Re: Testing a 74S240

2022-04-30 Thread Guy Dunphy via cctalk
At 11:25 PM 30/04/2022 +0100, you wrote: >In trying to fix my M7133 CPU from my 11/24 I thought I had identified a >failed 74S240. However, when I replaced it (while adding a socket), the >fault remained. So, I guess the original chip may not be faulty. I decided >to test the original chip on a

RE: VAX 780 on eBay

2022-01-01 Thread Guy Dunphy via cctalk
At 07:50 PM 1/01/2022 +, you wrote: >> >True. But if you're trying to get > $5000 for something, it doesn't seem >unreasonable to suggest that investing a bit in getting an extension cord run >to the location of the machine would be a good idea. The absence of that >effort makes me wonder

Re: NI PCI-GPIB+ Analyzer boards on ebay

2021-12-09 Thread Guy Dunphy via cctalk
About the software: I bought a couple of that seller's cards; one each of 284088568161 & 284088570014. Asked him about the software. Here's his reply. Regarding your question about the Analyzer software, if I recall correctly it comes bundled in the "NI-488.2" software package. I

Re: HP 5061-3476: Which boards go where

2021-09-11 Thread Guy Dunphy via cctalk
At 11:41 PM 10/09/2021 -0400, you wrote: >Hi Guy! > >Thanks for the post and interesting. No it's not quite the exact power >supply but close. However > >Are you *sure* those cards are in the right slots? Hmm... I was starting on that system back in Nov 2013. I'm pretty careful about taking

Re: HP 5061-3476: Which boards go where

2021-09-10 Thread Guy Dunphy via cctalk
Here are some disassembly pics of a HP 5061-6615 power supply. http://everist.org/pics/hp1000_ps/5061-6615.zip 2.9M Details: HP 1000 Model 2113E SN 2340A03701 OPT 004 014 power supply Model 5061-6615SN 2340 Not the exact same PS as yours, but it might help? My problem is

Re: Extremely CISC instructions

2021-08-23 Thread Guy Dunphy via cctalk
>Hello, > >For the sake of illustration to folks who are not necessarily used to >thinking about what computers do at the machine code level, I'm interested >in collecting examples of single instructions for any CPU architecture that >are unusually prolific in one way or another. This request is

Re: DEC computer lab / mini banana plugs

2021-06-17 Thread Guy Dunphy via cctalk
At 07:47 PM 17/06/2021 -0500, Jon Elson via cctalk wrote: >A while ago there was discussion about the mini banana plugs >used in this system. > >On another project at work, we needed some mini banana >plugs, these sure look similar. > >I found that Digi-Key stocks some, as part # 314-1403

Re: SOT: Scanning old computer docs

2021-04-03 Thread Guy Dunphy via cctalk
At 12:19 AM 3/04/2021 -0600, you wrote: >On 4/2/21 10:27 PM, Guy Dunphy via cctalk wrote: >> There are defects in your 'good' flatbed image too - for eg the >> bleed-through of the orange lettering on the other side of the >> sheet. The way to correct that is to use

Re: SOT: Scanning old computer docs

2021-04-02 Thread Guy Dunphy via cctalk
Hi Kevin, Are you _sure_ the two modes use the same optical sensor? Often sheet feed systems use a different sensor somewhere along the paper path. I suspect they are not, given the odd colour pattering off the top edge of the paper, on the autofeed image. If those two images are definitely

Re: Hard To Believe This Person Is Serious

2021-03-25 Thread Guy Dunphy via cctalk
At 05:45 PM 25/03/2021 -, you wrote: >https://www.ebay.co.uk/itm/313467585213 Seller is German. Of course they are serious. The real question is whether they are sane. Guy

Re: removing melting rubber from metal?

2020-11-01 Thread Guy Dunphy via cctalk
At 12:14 PM 27/10/2020 -0500, you wrote: >Hi All, > >I have an EP-1 eprom programmer from BP Microsystems. > >The rubber feet melted. It was in my closet. I have no clue how it got >that hot, or if they >are just some composition for them to melt. > >My question is how do I clean this up?

RE: Well Heeled "Rescue"

2020-10-19 Thread Guy Dunphy via cctalk
>https://www.ebay.com/itm/APPLE-1-Original-1976-Computer-System-1st-Steve-Wozniak-designed-computer-and/174195921349 Heh, all very jolly. Thanks everyone for reminding me... of my personal Apple I story. http://everist.org/NobLog/20181001_missing_wave.htm Guy At 08:39 PM 19/10/2020 -0700,

Re: What's the secret to LK201 leaf springs?

2020-09-13 Thread Guy Dunphy via cctalk
At 10:41 AM 12/09/2020 -0700, you wrote: >I got an LK201 recently that was a little damaged in transit. A couple of the >keycap assemblies and their corresponding leaf springs have come off. I can >see how the leaf springs fit on the little posts on the keycap assemblies, and >I can see where

Re: paper tape archiving

2020-07-30 Thread Guy Dunphy via cctalk
Be glad you don't have to deal with this kind of thing: http://everist.org/pics/misc/20200719_6831_wet_tapes.jpg A bunch of PDP 8 system tapes. That were literally soaking in liquid water when recovered. Yes, that is mildew. They are nearly dried out now. Still to be determined if they can be

Re: Interesting device on eBay -- CDC clock generator?

