Re: Parts help - need flight SRAMs

Quick search found it here. http://www.asap-memory.com/search.aspx?searchby=partno&searchkey=5962H9954103QXC MFD By BAE and Fairchild Wayne On Jun 5, 2018, at 6:06 PM, Eric Smith via cctalk mailto:cctalk@classiccmp.org>> wrote: On Tue, Jun 5, 2018 at 8:47 AM, Tapley, Mark via cctalk < cctalk

Re: 360 Technologies selloff

They still have am active ebay store, though. Continental Computers Wayne On Jul 15, 2018, at 9:51 PM, Marc Howard via cctalk mailto:cctalk@classiccmp.org>> wrote: I'm not sure Continental Computer is still in business. www.conticomp.com doesn't respond anymore. Si

Re: MOS MCS2529 math chip

Here's a link to the instruction manual. http://www.wass.net/manuals/Melcor%20SC-635.pdf Note that it says to have the battery in place if you want to run it off the external ac adaptor. Sent from my iPhone On Jul 20, 2018, at 14:06, Brent Hilpert via cctalk mailto:cctalk@classiccmp.org>> wro

Pdp 11/34 System for sale in Riverside,ca

http://www.ctonlineauctions.com/detail.asp?id=746466 >From the pictures it looks to be a fairly complete system with Kennedy tape >drive. Has a System industries controller but doesn't appear to have a disk drive. I'd love to have it, but my wife would kill me if i brought something that big h

RE: Pdp 11/34 System for sale in Riverside,ca

ows 10 From: cctalk on behalf of Mark J. Blair via cctalk Sent: Wednesday, August 8, 2018 12:43:09 PM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: Pdp 11/34 System for sale in Riverside,ca > On Aug 1, 2018, at 8:32 AM, Wayne S via cctalk wrote: > > http://www.ctonl

Re: Advice requested on proper disposal of Seagate ST3000DM001 disk drives

Be aware that a cheap way of making fairly pure oxygen is just by heating up manganese dioxide, which will cause anything that is a like a flame to burn much hotter. I remember doing an experiment in grade school where you heat up a tablespoonfull of MD in a test tube with an alcohol burner or

Re: Altos 386/1000 boot/diags images?

There's a guy here in So Cal that has a bunch of vintage computers including an Altos. I haven't seen it personally but he has a Craigslist ad. Said he put it on ebay and sold it but didn't want to ship because it's real heavy, so i guess the deal fell thru. Current ad says $300 for all. Sent

Re: Altos 386/1000 boot/diags images?

Al, I don't know much about them, only from discussions on this list. Thought maybe there were only one or two models made and thus maybe there was interest in any model, even if it's just for parts. As an aside, i'll be up in SF in late October and hope to stop by the museum. Sent from my

Re: Microsoft-Paul Allen

Sent from my iPhone > On Oct 18, 2018, at 15:01, Fred Cisin via cctalk > wrote: > > Thank you for the correction. > > Yes, companies often change their names. > > Gary Kildall founded Intergalactic Digital Research. > > George Morrow founded Thinker Toys, which later became Morrow's Micro

Re: BBS card, ISA8bit multi serial, 4 channels

A company i worked for bought a small healthcare "utilization review" company in the @1983 and they had 5 pc's with just that configuration with contractor written software. We replaced it with a Microvax II. Sent from my iPhone On Nov 1, 2018, at 10:29, Fred Cisin via cctalk wrote: >>> We h

Re: non-shunting jumpers?

I’ve just stripped off a short piece of insulation from hookup wire and slipped it over the pin.Fits tight and can be removed and it's cheap. Sent from my iPhone > On Oct 22, 2020, at 14:33, Maciej W. Rozycki via cctalk > wrote: > > On Thu, 22 Oct 2020, Chuck Guzis via cctalk wrote: > >>> A

Re: non-shunting jumpers?

