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

by jnc＠mercury.lcs.mit.edu

> From: Allison > FYI this is the same problem designers hit with DRAMS back 40 years ago. This didn't ring (pun not intended) a bell for me; can you say a bit more? > From: Chuck Guzis > I'll offer a suggestion that if your SD card *must* be a significant > distance from its host Like I said, this is a pre-prototype; on the production units, there will be _no_ cable. The SD socket will be about 1-2" from the FPGA. > From: Dwight Kelvey > this behavior on my PDP-8/e where a 7474 flip flop chip was bad. The > input looked great and the output was "half baked" There's no chip at all on the driving end of the line (just that 470K resistor); we see this with the SD card _unplugged_. And we see the exact same thing on several lines. I'm still not clear, from the discussion, how exactly that nice 'square-wave' interference is happening - could it be capacitative crosstalk? (I'd have thought capacitative cross-talk would be inverted - driving a positive voltage on one 'side' of the 'capacitor' would, I would think, induce an oppposing voltage on the other. But I'm clearly no EE! :-) Noel

9 years, 2 months

8
9
0 0

Anyone want a Sun T-shirt?

by cclist＠sydex.com

It's what, 27 years old... Trying to de-junk my clothes closet, I ran across an XL t-shirt bearing, on the front, a image of a ladybug with a red circle and bar across is and the legend "Getting out the last bugs". On the back, it has the Sun logo and "SunStruck 4.1.89 (Wanda)". It's in decent condition and probably dates from the time my wife worked at Sun, even though she had nothing to do with the project in question. Anyone want it? Pay for first-class mail (I'll stuff it into an envelope) and it's yours. Otherwise, it goes to Goodwill. --Chuck

9 years, 2 months

2
1
0 0

Cross-talk square-wave?

by jnc＠mercury.lcs.mit.edu

Hi, a question about generic analog stuff. In the process of getting SD cards to work, Dave is seeing square-wave noise on a line. (1V of square wave, with pulses about 400ns long, running at 375kHz.) The line runs through a flat cable of modest length, along with other signal-carrying lines. (No, we were not smart, and didn't put ground lines between each pair of signal lines!) Could cross-talk cause this kind of noise? We would have thought that you'd only get spikes, associated with the rising and trailing edges of a signal in a parallel wire, not a whole square-wave. During the constant-current period in the middle of the pulse, there shouldn't be any cross-talk? Is there some mechanism I/we don't understand that could do that? (My guess is there's a leakage path in the circuitry on one end or the other, not cross-talk in the cable, but...) Thanks! Noel

9 years, 2 months

9
16
0 0

Wyse keyboards and their variants

by sales＠elecplus.com

Wyse, Link, etc. Does anyone still use these on actual terminals? I have some guys coming to scrounge on Saturday, and they want them for is to desolder the switches. If you need some for actual use, please let me know the exact model you want so it does not get parted out. Cindy Croxton Electronics Plus

9 years, 2 months

1
0
0 0

Floating point routines for the 6809

by spc＠conman.org

Some time ago I came across the MC6839 ROM which contains floating point routines for the 6809. The documentation that came with it stated: Written for Motorola by Joel Boney, 1980 Released into the public domain by Motorola in 1988 Docs and apps for Tandy Color Computer by Rich Kottke, 1989 What I haven't been able to find is the actual *source code* to the module. Is it available anywhere? I've been playing around the the MC6839 on an emulator but having the source would clear up some issues I've been having with the code. -spc

9 years, 2 months

13
18
0 0

QIX game on PDP-11

by henk.gooijen＠hotmail.com

Hi PDP-11 game players ? I found that the famous QIX game was ported to the PDP-11 !! See http://imgur.com/a/gtPfh Back in the days, I spend quite a few Guilders on this addictive game. Does anybody have a lead to the software? That would be awesome! Thanks, Henk

9 years, 2 months

8
8
0 0

Cross-talk square-wave?

by jnc＠mercury.lcs.mit.edu

> From: Eugene (W2HX) > I am still not convinced it is coupling at all. ... I just don't think > you can get square waves from square waves. ... > it is even harder to believe one could successfully couple a square > wave onto such a transmission line unless the signal is actually being > asserted on the line at a low impedance ... > Looking at this picture ... this shows exactly what I would expect to > see with cross talk the little glitches on the CS line that correspond > to edges on the clock signal. Exactly. That sort of cross-talk we understand (and have seen before). But a square wave? How can that be? That was the motivation for my original post. It's not super-critical to understand, because like I said, this is on a pre-prototype, and the actual unit will be arranged nothing like this (no cable, etc, etc), so we're just going to fix this with whatever kludge makes it go away, so we can focus on the things we really do need to work on. But we'd still like to understand what is happening here, and how. Could cross-talk (of whatever form, inductive or capacitive) do this, or does this more or less have to be signal leakage (on the board at one end, or the other) somehow? Noel