2020-01-19 Thread Guy Dunphy via cctalk
At 02:22 AM 17/01/2020 -0800, you wrote: > >On 2020-Jan-17, at 12:11 AM, William Maddox on CCTalk via cctalk wrote: > >> The seller thinks this may be a drum memory, but it is clearly not. My >> guess is that it is some kind of clock generator. Anyone recognize this? >> >>

Re: FS : IBM Magnetic cards for IBM selectric "compocarte" (?)

2020-01-03 Thread Guy Dunphy via cctalk
Bah, attached photos don't work. OK, the pic is here: http://everist.org/pics/misc/20200103_5346_IBM_mag_cards.jpg Guy At 10:51 PM 3/01/2020 +1100, you wrote: >Huh, that's a coincidence. Going through a recent bequeathment to the >Australian Computer Museum Society, >I'd just yesterday opened

Re: FS : IBM Magnetic cards for IBM selectric "compocarte" (?)

2020-01-03 Thread Guy Dunphy via cctalk
Huh, that's a coincidence. Going through a recent bequeathment to the Australian Computer Museum Society, I'd just yesterday opened a box with manuals, some cards, and other bits for the same system. See pic, with manual cover illustration of the system. It was IBM trying to produce a word

Re: Scanning docs for bitsavers

2019-12-03 Thread Guy Dunphy via cctalk
At 01:20 AM 3/12/2019 -0200, you wrote: >I cannot understand your problems with PDF files. >I've created lots and lots of PDFs, with treated and untreated scanned >material. All of them are very readable and in use for years. Of course, >garbage in, garbage out. I take the utmost care in my scans

Re: Scanning docs for bitsavers

2019-12-02 Thread Guy Dunphy via cctalk
At 01:57 PM 2/12/2019 -0700, you wrote: >On Tue, Nov 26, 2019 at 8:51 PM Jay Jaeger via cctalk >wrote: > >> When I corresponded with Al Kossow about format several years ago, he >> indicated that CCITT Group 4 lossless compression was their standard. >> > >There are newer bilevel encodings that

Re: Disposing: IBM Microchannel cards, for free

2019-11-25 Thread Guy Dunphy via cctalk
They have all gone to good homes. Thanks to Matt and Dave in England for taking an IRMALink each, and Alan in USA for taking the MC/8e Intelligent Async serial set. Not cheap postage, but they saved me from having to bin those nice old cards. Guy At 04:06 PM 23/11/2019 +1100, you wrote: >I'm

Disposing: IBM Microchannel cards, for free

2019-11-22 Thread Guy Dunphy via cctalk
I'm clearing out some old stuff. These are free (but you pay postage) if anyone wants them. Catch: they are in Sydney Australia. --- Digital Communications Associates Inc. Circa 1985 IRMAlink IRMA 2 3270 Micro-to-Mainframe communications IRMA 2 supplies the personal

Re: ge first transistors

2019-11-14 Thread Guy Dunphy via cctalk
At 10:09 AM 14/11/2019 +, ED SHARPE wrote: > >g11 for analog and g11a for digital and pulse >we have a G11A  new in box unused  with cellophane surround available  respond >off list Pretty cool. Some pics down a way in this page:

Re: swtpc.com expired???

2019-11-06 Thread Guy Dunphy via cctalk
For others like me, who are newcomers to this group: http://web.archive.org/web/20190616094729/http://www.swtpc.com/mholley/index.html I hope he's just having a nice fishing holiday or ocean cruise or something. That's the trouble with circles of 'net friends.' Without fallback physical

Re: Free font software

2019-11-04 Thread Guy Dunphy via cctalk
At 04:30 PM 3/11/2019 -0600, Bob Yates wrote: >Sorry don't know how to respond directly There's always the last resort of ctl-C copy and a text editor? >https://fontforge.github.io/en-US/ Have you (or anyone here) actually tried Fontforge? I had a go back in mid 2018, and then it seemed to be

Re: Cheap minicomputer (Tracor-Northern 1610) on Facebook Markeplace (Allentown, PA) 18 bit?