And environmentally conscious because it’s recycling. -: Sent from my iPhone > On Oct 22, 2020, at 15:21, Maciej W. Rozycki wrote: > > On Thu, 22 Oct 2020, Wayne S wrote: > >> I’ve just stripped off a short piece of insulation from hookup wire and >> slipped it over the pin.Fits tight and c

Re: Macro-10 humour

Byte magazine in the late 70’s had a list of funny mnemonics like this. My fav was SDSD - Seek Data and Scar Disk. Sent from my iPhone > On Dec 14, 2020, at 07:54, Don Stalkowski via cctalk > wrote: > > I came across this among some junk I had. > > Don > > .TY NEMON.DOC > >

Re: Looking for a potentiometer for restoration project

Out of curiosity, why do you think the pot is bad? Wayne Sent from my iPhone > On Jan 19, 2021, at 14:28, Ali via cctalk wrote: > >  >> >> For a workaround: >> >> 1. Solder any same size pot with suitable long wires to the location >> (if possible) >> 2. Adjust the brightness to Your liki

Re: Looking for a potentiometer for restoration project

Just for clarification, a pot has 3 tabs. Ohmeter measuring across the 2 “end” tabs should indicate the total resistance of the pot (10k, 50k, 500k ohms, whatever the schematic says). If the measurement is infinite then the potentiometer is open broken. If you get that reading, you might want to

Vax/pdp on ebay

Is anyone from this list bidding on this. If so i’ll back out. Just don’t want it to be “recycled “ and i have room for it. https://www.ebay.com/itm/Digital-DEC-BA23-Lot-Micro-PDP-11-73-VAXstation-3200-x2-VT220-x2-Extras-Docs/224368924502?hash=item343d6e1756:g:zp8AAOSwvWNgO9qe Sent from my

[cctalk] Re: CDC Cyber 180/8xx PSU

Didn’t all the IBM mainframes use 400hz? Maybe ask the IBMers how they got 400hz. Also, can the local power company supply it? Sent from my iPhone > On Oct 12, 2024, at 14:03, Nigel Johnson Ham via cctalk > wrote: > > Hmm, I think the 40 years has expired, so I can tell the story of the MG a

[cctalk] Re: Valuable floppy archiving: seeking current best practice

My pleasure. Be aware that not all floppy disks were written the same way. Regardless of different filesystems, there were different flux encoding schemes too. Sent from my iPhone On Oct 9, 2024, at 15:07, Tom Stepleton wrote:  Thanks Wayne! It's handy to get topical advice, as interesting a

[cctalk] Re: Valuable floppy archiving: seeking current best practice

Tom, make sure to clean the heads of the floppy drive and check the heads to see if they don’t have any sharp edges, from excessive wear, that could damage the disk. Also spin it up with a scratch disk to see if it spins okay. Check the source disk for mold and dirt and see if it spins smoothly

[cctalk] Re: Valuable floppy archiving: seeking current best practice

Roger are you aware of Applesauce and Greaseweasel? Sent from my iPhone > On Oct 9, 2024, at 11:50, ben via cctalk wrote: > > On 2024-10-09 4:08 a.m., Liam Proven via cctalk wrote: >>> On Wed, 9 Oct 2024 at 04:37, ben via cctalk wrote: >>> Dos also has no subdirectories. >> (?) > > >>> So d

[cctalk] Re: Valuable floppy archiving: seeking current best practice

Re: Obscure disk formats. There is a couple projects with hardware that attempt and are pretty successful at doing this, including decoding the many copy protection schemes. Applesauce seems to be the most successful due to the creator being very involved and responsive to solving new issues. The

[cctalk] Re: Ward Christensen (BBS, XMODEM) has died

When my mom died, at home , at age 99, the ambulance people said that an autopsy has to be performed when someone dies at home. The police also came and said the same thing. When my mother-in-law passed, in the hospital, no autopsy needed to be done. I did not ask specifics in either case. Sent

[cctalk] Re: Ward Christensen NY Times Obituary

I did compuserve. It was about $10 a month. They had a lot of local numbers so you didn’t have to pay Toll charges. Never had any problems logging in except during a “construction event”. Meaning some backhoe operator sliced a cable in the street somewhere. No graphics, just text. Used Archie a

[cctalk] Re: Ward Christensen NY Times Obituary

> The readers are different and the writers have to find ways to relate. > Depending on your perspective, BBSes were the social systems of the > time. I can see the link between them. > > I thought it was well written and regardless of what you think of the > Times, it is nice to see Ward

[cctalk] Re: Ward Christensen NY Times Obituary

They must’ve inserted it after i read the obit, because it wasn’t there. Maybe Christian made them aware of the fuss. Sent from my iPhone > On Oct 24, 2024, at 12:01, Sellam Abraham via cctalk > wrote: > > I went and read the obit to see what all the hubbubb is aboot. Seems like > a nice tr

[cctalk] Re: Old TMS3202x Software?

