Pushbutton w/ .187 Horizontal Microswitch na.suzohapp.com

7 years, 5 months

2
1
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DEC backplanes on eBay

by jnc＠mercury.lcs.mit.edu

Anyone recognize these: https://www.ebay.com/itm/183446161463 They've got a fair amount of wire-wrap, so I'd think 70's-80's. Noel

7 years, 5 months

2
1
0 0

Floating point math in FORTRAN IV on PDP-8

by kylevowen＠gmail.com

At VCF MW this past weekend, I was playing around with an FPP8/A stuffed into a PDP-8/M with a fan removed. This hex-wide two-board set will happily work in a quad-wide backplane, as it needs no signals that an 8/A would otherwise provide. I wanted to benchmark the FPP8/A with the software emulation that FORTRAN IV supposedly does. Mind you, I also don't have an EAE in mine, so software emulation for integer multiplication/division would also be used. I tried running a simple program to print some natural logs and square roots, which ran quite well with the FPP8/A in place. Without the FPP8/A...all of the results were wrong. Significantly. Negative numbers in many cases. No clear pattern as to what it's doing. Would anyone be able to try my program on some other real hardware (or another emulator) to verify? With and without EAE would also be desirable. I'm not sure how to disable the EAE in SIMH, else I'd try that too. Here's what SIMH looks like with my program: PDP-8 simulator V4.0-0 Current git commit id: d35b8725 sim> at rk0 disk2.fortran.rk05 sim> b rk .TYPE FLOAT.FT DO 50 I=1,100 F = FLOAT(I) G = SQRT(F) H = ALOG(F) WRITE(4,100) F,G,H 50 CONTINUE 100 FORMAT(' ',F12.6,F12.6,F12.6) END .R F4 *FLOAT/G$ 1.000002 1.000002 0.000000 2.000002 1.414215 0.693147 3.000002 1.732053 1.098614 4.000002 2.000002 1.386296 5.000002 2.236070 1.609439 [snip] 98.000001 9.899495 4.584968 99.000000 9.949874 4.595121 100.000023 10.000008 4.605171 . Much appreciated, Kyle

7 years, 5 months

5
8
0 0

DEC H744 +5 supply

by jnc＠mercury.lcs.mit.edu

> From: Brent Hilpert > Your conceptualisation around the role of electrons is perhaps a > little off. Well, I'm not taking into effect things like the velocity of electrons passing around the circuit (more current, with the same number of electrons, effectively), etc, but I value the 'electron-based-view' since it led me to understand the issue of EI conversion (something I don't recall having seen called out explicitly - e.g. it's not in that DEC tech manual). (Speaking of reducing the number of electrons: I recall a physicist - don't recall who - who jokingly suggested the reason they are all identical is that there is only _one_ - it travel forward in time an an electron, goes back as a positron; rinse, repeat! :-) > You don't need 'more' electrons to generate a higher current, you just > need to 'expend them' more quickly, using words like 'more' and > 'expend' loosely Right, particularly since what's really happening (e.g. during the L discharge phase) is that electrons are being 'borrowed' from the shells in the atoms of the conductor, run around the circuit, and then returning from whence they came. > Capacitors very much play a role in supplying current to the load. > Both the L & C play a role as energy reservoirs. Right, but the C doesn't play a _direct_ role in the EI conversion, the way the L does? (Or maybe it does - the voltage across the C could I guess play a role in mobilizing electrons in the circuit?) >>> The transformer is nonetheless much smaller than it would be in a >>> straight linear regulator design because the secondary current it has >>> to supply is several factors lower than for a comparable linear reg. >> That's because of the higher efficiency of this circuit .. ? > primarily it's because it's still a higher voltage by several multiples > ... and thus the current that the transformer secondary has to deal > with is the same factor lower .. meaning less copper for the secondary > and less iron for the core. Ah. Interesting tradeoff! So it seems like they probably picked the intermediate voltage to be as high as they could (to reduce the transformer cost), modulo the cost/availablility of transistors for the switching... > I haven't seen/read this TofOp. Here: http://www.bitsavers.org/pdf/dec/pdp11/1140/1140_SystemManual.pdf if you're (still) interested; the H744 starts on pg 6-10 (pg 112 of the PDF). Noel

7 years, 5 months

1
0
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Floating point math in FORTRAN IV on PDP-8

by engwalljonathanthereal＠gmail.com

Maybe you don't want to fix your program. On September 19, 2018, at 5:46 PM, Michael Zahorik via cctalk <cctalk at classiccmp.org> wrote: Kyle, I have not run my machine since March. Summer is car season. But I thought that maybe I could run this little program quickly. My PDP8E started up, loaded the RIM and SERIAL DISK then OS/8 ran. Everything looked good, BUT...... something is wrong with my FORTRAN 4. Programs seem to compile, but I can't even run a simple test program that prints out whatever I enter from the TTY. Something has gone south. Anyway, I'm not familiar with the command FLOAT(). Do I have to have floating point hardware to use this? Well.... either there is something wrong with my machine or more likely with my FORTRAN software or even more likely operator error (me). So many times after a long summer I have to re learn most of what I learned last winter. Kinda of like when I was in school after summer vacation. ?Mike Zahorik (414) 254-6768 From: Kyle Owen via cctalk <cctalk at classiccmp.org> To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> Sent: Wednesday, September 19, 2018 5:43 PM Subject: Floating point math in FORTRAN IV on PDP-8 At VCF MW this past weekend, I was playing around with an FPP8/A stuffed into a PDP-8/M with a fan removed. This hex-wide two-board set will happily work in a quad-wide backplane, as it needs no signals that an 8/A would otherwise provide. I wanted to benchmark the FPP8/A with the software emulation that FORTRAN IV supposedly does. Mind you, I also don't have an EAE in mine, so software emulation for integer multiplication/division would also be used. I tried running a simple program to print some natural logs and square roots, which ran quite well with the FPP8/A in place. Without the FPP8/A...all of the results were wrong. Significantly. Negative numbers in many cases. No clear pattern as to what it's doing. Would anyone be able to try my program on some other real hardware (or another emulator) to verify? With and without EAE would also be desirable. I'm not sure how to disable the EAE in SIMH, else I'd try that too. Here's what SIMH looks like with my program: PDP-8 simulator V4.0-0 Current? ? ? ? git commit id: d35b8725 sim> at rk0 disk2.fortran.rk05 sim> b rk .TYPE FLOAT.FT ? ? ? DO 50 I=1,100 ? ? ? F = FLOAT(I) ? ? ? G = SQRT(F) ? ? ? H = ALOG(F) ? ? ? WRITE(4,100) F,G,H 50? ? CONTINUE 100? FORMAT(' ',F12.6,F12.6,F12.6) ? ? ? END .R F4 *FLOAT/G$ ? ? 1.000002? ? 1.000002? ? 0.000000 ? ? 2.000002? ? 1.414215? ? 0.693147 ? ? 3.000002? ? 1.732053? ? 1.098614 ? ? 4.000002? ? 2.000002? ? 1.386296 ? ? 5.000002? ? 2.236070? ? 1.609439 [snip] ? 98.000001? ? 9.899495? ? 4.584968 ? 99.000000? ? 9.949874? ? 4.595121 ? 100.000023? 10.000008? ? 4.605171 . Much appreciated, Kyle

7 years, 5 months

1
0
0 0

DEC H744 +5 supply

by jnc＠mercury.lcs.mit.edu

> From: Brent Hilpert > In typical "down-converters" there are additional current paths in the > supply, paralleling the input path, that can provide the 'additional' > electron flow rate. ... the whole rationale of a switching supply is to > use time (varying switching periods) and temporary energy storage to > change that EI relationship from input to output without energy loss. So, two more questions (if you have the time): I can see that there's a nice synergy between the switching concept and the buck converter (since the switch does exactly what the buck converter needs, in terms of turning the input current off and on), _but_ - are there switching supplies that operate the way I described (up-convert the frequency, then use a transformer to get directly to more or less the right voltage)? I.e. without needing to use a buck converter to do the conversion from low current at higher voltage to higher current at lower voltage? (Although I guess the coil for the buck might be cheaper than the transformer - even though the use of a high frequency would reduce the size of the latter - making the buck approach superior.) To put it another way, there's no _necessary_ connection between the switching concept, and the buck converter is there? Does that mean it is in theory possible to stick a buck converter on the output of a linear supply to do the V1I1-> V2I2 conversion? (Although I know it's probably a stupid design, because you'd still need some sort of switcher for the buck converter, so the linear supply would be basically pointless.) > If the heatsinks seem huge compared to modern day supplies, that's more > likely the result of technology improvements - faster devices, and > moving from bipolar switching transistors to mosfets. Bipolar > transistors have a near-fixed voltage drop which can't be reduced Right, I knew bipolars had the fixed drop, but I hadn't made the connection to that being the cause of the large amount of heat needing to be dumped. Useful enlightenment! > If you supply a link & location to a schematic I'll take a look Here: http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/jpg/H744.tif http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/jpg/H744.jpg Thanks to everyone for taking the time and energy to reply! Noel