2019-11-02 Thread Guy Dunphy via cctalk
Well, it's sold. I hope someone here hought it, and will post some better pics and details. If it had been near to me I'd have bought it instantly. A rack, a Tektronix XY display, a rack drawer, blanking panels, some neat mysterious instruments, two 8" floppy drives, and a probable

Re: ECL static RAM ( 10144L)

2019-10-02 Thread Guy Dunphy via cctalk
At 08:53 PM 2/10/2019 -0500, you wrote: >I have 400 pieces of Signetics 10144L ECL static RAM chips. >Anybody need some? >These were salvaged from boards by a surplus dealer >(Alltronics, I think). >They are a 256 X 1 bit RAM, somewhere around 20 ns access >time, ceramic package. > >Jon I

Re: HP vintage boards being sold as scrap - WON

2019-09-30 Thread Guy Dunphy via cctalk
Yesterday: >These will go up on my site at http://everist.org/pics/pcbs Then promptly the web hosting server goes down, since this morning of 20190930 Tue in Australia. I don't yet know why, or have any estimate of when it will come back up. Guy

Re: HP vintage boards being sold as scrap - WON

2019-09-29 Thread Guy Dunphy via cctalk
Developments! I asked: >Alternatively, is there anyone on the US East coast who wants to play hold and >reship? Dan Veeneman in Maryland has volunteered. Thank you Dan! His web site: http://decodesystems.com is pretty cool, check it out. Assuming I can get the seller to ship the boards to

HP vintage boards being sold as scrap - WON

2019-09-29 Thread Guy Dunphy via cctalk
At 10:03 PM 27/09/2019 -0500, JRJ wrote: >Thanks for the tip. (Part of not recognizing that is that I had never >made the connection between the 2108B/2112B and the "1000" series >before, until I read about it in this thread, and did some poking >around. The HP's have not been one of my

Re: HP vintage boards being sold as scrap

2019-09-27 Thread Guy Dunphy via cctalk
At 05:42 PM 27/09/2019 -0700, you wrote: >On Sep 26, 2019, at 7:24 AM, Patrick Finnegan via cctalk > wrote: >> >> 3. Just because you have different opinions doesn't mean their ways are >> wrong. Hell, they even seem to be willing to work with people interested in >> single boards. I'm sure

RE: HP vintage boards being sold as scrap

2019-09-27 Thread Guy Dunphy via cctalk
At 06:08 PM 26/09/2019 -0700, you wrote: >> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Guy >> Dunphy via cctalk >> Incidentally I've identified those boards. The ones with the pull rings: >> >> https://i.ebayimg.com/00/s/MTIwMFgxNjAw/z

RE: HP vintage boards being sold as scrap

2019-09-25 Thread Guy Dunphy via cctalk
k up the boards. Not to mention sidestepping the seller's problematical packing intentions. Guy >-Original Message- >From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Guy Dunphy >via cctalk >Sent: Wednesday, September 25, 2019 4:01 PM >To: Brent Hilpert; General Disc

Re: HP vintage boards being sold as scrap

2019-09-25 Thread Guy Dunphy via cctalk
At 02:59 PM 25/09/2019 -0500, John wrote: >What, isn't anyone going to speculate on the value of the gold here? :-) The seller would seem to have been pulling rare boards from many old machines, probably scrapping the systems (since they would have been more saleable with the boards installed)

Re: HP vintage boards being sold as scrap

2019-09-25 Thread Guy Dunphy via cctalk
At 12:00 PM 25/09/2019 -0700, you wrote: >On 2019-Sep-25, at 3:07 AM, Guy Dunphy via cctalk wrote: > >> Does anyone else recognise some of the other boards? > > >There is a stack of IO interface boards, including HSTs, for the HP 2100/1000 >series there. > >Lower-rig

RE: HP vintage boards being sold as scrap

2019-09-25 Thread Guy Dunphy via cctalk
At 02:29 AM 25/09/2019 -0400, you wrote: >I contacted the seller and was able to work out a very reasonable deal to >purchase a selected subset for my future needs. Oh, is that why the price dropped $50? Because some of the boards sold? So really the seller still has the same inflated idea of

Re: HP vintage boards being sold as scrap

2019-09-24 Thread Guy Dunphy via cctalk
At 05:38 PM 24/09/2019 -0500, Cindy wrote: >https://www.ebay.com/itm/174036836066 Sigh. A whole lot of HP 3497A data acquisition plugins (in the back there, with the pull rings): https://i.ebayimg.com/00/s/MTIwMFgxNjAw/z/ZrUAAOSwI5Fdg5KH/$_57.jpg Not sure which cards. Maybe optically isolated

Re: Vintage Computer Warehouse Liquidation

2019-09-22 Thread Guy Dunphy via cctalk
At 04:59 PM 22/09/2019 -0500, Thomas Raguso wrote: >Update: I have also found IBM 500-series punch card equipment. If you find any full boxes of blank IBM punch cards, please mention. I might be able to afford postage on a few. > 1970s HP computers I'm probably going to cry when I see photos.