9 years, 2 months

1
0
0 0

Model 28 Teletypes in Edmonton, Alberta

by rlloken＠telus.net

On Wed, 29 Mar 2017, W2HX wrote: > I might have missed it, but did you offer this on the greenkeys list (or > would you like me to forward it?) they are tty enthusiasts. Eugene No, I have never been a member of the green keys list and there is no point in joining now. Punt the message to the green keys list if you can. I still have (because they are small and portable) a set of model 28 service manuals, a keyboard assembly, a print mechanism (a carriage assembly?), a box of unperforated five level tape rolls, and a few unused but quite elderly ribbons if anybody has a use for them. -- Richard Loken VE6BSV : "...underneath those tuques we wear, Athabasca, Alberta Canada : our heads are naked!" ** rlloken at telus.net ** : - Arthur Black

9 years, 2 months

1
0
0 0

Model 28 Teletypes in Edmonton, Alberta

by rlloken＠telus.net

So, my ex-wife sent my Model 28 RO and Model 28 ASR (along with a Conn vacuum tube electronic organ) to the landfill yesterday. I am told by my son that they went to the Eco Station Reuse Area at either the Ambleside or kennedale Eco Station. So, in the unlikely event that somebody wanting a 28 tty and within travelling distance of Edmonton, Alberta reads this, those items are reported to be there for taking. Oh, and bring a truck and a very strong friend. -- Richard Loken VE6BSV : "...underneath those tuques we wear, Athabasca, Alberta Canada : our heads are naked!" ** rlloken at telus.net ** : - Arthur Black

9 years, 2 months

2
1
0 0

Apple 1, Commodore 65, Enigma Machine, Inventor of C++

by cctalk＠snarc.net

"What do an Apple 1, Commodore 65, Enigma Machine, and the inventor of C++ all have in common?" "They all be at VCF East this weekend." You should go, too. ________________________________ Evan Koblentz, director Vintage Computer Federation a 501(c)3 educational non-profit evan at vcfed.org (646) 546-9999 www.vcfed.org facebook.com/vcfederation twitter.com/vcfederation

9 years, 2 months

3
2
0 0

Cross-talk square-wave?

by jnc＠mercury.lcs.mit.edu

> From: Dwight Kelvey > Is there any load resistance at the end of the line? Yes, 270K to ground (i.e. pretty large). How does that have an effect on whether cross-talk can create a square wave? Sorry, I'm not understanding. Noel

9 years, 2 months

4
5
0 0

Cross-talk square-wave?

by jnc＠mercury.lcs.mit.edu

I should mention that this is a pre-prototype; the final thing won't have a cable at all; so this isn't a fundamental issue with the design (if it is cross-talk). And the SD card isn't even plugged in when we see this - if it is cross-talk, it has to be some other signal carried in the cable. We're just trying to figure out how cross-talk can possibly produce an induced square-wave. Noel

9 years, 2 months

1
0
0 0

PSU protection with resettable polyfuse

by binarydinosaurs＠gmail.com

Hi folks, The PSU for my Executel 8085 system is an Astec AC8151-01 40W 5A unit that puts out +5/+12/-12V. A while back somone suggested using an ATX PSU in its place which TBH I'd forgotten about untl I saw a breakout board that you plug a 20 or 24 pin ATX supply into and it terminates each rail in whatever you choose to solder in. ukp8, rude not to :) My only worry is an ATX PSU is capable of putting out a lot more than 5A if it goes wrong so I'd like to protect each rail with an appropriate fuse. Any downsides to resettable polyfuses? Cheers, -- adrian/witchy Owner of Binary Dinosaurs, the UK's biggest home computer collection? www.binarydinosaurs.co.uk

9 years, 2 months

3
3
0 0

pile of gear for sale (DEC, Sun, PC, ephemera, v.35 cables, etc etc)

by akb+lists.cctalk＠mirror.to

I have about four or five hundred things I'm ready to stop owning. I'm in Boston. If anyone wants a number of objects, I could deliver to VCF East this weekend. Inventory list at: http://threefingered.com/2017_inventory_3.html I have someone interested in getting all of the TK-50s, OSF/1 and Digital Unix CDs, and some of the VME boards, so those things might not be available. Contact me at decruft @ mirror.to please. Items I'd especially like to find good homes for are the DECNIS cables and the Adak ISDN box, anyone interested in those items is welcome to them for cost of postage and a good story about why you want it.