7 years, 5 months

3
3
0 0

looking for out-of-print computer book

by billr＠giantstepsmts.com

Hi folks, I am trying to find an out-of-print tech book for a research project I'm doing. The book is called Porting Macintosh Applications to Windows 95 and NT by Greg Stone, dated December 1996, ISBN 0471118516, published by Wiley. It's listed on Amazon but not available; I've searched on <http://usedbooksearch.net/> usedbooksearch.net and even WorldCat, with no luck. Wondering if anyone has any ideas how I could find a copy? Figure someone on this list could point me in the right direction. Would love any help. Thanks, * Bill. Bill Rosenblatt GiantSteps Media Technology Strategies 157 Columbus Ave., Suite 409 New York, NY 10023 (212) 956-1045 Skype: billrosenblatt Twitter: @copyrightandtec Blog: https://copyrightandtechnology.com/ LinkedIn: https://www.linkedin.com/in/billrosenblatt/ Forbes: https://www.forbes.com/sites/billrosenblatt/

7 years, 5 months

7
6
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SPACEWAR! Switch Boxes for a PDP-12

by michael.99.thompson＠gmail.com

Visitors to the RICM like to play SPACEWAR! in the PDP-12. Unfortunately using the console switches is uncomfortable, not intuitive, and is tough on the switches. We would like to recreate the switch boxes used on the PDP-1 to make playing a better experience. We modified the source <http://www.ricomputermuseum.org/Home/equipment/dec-pdp-12/dec-pdp-12-source…> >from D.E. WREGE <http://www.pdp8.net/pdp8cgi/os8_html/SPCWR3.PA?act=file;fn=images/jby/jbyos…> to use the LINC SXL instruction to read the PDP-12 GPIO signals, and prototyped two switch boxes using recycled toggle switches. This works great, so now we need to make better switch boxes. This CHM article shows what we want to recreate. <http://www.computerhistory.org/pdp-1/a87ddd9510aeebf6485c47a35f8a26aa/> This article shows a sketch of the switch boxes. <http://thedoteaters.com/?attachment_id=6416> A generous donor made these boxes for us. <https://scontent.fbos1-1.fna.fbcdn.net/v/t1.0-9/37971884_2342940525721951_2…> The lever switches are turning our to be difficult to find at a reasonable price. We found some NOS SwitchCraft lever switches that looked like the sketch and the PDP-1 pictures and were a reasonable price, but our order was rejected because they only had one in stock. eBay has Mossman and SwitchCraft, but they are either very expensive (more than $50 each), or they only have one available. The switches that we are looking for need to be SPDT, three-position, non-locking, center off. (If the switches have more than one pole we can remove the extra poles to keep the operational force low.) Before we cave in and buy some modern C&K toggle switches, does anyone have a source for Mossman or SwitchCraft switches at a reasonable price? -- Michael Thompson

7 years, 5 months

5
5
0 0

DEC H744 +5 supply

by jnc＠mercury.lcs.mit.edu

> From: Brent Hilpert > With the given 20-30VAC input (do I have that right?) Yup. > A glance at the schematic ... you might think it's just a linear > regulator And the writeup in the maint manual gives that impression too, which didn't help! (Hence my assumtion that it was acting in the way a plain linear regulator might, in terms energy efficiency.) > Diode D5 provides the current path for L1 to supply energy to the load > when the source is switched off. Right. What is the role of the pair of big caps, C8/C9. Is that just to filter ripple, or do they play a role in the provision of current when the supply is switched off (by Q2)? (My guess would be only the former, since unlike the energy stored in L1, which can be used provide electrons when Q2 is off, capacitors only store electrons, so they can't play much of a role in the conversion of V1I1 to V2I2, which requires 'creation' of more electrons when I2>I1. Oh, reading the maint manual, when Q2 is on, they store some of the current coming through L1. So I guess they have a peripheral role in the overall operation.) > The subtle thing about designs like this is where does the switching > oscillation come from?, as there is no obvious oscillator present. The maint manual does cover that. It more or less says that as the output voltage rises through 5.05V, the voltage regulator turns off Q2, and as it falls through 4.95, it turns it back on. (Presumably when the whole works is first turned on, the output voltage is less than 4.95V, so Q2 stays on until it gets to the turn-off voltage.) Q7 is part of the over-current sensing, it says. > the switching is taking place after the transformer rather than > straight off the mains, this allows the switcher design to be simpler > and get away with using much lower voltage semiconductors. Ah, I was wondering about why they did it that way. > The transformer is nonetheless much smaller than it would be in a > straight linear regulator design because the secondary current it has > to supply is several factors lower than for a comparable linear reg. That's because of the higher efficiency of this circuit, as opposed to a straight linear regulator, which would need more mains power in to produce an equivalent power out? > Q5 is functioning as a common-base stage in the driver chain ... > It is not part of the +15V supply to the 723, that is provided by > R2, zener D2, C2. I was confused by the maint manual, which says "D2 is used with Q5 and R2 to provide +15V to E1". > There are a thousand configurations for power supplies possible > depending on what needs to be accomplished ... It's useful to keep in > mind that regulation and EI conversion are different objectives but > they can be achieved either separately or in concert. Got it. > bipolars have a fixed MINIMUM drop, which can be used in a switching > supply to as much advantage as possible with bipolars, but have a > varying drop in a linear regulator Right. OK, I think I've got a decent grip on all this now - although I still wouldn't want to try and _repair_ one... :-) Noel

7 years, 5 months

2
1
0 0

SPACEWAR! Switch Boxes for a PDP-12

by anders＠abc80.net

> Date: Sun, 23 Sep 2018 10:46:48 -0400 > From: Michael Thompson <michael.99.thompson at gmail.com> > To: cctech <cctech at classiccmp.org> > Subject: SPACEWAR! Switch Boxes for a PDP-12 > Message-ID: > <CAH1BU=_4OVdEjGgMMcbyLZS9-aDCXp0sZxh1SiEJrtsuWu96Pw at mail.gmail.com> > Content-Type: text/plain; charset="UTF-8" > > Visitors to the RICM like to play SPACEWAR! in the PDP-12. Unfortunately > using the console switches is uncomfortable, not intuitive, and is tough > on > the switches. We would like to recreate the switch boxes used on the PDP-1 > to make playing a better experience. > > We modified the source > <http://www.ricomputermuseum.org/Home/equipment/dec-pdp-12/dec-pdp-12-source…> > from D.E. WREGE > <http://www.pdp8.net/pdp8cgi/os8_html/SPCWR3.PA?act=file;fn=images/jby/jbyos…> > to use the LINC SXL instruction to read the PDP-12 GPIO signals, and > prototyped two switch boxes using recycled toggle switches. This works > great, so now we need to make better switch boxes. > > This CHM article shows what we want to recreate. > <http://www.computerhistory.org/pdp-1/a87ddd9510aeebf6485c47a35f8a26aa/> > This article shows a sketch of the switch boxes. > <http://thedoteaters.com/?attachment_id=6416> > A generous donor made these boxes for us. > <https://scontent.fbos1-1.fna.fbcdn.net/v/t1.0-9/37971884_2342940525721951_2…> > > The lever switches are turning our to be difficult to find at a reasonable > price. We found some NOS SwitchCraft lever switches that looked like the > sketch and the PDP-1 pictures and were a reasonable price, but our order > was rejected because they only had one in stock. eBay has Mossman and > SwitchCraft, but they are either very expensive (more than $50 each), or > they only have one available. > > The switches that we are looking for need to be SPDT, three-position, > non-locking, center off. (If the switches have more than one pole we can > remove the extra poles to keep the operational force low.) Before we cave > in and buy some modern C&K toggle switches, does anyone have a source for > Mossman or SwitchCraft switches at a reasonable price? > > -- > Michael Thompson Michel, I did just what you did for being able to play Spacewar! on my PDP-8a (I have KK8E with EAE, VC8E and the DK8E real time clock). But since the frontpanel doesn't have proper switches for the switch register I had to build game hand controls. I built them just like those that can be spotted in the video from CHM: https://www.youtube.com/watch?v=1EWQYAfuMYw but smaller. I just used ordinary arcade style buttons and connected them to the digital inputs on the DKC8A board and modified the source code for that. Those hand controls have two switches for rotate left/right, one for fire and one for acceleration. The last one is for hyper speed but that is triggered by pressing left/right switches at the same time. I intended to fix this so it should be triggered by the last button but never came to it. Unfortunately I haven't written on my page https://www.pdp-9.net/pdp-8a on this yet... /Anders

7 years, 5 months

1
0
0 0

HP CPU32 Emulation Adapter

by jzatar2＠illinois.edu

Hello everyone, This is a longshot, but I was wondering if anybody has or knows someone who might have a very specific HP part. It's the HP E3417A, a PQFP132 PGA interposer for some HP emulation/debug preprocessor stuff for CPU32 (among other 132 pin QFP). Basically I came into an HP logic analyzer with a full preprocessor setup for 160 pin QFP CPU32 procs. 16700A with emulator option, E2480A preprocessor for CPU32, and a 160 pin QFP elastomeric socket with the flex cable. But, I've got one of these: https://hackaday.io/project/6150-beckman-du600-reverse-engineering That board has a 132 pin QFP, but with the right adapter, it should be supported by the hardware I've got here. Thanks, Joe Zatarski