Re: Ferroresonant transformer supply repair

2019-09-10 Thread Guy Dunphy via cctalk
It's good that these caps are so readily available. But on the other hand, I don't have any sort of power supply at all, for either of my two PDP 8/S machines. Sob. Being in a 240VAC mains country doesn't help, since I understand the original DEC supplies were 110VAC input only. But I'm not

Re: Ferroresonant transformer supply repair

2019-09-08 Thread Guy Dunphy via cctalk
At 04:54 PM 8/09/2019 -0700, you wrote: >Hi Kyle, > >On Sun, 8 Sep 2019 18:42:06 -0500 >Kyle Owen via cctalk wrote: > >> Has anyone replaced the capacitor in a ferroresonant power supply with much >> success? My current understanding is that the capacitor and transformer are >> mated as a pair,

Re: TRS-80 Fireworks

2019-08-28 Thread Guy Dunphy via cctalk
At 01:15 AM 28/08/2019 -0700, you wrote: >I'm just curious how many people have powered up their TRS-80 computers, >and ended up with a bang and a room filled with smoke? > >So far, I've gotten the fireworks in two out of two TRS-80s (model 3 and >4) when they were powered up. In both cases, the

Re: OT: shortening eBay URLSs (Was: IBM PT-2

2019-08-21 Thread Guy Dunphy via cctalk
Or to just the item number: 253997593352 Assuming your browser is going to expand typing eb to ebay.com, then you enter the item number in the ebay search box. Guy At 08:45 PM 21/08/2019 -0700, you wrote: >A small off-topic trivial tip: >That URL can be reduced to: >

Re: Identification of an HP minicomputer

2019-08-12 Thread Guy Dunphy via cctalk
Hi Guy, If you didn't see this, it may be of interest: http://everist.org/NobLog/20131112_HP_1000_minicomputer_teardown.htm It won't help you identify your system model, but could be of help with disassembly. Funny coincidence that we have the same name, and similar HP-1000 minicomputers.

Re: I'm sharing a toy

2019-08-08 Thread Guy Dunphy via cctalk
At 10:18 PM 7/08/2019 -0700, you wrote: >https://mvsevm.fsf.net >Adam WELCOME TO THE ANCIENT COMPUTER MVSEVM All systems are emulated, on Raspberry Pi and Linux. 1: Multics MR 12.6f (Honeywell 6800 DPS-8/M) 2: TOPS-20 7.1 (PDP-10 KL-10) 3: TOPS-10 7.03 (PDP-10 KA-10) 4: ITS (PDP-10 KA-10) 5:

Re: RSTS/RSX manuals available in the UK

2019-08-06 Thread Guy Dunphy via cctalk
Adrian, what order of volume and weight are these? I'm definitely interested, from a general preservation viewpoint, also a personal interest in lesser-known OS. And I have some PDP-11 systems to restore and play with. However I'm in Australia... Britain has a nice 'media mail' option - I buy

Re: Scanning question (Is destruction of old tech docs a moral crime?)

2019-07-23 Thread Guy Dunphy via cctalk
At 07:07 PM 23/07/2019 -0700, you wrote: >Nonetheless, comparing some small amount of lost information It's not a 'small amount of lost information', because destroying rare technical works in order to scan them, or afterwards because "now they are scanned there's no need to keep the paper

RE: Scanning question (Is destruction of old tech docs a moral crime?)

2019-07-22 Thread Guy Dunphy via cctalk
At 07:16 PM 22/07/2019 +0200, Mattis Lind wrote: >> BTW. I have three IBM 026 card punch machines as a future restoration >> project. But can I find >> a service manual? No. None online, only one for the later 028. And even if >> there was a PDF >Have you seen these:

Re: Scanning question (Is destruction of old tech docs a moral crime?)

2019-07-22 Thread Guy Dunphy via cctalk
At 10:41 AM 21/07/2019 -0600, you wrote: On Sun, Jul 21, 2019, 4:16 AM Joseph S. Barrera III via cctalk wrote: >I'd suggest that in 2019 when bits are cheap and high-quality scanners >nearly as cheap, "crappy quality digital image" is a bit of a straw man. >Yes, I've seen plenty of

Re: Scanning question (Is destruction of old tech docs a moral crime?)

2019-07-22 Thread Guy Dunphy via cctalk
At 12:48 AM 22/07/2019 -0600, you wrote: >On 7/21/2019 8:07 PM, Guy Dunphy via cctalk wrote: > >> BTW. I have three IBM 026 card punch machines as a future restoration >> project. But can I find >> a service manual? No. None online, only one for the later 028. And even if

RE: Scanning question (Is destruction of old tech docs a moral crime?)

2019-07-21 Thread Guy Dunphy via cctalk
At 07:58 PM 21/07/2019 -0700, you wrote: >> Even if the digital version _did_ fully capture the information content, I >> strongly dispute that the physical item/document has lost it's value. >> That 'digital is all we need' viewpoint is a trap for the naive, because: > >. . . and does it FULLY

RE: Scanning question (Is destruction of old tech docs a moral crime?)

2019-07-21 Thread Guy Dunphy via cctalk
At 01:48 AM 21/07/2019 -0400, Paul Birkel wrote: >If I may summarize/generalize, Guy, I think that your point is that there >are Technical Artifacts and there are Cultural Artifacts -- and the two sets >overlap to some degree. Where the overlap lies is subject to great debate, >IMO. Indeed.