9 years, 2 months

4
4
0 0

Acclaim Entertainment Indy (with data, emails, etc) on eBay

by mj＠mjturner.net

Hi, I came across this on eBay today: www.ebay.com/itm/162446083760 To quote from the listing: Own a piece of gaming history! This Indy workstation was once owned by Acclaim Entertainment, the legendary game publisher, and was liquidated at Acclaim's bankruptcy sale in 2004. It sat untouched in a Brooklyn warehouse for more than a decade before being recovered last year. This Indy, "pup," was used for internal Acclaim business operations at its headquarters in Glen Cove, NY. It features user account information and internal company files for a number of Acclaim employees: Andy Skalka: More than a hundred e-mail messages about Acclaim IT operations (see photos) Danielle Papsidero: More than five hundred e-mail messages (see photos) Rob Zimmelman: Image sequence for Dragonheart game combat EVa motion capture editing software (unlicensed) BioMotion motion capture editing software (unlicensed) Motion captured animation data (Dreamworks, baseball, Batman, etc.) Licenses: various expired and/or inactive licenses for Nichimen N-World and BioMotionEditor No affiliation with the seller, but it sounds like an interesting piece of history. Price is $199 BIN. Cheers, MJ -- Michael-John Turner * mj at mjturner.net * http://mjturner.net/

9 years, 2 months

10
12
0 0

PDP-11/20 in Iowa (x3)

by jnc＠mercury.lcs.mit.edu

> From: Philipp Hachtmann > The 11/20 is the simplest 11 as far as I know. 'Simplest' in what sense? They certainly aren't the easiest ones to understand, with all that random control logic! The -11/04 is far easier to understand (for me, at least; YMMV). > From: Ethan Dicks > Was there ever a quad MOS memory board for the 11/20? I'm pretty sure there was never a UNIBUS quad memory card from DEC. > if anyone knows where to get a crate of 110V Boxer fans for around > $5/each, let me know New ones (not exactly the same as the originals, but the right size in the X/Y directions, if not identical in the Z, and 110V, with the same kind of power connector) are available on eBait for around $10 each. Look for "120mm 110V fan". Noel

9 years, 2 months

1
0
0 0

Introducing the UUCP/Usenet Project

by wkt＠tuhs.org

Hi all, as part of the upcoming 50th anniversary of Unix in mid-2019, a bunch of people are working to rebuild the mid-1980s uucp/Usenet network using (real/simulated) period-accurate systems. To make things easier, we are simulating the dialup lines too. Details of the (nearly) turnkey software to do this is at: https://github.com/DoctorWkt/4bsd-uucp A map of what nodes we have so far is at: https://raw.githubusercontent.com/DoctorWkt/4bsd-uucp/4.3BSD/uucp.png If you are interested in participating, email me back. Cheers, Warren

9 years, 2 months

12
11
0 0

Not Getting Emails

by robert.jarratt＠ntlworld.com

I have not had any emails from cctalk for 2 or 3 weeks. I went to my subscription details and saw that emails were disabled for me. I re-enabled them a few days ago but I still have not received any new emails. I can see that there is traffic by looking at the archives, and if I am not getting emails I hope to at least see this one appear in the archive and hopefully read replies there too. Is it just me? Regards Rob

9 years, 2 months

3
3
0 0

PDP-11/20 in Iowa (x3)

by pbirkel＠gmail.com

http://www.vcfed.org/forum/showthread.php?56897-Came-across-three-PDP-11-20- units-today Need some lovin'. Not near enough to here . -----

9 years, 2 months

16
22
0 0

Microdata and Decision Data haul from usual site

by jwsmail＠jwsss.com

I was able to get hold of a lot of boards which had been pulled from two Decision Data's and a Western Dynex 2400 RPM 10mb (probably) drive. The Dynex drive is similar to the RL02 and in fact was configurable to look like one in one of the options. Microdata would have used 24 sector packs vs. the 12 sector packs used by DEC, however. One of the CPUs is a pretty ordinary Data / Control set made by Microdata but with most of the etch and silkscreen modified to have Decision data info. I'm going to check with my Microdata people and see if anyone recalls if this was done by Microdata, or by DD themselves. There is a nice find however, a 2901 CPU 16 bit system cpu set and memory. It also runs in the 130 pin Microdata 1600 backplane, which makes it interesting. I'd love to get information and drawings as much as might be around for this set. May be donating most of it to add to my 1600 system @ the CHM, as there are boards here which I didn't have examples of to donate at the time. Will check with them after I fondle the boards for a while. It's cool to have an additional example of a possible Microdata 1600 type CPU, as this is one of my collecting areas. I'll be adding in titles and comments on the photos later, but here are photos of the boards for now. http://jim-st.blogspot.com/2017/03/microdata-decision-data-and-western.html Thanks Jim