Dropbox works for this kinda stuff. Sent from my iPhone > On Oct 28, 2024, at 12:17, jake utley via cctalk > wrote: > > So it looks like I can’t upload to archive.org for a bit of time but I’ll > have a look and see if I can put it somewhere I can share. > Sent from my iPhone > >>> On 27 Oc

[cctalk] Re: Ward Christensen NY Times Obituary

Fred, probably there was no death file for Ward so the writer had to start from scratch. Associated Press has a deaths wire where they put up obits of people of interest. I’d assume that’s how NYT even knew about Ward. It’s interesting to me that they bothered to put up his obit as he is mildly

[cctalk] Re: Ward Christensen NY Times Obituary

I have to respectfully disagree. This is an obituary for a person who has died, which is not a complete history of his life. The articles are rather lengthy, for an obituary in a major newspaper where space is limited. I think the author did do some rather deep investigation. He did talk to Ward

[cctalk] Re: Ward Christensen NY Times Obituary

, what accomplishments would you emphasize? Sent from my iPhone > On Oct 23, 2024, at 14:10, Fred Cisin via cctalk > wrote: > > On Wed, 23 Oct 2024, Wayne S via cctalk wrote: >> I have to respectfully disagree. >> This is an obituary for a person who has died,

[cctalk] Re: Ward Christensen NY Times Obituary

Phone caught the “What did you say” phrase. Please disregard! Sent from my iPhone > On Oct 23, 2024, at 12:40, Wayne S wrote: > > Author is a general assignment reporter. Not young judging from his mugshot. > Wouldn’t expect him to cover XM modem too much as that’s for very technical > peopl

[cctalk] Re: Ward Christensen NY Times Obituary

Author is a general assignment reporter. Not young judging from his mugshot. Wouldn’t expect him to cover XM modem too much as that’s for very technical people and wouldn’t be relevant to his article. If David Pogue wrote the article then perhaps All in all a very good article what did you say?

[cctalk] Re: Ward Christensen NY Times Obituary

Sent from my iPhone > >>> On Oct 23, 2024, at 14:10, Fred Cisin via cctalk >>> wrote: >>> >>> On Wed, 23 Oct 2024, Wayne S via cctalk wrote: >>> I have to respectfully disagree. >>> This is an obituary for a person who has died, whic

[cctalk] Re: Might be antique computer parts

If no takers, donate them to Goodwill. They’ll put them up on their web site and someone will buy them. And you can get a tax deduction. Sent from my iPhone > On Sep 30, 2024, at 14:23, Paul Koning via cctalk > wrote: > > One application for devices like that would be vacuum tube power amp

[cctalk] Re: looking for HP 1640B GPIB info

Bitsavers has some manuals for 1630 and 1650. Maybe those will give you enough info to be useful? Sent from my Dec Alphastation 200 > On Nov 7, 2024, at 13:49, Sytse van Slooten via cctalk > wrote: > > Yeah I saw that, but I'm a bit reluctant to blindly pay USD 50 for something > that migh

[cctalk] Re: looking for HP 1640B GPIB info

There are some available on ebay. Just search “hp 2640b” Sent from my Dec Alphastation 200. > On Nov 7, 2024, at 11:41, Sytse van Slooten via cctalk > wrote: > > Hi all, > > I have a HP 1640B that I'm trying to get to work. However I can't find any > information about it, and while the mach

[cctalk] Re: Ward Christensen (BBS, XMODEM) has died

When someone dies at home with no doctor present, an autopsy is always done and it takes awhile. Sent from my iPhone > On Oct 15, 2024, at 16:17, Fred Cisin via cctalk > wrote: > > Here is a little more information: > https://arstechnica.com/gadgets/2024/10/ward-christensen-bbs-inventor-and-

[cctalk] Re: Ward Christensen (BBS, XMODEM) has died

Don’t know when it started, but at least 30 years. Cause of death is a must. Sent from my iPhone > On Oct 15, 2024, at 17:44, Ali wrote: > >  >> >> When someone dies at home with no doctor present, an autopsy is always >> done and it takes awhile. > > Since when? > > -Ali >

[cctalk] Re: The 8086

Why did those processors not catch on? It seems to me that hardware people had a “if we build it, they will come” mentality and hoped other companies would adopt it and actually write software to make it useful. Sent from my iPhone > On Nov 16, 2024, at 17:38, Chuck Guzis via cctalk > wrote:

[cctalk] Re: Open source a panacea?