Re: Scanning Results

2019-07-21 Thread Guy Dunphy via cctalk
At 03:57 PM 21/07/2019 -0600, you wrote: >On 7/21/2019 9:04 AM, Guy Dunphy via cctalk wrote: > >> Starting again with the clean full size scan, reduce to 1200 x 1620, (a good >> screen size) >> and 8 bit/px indexed. (Adequate for this page.) Saved file size: 339 KB. &g

Re: Scanning Results

2019-07-21 Thread Guy Dunphy via cctalk
At 09:05 PM 20/07/2019 -0700, Al wrote: > >> I wish I knew why ISO and Adobe never updated PDF to include PNG images. > >The pdf format supports png just fine. Oh does it! The texts say it doesn't, and it definitely didn't originally. Maybe the change is in one of the more recent ISO standards

Re: Scanning Results

2019-07-20 Thread Guy Dunphy via cctalk
At 11:41 PM 19/07/2019 -0600, you wrote: >OK. I've done the first of the manuals I have. Thanks for all the helpful >hints. > >I took apart the Rainbow User's Manual's metal spiral spine. I scanned it >with scansnap and ran it through the indexing function. I think I tweaked >the settings in a

RE: Scanning question (Is destruction of old tech docs a moral crime?)

2019-07-20 Thread Guy Dunphy via cctalk
I'm posting a private email (anonymized) and my reply because it's a significant issue. >{Note private reply} > >> When the scanning process involves destruction of the original work >> ... But if it's a rare document, or even maybe so rare that it's the >> last one, then destroying

RE: Scanning question

2019-07-20 Thread Guy Dunphy via cctalk
>> Have a look at >> https://www.indiegogo.com/projects/aura-speeds-simplifies-all-your- >> scanning-needs#/ >> >> Carl Claunch pointed me at this, he has one and I am sure he can >> comment >> further. I have ordered one. > >You can actually get them off of Amazon and they run specials on them

Re: Scanning question

2019-07-18 Thread Guy Dunphy via cctalk
At 08:51 PM 18/07/2019 -0600, you wrote: >On 7/18/19 3:50 PM, Warner Losh via cctalk wrote: >> So, I have a bunch of old DEC Rainbow docs that aren't online. I also >> have a snapscan scanner that I use for bills and such. >> >> There's four kinds of docs, and I'm looking for advice: > >I always

Re: Computer Reset shop, liquidation. (USA)

2019-07-17 Thread Guy Dunphy via cctalk
My net service dropped out yesterday, hence delayed reply. I did NOT expect that thread to take off. At 10:14 PM 16/07/2019 -0700, Al Kossow wrote: >> Exploring a MASSIVE Retro Computer Warehouse! > >old news, dredged up again because of a youtube jackass Ah yes, now I see there was exactly

Computer Reset shop, liquidation. (USA)

2019-07-16 Thread Guy Dunphy via cctalk
https://www.youtube.com/watch?v=rvM82T3C2Ik Exploring a MASSIVE Retro Computer Warehouse! via https://www.eevblog.com/forum/chat/lgr-retro-computer-warehouse/ To lessen risk of developing PTSD from watching that video, I'll mention that right at the end he explains there IS a process in place

Re: Mystery DEC backplane on eBay

2019-07-16 Thread Guy Dunphy via cctalk
At 07:30 PM 16/07/2019 -0400, you wrote: >For those who saw this item: > > https://www.ebay.com/itm/183639487495 > >but didn't know what it went to (Web searches for "5409818" and "5009817" >didn't turn up anything useful for me), it turns out to be a "Configuration >2" backplane for a

Re: Box of HP 1000 series MUX cards - 12040

2019-07-14 Thread Guy Dunphy via cctalk
At 12:38 AM 14/07/2019 -0400, Jesse Dougherty wrote: >Whats your deal dude? I'm not trolling anyone. I have hundreds of these >boards here.. I don't need 170 HP 1000 Series MUX cards. They just don't >sell that often for me to hold on to. What else do you want me to do >with them. Its crazy

Re: 5 1/4 diskettes available

2019-07-13 Thread Guy Dunphy via cctalk
At 06:43 PM 13/07/2019 -0700, you wrote: >> https://en.wikipedia.org/wiki/Diogenes >Without the exact zipcodes and weight, can't get exact postage. >However, it is likely to be "zone 6", for which parcel post for 1 pound is >$7.62. There are ways of getting some discounts, such as online

Re: Margaret Hamilton Guardian interview.

2019-07-13 Thread Guy Dunphy via cctalk
At 01:48 PM 13/07/2019 -0700, you wrote: >Another of the un-acknowledged people in the upcoming July 29 >'celebrations'. > >https://www.theguardian.com/technology/2019/jul/13/margaret-hamilton-computer-scientist-interview-software-apollo-missions-1969-moon-landing-nasa-women > >--lyndon Highly

Re: 5 1/4 diskettes available

2019-07-12 Thread Guy Dunphy via cctalk
>They confirmed my order. Fingers crossed they actually ship them, and it >doesn't >turn into an argument about honoring transactions. Though probably, a higher >postage >cost would be fair. 88 floppies and covers will weigh a bit. (Should have >bought 100.) >4 Pack of 5.25" Floppy Diskettes