9 years, 2 months

1
0
0 0

Fwd: 50% DISCOUNT WEBSITE MANUAL & PARTS, ONE WEEK ONLY

by aek＠bitsavers.org

FYI -------- Forwarded Message -------- Subject: 50% DISCOUNT WEBSITE MANUAL & PARTS, ONE WEEK ONLY Date: Mon, 27 Mar 2017 06:53:02 -0700 From: Tucker Electronics Company <jtucker at tucker.com> To: aek at bitsavers.org 50% DISCOUNT WEBSITE MANUALS & PARTS, ONE WEEK ONLY Thanks for your purchases of manuals and parts last week and previously. We have slashed the selling price of most manuals on eBay by 50-75% in recent months. Our two websites www.etestmanuals.com <http://na02.mypinpointe.com/link.php?M=48182615&N=48220&L=22673&F=H> and www.etestparts.com <http://na02.mypinpointe.com/link.php?M=48182615&N=48220&L=22672&F=H> have many more listings than our eBay site ( teoutlet). Unfortunately, we have not been able to update pricing and shipping costs on these sites. These manuals and parts were purchased when we had a large repair and calibration lab. Many are one of a kind and subject to prior sale. We have over 43000 different listings on www.etestmanuals.com <http://na02.mypinpointe.com/link.php?M=48182615&N=48220&L=22673&F=H>. We have over 12,000 different listings on www.etestparts.com <http://na02.mypinpointe.com/link.php?M=48182615&N=48220&L=22672&F=H>. THE 50% DISCOUNT APPLIES TO ALL ITEMS LISTED ON THESE TWO SITES THAT ARE AVAILABLE STILL. The promotion will run from March 27th to April 1st. All items are subject to prior sale. We want to encourage you to buy especially the next two months. If you are most comfortable buying on eBay ( our site is teoutlet), please continue to do so. On US sales, we can make consolidated shipping quotes as needed. We are very motivated to sell although there are limits to what we can do on eBay. On our two websites listed above, we encourage you to make a list and contact us at jtucker at tucker.com <mailto:jtucker at tucker.com> regarding consolidated prices and shipping costs. Our websites can be used to look equipment up, but not to take advantage of the 50% discount prices this week. We can send you PayPal invoices for any purchases not done on eBay. In all cases you have the buyer protection of PayPal. We can also take Credit Cards. Our phone number is 2143488800. We do prefer email to jtucker at tucker.com <mailto:jtucker at tucker.com> as most questions about manuals require research and can?t be handled by a phone call. Please keep in mind that quantities are limited on the majority of listings and everything is subject to prior sale. SOME EQUIPMENT PROMOTIONS FOR THIS WEEK ONLY: 3 each Agilent-HP 6031A Power Supplies, 0-20V, 0-120A, 1000 watts with manual These have been TESTED and are on eBay at $750 regular price. $550 each this week only by direct purchase. 3 each Tektronix P5205 High Voltage Differential Probes with All Accessories. Regularly listed on eBay at $550. Price for this week only of $350 each by direct purchase. Electro Scientific Industries DT72A Standard Decade Transformer. Regular price of $750. Priced to sell this week for $550. Thanks again for your business and we look forward to hearing from you soon. Jim Tucker Tucker Electronics Company 11448 Pagemill Road Dallas, TX 75243 jtucker at tucker.com <mailto:jtucker at tucker.com> 2143488800 ------------------------------------------------------------------------------------------------------------------------ Sent by Tucker Electronics Company | 11448 Pagemill Road, Dallas, TX 75243 Sent to: "aek at bitsavers.org" | You are subscribed to "Websites sale list" Change your preferences / opt out <http://na02.mypinpointe.com/unsubscribe.php?M=48182615&C=e6e8ac0e5788770207…> www.pinpointe.com <http://na02.mypinpointe.com/link.php?M=48182615&N=48220&L=39695&F=H>

9 years, 2 months

1
0
0 0

STC 2920 tapedrive schematics

by kspt.tor＠gmail.com

On 24 March 2017 at 18:40, Camiel Vanderhoeven via cctech <cctech at classiccmp.org> wrote: > Does anyone have schematics for an STC (StorageTek) 2920 reel-to-reel > tapedrive?[..] That drive was discussed on the list some time ago. All the docs should be available on bitsavers by now, although I don't remember if it's under 'stc' or 'storagetek' or both.

9 years, 2 months

1
0
0 0

[VideoMagia] Reparando um Vectrex

by kspt.tor＠gmail.com

On 24 March 2017 at 16:34, Alexandre Souza via cctalk <cctalk at classiccmp.org> wrote: > Well...there is some description in english, google translate is a very > useful tool and the post has a pertinent video. I cannot view it as spam. > Anyway...sorry for bothering :) > > Enviado do meu Tele-Movel > > On Mar 24, 2017 12:25 PM, "Paul Koning" <paulkoning at comcast.net> wrote: > >> It sure has the signature of spam. A link to some random place, without >> explanation of what it is, text in Portuguese when the list uses English... Your spam-o-meter isn't accurate.. mine didn't trigger. It isn't spam, so it's clearly functional. Subject is 'Reparando um Vectrex', which hardly needs any additional translation. Body said 'New post on blog'. Blog looks good. Poster is Alexandre, old-timer on the list. All items ticked OK, all good.