7 years, 5 months

2
4
0 0

Looking for a TURBOchannel Extender Cable

by robert.jarratt＠ntlworld.com

I have finally fixed the PSU of my TURBOchannel Extender (https://robs-old-computers.com/2018/09/23/h7826-power-supply-repaired/). Which means that now I would like to connect it to my DECstation 5000/240. I need the relevant extender cable, which I believe to be a BC12N or a 17-03335-01. I asked on this list about a year ago if anyone has such a cable and thought I would try asking again. I have found a 100-pin SCSI cable that mechanically fits, but I don't know if that has the correct pin assignments. I am aware of a site in the UK which lists this cable (http://refurb.icc4it.co.uk/parts/legacy/dec/17-03335-01) but it looks like one of those sites that speculatively lists things without necessarily stocking them, and it is likely to charge business prices anyway. So, two questions: 1. Could the 100-pin SCSI cable do the job? 2. Anyone have a genuine cable going spare (ideally in the UK). Regards Rob

7 years, 5 months

1
0
0 0

Manual for Documation TM200 punched card reader

by guykd＠optusnet.com.au

Hi Mike, At 10:18 PM 22/09/2018 -0400, you wrote: > From outward appearences, it looks to be the same as the Wang 2244A, and >the Wang Model 2200 Systems Mainteance Manual confirms that it is a TM200: > >http://www.wang2200.org/docs/system/2200_SystemsMaintenanceManual(redone).0… What an excellent list this is. Who else would have spotted that? > A reference manual and data sheet are available on the Wang 2200 site: > >http://www.wang2200.org/docs/peripheral/2234A_2244A_CardReaderRefManual.700… >https://www.wang2200.org/docs/datasheet/2244A_CardReader_DataSheet.700-3524… Lots of interesting information on card coding and usage, thanks. Heh. Every single time I hear the name Wang, I'm reminded of the legendary time Wang showed up at an Australian computer trade show, with their staff all wearing badges that said "WANG CARES" You have to say it with an Aussie accent and know the local idiom to understand why it's side-splittingly funny. > > No schematics, though. There's the rub. Fingers crossed Al Kossow can find that original copy. Regards, Guy

7 years, 5 months

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Advice requested on proper disposal of Seagate ST3000DM001 disk drives

by jnc＠mercury.lcs.mit.edu

> From: Alexandre Souza > What about a nuclear bomb? OK, if we're going to start being _really_ silly..... drop them into a singularity! :-) The best part is that you'll get to watch them being ripped apart and destroyed by tidal forces _forever_ (since time dilation means that as they go over the event horizon, their local time seems to stop compared to ours). Noel

7 years, 5 months

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VCFMW

by jwest＠classiccmp.org

Once again. Silent700 put together an incredible show for the Midwest computer festival in Elk Grove. Every room that was rented was almost overflowing most of the show, so I suspect attendance was great. I heard a lot of good feedback on the speakers and presentations, and I also noticed that the auction pile was bigger than each previous year. I'm not sure which exhibit was my favorite, could be Pat's AVLVAX or Mikes HP3000 - but I also seem to have spent more time than usual at all the C64, A2+, and TRS80 machines. Maybe I'll take a detour to the 8-bitters in my collection for the near term, we'll see! In addition to the show, there were multiple parties and some late nights spent hanging out with the folks I mostly get to see once a year so friendships were renewed and such! Midwest is definitely a really fun show, I strongly encourage anyone who hasn't been to come out next year. Silent700 and helpers (mike et. Al.). thank you so much for your untiring devotion to making Midwest such a great show. J

7 years, 5 months

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ISO Moto Exorciser and EXORterm docs

by aek＠bitsavers.org

I spent some time this weekend documenting the hardware of these and dumping some more MDOS floppies. We had one copy of the MDOS manual which replaced the poor copy I had in bitsavers.org/components/motorola/6800/exorciser. It would be nice to find more/better docs, esp docs on the EXORterm 150 or 155. The terminal has a keytronics kb .ca 1978, of course all the foam was crumbled.

7 years, 5 months

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Barnett Instruments AN/URM-105C Multimeter

by charles.unix.pro＠gmail.com

I spotted a vintage multimeter in an antique shop in Startup WA for $24. Didn't have a chance to test it, but it looks in good condition under the cover. https://photos.app.goo.gl/sTQF8g7jXx2TMKqCA If someone wants it, I would be happy to acquire and ship it at cost. -- Charles

7 years, 5 months

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Manual for Documation TM200 punched card reader

by guykd＠optusnet.com.au

Thanks for the link. So far I'd only tried google, assuming anything relevant on bitsavers would show up. It didn't, which is interesting. My search was only very brief though. I'd been doing an initial eval on the reader in the evening, then read the post about Mr Hollerith's house. So hadn't yet done any serious searching. The unit was made in April 1977. Someone else mentions the TM200 is not the same as the M200, so I have some reading to do. Regards, Guy At 09:52 AM 22/09/2018 -0500, you wrote: >On Sat, Sep 22, 2018 at 9:39 AM Guy Dunphy via cctalk <cctalk at classiccmp.org> >wrote: > >> By coincidence, today I started evaluation of a punched/optical card >> reader. >> Model TM200, made by Documation Inc. >> >> Naturally I have zero information on it so far. >> Does anyone know where I'd find a service manual or schematics? >> > >Did you check Bitsavers already? > >http://bitsavers.org/pdf/documation/ > >Thanks, > >Kyle >

7 years, 5 months

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SMD disk needed

by dseagrav＠lunar-tokyo.net

Does anyone within driving distance of central Illinois have a SMD drive I can borrow for awhile until I can get some kind of SMD emulator working? Anything 450 MB or bigger will do. I need one for the Lambda.

7 years, 5 months

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solaris toolchains

by aek＠bitsavers.org

this info isn't jumping out at me what was the last bootstrapped toolchain (gcc et al) that works on Solaris 2.6? http://jupiterrise.com/tgcware/sunos5.6_sparc/stable/ ??

7 years, 5 months

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Fall cleaning - 9-track drives available

by guykd＠optusnet.com.au

Too far? Road trip? I'm crying here (Sydney Australia.) I have a couple of HP 7970B's (and the sevice manual) though not yet running. But I have no 1600 bpi drives. Oh well... Guy At 01:43 PM 22/09/2018 +0000, you wrote: >I could use a small rack but I think Santa Cruz, CA is a bit too far for >a road trip from NEPA.?? :-)???? (I really regret giving all my racks but one away!!) > > >bill > > >On 09/21/2018 10:44 PM, Bob Rosenbloom via cctalk wrote: >> I have four 9-track tape drives, and a dirty DEC rack, that I need to >> get rid of. >> >> Two of the drives are HP 7970B's. One has the door unattached. Then >> there's a Kennedy 9100 800/1600 bpi drive. >> Very heavy.?? As found, none tested by me. Just don't have time to play >> with them. >> >> Last is a CDC drive complete with an AST clone PC with an Overland >> Data controller and software. This >> was running a few years ago but has not been used since. Has Media >> Master format conversion software also. >> >> There's also a smallish DEC rack. Could use the top painted but >> otherwise not too bad. Includes four sets of rack >> slides. >> >> All are located in Santa Cruz, CA and need to be gone soon, I need the >> room in my hangar. Come get them! >> >> Photos here: http://dvq.com/fall_cleaning/ >> > >

7 years, 5 months

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DEC H744 +5 supply

by jnc＠mercury.lcs.mit.edu

> From: Mattis Lind > The H744 is a buck converter. You can read about buck converters here: > https://en.wikipedia.org/wiki/Buck_converter Wow, that was incredibly hard to read; no clear and simple explanation of the basic concept of how it works, before getting into the details! If I understand it correctly, it stores part of the incoming energy of a block of current in the field around the inductor; later, switches change state to create a loop that includes the inductor, and it uses the stored energy to cause electrons to flow around the new (temporary, because of the switch) circuit. Is that about right? The H744 manual doesn't really talk much about that aspect of the circuit's operation (at least in terms of 'we use this trick to get all the energy out of the incoming current flow'); it just describes the stuff around the coil as "an LC filter". It says "This type circuit is basically only an averaging device", which I wouldn't say is really on point - that would describe my (incorrect) prior description as well as the correct one. And just to make it even more confusing, it says "most of the input voltage is absorbed across the emitter-collector of Q5", but I looked, and Q5 is tiny, and I eventually figured out that that only applies to the +15V needed to run the voltage regulator. Noel

7 years, 5 months

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Advice requested on proper disposal of Seagate ST3000DM001 disk drives

by spacewar＠gmail.com

Anyone have advice on making thermite? Ingredients, sources, proportions? The internet seems to think that just using aluminum powder with ferric oxide is relatively hard to ignite, and that some manganese dioxide would help with that. Without spending too much time shopping, it looks like I can get: * aluminum powder, 5 micron, 2 lb for $34 * ferric oxide, 10 lb for $27 * manganese dioxide, 1 lb for $39