Re: 5 1/4 diskettes available

2019-07-11 Thread Guy Dunphy via cctalk
At 03:47 PM 11/07/2019 -0500, you wrote: >> On 7/10/19 11:32 AM, Will Cooke via cctalk wrote: >> >> > https://www.bgmicro.com/4-pack-of-5-25-floppy-diskettes-with-sleeves.aspx >> >> They have hub rings, so they are probably 360K > >Weren't these 89 cents when this was first posted? Well they're

Re: 5 1/4 diskettes available

2019-07-10 Thread Guy Dunphy via cctalk
At 08:27 PM 10/07/2019 -0700, Grumpy Ol' Fred wrote: >The 5.25" diskette or "Mini-diskette" is bar napkin size, because Dr. Wang >said that 8" diskettes were too big. I have not been able to track down >WHICH bar. Perhaps the same bar where someone bet L Ron Hubbard that he couldn't create a

Re: 5 1/4 diskettes available

2019-07-10 Thread Guy Dunphy via cctalk
At 07:14 PM 10/07/2019 -0700, you wrote: >On Thu, 11 Jul 2019, Guy Dunphy via cctalk wrote: >> And the index hole. > >What about it? Because it's so long since I used any 360K floppies, that I could not recall if some didn't have any hole. (But I did remember about the soft/hard

Re: 5 1/4 diskettes available

2019-07-10 Thread Guy Dunphy via cctalk
At 12:25 PM 10/07/2019 -0700, you wrote: > > >On 7/10/19 11:32 AM, Will Cooke via cctalk wrote: > >> https://www.bgmicro.com/4-pack-of-5-25-floppy-diskettes-with-sleeves.aspx > >They have hub rings, so they are probably 360K And the index hole. Thanks Will, this is quite fortuitous. I've just

Re: Box of HP 1000 series MUX cards - 12040

2019-07-08 Thread Guy Dunphy via cctalk
At 12:18 PM 8/07/2019 +, jesse cypress-tech.com wrote: >If anyone wants 87 HP 1000 series mux cards for gold or to play around >with, I'm starting to clean house. The ebay link is below. > >https://www.ebay.com/itm/383039137321 Wow. Way to make everyone interested in restoring HP 1000

Re: Lots of Apple 1 computers @ VCF West

2019-07-06 Thread Guy Dunphy via cctalk
At 08:21 PM 5/07/2019 -0400, you wrote: >You could be sitting on $400K-$1,000,000. That's the current range of >decent-condition Apple 1 boards. I just _love_ being reminded of the circumstances of my NOT buying an Apple I, and what that mistake cost me.

Re: One of the deeper dives into RISC vs CISC I've seen

2019-06-25 Thread Guy Dunphy via cctalk
At 12:56 PM 25/06/2019 +0200, Liam Proven wrote: >On Mon, 24 Jun 2019 at 12:31, Tony Aiuto via cctalk > wrote: >> >> On a related note, a fun talk about ARM >> https://www.youtube.com/watch?time_continue=2045=_6sh097Dk5k > >Remarkable. Thanks for the link. Astounding. Very thought-provoking.

Re: irish cctech subscribers

2019-06-17 Thread Guy Dunphy via cctalk
Hi Ronan, I know you meant 'in Ireland.' But I can't resist: I'm of Irish ancestry, though born and residing in Sydney Australia. Also "My particular interest is in DEC pdp-8 and pdp11 machines." Never thought I'd actually have any, until unexpected events of 2018 and ongoing. Now so far I

Re: List search option?

2019-06-16 Thread Guy Dunphy via cctalk
At 08:59 AM 16/06/2019 +0100, you wrote: >There is a more complete archive here (with search facility): > >https://marc.info/?l=classiccmp > >Matt https://marc.info/ My God. A firehose of firehoses.

Re: List search option?

2019-06-15 Thread Guy Dunphy via cctalk
At 07:32 AM 12/06/2019 -0700, you wrote: > >> On Jun 12, 2019, at 7:13 AM, jesse cypress-tech.com via cctech >> wrote: >> >> Is there a list search option on the archives? As in if I wanted to find >> a relevant thread for part number ABC123 I could search that somewhere? > >A better question

RE: Things to do in Australia & New Zealand?

2019-05-20 Thread Guy Dunphy via cctalk
>Subject: Things to do in Australia & New Zealand? >From: Patrick Finnegan >I'm going to be in Australia and then New Zealand for most of June, and was >wondering if there was anything interesting classic computer wise to visit? >I'm planning on being in Sydney for the Australia half of the trip,

Re: Tape seals?