Open source is only safer in that the source code is available to be analyzed and compiled into something usable. Even if you compile the source, there still might be “unsafe” things in it, hence it should be analyzed first. If safety is of paramount importance, a supplied object or executable s

[cctalk] Re: Open source a panacea?

Alex, your posts come over with the “flag” set (i get a red “flag” on my iphone). Did you mean to flag all your responses for some reason ? Sent from my iPhone > On Feb 3, 2025, at 13:15, Alexander Schreiber via cctalk > wrote: > > On Mon, Feb 03, 2025 at 03:54:31PM -0500, Paul Koning via

[cctalk] Re: Open source a panacea?

Sent from my iPhone > On Feb 3, 2025, at 13:15, Alexander Schreiber via cctalk > wrote: > > On Mon, Feb 03, 2025 at 03:54:31PM -0500, Paul Koning via cctalk wrote: >> >> >>> On Feb 3, 2025, at 3:40 PM, Alexander Schreiber via cctalk >>> wrote: >>> >>> ... On top of that: A lot of those L

[cctalk] Re: Open source a panacea?

To all, i do think the meaning of “Safer” needs to be explained in the context of this debate. Sent from my iPhone > On Feb 3, 2025, at 12:57, Ethan Dicks via cctalk > wrote: > > On Mon, Feb 3, 2025 at 2:08 PM Donald Whittemore via cctalk > wrote: >> I am an old mainframe guy. I could give

[cctalk] Re: Open source a panacea?

You do not have that absolute ability to know. You can rely on a virus scanner to help but that’s not absolute either. Sent from my iPhone > On Feb 3, 2025, at 12:51, Donald Whittemore via cctalk > wrote: > > If I don’t have the code expertise or compiling capability how do I know the > e

[cctalk] Re: RS232 then and now

Steve, remember that digital electronics ( I.E. integrated circuits like uarts) weren’t around during the early days of data transmission. It was all analog back then, coils, capacitors, and resistors, so then ideas regarding fast transmission had to wait for the technology to evolve. Then as i

[cctalk] Re: Open source a panacea?

Re: flag. I just get a red flag 🚩 as a high priority alert. Sent from my iPhone > On Feb 4, 2025, at 04:15, Alexander Schreiber wrote: > > for

[cctalk] Re: VT-100 Text Windows library

Mike, you might want to just write the vt stuff from scratch. The vt uses escape sequences for control and there’s really not much to it as the terminal will do all the work for you. We used to do it using DEC DIBOL to do data entry in fields from RSTS. The MCBA Accounting programs written in DI

[cctalk] Re: VT-100 Text Windows library

Mike, is the system really without an operating system? So no cursor control at all? Sent from my iPhone > On Dec 9, 2024, at 18:03, ben via cctalk wrote: > > What about porting the old share-ware window libraries for dos? > >

[cctalk] Re: very old UNIXes software, contact at typewritten?

Kinda wierd site. It looks like it’s a listing of documents and software but you can’t download or request anything. Sent from my iPhone > On Dec 13, 2024, at 12:03, Ali via cctalk wrote: > >  >> >> I can only conclude that >> he >> is someone who enjoys having a private collection and show

[cctalk] Re: QIC Archival

Is this the same software? Sent from my iPhone > On Dec 13, 2024, at 15:36, Cameron Kelly via cctalk > wrote: > > Would it be possible to do something like this myself? I’ve been highly > advised to get someone who knows what they are doing, do it but some other > people seem to imply that

[cctalk] Re: QIC Archival

Forgot the link winworldpc.com [X] Sent from my iPhone On Dec 13, 2024, at 15:43, Wayne S wrote: Is this the same software? Sent from my iP

[cctalk] Re: VT-100 Text Windows library

Oh. You didn’t specify the host type, although an esp MAY be fast enough. The Vax wasn’t that fast to begin with and ran in less than 4 MB memory so maybe… Sent from my iPhone > On Dec 5, 2024, at 15:20, Mike Katz wrote: > > Thank you > > i don't think an ESP32 has the horsepower to run VMS🙂