9 years, 2 months

2
2
0 0

MC68K's on DEUNA's

by jnc＠mercury.lcs.mit.edu

> From: Bill Gunshannon > I doubt Motorolla was in the business of custom making different size > chips, even for DEC. So, that triggered a question in my mind: why was DEC using the 68K on this board, anyway? They had plenty of in-house chips the could have used, e.g. the J11. The MC68000 had only a 16-bit bus, so it's not that dissimilar in capabilities. Why buy out? Did Motorola offer them a price they couldn't resist, or what? Noel

9 years, 2 months

2
1
0 0

Wanted: AT&T 3B2 Ethernet Card ROM images

by lists＠loomcom.com

I'm trying to track down ROM images from AT&T 3B2 expansion cards. I've started with the EPORTS serial card, which I have. What I'd love to find is the ROM from the NI Ethernet card. Not all ROMs were socketed. Freqently they were soldered, so I know that getting these probably won't be easy. If I had an NI card of my own I'd desolder the ROMs, but alas, I do not. If you have these ROMs, are willing to image them, or -- and this is a real long shot -- if you're willing to let me borrow a card for a while, I'd greatly appreciate hearing from you. Best Wishes, -Seth -- Seth Morabito web at loomcom.com

9 years, 2 months

2
1
0 0

booting os/8

by w2hx＠w2hx.com

Hi folks, I have a PDP-8/e that I've been working on. I have completed construction of AK6DN's RX01/02 emulator. I got to the step tonight where I was trying to boot an OS/8 disk image and nothing was happening. I realized that I do not have the bootstrap diode board in my 8/e so begin the bootstrap triggered by the "SW" switch. Does anyone have the program I can toggle in for the bootloader? What I found is somewhat confusing. Here is a discussion on this topic. https://groups.google.com/forum/#!searchin/alt.sys.pdp8/RX01$20boot|sort:re… It seems one fellow was attempting to edit/improve the bootloader of another fellow. I was wondering if anyone has distilled this into something simple. At the moment, I care only about booting from RX01-Disk0. Any pointers greatly appreciated. Thanks Eugene W2HX

9 years, 2 months

9
11
0 0

For Sale: STM Pied Piper "Portable Computer"

by sellam.ismail＠gmail.com

I have for sale this fine STM Pied Piper, Z80 CP/M machine from Canada circa 1983. Please see details here: http://www.vcfed.org/forum/showthread.php?56872-STM-Pied-Piper-Portable-Com… Thanks! Sellam

9 years, 2 months

5
7
0 0

Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

by barythrin＠gmail.com

For the record, I and I'm sure lots of others look forward to this blog of experience. -------- Original message --------From: Terry Stewart via cctalk <cctalk at classiccmp.org> One other question regarding using this MS-DOS 486 to run an 8 inch floppu

9 years, 2 months

3
2
0 0

MC68K's on DEUNA's

by jnc＠mercury.lcs.mit.edu

So all the DEUNA's I've seen have L10 (ceramic package, 10Mhz) 68K's in them. Has anyone tried using anything else, and did it work? I _assume_ an x12 would work, but until someone has acutally tried it... The Pxx's (plastic packaging) might not work - according to the datasheet, they are 2mm wider than the ceramics (why, I have no idea - it probably means they aren't interchangeable, which makes no sense at all to me). Noel

9 years, 2 months

5
7
0 0

GImix Ghost Video Board

by vintagecomputer＠bettercomputing.net

No.. mine has a 2513 character generator.. the one in the ad uses ram based character generation. ?Based on IC dates my board looks like mid to late 70s.. a fair bit earlier than that one. Sent from my Samsung device -------- Original message -------- From: dave.g4ugm at gmail.com Date: 2017-03-24 2:16 AM (GMT-08:00) To: 'Brad H' <vintagecomputer at bettercomputing.net>, "'General Discussion: On-Topic and Off-Topic Posts'" <cctalk at classiccmp.org> Subject: RE: GImix Ghost Video Board Is it one that's in the catalogue here:- http://bitsavers.trailing-edge.com/pdf/gimix/Gimix_Catalog_Jun82.pdf Dave > -----Original Message----- > From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Brad H via > cctalk > Sent: 23 March 2017 23:58 > To: 'General Discussion: On-Topic and Off-Topic Posts' > <cctalk at classiccmp.org> > Subject: GImix Ghost Video Board > > Hoping someone might be able to help me on this. > > > > I got a Gimix Ghost SS50 video board today and was trying to find a manual. > I'm sure these were used in Gimix's own ghost systems but the very limited > info I've come across out there suggests they may have worked with any > SS50 system.? It basically provides a direct composite video feed out from the > computer, I assume bypassing the need for a terminal.? I plugged it in and > fired it up on my SWTPC 6800 and it is working - I think - it generates a full > screen of readable random characters.? However it does not put up anything > from the computer - that still goes out via terminal.? I'm assuming Ghost > systems were wired up somehow to use this.. I'm hoping to find a manual > that explains how.? I don't see a keyboard interface for it anywhere so maybe > this went along as a complete Ghost system with hardware I don't have. > > > > Thanks if you have anything! > >