2019-05-19 Thread Guy Dunphy via cctalk
At 09:36 AM 18/05/2019 -0700, Chuck wrote: >There may be better solutions, but I haven't come up with one yet. It's >a bit funny; I can remember when the tape seal adoption was causing >dumpster-loads of hard plastic tape cases to be scrapped. The cases >that remain tend to be intact, even after

Re: Televideo 925 character rom dump

2019-04-24 Thread Guy Dunphy via cctalk
Thanks, I'll check that. At 07:48 AM 24/04/2019 -0500, wrco...@wrcooke.net wrote: > >> On April 24, 2019 at 7:39 AM Guy Dunphy via cctalk >> wrote: >> > >> I haven't dumped the chargen chip yet, because I don't know what it is, and >> suspect it's mor

Re: Televideo 925 character rom dump

2019-04-24 Thread Guy Dunphy via cctalk
At 08:14 AM 24/04/2019 -0700, you wrote: > > >On 4/24/19 5:39 AM, Guy Dunphy wrote: > >> The keyboard controller is an 8049. Firmware not readable. > >8049s aren't protected. they are 2k versions of the 8048 >and can be read as 8749s I did try reading it as an 8749. By 'not readable' I meant it

Re: Televideo 925 character rom dump

2019-04-24 Thread Guy Dunphy via cctalk
At 04:34 PM 23/04/2019 -0700, you wrote: > > >On 4/23/19 3:35 PM, Guy Dunphy via cctalk wrote: [my Televideo 924] > >I have maint manuals for the 925. > >Some photos of the boards and dumps of the keyboard firmware and controller >would be nice to add to bitsavers, si

Re: Televideo 925 character rom dump

2019-04-23 Thread Guy Dunphy via cctalk
When I saw this thread I thought 'Oh, I have a 925!' Which was working last time (years ago.) But wouldn't you know. When I checked, it's a Televideo 924. Off by one. But perhaps the character ROM content is the same? Anyway I will see if it still works, and secure all the ROM images. Today. I

Re: PDP-8: count number of set bits in a word

2019-04-05 Thread Guy Dunphy via cctalk
At 08:49 PM 5/04/2019 +, you wrote: >Hi Kyle, > >hat's a really interesting problem, and the government (NSA) wanted this badly >and done FAST. > >they asked Seymour Cray to create a specific instruction for this and they >called it 'population count' > >Anybody know the why and how it is

Re: Yes there is a PDP 10 front panel and Kenbak on Ebay

2019-04-04 Thread Guy Dunphy via cctalk
At 10:17 PM 4/04/2019 -0500, you wrote: >These are very different. That older one was really just a case - it >had no lights, perhaps no actual switches (I am guessing not), and >certainly no circuit boards. This one has that stuff (and I see that >the price has gotten to an amount I once bid on

RE: Not DEC related but still hoping for some help: Problems w/ LJ 4+ Printer

2019-04-02 Thread Guy Dunphy via cctalk
Or the drum isn't getting charged in the first place, before light exposure then toner dusting. A way to check this: while the machine is in mid-copy, cut the power then open it up and look at the drum. Is there a toner image adhered to the drum section between where the surface is

Re: Pioneers of computing

2019-03-10 Thread Guy Dunphy via cctalk
At 06:59 PM 10/03/2019 -0400, you wrote: > >> On March 10, 2019 at 6:10 PM ben via cctalk wrote: >> >> >> On 3/10/2019 3:18 PM, Murray McCullough via cctalk wrote: >> > Back in 1965 Jack Kilby, Jerry Merryman and James Van Tassel at texas >> > Instruments created an integrated circuit designed

Re: OT: Phone museum seeks new owner

2019-02-19 Thread Guy Dunphy via cctalk
At 01:11 PM 19/02/2019 -0800, you wrote: >>> Old tech, but not computers: >>> https://madison.com/business/galesville-antique-phone-dealers-looking-to-offload-vast-collection/article_b1845009-c861-50ff-82c8-60a15866fc6d.html > >On Tue, 19 Feb 2019, Peter Coghlan via cctalk wrote: >> 451:

Re: Kemners Surplus - Real time walkthrough

2019-02-17 Thread Guy Dunphy via cctalk
At 01:51 PM 16/02/2019 -0500, you wrote: >Hi everyone, > >I heard Kemners Surplus in Pottstown, PA was going away so I decided to pay >them a visit. I'm taking pictures of as much vintage computing gear as I >can as we speak. I'll be here until they close today at 5pm EST, so if you >see something

Re: HP 1000 A class series boards

2019-01-27 Thread Guy Dunphy via cctalk
Hello Jesse, I have this: http://everist.org/NobLog/20131112_HP_1000_minicomputer_teardown.htm It's a stalled project, due to unfortunate circumstance. I was at the point of preparing to reassemble the machine (after cleaning) and start testing. Wanted to first test the power supply under

Re: Interest in a DiscFerret?

2019-01-10 Thread Guy Dunphy via cctalk
At 12:03 PM 10/01/2019 -0800, you wrote: >On Thu, 10 Jan 2019, Guy Dunphy wrote: >> All my Apple II disks are DOS 3.2. When 3.3 came out, it was a) too much >> trouble >> to convert everything up, and b) ... read that 'missing the wave' story. >> It gave me a sour feeling about 3.3. Totally my

Re: Interest in a DiscFerret?