7 years, 5 months

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DEC H744 +5 supply

by jnc＠mercury.lcs.mit.edu

Oh, one thing I forgot to include: > a lot of the incoming power in that 30V AC has to be thrown away, in > producing +5V. So, if my understanding is correct, the 'switching' H744 really isn't much better than a classic linear supply. It still wastes a very large amount of the input power, and it still has a massively heavy transformer in it. Yes? So I wonder what exactly the advantage was in going to the switching approach? Yes, it keeps the output voltage steadier then a pure linear supply could - but I'll bet there are analog approaches that can do the same. (They'd need something that can produce a steady reference voltage, but the switching approach needs, and has, the same thing.) Maybe the main output transistors are happier being full-on or full-off, or something like that? Noel

7 years, 5 months

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Advice requested on proper disposal of Seagate ST3000DM001 disk drives

by jnc＠mercury.lcs.mit.edu

> From: Eric Smith > That's way too good for these *&#$ing ST3000DM001 drives, and won't > provide anywhere near enough sense of satisfaction. https://www.youtube.com/watch?v=Gxm_qpKh7Jw 'Nuff said. Noel

7 years, 5 months

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DEC H744 +5 supply

by jnc＠mercury.lcs.mit.edu

So there's something about the H744 I'm not sure I understand; hopefully those with more analog-fu will set me straight if I'm confused. This supply runs off 20-30V AC. It takes the input AC, rectifies it, and runs it through a cap to filter out the ripple. What's next is that it's an early switching supply; i.e. the electronics inside switches that newly-created main DC off and on very quickly to keep the output voltage at around +5V. However... My understanding is that, without using a transformer (which creates an independent circuit loop - more below), there's no way to increase the _amperage_ out of circuit over what's fed into it: since amps are electrons/second, the electrons/second out more or less have to equal electrons/second in, since one can't easily 'create' electrons - at least, in normal electonic gear! (Transformers, by creating a whole new circuit loop, can 'create' more electrons/second in the new loop; since they tie the 'out' of the new circuit back to its 'in', they can recirculate the 'extra' electrons.) And to the extent that the output is at lower voltage, the energy differential has to be dumped; hence the huge heat sinks - a lot of the incoming power in that 30V AC has to be thrown away, in producing +5V. Right? My (possibly confused) understanding is that later switching supplies take the incoming 60Hz wall AC, transform it to a higher frequency, run _that_ through a transformer (which can be a lot smaller, since it's at a higher frequency, and the higher the frequency, the smaller the transformer you can use - hence the use of high frequency AC in airplanes, to allow use of smaller - and thus lighter - transformers). That then turns out a massive amount of amps in the output loop (since with a transformer, energy out is roughly energy in, modulo resistive losses; and with constant power, if V goes down, I goes up). So the losses are a lot lower - N amps at 110V in produce ~20N amps out at +5V. (Well, depending on all the losses, ~20.) And the whole works is a lot lighter, to boot. Did this programmer get all that analog stuff correctly? Thanks! Noel

7 years, 5 months

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GE2149G206 Bit slice CPU??

by holm＠freibergnet.de

Hi all, I've got an VME Bus sized CPU or GPU Board out of ebay a while before, it is equipped with 4 pcs of AM29203 Slices and an AM2910A Sequencer. It sems to be a german Product. The Sticker on one of the DIN 96 Connectors states: GE2149G206 WNr. 10488 Grund- Baugruppe Does anyone know what it is or where is it coming from? Kind Regards, Holm -- Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe, Freiberger Stra?e 42, 09600 Obersch?na, USt-Id: DE253710583 info at tsht.de Fax +49 3731 74200 Tel +49 3731 74222 Mobil: 0172 8790 741

7 years, 5 months

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HP 2000 /2100 emulator ?

by pete＠petelancashire.com

I will soon have a teletype model 35 all cleaned up and running Why like is some suggestions for something I can put in the base and emulate an HP 2000 or even in modern 2100 my goal is nothing serious I'd love to be able to do HP basic and find the version of Star Trek I think that was the name of the game just show I can demonstrate the friends how cool these machines were. If I could have my dream come true the emulator would be on a little SBC running Linux t Or even a simple OS that upon being powered up it would display login or was that log on on the teletype pretty much having the coat hard-coated but still having an area for saving files. Thanks and thanks for all the previous assistance members of this group of this list have given me

7 years, 5 months

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Advice requested on proper disposal of Seagate ST3000DM001 disk drives

by cym224＠gmail.com

On 20 September 2018 at 23:20, Eric Smith via cctalk <cctalk at classiccmp.org> wrote: > Anyone have advice on making thermite? Ingredients, sources, proportions? > NIST SP 800-88 Rev. 1? There is some milspec about sanding the platters that actually specified what grit to use but I do not remember the title. N.

7 years, 5 months

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Floating point math in FORTRAN IV on PDP-8

by engwalljonathanthereal＠gmail.com

My SIMH resists anything but Adventure, I am working through a Fortran IV. I think you break from the loop and confuse the machine using i. That with some error checking: .TYPE FLOAT.FT ????? DO 50 X=1,100 ????? F = FLOAT(X) ????? G = SQRT(F) IF (G) (11,11,90) 11 WRITE(4,75) G 75 FORMAT(H 5,ERROR) 90?? H = ALOG(F) ????? WRITE(4,99) F,G,H 99?? FORMAT(' ',E12.6,E12.6,E12.6) 50??? CONTINUE WRITE(4,100) F,G,H 100?? FORMAT(' ',E12.6,E12.6,E12.6) ????? END My for fortran IV book and I are the same age,LoL Jonathan Engwall engwalljonathanthereal at gmail.com On September 19, 2018, at 11:10 PM, mark--- via cctalk <cctalk at classiccmp.org> wrote: Hi Kyle Just out of interest I ran this on VAX Fortran (Compaq Fortran 77 6.6-201) and I think got the results expected: $ type for004.dat 1.000000 1.000000 0.000000 2.000000 1.414214 0.693147 3.000000 1.732051 1.098612 4.000000 2.000000 1.386294 5.000000 2.236068 1.609438 ... 98.000000 9.899495 4.584968 99.000000 9.949874 4.595120 100.000000 10.000000 4.605170 However, I am no Fortran expert! Regards, Mark. -----Original Message----- From: cctalk <cctalk-bounces at classiccmp.org> On Behalf Of Kyle Owen via cctalk Sent: Wednesday, September 19, 2018 11:44 PM To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> Subject: Floating point math in FORTRAN IV on PDP-8 At VCF MW this past weekend, I was playing around with an FPP8/A stuffed into a PDP-8/M with a fan removed. This hex-wide two-board set will happily work in a quad-wide backplane, as it needs no signals that an 8/A would otherwise provide. I wanted to benchmark the FPP8/A with the software emulation that FORTRAN IV supposedly does. Mind you, I also don't have an EAE in mine, so software emulation for integer multiplication/division would also be used. I tried running a simple program to print some natural logs and square roots, which ran quite well with the FPP8/A in place. Without the FPP8/A...all of the results were wrong. Significantly. Negative numbers in many cases. No clear pattern as to what it's doing. Would anyone be able to try my program on some other real hardware (or another emulator) to verify? With and without EAE would also be desirable. I'm not sure how to disable the EAE in SIMH, else I'd try that too. Here's what SIMH looks like with my program: PDP-8 simulator V4.0-0 Current git commit id: d35b8725 sim> at rk0 disk2.fortran.rk05 sim> b rk .TYPE FLOAT.FT DO 50 I=1,100 F = FLOAT(I) G = SQRT(F) H = ALOG(F) WRITE(4,100) F,G,H 50 CONTINUE 100 FORMAT(' ',F12.6,F12.6,F12.6) END .R F4 *FLOAT/G$ 1.000002 1.000002 0.000000 2.000002 1.414215 0.693147 3.000002 1.732053 1.098614 4.000002 2.000002 1.386296 5.000002 2.236070 1.609439 [snip] 98.000001 9.899495 4.584968 99.000000 9.949874 4.595121 100.000023 10.000008 4.605171 . Much appreciated, Kyle

7 years, 5 months

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In search of microchannel P390 card...

by ian.finder＠gmail.com

If you have a lead on one, please ping me off-list. I have a very specific project I'm trying to accomplish. thanks

7 years, 5 months

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ISO 70's and 80's coax and twinax terminal docs/brochures

by evanlinwood＠hotmail.com

> I've started to more aggressively archive material on old IBM and compatible coax and twinax I'm not sure if this helps - they seem like they may be in the disposal chain though, might possibly be able to grab manuals if they come up? http://www.a1usedcomputers.com.au/shop/prodList.asp?idCategory=256

7 years, 5 months

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Looking for two DEC H445 power bricks for PDP 11/40 project

by jnc＠mercury.lcs.mit.edu

> From: Pierre Gebhardt > As I don't have core memory modules available, I thought of using MS11 > memory, which, according to my research, seems to be an option for > 11/40 systems. Err, which kind of MS11? There are lots of different ones: http://gunkies.org/wiki/MS11 and they don't all work in every UNIBUS PDP-11! Your options are the -E/-J group, and the -L, but the latter are a bit hard to find, and expensive. (There may be non-DEC equivalents, but I don't know about them.) They all need a MUD backplane such as the DD11-C or DD11-D. (IIRC, the -M has a 'UNIBUS' jumper, but the card uses non-standard voltages on the backplane; 12V instead of 15V, IIRC.) > Does that mean that a single H745 regulator might be sufficient for my > needs? If you're not using a lot of MM11-L, you would definitely only need one H745, no matter what configuration you have. (Note that if you have an old machine/harness, there's a jumper you have to add if you have only a single H745; see the second paragraph on page 6-18 of DEC-11-H40SA-B-D.) Noel