9 years, 2 months

2
1
0 0

MC68K's on DEUNA's

by jnc＠mercury.lcs.mit.edu

> From: Bill Gunshannon > Considering that I have never seen any sockets that were 2mm different > in width ... I really can't imagine any CPU not fitting. I think you're right. I took another look at the drawing, and I'd been looking at the package width dimension: there's also a separate pin-pin distance (horizontal), and that _is_ the same for plastic and ceramic. Ooops! Sorry. Noel

9 years, 2 months

1
0
0 0

MC68K's on DEUNA's

by jnc＠mercury.lcs.mit.edu

> From: John Wilson > I think this is DELUA? Yes, that's right - sorry! > I'm getting old ... could have it wrong. No, _I_'m the one who's getting old! (But in this case, that's not it - I always get the names of those two mixed up!) > I'd be inclined to just try it. I hadn't bought anything yet... :-) In particular, there's a source of really cheap P12's, but if the 2mm width difference means the Pxx's won't fit, no use paying good money for them, right? > the definitely-fried CPU (right?) that's in there now? The definitely-missing CPU that's not in there now, actually! ;-) Noel

9 years, 2 months

3
2
0 0

STC 2920 tapedrive schematics

by camiel.vanderhoeven＠vmssoftware.com

Does anyone have schematics for an STC (StorageTek) 2920 reel-to-reel tapedrive? I?m trying to solve a tape-loading issue that seems to be power-supply related, and some schematics would be very handy right now? Camiel.

9 years, 2 months

1
0
0 0

Looking to rehome an Atari ST Colour monitor

by bulk＠blit.ca

Hi folks, I have an Atari colour monitor for the ST series of computers that I'm looking to rehome. Model number is SC 1224, Version 2. I've never attempted to power it up and have no idea if it works. It's free to a good home, provided I don't have to put in a lot of effort. (I'm currently in the middle of packing for a move; I have very little spare time or energy.) I'm in the Toronto area. If anyone wants it, let me know. --Chris -- Chris Reuter http://www.blit.ca "Oh God Lem, you're using science for no good. We took an *oath* we would try to do that less." --Better Off Ted

9 years, 2 months

1
0
0 0

More interesting (?) stuff from my attic

by bill.gunshannon＠hotmail.com

I have a couple more items for the auction block. Real, original, in good shape: DECWRITER III - LA120 OPERATOR REFERENCE CARD DIGITAL Alpha Architecture Handbook - Special Announbcement Edition - February 1992 - PRELIMINARY INMOS Limited occam 2 Reference Manual (ISBN: 0-13-629312-3 Prentice Hall) Any of them should fit in a USPS Flat Rate Envelope so figure less than $10 postage. bill

9 years, 2 months

3
5
0 0

GImix Ghost Video Board

by vintagecomputer＠bettercomputing.net

Hoping someone might be able to help me on this. I got a Gimix Ghost SS50 video board today and was trying to find a manual. I'm sure these were used in Gimix's own ghost systems but the very limited info I've come across out there suggests they may have worked with any SS50 system. It basically provides a direct composite video feed out from the computer, I assume bypassing the need for a terminal. I plugged it in and fired it up on my SWTPC 6800 and it is working - I think - it generates a full screen of readable random characters. However it does not put up anything from the computer - that still goes out via terminal. I'm assuming Ghost systems were wired up somehow to use this.. I'm hoping to find a manual that explains how. I don't see a keyboard interface for it anywhere so maybe this went along as a complete Ghost system with hardware I don't have. Thanks if you have anything!