[cctalk] Re: VT-100 Text Windows library

Under VMS i think the smg$ routines did that. Sent from my iPhone > On Dec 5, 2024, at 14:43, Mike Katz via cctalk wrote: > > I am looking for a C library that implements a crude windowing system on a > VT-100 or compatible terminal via the serial port. I've seen such things > before but no

[cctalk] Re: VT-100 Text Windows library

Yep. I missed the “bare metal” Sent from my iPhone > On Dec 5, 2024, at 16:31, Mike Katz wrote: > > I'm sorry I thought bare metal (no operating system) was descriptive enough. > > To clarify I will be running this on an Doit ESP32 Devkit V1 Board with a > dual core Tensilica Xtensa L6 CPU r

[cctalk] Re: Looking for bootable floppy image for a PDP11/20

Try here… From an old newsgroup Just a note that Jerome Fine collected together a set of 24 RT-11 releases (from V01-15 on a DECtape to V05.07 on an RL02 disk) in the form of a consolidated CD-ROM image. You can download the CD-ROM from http://pdp-11.classiccmp.org/RT-11/dists/RT11DV50.ISO.zip

[cctalk] Re: Looking for bootable floppy image for a PDP11/20

Martin, sent you a Digital Equipment Corp discord invite. You should br able yo get zll you questions answered there. Sent from my iPhone > On Jan 20, 2025, at 16:04, Martin Eberhard via cctalk > wrote: > > I looked at those images on Bitsavers. As far I understand, an RX211 > controller ca

[cctalk] Re: AI? Really?

And DEC used one to help configure systems. It would tell you if your configuration would work or if you left anything out. We wanted a Vax 785 with 6 massbuss adapters but it told us the buss was too long and would intermittently time out. Sent from my iPhone > On Jan 18, 2025, at 11:17, Paul

[cctalk] Re: AI? Really?

They both died when Dr. Jones Journal stopped publication, as did many other topics. I miss that Magazine. Sent from my iPhone > On Jan 18, 2025, at 11:40, Chuck Guzis via cctalk > wrote: > > On 1/18/25 11:17, Paul Koning wrote: >> > >> Expert systems have always been considered a kind of

[cctalk] Re: AI? Really?

Make that Dr. DOBBS … Sent from my iPhone > On Jan 18, 2025, at 11:49, Wayne S wrote: > > They both died when Dr. Jones Journal stopped publication, as did many other > topics. > I miss that Magazine. > > Sent from my iPhone > >>> On Jan 18, 2025, at 11:40, Chuck Guzis via cctalk >>> wrot

[cctalk] Re: Try Algol 68 on Windows

Re: “Algol seemed to vanish off the face of the earth. “ I think the popularity of languages is due to how trendy they are to teach in Colleges. Witness the popularity of Python. That’s being taught in school these days. Sent from my iPhone > On Jan 13, 2025, at 13:11, Paul Koning via cctalk

[cctalk] Re: Print chain for 1403

For the people who worked at IBM, what was the difference between an “FE” and “CE” ? Sent from my iPhone > On Dec 23, 2024, at 07:47, Paul Berger via cctalk > wrote: > >  > On 2024-12-23 05:11, Nico de Jong via cctalk wrote: >>> >> When I was an operator, we once had a visit from a CE who h

[cctalk] Re: Print chain for 1403

We were a fairly big IBM site and we had a full-time CE on site with his own office/storage room in the computer room. He could go to any other site if IBM needed him to do that. Periodically, Field Engineers would visit as well. I couldn’t tell the difference from those guys. They even dressed

[cctalk] Re: Elliott Algol

6 bit characters were used by CDC 24 bit machines. 4 chars per 24 bit word. Sent from my iPhone > On Feb 15, 2025, at 12:29, Van Snyder via cctalk > wrote: > > On Sat, 2025-02-15 at 08:51 -0600, Adrian Stoness via cctalk wrote: >> wiki has always been this way. it has stricks standards if so

[cctalk] Re: RS232 - parallel modems!?