7 years, 5 months

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Apple LaserWriter paper trays

by ball.of.john＠gmail.com

With VCF: PNW six months away I want to try and get something together to make a presence. I am not aware of anyone demonstrating an entire fleet of Apple machines in a configuration as advertised as "The Macintosh Office" at any recent point in history so I thought I should dedicate a table or two to that. A quick inventory tells me I can totally get multiple compact macs, a Macintosh XL, an IBM XT and a netbooting Apple IIe going with a set of common office programs and networked together with a server running Appleshare so that people can play with the software and try a few games over the network. The key component however is I need to get a LaserWriter working and networked as well so people who play with MacPaint for example can print their art out. I have access to four or five printers, of which one will come up reliably and make a presentable attempt of dispensing toner and not leafing roller sludge everywhere however while I can find cassette trays for holding paper I cannot find the two brown paper trays that attached to either side of the printer. I see quite a few on google that are also missing the trays. Would calling them uncommon be correct or might someone have a set they would be willing to part with? -John

7 years, 5 months

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The Ultimate Apollo Guidance Computer Talk

by lproven＠gmail.com

Amazingly detailed 1hr talk about the Apollo Guidance Computer. It's stunning how much they got into mid-1960s technology: 1 MHz hand-made processor, 1 k of RAM, 4 k of ROM, and bank-switching, with a fault-tolerant multitasking OS with an interpreted metalanguage. Absolutely stunning. https://media.ccc.de/v/34c3-9064-the_ultimate_apollo_guidance_computer_talk -- Liam Proven - Profile: https://about.me/liamproven Email: lproven at cix.co.uk - Google Mail/Hangouts/Plus: lproven at gmail.com Twitter/Facebook/Flickr: lproven - Skype/LinkedIn: liamproven UK: +44 7939-087884 - ?R (+ WhatsApp/Telegram/Signal): +420 702 829 053

7 years, 5 months

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ISO 70's and 80's coax and twinax terminal docs/brochures

by aek＠bitsavers.org

I've started to more aggressively archive material on old IBM and compatible coax and twinax terminals and was wondering if anyone has documentation scanned or squirreled away that I don't already have on bitsavers. Most of these have been scrapped by now, and surviving keyboards for them are going for the high hundreds of dollars now, even from companies like Telex or Memorex. I started surveying what we have in the CHM collection and about half of them have no keyboards :-( This is a drag. Terminals from the PC era forward seem to be in a little better state since many appear to have adopted some flavor of 5 pin DIN interface. There are some new pictures of a few Telex coax terminals up now under http://bitsavers.org/pdf/telex/terminal and I started trying to restore a 276-12 with integrated establishment controller that I'm going to have to find a keyboard for. Maybe Cindy knows of someone who has some more old Telex Microswitch keyboards.

7 years, 5 months

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Looking for two DEC H445 power bricks for PDP 11/40 project

by jnc＠mercury.lcs.mit.edu

> From: Henk Gooijen > As far as I know, the 11/40 uses only one H745. Depends on what kind of memory it has. If MF11-L, it has two H745's; if MM11-U, it has an H745 and an H754. (The harness has two different connectors for the 5th 'brick', so it can handle either kind. At least, that's the situation on the later machines [serial numbers above 6000]; early production /40's only support the MF11-L, and you have to use special add-on harnesses to support an MF11-U in them; see DEC-11-H40SA-B-D, Chapter 6 for the details.) Noel

7 years, 5 months

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The Ultimate Apollo Guidance Computer Talk

by jnc＠mercury.lcs.mit.edu

> From: Cory Heisterkamp > I can also highly recommend the book 'Digital Apollo' Yes, it's quite good. Two other good books about the AGC are: Eldon Hall, "Journey to the Moon" which is by a guy who was one of the managers on the project. The book is anything but a 'management history', though (unlike too many 'technical histories', like the Smith/Redmond Whirlwind history, which I was just looking at). The book is a _technical_ history - the engineering is front and center, and management decisions are on the periphery, for background. There's also: Hugh Blair-Smith, "Left Brains for the Right Stuff" which is by someone who was an engineer on the project - he did work on the CPU architecture, and also some software. The book is a mix of personal experiences, and an overall history of the moon race. Noel

7 years, 5 months

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I finally got to see a LMI Lambda in real life...

by dseagrav＠lunar-tokyo.net

Two of them in fact, and a CADR - In my garage, no less! The Lambdas are in bad shape, and the CADR is in very bad shape and missing its console and disk. It?s going to take awhile to get them cleaned up and see how viable they are. On the plus side, I got a some spares and debugging equipment, and I have a working PDP-11 to debug the CADR with if it gets that far, so there?s a good chance I should be able to get at least one working. I?ll post more as things develop.

7 years, 5 months

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SAGE memory plane

by aek＠bitsavers.org

ebay https://www.ebay.com/itm/232927847019 https://secretsofcoldwarradar.omeka.net/exhibits/show/cold-war-radar-techno… can someone identify exactly what this box was called, when it was deployed, and what training manual they are referring to? we have a couple http://www.computerhistory.org/collections/catalog/102633198 and they keep getting mis-identified.

7 years, 5 months

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favor at vcfmw

by aek＠bitsavers.org

If Paul brings some Dilog qbus boards, could someone look for a DQ614 for me? I've been trying to find out if he has one, and haven't been able to do it.

7 years, 5 months

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Looking for two DEC H445 power bricks for PDP 11/40 project

by jnc＠mercury.lcs.mit.edu

> From: Pierre Gebhardt > two H745 bricks (delivering -15V) which are still missing. I'd be very > happy, if anybody could consider parting with one or two. Location is > in Germany. There should be some on eBait; mildly expensive, but if you get them from the US, the shipping is going to be a fair amount anyway... Noel

7 years, 5 months

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VT100 emulation

by seefriek＠gmail.com

From: Al Kossow <aek at bitsavers.org> > > a 7" android tablet based on the wondermedia wm8650 SOC > ... > these things are so old they've disappeared from the market > Well...not 7", but there is this: https://blackberrymobile.com/product/blackberry-key2/ KJ

7 years, 5 months

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Looking for two DEC H445 power bricks for PDP 11/40 project

by p.gebhardt＠ymail.com

Hello list, last year, I was able to obtain a BA11-F chassis for my PDP 11/40 build-up project. The power supply to run a system in basic configuration is complete except for two H745 bricks (delivering -15V) which are still missing. I'd be very happy, if anybody could consider parting with one or two. Location is in Germany. Please contact me off-list. Thanks a lot in advance for anybody of you helping me to work towards a running my first very classic PDP-11! Best regards,Pierre ------------------------------------------------------------------------------- Pierre's collection of classic computers moved to: http://www.digitalheritage.de

7 years, 5 months

3
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cctalk Digest, Vol 48, Issue 17

by technoid6502＠gmail.com

I recall the SAGE was an integrated system of control for Interceptors. It began in the 1950's and became fully operational with the F106 fighter interceptor aircraft. It could control an entire intercept from wheels up to flare on landing. I never thought I'd SEE a chunk of the system. Thanks! I think it stood for Semi-Automatic Ground Environment, or some such. What kind of cores does it use? I once saw a board of Ruby Rod core memory at a junkyard. Very beautiful. Jeff

7 years, 5 months

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Looking for two DEC H445 power bricks for PDP 11/40 project

by jnc＠mercury.lcs.mit.edu

> From: Pierre Gebhardt > There are indeed some DEC power brick models on epay, but none > regarding the H745. Here is one: https://www.ebay.com/itm/270303423286 but it is _really_ pricey. I have dealt with them before, they put high prices on things; try offering them a reasonable amount and see if they take it. Also, you could try contacting this guy: https://www.ebay.com/usr/patrick-j He has a lot of 'brick's listed, just not an H745, but he has a ton of stuff (I 'picked' his warehouse, it's enormous), and maybe he just forgot to re-list it when it expired, or something? Noel

7 years, 5 months

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SPARC Solaris 1.1.2 running in MAME

by aek＠bitsavers.org

on a simulated SPARCstation 1 https://forums.bannister.org/ubbthreads.php?ubb=showflat&Number=113948#Post…

7 years, 5 months

1
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Further Lisp Machine Developments

by jnc＠mercury.lcs.mit.edu

> From: Daniel Seagraves > I spun up a blog for posting the ongoing status of things; Cool! Thanks! Very interesting... How many cards came with the CADR? My memory is dim, are there just memory and I/O cards, or was the disk controller on a separate card from other I/O? I wonder how many physical CADRs are left in the world? Anyone have a list? Noel

7 years, 5 months

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Free: flash cards / SRAM cards (PC Card, PCMCIA cards)

by sieler＠allegro.com

These have been claimed, and two people are in line behind the first person. thanks. Stan