9 years, 2 months

2
1
0 0

Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

by cctalk＠ibm51xx.net

Chuck, Are these dumb adapters that just convert 34 to 50 or do they so more then that? Thanks. -Ali -------- Original message -------- From: Chuck Guzis via cctalk <cctalk at classiccmp.org> Date: 3/23/17 1:59 PM (GMT-08:00) To: cctalk at classiccmp.org Subject: Re: Extracting files off ?unknown? 8 inch disks. Any thoughts? On 03/23/2017 01:32 PM, Mike Stein via cctalk wrote: > I was just going to suggest the same thing, but I see you (Tez) are > going the FDADAP route; more convenient for sure. > > But the majority of the 34- and 50-pin signals actually line up 1 to >? 1 when aligned pin 34 to pin 50; as a matter of fact I have a system > that uses the same 34-pin cable to connect to both, with just a > jumper or two to select 5 or 8" (the index signal is one IIRC). I've still got a couple of the Microsolutions "adapter cards" with 50- and 34-pin headers.?? They work in reverse as well. --Chuck

9 years, 2 months

3
2
0 0

eBay: PDP-11/70 backplane?

by jnc＠mercury.lcs.mit.edu

> From: Pontus Pihlgren > The 11/70 backplane is wirewrapped. Oh, right you are! I don't know where my brain has fled to these days! It's actually an MJ11 (-11/70 core memory) backplane (I checked the part number - plus someone pointed out that you can see "MJ11" written somewhere). Noel

9 years, 2 months

3
2
0 0

Extracting files off “unknown” 8 inch disks. Any thoughts…

by terry＠webweavers.co.nz

Hi, I?ve posted this to the VCF too?apologies for cross-posting. I?d be grateful for any guidance or comments anyone could give me on this problem. Guys in the building next door to me (a Science lab) have found some 8 inch floppy disks. They want to see what?s on them, or at least to archive them. They have no idea what machine these disks were used with, or the software was used to write the files. They may be CP/M, or some other format entirely. I?ve got little experience with 8 inch drives or disk formats. However I have got a bare 8 inch floppy drive (a Mitsubishi M2896-63 Half Height 8inch DSDD), and also a CP/M computer with 8 inch drives (A Panasonic JD-850M). I?m thinking it might be an interesting challenge/project to see if I can read these disks and get files off. However, I imagine given all the unknowns it won?t be easy?perhaps even impossible I see two possible approaches. One is to wire up the 8 inch drive to an MS-DOS machine. I?ll have to build/get a PSU for the drive so it can supply the necessary 24 Volts required. I?ll also have to make up a special drive cable. That info is available. In fact, Chuck gave me some tips a year or so ago. However, once I?ve got the drive successfully wired up, I then need to somehow analysis the disks to see what format they are in. Does anyone know of any software that will do this? I?m aware of disk22, for reading KNOWN CP/M formats but is there anything out there that will analyse a disk from scratch? Search the web has thrown up a few possibilies (MMCPC, Cpmtools) but I haven?t explored them at all. The second approach is to use the Panasonic JD-850M, and find a CP/M program that will analyse an ?unknown? 8 inch disk and read files from said disks into the CP/M environment. I?d somehow get the program into one of my Panasonic 8 inch disks (just how, I?ll need to figure out). I?d also need to figure out how to get the files out of that environment also. Anyway, has anyone else faced this kind of challenge and what are your thoughts? I don?t want to start unless I at least have some chance of success. I?m not hopeful. The more I read the more you seem to need real forensic skills and something like Kyroflux that works at low-level. Thanks Terry (Tez)

9 years, 2 months

7
17
0 0

Seeking schematics/maintenance prints for DMB32/T1012 and H3033 distribution panel

by ethan.dicks＠gmail.com

Hi, All, With all the recent chatter on the VAX8200 on the simh list, I was motivated to dust mine off and do a little digging. I finally took the plunge and got a DMB32 (right now, all I have are the 4 built-in console ports) but while it was easy enough to find the 8.5"x11"-format user guide and technical manual which describe registers and installation and problem diagnosis, I also want the internal cable pinouts and schematics. I know it's harder to find post-Unibus-era C-sized prints since DEC stopped shipping printsets with every order, so I have to ask, does anyone have any schematics for either the T1012 module, the H3033 I/O bulkhead board, or both? I can likely quickly recreate the schematic for the H3033, it's 10 D-shell connectors (8x DB, 1x DC, 1xDD) and 6 30-pin ribbon cable connectors. Lots of signals, but lots of repetition. The D-shell pinouts are in the documenation I already have. The 30-pin connectors/BI fingers are not. But if the schematics are already available, I don't have to buzz one out. http://manx-docs.org/collections/antonio/dec/dmb32ug1.pdf http://manx-docs.org/collections/antonio/dec/dmb32td1.pdf ftp://bitsavers.informatik.uni-stuttgart.de/pdf/dec/vax/vaxbi/EY-5554E-SG-0002_VAXBI_Adapters_Student_Guide_Feb87.pdf Thanks for any new docs. -ethan

9 years, 2 months

1
0
0 0

eBay: PDP-11/70 backplane?

by jnc＠mercury.lcs.mit.edu

This: http://www.ebay.com/itm/252820125010 looks like it might be an -11/70 backplane, but I'm too lazy to look up the part number. Noel