I don’t see the attachment. Sent from my iPhone > On Feb 15, 2025, at 13:22, Mike Stein via cctalk > wrote: > > In the keyboard section of the attached document there are instructions for > testing with a terminal & USB>TTL RS-232 adapter. > >> On Sat, Feb 15, 2025 at 12:43 AM Steve Lewis w

[cctalk] Re: Westhead acosiates

I assume “DPM” is Drive Positioning Module”? Sent from my iPhone > On Mar 23, 2025, at 14:50, Adrian Stoness via cctalk > wrote: > > Curious if there's anything in the community on them > > They made a cpm based system that was used in HMI control room settings in > the 80's I've got the ma

[cctalk] Re: Philips P3800 key lock swtch

Did you look on easykeys.com? They say that if you send pix they might be able to identify the blank. Easykeys.com Sent from my iPhone > On Apr 7, 2025, at 11:34, Dennis Boone via cctalk > wrote: > >  >> >>> Can you post a picture of what you can see? > >> Can't post photos here, > > Tony

[cctalk] Re: RS232 Spec

Wikipedia says it was defined in 1960 although their cite links don’t seem to work. If that helps! Sent from my iPhone > On Apr 20, 2025, at 08:01, Chuck Guzis via cctalk > wrote: > > On 4/20/25 04:11, Steve Lewis via cctalk wrote: > >> Anyway, just poking around, no specific question here :

[cctalk] Re: Looking for VAX/VMS v4.x Software

Christian, i’m on the discord but I haven’t seen your request. I think either Credicki or Silent700 has put together a few turnkey VMS systems, so you might want to ask again. Sent from my iPhone > On Apr 15, 2025, at 10:27, Paul Koning via cctalk > wrote: > >  > >> On Apr 15, 2025, at 11:4

[cctalk] Re: Mac SE disk cleaning

There’s lots of article on this just google If you want to make sure, just delete the files in question and write a program that opens a file, writes about a 1 mb string of zeros to it , then closes it Repeat until disk is full. Then delete the files that were created. Disk was about 20 mb capac

[cctalk] Re: IDT 49C402BG84 Pinout?

Try here. Might have to create an account. IDT - 49C402BG84 jotrin.com [favicon.ico] Sent from my iPh

[cctalk] Re: Elliott Algol

Is it posted anywhere? Sent from my iPhone > On Feb 16, 2025, at 12:41, Van Snyder via cctalk > wrote: > > On Sun, 2025-02-16 at 13:08 -0500, Paul Koning via cctalk wrote: >> You might want to look at the GCC internals manual. GCC has an >> explicit layering, with front end processing steps

[cctalk] Re: Classic computers with more than one stack pointer, but not FORTH machines.

That’s a side channel attack. If there ever was one. Was there ever a proof of concept made of that theory ? Sent from my iPhone > On Feb 21, 2025, at 13:06, Paul Koning via cctalk > wrote: > > the

[cctalk] Re: DEC Unibus variants

You might want to ask your questions on the Digital Equipment discord. Tony Bilquest could probably answer them. Including an invite… Join the The Digital Equipment Corporation Fan Spot Discord Server! discord.gg

[cctalk] Re: Westhead acosiates

Sorry. PDM as in PDM 800 series. Was just gonna say that,if so, it’s probably a one-off system that was specified by the Mine Company and custom programmed by Westhead. Hardware is probably off the shelf pc with interfaces to Opto22 type controllers. Could also be Allen-Bradley or Siemens contro

[cctalk] Re: DEC Unibus variants

Nice bits of info 😀 Sent from my iPhone > On Mar 29, 2025, at 13:06, Milo Velimirović via cctalk > wrote: > >  > >> On Mar 29, 2025, at 12:33 PM, shad via cctalk >> wrote: >> >> Hello, >> I'm searching information about all existing variants of DEC Unibus in >> Dual/Quad/Hex flavors.

[cctalk] Re: Why I am not worried about AI taking over the world!

I’ve not had good luck with any PA’s so I won’t see them. Their diagnosis is supposed to be reviewed/approved by a real Doctor, but I don’t think that happens like it’s supposed to. Sent from my iPhone > On Apr 3, 2025, at 16:23, Chuck Guzis via cctalk > wrote: > > On 4/3/25 16:12, Jon Els

[cctalk] Re: Looking for IBM System/3 BASIC book

Just for clarity IPL = Initial Program Load IMPL = Initial Machine Program Load Sent from my iPhone > On May 8, 2025, at 15:23, Steve Lewis via cctalk > wrote: > > Makes sense, IPL (instruction program load?) - how were the disk packs > initialized to indicate it was an IPL media? I assume

[cctalk] Re: Problems with an RQDX3 in an 11/23.