7 years, 5 months

1
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ISO Tandy 1000 EX 360k floppy drive

by drlegendre＠gmail.com

Folks, Trying my luck again. Looking for an external floppy drive for a Tandy 1000 EX XT clone.. They can be recognised by their white case and 30-pin female card edge connector cable. Please let me know if you have or know of one. Been looking for many years. Thanks, Bill On Sep 14, 2018 11:27 PM, "John Klos via cctalk" <cctalk at classiccmp.org> wrote: Hi, list, I've lurked here a bit but haven't posted much yet. I'm now working on a system that I think people here might know something about. Can anyone here tell me whether the CPU modules from an AlphaServer ES45 will work in an AlphaServer DS25? According to Wikipedia, they're both EV68CB CPUs. Some sites (including HP's QuickSpecs) list the 1.25 GHz ES45 CPU card as containing 16 megs of cache, but some places list the 1.25 GHz card with just 8 megs, like the 1 GHz card. If I could find a 1.25 GHz CPU card with 16 megs of cache, and if it'd work, I think it'd be a worthwhile upgrade to my DS25. Thoughts? Thanks, John

7 years, 5 months

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Free: flash cards / SRAM cards (PC Card, PCMCIA cards)

by sieler＠allegro.com

Free for pickup in Cupertino (or, pay for packing/shipping via PayPal): Some PC Card memory/flash-drive cards... not tested (Oddly, my 2016 Mac Pro Laptop has no PC Card slot! :) (no, really, I don't recall getting a chance to test them when I bought them over the last 10+ years, either, sorry!) 5 items: PMC SRAM Card 2 MB P/N SM002M-NN (needs CR2325 battery, no sign of corrosion) Fujitsu 64KByte SRAM Memory Card (ICMC v4.0) Intel FLASH Series 2 10 MByte Memory Card (1993) Simple Technologies (new in box) FLASH Storage ATA-800MB Type I PCMCIA P/N STI-ATAFL/800 Simple Technologies (new in box) FLASH Storage ATA-800MB Type I PCMCIA P/N STI-ATAFL/800 First one to ask, via offline email to sieler at allegro.com, gets them. As usual, I'll notify the first couple of responders personally. thanks, Stan

7 years, 5 months

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I finally got to see a LMI Lambda in real life...

by jnc＠mercury.lcs.mit.edu

> From: Daniel Seagraves > Two of them in fact, and a CADR - In my garage, no less! Neat! Can you say anything about how they came to you? > and I have a working PDP-11 to debug the CADR with Was that part of the package, or did you already have it? Noel

7 years, 5 months

1
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Cossor DIDS 400 needs saving ( Paris )

by jos.dreesen＠greenmail.ch

This link from fr.comp.ordinosaures is interesting http://f6aoj.ao-journal.com/crbst_752.html Would be a shame if this really ancient videoterminal goes to waste. As an aside : what a beautiful name the french have for there old computers : "ordinosaures" Jos

7 years, 5 months

5
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Free: IDE Flashdrive 3.5"

by sieler＠allegro.com

Hi, Still cleaning my storage/office ... I have a new-looking 3.5" solid state drive for free, pickup in Cupertino (or pay for packing/shipping via PayPal). SanDisk 3.5" Flashdrive 20 MB (IDE) model: SB35B-20 (possibly unused; in anti-static bag, seal unbroken) thanks, Stan

7 years, 5 months

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Free: IBM Travelstar 8E External Hard Drive

by sieler＠allegro.com

Free (pickup in Cupertino, or pay for packing/shipping via PayPal). IBM Travelstar 8E External Hard Drive. New in box. Includes the PCMCIA card and cable. Model: DTZN-0810SP Capacity: 8,100 MByte Note: as sold new by IBM, including the instruction sheet which says: power is provided by the PC Card, no A/C adapter is needed, and that you should ignore the green power switch on the box. First offline *email* to sieler at allegro.com gets it. thanks, Stan

7 years, 5 months

1
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AlphaServer CPU compatibility question

by john＠ziaspace.com

Hi, list, I've lurked here a bit but haven't posted much yet. I'm now working on a system that I think people here might know something about. Can anyone here tell me whether the CPU modules from an AlphaServer ES45 will work in an AlphaServer DS25? According to Wikipedia, they're both EV68CB CPUs. Some sites (including HP's QuickSpecs) list the 1.25 GHz ES45 CPU card as containing 16 megs of cache, but some places list the 1.25 GHz card with just 8 megs, like the 1 GHz card. If I could find a 1.25 GHz CPU card with 16 megs of cache, and if it'd work, I think it'd be a worthwhile upgrade to my DS25. Thoughts? Thanks, John

7 years, 5 months

1
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wanted: Cromemco Cyclops drop me note offlist thanks Ed# www.smecc.org

by couryhouse＠aol.com

wanted: Cromemco Cyclops drop me? ?note offlist? thanks? Ed#? www.smecc.org

7 years, 5 months

1
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HP 9845A Computer

by peterbrown10＠hotmail.com

I'd be interested too if the machine is in Europe ... Peter ________________________________ From: cctalk <cctalk-bounces at classiccmp.org> on behalf of cctalk-request at classiccmp.org <cctalk-request at classiccmp.org> Sent: 14 September 2018 17:00 To: cctalk at classiccmp.org Subject: cctalk Digest, Vol 48, Issue 14 Send cctalk mailing list submissions to cctalk at classiccmp.org To subscribe or unsubscribe via the World Wide Web, visit https://eur02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.classi… or, via email, send a message with subject or body 'help' to cctalk-request at classiccmp.org You can reach the person managing the list at cctalk-owner at classiccmp.org When replying, please edit your Subject line so it is more specific than "Re: Contents of cctalk digest..."

7 years, 5 months

2
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HP 9845A Computer

by marlenekleinoh＠gmail.com

Hi! We have an HP 9845A computer (1977) in working condition. Can we post it on your site? Thank you, Marlene

7 years, 5 months

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HP 9845A Computer

by Richard.Sheppard＠telus.com

My comment was going to be "you just did :>)" Richard Sheppard

7 years, 5 months

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Unknown US manufacturer - try again

by peter＠vanpeborgh.eu

Guys, See these photos: https://scontent.flhr2-2.fna.fbcdn.net/v/t1.0-9/35682272_10216634445119982_2 53889771863015424_n.jpg?_nc_cat=0&oh=74459af2e9232dd433046b2a9d43dedd&oe=5BC F55A0 and https://scontent.flhr2-2.fna.fbcdn.net/v/t1.0-9/36244235_10216691120256825_4 287682979926376448_n.jpg?_nc_cat=0&oh=e8ab72feb9eb1cf311c7ef0546318e44&oe=5C 1358C6 The photos are of a board I recently obtained for my collection. I've not, to date, been able to discover who the manufacturers were. It almost certainly US, The chips are week 27 of 1970, NAND gates. Can anyone help? Many thanks, peter || | | | | | | | | Peter Van Peborgh 62 St Mary's Rise Writhlington Radstock Somerset BA3 3PD UK 01761 439 234 || | | | | | | | |

7 years, 5 months

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Unknown US manufacturer - victory!

by peter＠vanpeborgh.eu

Many thanks to all for the detective work. The page 3-34 mentioned is in a Lawrence Livermore course manual on Fundamentals of Digital Sytems Training. I love you all and will try to test you again soon. peter || | | | | | | | | Peter Van Peborgh 62 St Mary's Rise Writhlington Radstock Somerset BA3 3PD UK 01761 439 234 || | | | | | | | |

7 years, 5 months

1
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HP 2000 / 2100 emulator

by pete＠petelancashire.com

Here's what I'd like to do. I have both a teletype 33 and 35. What would be fun is the foot in the pedestal a emulator that lets me pretend I am logging into a 2000 or 2100 and I can do basic and save files. One of those files being what I think was called to Star Wars or something like that. Basically replay my youth on a 35 which I had access to before 33.