9 years, 2 months

6
5
0 0

Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

by terry＠webweavers.co.nz

>For what it's worth, unless you're intent on *writing* 8" single-density >floppies on the PC, the interconnect between the 8" drive 50-conductor >cable and the PC 34-conductor one is pretty straightforward. You don't >need a FDADAP board for that, although it's very convenient. Yes, and I'm all for convenience given that reading these things will be a challenge enough. I've ordered an FDADAP board and also an FDDC power converter. http://www.dbit.com/fddc.html http://www.dbit.com/fdadap.html Now I just has to wait a week or two for them to arrive! Terry (Tez)

9 years, 2 months

1
0
0 0

Any faithful VT100 Emulators?

by barythrin＠gmail.com

This had kept the prices on that model a bit higher. The serial port while smaller is easy to hack a cable for most connections you need. I guess it's not that way for the other models? I hear it very often for the lx-200 pretty exclusively. -------- Original message --------From: Robert Feldman via cctalk <cctalk at classiccmp.org> Date: 3/23/17 11:20 AM (GMT-06:00) To: cctalk at classiccmp.org Subject: Re: Any faithful VT100 Emulators? Warren Toomey wrote: > are there any _good_ VT100 terminal emulators Another alternative is to get a used HP LX 200 palmtop computer. Its DataComm program has a good VT100 mode. Bob

9 years, 2 months

1
0
0 0

Z-8000 something on eBay

by seefriek＠gmail.com

I don't have any idea what this is but it appears to have Z-8000 CPU+MMU chips. Perhaps an Onyx or S8000 CPU card? I know some folks here are in to that sort of thing. http://www.ebay.com/itm/NOS-Vintage-DSC-MP-4-EPC-Rev-D-K-Expansion-Board-Ca… KJ

9 years, 2 months

4
3
0 0

Any faithful VT100 Emulators?

by r_a_feldman＠hotmail.com

Warren Toomey wrote: > are there any _good_ VT100 terminal emulators Another alternative is to get a used HP LX 200 palmtop computer. Its DataComm program has a good VT100 mode. Bob

9 years, 2 months

1
0
0 0

what a beautiful and amazing place

by steve＠stephenmerrony.co.uk

Dear friend! We've visited a really cozy and beautiful place, I'm sure you'll love it too, check it out http://display.504-n-park.com/bdbc Thx, steve

9 years, 2 months

3
2
0 0

Sun E10000 Historical Enquiry

by seefriek＠gmail.com

> Heck, I'd be fascinated to talk to anyone who purchased > the machines during their lifespan (1997-2001) and could tell me what you > used them for. Not the e10k, but Cingular Wireless used clustered e15k's as Oracle database engines. Dozens of them. Very impressive performance. KJ

9 years, 2 months

1
0
0 0

Any faithful VT100 Emulators?

by kspt.tor＠gmail.com

On 22 March 2017 at 02:02, Warren Toomey via cctalk <cctalk at classiccmp.org> wrote: > Which raises the question, are there any _good_ VT100 terminal > emulators, especially for Linux? For any other platforms? xterm never gives me any problems. But the default terminal emulators of Gnome or KDE have some issues in my experience. xterm is always buried in the system somewhere though, and it works. I use it e.g. for accessing my old minicomputer which has a VT100 setting.

9 years, 2 months

5
5
0 0

Any faithful VT100 Emulators?

by jwest＠classiccmp.org

Ethan wrote... ----- I'm following this thread because I too want a decent terminal emulator that works with a variety of vintage text editors (that seems to be the torture test) but for Linux or OS X. Putty seems to be a repeat suggestion but it's not for my platforms. ------ The most faithful vt100 emulation I've seen myself (not that I've done a big study or anything) is SecureCRT from Van Dyke. It is a commercial product, but about the only commercial product I've decided is worth the cost. I use it daily and pay for upgrades and new releases gladly. I do know that they came out with a version for OSX a while back. I expect that to be robust. There is a version for Linux, never tried that as I'm a FreeBSD zealot. There is also an iphone/ipad app by secureCRT and I've used it in a few pinches but never on a classic system. And the company has actually heard of VMS ;) Their support is off-the-charts. On more than one occasion I've emailed them asking for this or that... and several times I've seen it implemented on the next release. They actively listen and implement. If the linux and OSX and app versions are as good as the windows one... it's worth a shot. J

9 years, 2 months

1
0
0 0

Any faithful VT100 Emulators?

by wkt＠tuhs.org

OK, so I don't have a real VT100, so I'm accessing an old 4.3BSD system with xterm and LXTerminal terminal emulators on Linux. Last night, for a laugh, I ran vttest from the 1980s and the terminal emulators performed woefully. Which raises the question, are there any _good_ VT100 terminal emulators, especially for Linux? For any other platforms? Cheers, Warren

9 years, 2 months

7
6
0 0

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