Csr correct? Sent from my iPhone > On May 23, 2025, at 16:58, Bill Degnan via cctalk > wrote: > > Cable and termination? > >> On Fri, May 23, 2025 at 6:48 PM Peter Ekstrom via cctalk < >> cctalk@classiccmp.org> wrote: >> >> Hello to the group, >> >> I have been banging my head against a PD

[cctalk] Re: Is there a more modern replacement for paper tape punch/reader

P.S. I have some experience imaging on Computer to Plate machines using lasers. It’s more difficult than it sounds. Lasers create a lot of issues. Sent from my iPhone > On Jun 22, 2025, at 14:48, Wayne S wrote: > > I think you could get around any potential damage by running the tape > betw

[cctalk] Re: Is there a more modern replacement for paper tape punch/reader

I think you could get around any potential damage by running the tape between 2 thin flat pieces of metal that had holes drilled vertically that lined up with the laser. Would have to determine what power laser was needed, if you needed more than one laser to get speed — maybe one for each hole

[cctalk] Re: Is there a more modern replacement for paper tape punch/reader

do that and was curious about if mine were unusual in that way. Sent from my iPhone > On Jun 24, 2025, at 12:34, ben via cctalk wrote: > > On 2025-06-24 12:45 p.m., Wayne S via cctalk wrote: >> P.S. >> mylar/plastic was used for read many tapes. That is a tape that is goi

[cctalk] Re: Is there a more modern replacement for paper tape punch/reader

Interesting. All the ones i used, including some teletypes, needed pre-punched tape, ostensibly to ensure proper alignment. We used to buy pallets of prepunched tape. Sent from my iPhone > On Jun 24, 2025, at 12:10, Tony Duell wrote: > > On Tue, Jun 24, 2025 at 8:04 PM Wayne S v

[cctalk] Re: Is there a more modern replacement for paper tape punch/reader

P.S. mylar/plastic was used for read many tapes. That is a tape that is going to be red many times and usually holds some critical program. The center sprocket really could eat up paper tapes. That’s why some material with durability was needed. Sent from my iPhone > On Jun 24, 2025, at 11:41

[cctalk] Re: Is there a more modern replacement for paper tape punch/reader

Probably could use film stock. Issues are it’s not too flexable, might break after a read so it would be hard to handle, its hard, and would dull the punch pins quickly, and film is expensive. Before CTP, we shot pasted-up pages with a big camera, and used that developed film to make plates. The

[cctalk] Re: Is there a more modern replacement for paper tape punch/reader

Laser would catch the mylar on fire or melt it at least, i’m thinking. Sent from my iPhone > On Jun 22, 2025, at 14:09, Anders Nelson via cctalk > wrote: > > I would love to see someone create a galvo-laser system for punching > paper/mylar tape. On Aliexpress you can get a galvo set for (a

[cctalk] Re: Is there a more modern replacement for paper tape punch/reader

I like how he made the paper. Sent from my iPhone > On Jun 22, 2025, at 19:19, ste...@malikoff.com steven--- via cctalk > wrote: > >  >>> On 06/23/2025 10:23 AM AEST ben via cctalk wrote: >> >> Https://unimplementedtrap.com/paper-tape-punch > > Wow, that is seriously impressive! > It wasn'

[cctalk] Re: Is there a more modern replacement for paper tape punch/reader

There’s really a disconnect on between reading and punching paper tape. For making blank tape that can be used in a punch, you can cut a roll of something down to a proper width, but the paper has to be thicker than cashiers paper. The real trick is that the paper has to be perforated in the mi

[cctalk] Re: Bill Atkinson

Very nice article! Sent from my iPhone > On Jun 13, 2025, at 09:39, Liam Proven via cctalk > wrote: > > On Tue, 10 Jun 2025 at 00:44, Murray McCullough via cctalk > wrote: >> >> drawing on a computer screen > > That is such a vague way of putting it that I'm not surprised people objected!