7 years, 5 months

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Kennedy 9610 Available at VCFMW.

by useddec＠gmail.com

Please contact me off list. Thanks, Paul

7 years, 5 months

1
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Apollo, TEK

by useddec＠gmail.com

Apollo motherboard dated 1988 013034 Apollo 008231 memory board Apollo 0121173-001 with daughter board high res color display board Tektronix 46UTXGC1006 3 button mouse, Logictech # is 119-18098-00 Can ship or drop off at VCRMW. I'm starting to get organized!!! Thanks, Paul

7 years, 5 months

1
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Portable terminals

by r_a_feldman＠hotmail.com

>Message: 18 >Date: Sun, 9 Sep 2018 14:23:13 +0200 >From: Carlo Pisani <carlojpisani at gmail.com> >To: technoid6502 at gmail.com, cctalk at classiccmp.org >Subject: Re: Portable terminals > >we (at http://www.downthebunker.xyz<http://www.downthebunker.xyz/>) are developing a project that is >a portable vt100 in laptop shape. > >done with modern components, essentially it's an FPGA + LVDS circuit >to drive the LCD >the chassis will be manufactured by laser-cutting plastic planes, then >assembled with glue. > >it's not yet a public project since it's a personal team internal >work, but maybe ... > >anyway, the firmware is barebone, with a simple OS that runs directly the VT100 >Il giorno dom 9 set 2018 alle ore 08:25 Jeffrey S. Worley via cctalk ?<cctalk at classiccmp.org> ha scritto: >> >> Data General made a nifty and flexible terminal called "Walkabout". It >> had 32kb of internal memory one could use to take notes on the move. It >> ran on a 12volt wall wart which charged an onboard nicad battery. <snip> If you want a small, portable, battery-powered terminal, get an HPLX palmtop (95, 100 or 200). Runs for weeks or months on two AA batteries. The HPLX palmtops have a VT100 emulation. I have not had a need to use it, but Tony has and perhaps can comment on its fidelity to the real thing. Bob

7 years, 5 months

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AlphaWindows - Protocol Information?

by Martin.Hepperle＠MH-AeroTools.de

Brian, thank you very much for the scans. The scan is very nice and the document looks very interesting. I would like to make some experiments to learn how the system works, but first I have to obtain the missing keyboard for my HP 700 terminal. Just replaced the line filter capacitors to avoid the WIMA-RIFA-sound-n-smell (TM). I have also read out the EPROMs with the operating system and sent them to bitsavers if they want to archive them. Martin (Germany) > -----Original Message----- > ... > 3. Re: AlphaWindows - Protocol Information? (Brian L. Stuart) > ... > ------------------------------ > > Message: 3 > Date: Mon, 10 Sep 2018 18:06:59 +0000 (UTC) > From: "Brian L. Stuart" <blstuart at bellsouth.net> > To: <cctalk at classiccmp.org>, Al Kossow <aek at bitsavers.org> > Subject: Re: AlphaWindows - Protocol Information? > Message-ID: <651900294.1493946.1536602819815 at mail.yahoo.com> > Content-Type: text/plain; charset=UTF-8 > > On Wed, 9/5/18, Al Kossow via cctalk <cctalk at classiccmp.org> wrote: > > Martin and I thank you! > > Al and Martin, > I've run the standard though our fancy copier > at the office and had it scan at 400dpi, bilevel > directly to PDF. A quick look with xpdf seems > to be a pretty decent scan. I've put it up here: > > http://cs.drexel.edu/~bls96/alphawindows.pdf > > I also had a sales slick from ADDS for their > 4000/AWT terminal that supported AlphaWindows. > I went ahead and scanned that one in color: > > http://cs.drexel.edu/~bls96/adds_4000awt.pdf > > Hope that helps, > BLS > > > ------------------------------

7 years, 5 months

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VT100 emulation

by lproven＠gmail.com

On Mon, 10 Sep 2018 at 19:35, Ali <cctalk at ibm51xx.net> wrote: > > > > Anything that runs a more up to date version of Android? > > > > Sure. The Gemini. > > > > https://www.planetcom.co.uk/ > > > > I have one. It's a lovely little device and quite well-made. I am not > > sure how robust it will be long-term. > > That is a nice device. I wonder if it is available in the US. Do you know if they keep the OS up to date? Yes, it's available worldwide. I backed the kickstarter in January and got mine in July. I think they have now caught up with the backlog and are available at retail. I still have not received my peripherals yet, though -- nobody has. But the company is doing OK and discussing a 2nd model. They plan to update Android but so far there's only been one update. It's currently on Android 7.1. I'm hoping for 8 with Project Treble. The retro angle is that it's a licensed successor model to the late-1990s Psion Series 5 and 5MX. It has the same keyboard, licensed >from Psion. The modern machine is thinner and does not have a removable battery (sadly). It also runs Debian Linux and Jolla Sailfish. -- Liam Proven - Profile: https://about.me/liamproven Email: lproven at cix.co.uk - Google Mail/Hangouts/Plus: lproven at gmail.com Twitter/Facebook/Flickr: lproven - Skype/LinkedIn: liamproven UK: +44 7939-087884 - ?R (+ WhatsApp/Telegram/Signal): +420 702 829 053

7 years, 5 months

2
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Beehive terminals

by jhj＠trnsz.com

The Beehive ATL-008 might be an obscure terminal today, but it holds a special place in my heart as the first hardware terminal I used extensively, and was advanced (for 1982), supporting user programming in C. It's an advanced ANSI/VT102 terminal. It was based on the 68008 and had quite the nice interface, and extensions like soft keys. There is a TerminalWiki entry at https://terminals-wiki.org/wiki/index.php/Beehive_ATL-008 and Bitsavers has the manuals at http://www.bitsavers.org/pdf/beehive/. A somewhat defining feature of this terminal was that the cursor control keys was on left hand side of the keyboard, which many found better optimized for data entry tasks. The Beehive 3270 terminal was also quite advanced. I was wondering if anyone might have one of these terminals - or at least the ROM from one, so it might be possible to pursue emulation? Is there anyone who is into rescuing and preserving the firmware from the terminals of the past? -- Jeffrey H. Johnson jhj at trnsz.com https://ban.ai/multics

7 years, 5 months

2
2
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WTB: 64K cache SIMM (72-pin)

by spectre＠floodgap.com

Trying to restore an Alpha Micro ColdFire-based system, and it's missing its cache SIMM. It works without it, but it sure would be nice. AM doesn't have much info on it but it appears to be a 72-pin 64KB SIMM (unknown speed), same keying as 72-pin RAM SIMMs. I doubt this is a custom part and ISTR that PCs of around that time used something similar. If you've got something like this mouldering in your parts drawer, please advise. Thanks! -- ------------------------------------ personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com -- Heisenberg may have been here. ---------------------------------------------

7 years, 5 months

5
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AlphaWindows - Protocol Information?

by blstuart＠bellsouth.net

On Wed, 9/5/18, Al Kossow via cctalk <cctalk at classiccmp.org> wrote: > Martin and I thank you! Al and Martin, I've run the standard though our fancy copier at the office and had it scan at 400dpi, bilevel directly to PDF. A quick look with xpdf seems to be a pretty decent scan. I've put it up here: http://cs.drexel.edu/~bls96/alphawindows.pdf I also had a sales slick from ADDS for their 4000/AWT terminal that supported AlphaWindows. I went ahead and scanned that one in color: http://cs.drexel.edu/~bls96/adds_4000awt.pdf Hope that helps, BLS

7 years, 5 months

1
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RK07's , controller, packs at VCFMW

by useddec＠gmail.com

If anyone is interested, I have 2 RK07 drives, controller and packs I can bring to VCFMW. Would prefer to sell as a package, but will consider breaking up. Any reasonable offer. Thanks, Paul

7 years, 5 months

1
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SETASI UNI-BUS Cache?

by useddec＠gmail.com

Is anyone familiar with this? It looks like a M9202, but has logic on both boards. Maybe memory management? Thanks, Paul

7 years, 5 months

1
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OT(?): A word processor for handwriting

by rtomek＠ceti.pl

Perhaps something of interest for people here: http://www.styluslabs.com/ (source: https://news.ycombinator.com/item?id=17858641 ) I was a bit mixed about this until I read that single written page had 1.4 mbytes - after that I finally understood this "writing tool" is worse than Word ever was (or is it?). So it is going to catch up with people (or some derivation of idea). So now I am destined to... defending MS Word? -- Regards, Tomasz Rola -- ** A C programmer asked whether computer had Buddha's nature. ** ** As the answer, master did "rm -rif" on the programmer's home ** ** directory. And then the C programmer became enlightened... ** ** ** ** Tomasz Rola mailto:tomasz_rola at bigfoot.com **

7 years, 5 months

1
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Portable terminals

by technoid6502＠gmail.com

Data General made a nifty and flexible terminal called "Walkabout". It had 32kb of internal memory one could use to take notes on the move. It ran on a 12volt wall wart which charged an onboard nicad battery. The lcd screen is not backlit but it was useable in most any light. The sliders on the face note-book-like machine controlled contrast and darkness. I used one as the head unit for my Data General MV4000/DC. The battery is likely dead on any you'll find, but it is easily accessible by a sliding cover on the side which when removed reveals a pack you can unplug and replace without tools. It supported a fair list of emulations selectable on-screen including vt220 and vt100 plus various proprietary 'Dasher' emulations. The keyboard is better than most modern-day notebooks, it is VERY light- weight and pretty sturdy. Here's a link to a photo. http://www.digibarn.com/collections/systems/dg-walkabout/DSC06218.JPG Jeffrey S. Worley

7 years, 5 months

7
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VCFMW - Zilog PDS8000 Model 20, NCR 1102-6000

by marvin＠west.net

I have a Zilog PDS8000 Model 20 with some disks and manuals. It has not been powered up since I first got it some 20 or so years ago (total guess.) It was previously owned by a software developer. The boot disks are still in the 8" drives :). The NCR 1102-6000 is another one that I picked up years ago (who knows how many) and it has not been powered up in the time I've had it. Includes keyboard and original disks/manuals. Has two cartridges... one looks like a parallel printer and the other I didn't pull out (memory?). These are things I won't bring unless they are sold before I bring them. The operating condition is totally unknown. So if there is any interest, please let me know with offer. My plan is to leave for Chicago on Tuesday.