2019-01-10 Thread Guy Dunphy via cctalk
At 09:07 AM 10/01/2019 -0400, you wrote: >One problem you may encounter reading LIF format diskettes on a PC using >these tools is many LIF diskettes are formatted 256 bytes/sector and >there is lots of PC diskette controller out there that cannot deal with >that including all USB diskette

Re: Interest in a DiscFerret?

2019-01-10 Thread Guy Dunphy via cctalk
At 09:43 AM 10/01/2019 +0100, you wrote: >On Thu, 10 Jan 2019, Guy Dunphy wrote: >> * Also I have some old HP equipment that uses HP-format floppies. LIF? >Now that is as easy as it can be. There's lif_utils from Tony Duell >(http://www.hpcc.org/datafile/hpil/lif_utils.html), or the HP LIF

Re: Interest in a DiscFerret?

2019-01-10 Thread Guy Dunphy via cctalk
At 07:34 PM 9/01/2019 -0800, you wrote: >On Thu, 10 Jan 2019, Guy Dunphy via cctalk wrote: >> ... >> What other all-formats floppy R/W and data recovery tools do people here >> know of? >> Comments of their functionality? > >A couple

Re: Interest in a DiscFerret?

2019-01-09 Thread Guy Dunphy via cctalk
At 03:39 PM 9/01/2019 -0500, you wrote: > >I had the bug to do something similar.. then I found SuperCard Pro. >It's closed hardware but the USB protocol is fully documented. Because >if that, it's almost a perfect commodity turn-key hardware bridge to raw >flux-level transitions - in or out.

Re: Anyone want an irman (Infrared to serial dongles)

2019-01-08 Thread Guy Dunphy via cctalk
At 11:05 PM 8/01/2019 +, you wrote: >While tidying up I've found a few Irman infrared to serial dongles > >https://web.archive.org/web/20060314052558/http://www.evation.com/irman/index.html > >they connect via a 9 pin serial plug and then convert any consumer >remote IR signals they receive

Re: Bogus "account hacked" message

2019-01-08 Thread Guy Dunphy via cctalk
At 08:56 PM 8/01/2019 -0600, you wrote: >On 01/08/2019 04:33 PM, Fred Cisin via cctalk wrote: >> On Tue, 8 Jan 2019, allison via cctalk wrote: >>> SStandard lockout after three fails i 15 minutes.� >> >> Howzbout: >> a quarter second lockout after a fail; >> double that for each subsequent fail.

On Scanning

2019-01-01 Thread Guy Dunphy via cctalk
This may be a good place to mention a text I began writing some while ago: On Scanning. http://everist.org/temp/__On_scanning.htm Meant to be a 'how to' about scanning and post-processing techniques, written as I explored that myself. It's not finished because I was working on a solution to

Re: Happy New Year!

2019-01-01 Thread Guy Dunphy via cctalk
At 06:48 AM 1/01/2019 +, you wrote: > >Happy  New  Year  to all! >Ed# > >Sent from AOL Mobile Mail So, no new year's resolution about not typing extra spaces after words, Ed? Well maybe next year? Best wishes to all, and hopefully 2019 will bring everyone lots of interesting classic

Re: KIP 2050 image scanner

2018-12-31 Thread Guy Dunphy via cctalk
At 03:10 AM 31/12/2018 -0600, you wrote: >I know of one outside of Chicago that is as is. I might be ab;e to move it >a state or two or help out with the arrangements. I know nothing about >it, but I can text or email 2 pics. > >Paul User manual:

Re: wanted back issues IEEE ANNALS OF THE HISTORY OF COMPUTING bound or unbound... dtop us a line off list please.

2018-12-29 Thread Guy Dunphy via cctalk
At 12:05 PM 29/12/2018 -0800, Al Kossow wrote: >On 12/29/18 12:00 PM, Chuck Guzis via cctalk wrote: >> Stupid question, but doesn't IEEE CS already have these archived? > >of course they are > >we are speaking with paper obsessed siverfish lovers here though > Coming from you that's a worrying

Re: Want/Available list

2018-12-20 Thread Guy Dunphy via cctalk
At 10:50 PM 20/12/2018 +0100, you wrote: >> How about you not join a nearly 20 year old mailing list and start >> insulting people, most of which have probably been in the computer >> industry longer than you've been alive? > >insulting? I posted a link to a project just to share the fun and I

Re: Want/Available list

2018-12-20 Thread Guy Dunphy via cctalk
At 09:03 PM 20/12/2018 +0100, Carlo Pisani wrote: >ok, I give up. >a forum with a bazaar should be more appropriate >frankly this mail list looks like spam, and it's going irritating >since it's difficult to follow and to handle True. I don't have time to read all messages either. Haven't yet

Re: BIG ol tektronix scope 555 - need it gone - make an offer

2018-12-11 Thread Guy Dunphy via cctalk
At 08:34 AM 11/12/2018 -0800, Marc wrote: >That's a beautiful old scope setup. I have a friend who collects this >stuff but he is very low budget and on the opposite side of the country >like me. Heh. How about 'no budget, and opposite side of the world'? Do I win?

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