[cctalk] Re: Is there a more modern replacement for paper tape punch/reader

025-06-21 1:18 p.m., Wayne S via cctalk wrote: >> Actual oiled paper tape that meets specs is difficult to make. >> You need a thick stock and the tape is impregnated with oil to lubricate the >> punch mechanism. >> The actual specs for it is available on Bitsavers. >

[cctalk] Re: Is there a more modern replacement for paper tape punch/reader

Actual oiled paper tape that meets specs is difficult to make. You need a thick stock and the tape is impregnated with oil to lubricate the punch mechanism. The actual specs for it is available on Bitsavers. That said, old, unused paper tape seems to becoming more available on ebay as people di

[cctalk] Re: DEC items: update

Paul, FYI, I don’t know if you monitor all your rmail, but i sent you some invites to some classic computer discords where people will really want your boards to complete their systems. Wayne Sent from my iPhone > On Jun 29, 2025, at 11:04, Paul Koning via cctalk > wrote: > >  > >> On Jun

[cctalk] Re: Another 780 backplane story

from my iPhone > On Jul 4, 2025, at 14:21, Wayne S wrote: > > I didn’t see chalk, but it was $1600/hr plus expenses to know where to sweep. > IBM was paying it! > > Sent from my iPhone > >>> On Jul 4, 2025, at 13:44, Fred Cisin via cctalk >>> wrote: &g

[cctalk] Re: VAX 86x0 schematics

That’s a good business practice anyway. You want your high price system up and running as fast as possible, so not having to do more than cursory diagnostics is a good thing I think deck realize that with the VAX and it’s remote the diagnostic capability as for the board breaks, IBM used to do t

[cctalk] Re: VAX 86x0 schematics

, 2025, at 2:26 PM, Wayne S via cctalk wrote: >> >> That’s a good business practice anyway. You want your high price system up >> and running as fast as possible, so not having to do more than cursory >> diagnostics is a good thing I think deck realize that with

[cctalk] Re: VAX 86x0 schematics

Same here. The FE came prepared with a replacement board. Never repaired the board. In and out! Sent from my iPhone > On Jul 2, 2025, at 17:55, Jon Elson via cctalk wrote: > > On 7/2/25 11:25, Paul Koning via cctalk wrote: >> On Jul 2, 2025, at 11:13 AM, Jon Elson via cctalk wro

[cctalk] Re: VAX 86x0 schematics

We had some Fujitsu Eagles with that exact same problem. Go figure. Sent from my iPhone > On Jul 3, 2025, at 13:39, Nigel Johnson Ham via cctalk > wrote: > > On 2025-07-03 16:12, Wayne S via cctalk wrote: >> Yes, stats are kept about issues. >> Someone should look a

[cctalk] Re: Another 780 backplane story

I didn’t see chalk, but it was $1600/hr plus expenses to know where to sweep. IBM was paying it! Sent from my iPhone > On Jul 4, 2025, at 13:44, Fred Cisin via cctalk wrote: > > On Fri, 4 Jul 2025, Wayne S via cctalk wrote: >> This is similar to an IBM mainframe story i h

[cctalk] Re: Another 780 backplane story

This is similar to an IBM mainframe story i have. IBM 370 wouldn’t IMPL. CE and FE couldn’t figure it out. They called in a “Special Consultant.” I Came in with a briefcase that contained his “tools”, which was a big brush that you would use for light plaster work and a wood mallet. He proceeded

[cctalk] Re: Another 780 backplane story

Yeah, this was 1978. What we used to spend on IT stuff back then is really amazing. So much! Sent from my iPhone > On Jul 4, 2025, at 15:04, Fred Cisin via cctalk wrote: > >  >> Came in with a briefcase that contained his “tools”, which was a big brush that you would use for light

[cctalk] Re: Is there a more modern replacement for paper tape punch/reader

My only recollection of the prepunched sprocket hole tapes was that we ( large newspaper) got the tapes in a box of 12 reels. The reels were joined together, so the end of one reel was joined to the start of the next reel. I do remember seeing boxes lying at the base of Linotype machines. I thin

[cctalk] Re: SyQuest disk anyone?

Easier to get the serial zip drive to work. There’s still carts available for those. Sent from my iPhone > On Jul 20, 2025, at 13:15, Peter Ekstrom via cctalk > wrote: > > I did find that out a little while ago. But the disks do seem as rare as > hen's teeth for sure! > I came across an SQ31

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