7 years, 5 months

1
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VT100 emulation

by ullbeking＠andrewnesbit.org

Hello all, The current discussion about why VT100?s are so popular got me to rethinking a related topic. I?ve been thinking about this in the back of my mind for quite some time. First, what is the most faithful emulation software that runs on *nix systems? Or is it the case that if you are running, say, GNU/Linux in console mode, or xterm on X11, that you can get a fine emulator simply by having an accurate terminfo entry? Second, does there exist anything like a ?VT100 operating system?, that emulates the VT100 directly on the bare metal of the machine? In this case you?d use the external serial port to connect to the target machine. One example use case I have in mind here is connecting a serial cable to a server?s BMC serial port for maintenance purposes, if it supports the VT100 protocol, in crash cart scenarios. Is it possible to do something like this by using the server?s PS/2 keyboard port and VGA monitor port? So, essentially a KVM without the ?M?? Is there some obvious constraint that I?ve missed? Kind regards, Andrew Sent from my mobile phone

7 years, 5 months

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Teletype mod 40 PSU

by cclist＠sydex.com

On 09/08/2018 08:10 PM, Ed Sharpe wrote: > Yepper?? the? material that holds all together... > ? > I? remember? back in the? first? year in? Computer? Biz? we? came across > one of these and it was? fun? to watch it? run self? test.... fast!?? > sold it to someone that had one and interfaced it already... > ? > Always? wanted? later? a combo? for museum? display of the? CRT and the? > Printer... There is a great? glossy that? shows up on ebay? time to time > that was a press photo of a gal? with the combo at a desk... It's a bit surprising to see how few pieces of old peripherals have survived. Sometime around 1985, we had a VAX 11/750 driving two CDC (MPI) big 1500 (IIRC) LPM printers. I don't know whatever became of them, but we couldn't have been an isolated instance. It seems that more CPUs have survived than the accompanying peripherals. This, in spite of installations with oceans of disk and tape drives, for example. --Chuck

7 years, 5 months

1
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Teletype mod 40 PSU

by useddec＠gmail.com

I have a teletype 40PSU101 I can drop off at VCFMW or mail, but is is a bit heavy. If you have any interest, please contact me off list. Thanks, Paul

7 years, 5 months

4
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PDP11/15

by useddec＠gmail.com

If anyone has serious interest in one, please contact mo off list.. I can bring it to VCFMW. Thanks, Paul

7 years, 5 months

1
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HP 260

by sieler＠allegro.com

Hi, I have an HP 260 that I'd like to find a new home for. I'm currently thinking of taking it to the ham radio / antique-computer swapmeet (ASVARO, held at Fry's Sunnyvale, CA, tomorrow morning). Thought I'd mention it here in case someone was interested in it. For those unfamiliar with it, it's small enough to fit in a Contico. https://www.facebook.com/hp260hp250preservationProject has a photo (in a cabinet with a disk drive) on the far left. www.hp260.net has some info about them. Stan (Cupertino, CA, USA)

7 years, 5 months

2
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VT100s

by mark＠matlockfamily.com

One terminal system I haven?t seen mentioned is the VT LAN40. I bought one new in the box about a year ago from Keyways ($400) and have found it to be very useful although it is not contemporary with most of the DEC systems we discuss. It needs a flat screen monitor, but can have multiple windows that allow cut and paste between between serial ports and it can talk LAT, CTERM, Telnet on its ethernet port. It has a mouse and does a great VT340 emulation. The unit can Mounted vertically and take very little bench space, but as has been mentioned before the keyboard is a typical VT420 sized keyboard. It has a history buffer so has many of the advantages of a good software emulator but is very accurate in the emulation. It gives me a single screen and keyboard that I can use to simultaneously work with my RSX11M+ (via LAT), the RT-11 MINC via serial and the two VAXes and any RPi?s running linux. The CPU is a little slow but response is acceptable. The ROMs in it might have bit a good starting point for reverse engineering. I think Keyways has a number of them and believe he will sell to hobbyists at the lower price above. I found this description at https://vt100.net/dec/vt_history VT LAN40 In February 1995, Digital announced the VT LAN40, a colour windowing network terminal. This device was a diskless PC, containing Windows 3.1 in ROM, and supporting up to eight terminal sessions over LAT, DECnet, TCP/IP or serial line, using TD/SMP. The system box and mouse had a suggested list price of $890. It connected to standard PC keyboards and monitors. Mark

7 years, 5 months

1
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Oddball Terminals (Was: Re: VT100's)

by jnc＠mercury.lcs.mit.edu

> From: Al Kossow > I just put up some pictures of the vt02, 05 Those useable for the CHWiki (with credit, of course)? Oddly enough, I just did the article on the VT05 about a week ago! Noel

7 years, 5 months

1
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LSSM - Large IBM haul

by jnc＠mercury.lcs.mit.edu

> From: Anders Nelson > Their latest comments on Facebook mention they're about halfway there. Yeah, but I was wanting to know how things had gone since that posting (although I haven't looked to see if there's any update). As of last night, they'd made significant progress past what was in the posting, but still had a ways to go. I've just sent in a chunk, so I think I have the standing to appeal for others to help, too! :-) It's a really worthwhile cause - there aren't that many System/370's left in the world! (I know, I know, not as cool at the /360, but still important.) Here's the URL again: https://www.facebook.com/503408869821526/posts/1084448565050884/ with the details of the appeal. (You don't need to be a FaceAche member to read it; I'm not, and it came up OK for me.) Noel

7 years, 5 months

1
0
0 0

VT100's

by jnc＠mercury.lcs.mit.edu

> From: Paul Koning > inside are a whole pile of boards, all single-sided etch with many > hundreds of jumpers to compensate for not being two-sided. Not cheap, > presumably If memory serves, didn't the VT52 also have single-sided boards with a whole bunch of jumper wires? Something relatively common, anyway, if not the VT52 - I clearly remember the masses of jumpers on something, and Tech Sq had scads of VT52's (to the point where VT100's were not that common when they did show up, we were already full up). Presumably, with automated placing machines, the jumpers were cheaper than a large double-sided board (the VT52's boards were huge)? I'm assuming _someone_ did the math (including the amortization of the placing machine, which would take longer to complete such a board). > From: Al Kossow > The biggest hardware innovation was smooth vertical scrolling > ... > I've never liked the feature IIRC, we generally turned it off because it couldn't keep up at 9600 baud. Noel

7 years, 5 months

2
1
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VCFMW DEC VTs, LAs

by useddec＠gmail.com

Is anyone interested in any DEC VT50, VT52(ONE WITH PRINTER), VT78, any of the VT100 family, or any other video terminals or monitors or parts? LA35, LA36, LA120, any other printer or parts? Anything else? If asked, I will try to bring. Thanks, Paul

7 years, 5 months

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VT100's

by tshoppa＠wmata.com

Zane, are you talking about the VT100 specifically, or the whole VT1xx line? My gut feeling is that the VT100 was at most 20% of the production in the whole VT1xx line. The internal expandability of the VT100 was a cool idea, but overall sales of VT101, VT102, VT131, and VT132 have to dwarf the original VT100. Then there's the VT103 and VT180 which are more than just terminals but still in the family. I should go through my old pictures from the 1990's. At one point I had an entire garage filled with hundreds of VT1xx's. Tim N3QE

7 years, 5 months

1
0
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VCFMW - looking for a BC80D-5K (DECMATE) disk cable/OS8 disks (RX02)

by billdegnan＠gmail.com

I have asked Paul Anderson to see if he has a BC80D-5K cable for a DECMATE VT278 (same as VT78) to RX02 pedestal twin drive. I am also looking for the OS/8 disks. I am pretty sure my VT278 works, I have some spare parts too, just need the cable and the disks hopefully to have a working OS/8 system. SO - If Paul has no cable/disks and if anyone going to VCF MW looking to make a deal for these items, please contact me through my site, https://www.vintagecomputer.net/contact.cfm Thanks Billl

7 years, 5 months

1
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Weird and ancient IBM offline memory devices

by peter＠vanpeborgh.eu

Vintage techie guys and girls, Second attempt - hope springs eternal. Do any of you know where I could get hold of IBM 3850 Mass storage and IBM 2321 Data cell media? 1960s-1970s. See: https://en.wikipedia.org/wiki/IBM_3850 https://en.wikipedia.org/wiki/IBM_2321_Data_Cell If you do, I would like to get hold of one of each. Many thanks, Peter

7 years, 5 months

1
0
0 0

Newcastle Connection Sources?

by holger.veit＠iais.fraunhofer.de

Hi, for some research on ancient Unix, I am interesting in finding the source code (tape, etc.) of the so-called "Newcastle connection", aka "UNIXes of the World Unite!" . See, for instance, https://pdfs.semanticscholar.org/13f8/6c18fa780031d76b80f359d6670f9f3debdc.… or ftp://ftp.informatik.uni-stuttgart.de/pub/cm/pcs/NewcastleConnectionR1.0_1983.pdf for details. There are a few more papers which I know as well. Does someone have the source tape or pointers to it? THX in advance -- Holger

7 years, 5 months

1
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2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

test-drb