Re: IBM Logic IC equivalency information needed

2021-06-12 Thread Christian Corti via cctalk
On Sat, 12 Jun 2021, Tony Duell wrote: I wonder if in the original list, a '1' was misread as a '7' or vice versa. I am told that in some countries the '7' is conventionally written with a crossbar across the downstroke to avoid this. My father always did this, for all it is not common in

Re: VT340 Emulation

2021-06-23 Thread Christian Corti via cctalk
On Mon, 21 Jun 2021, Ethan Dicks wrote: I would love some sample ReGIS files, color or B Anything, really. You can use GNUplot with the terminal type set to ReGIS. Christian

Re: Melted computer feet

2021-05-20 Thread Christian Corti via cctalk
On Thu, 20 May 2021, David Collins wrote: Orange based cleaners are also good - the ones that remove stickers etc That will dissolve plastics! Don't use orange based cleaners. I just use normal 97% ethanol (called Spiritus here). That will work just fine. Christian

Re: DEC PDP-11/45 backplane +5 ECO

2021-04-29 Thread Christian Corti via cctalk
On Wed, 28 Apr 2021, Fritz Mueller wrote: On Apr 28, 2021, at 9:51 AM, Al Kossow via cctalk wrote: I have other 45/70 drawings that i haven't pdf'ed I need to see if they are different revs than what I already have Ohh... I'd be very, *very* interested to see versions of the /45 drawings

Re: punching paper tape

2021-03-27 Thread Christian Corti via cctalk
On Fri, 26 Mar 2021, Paul Koning wrote: Some machines used 7-track paper tape that is narrower than 8 track tape. I thought Whirlwind was one of those. Yes, the LGP-30 uses 7-tack paper tape as well. Normal 8 track paper tape is 25.4mm, 7 track tape 22.2mm. The latter is absolutely

Re: Hard To Believe This Person Is Serious

2021-03-26 Thread Christian Corti via cctalk
On Fri, 26 Mar 2021, Guy Dunphy wrote: 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. The better questions are: Why is the price marked in GBP and why doesn't he ship

Re: Need to have a roll of paper punch tape read by a tape reader and printed

2021-03-09 Thread Christian Corti via cctalk
On Tue, 9 Mar 2021, Vincent Slyngstad wrote: I am a cctalk subscriber, but I don't seem to be getting messages reliably any more. So, I'm replying to the reply, as I never got the original query. Interesting, I did not get the original message either... Christian

Need a BASIC expert

2021-04-21 Thread Christian Corti via cctalk
Hi, I'm trying to find out if the BASIC dialect that was available for the MINCAL computers (aboutn 1971) was something derived from another "system" or whether it was an own dialect. Some characteristic instructions that I can't find somewhere else are: - Formatted output with PRINT FOR()

Re: Systems Concepts SC-4 computer

2021-02-16 Thread Christian Corti via cctalk
On Mon, 15 Feb 2021, Eric Moore wrote: Yes, SEL was referred to as systems, but like I said that PDF does not seem I still have problems seeing SEL referred to as something different as "Standard Elektrik Lorenz" (later part of ITT) who made for example the ER56... Christian

Re: TI 960

2021-02-22 Thread Christian Corti via cctalk
On Sun, 21 Feb 2021, Al Kossow wrote: Not very often you see paper tape software for them Unfortunately I haven't found *any* software for the 960, yet. Christian

Re: One more thing to fix... HP9000/380 power supply

2021-02-12 Thread Christian Corti via cctalk
On Thu, 11 Feb 2021, carlos_muri...@ieee.org wrote: to diminish it. Argh.  A month ago my trusty HP9000/380 ran just fine and I [...] on; the power supply is dead.  So I unracked the pile of drives and the computer, checked for obvious things (the fuse is fine, and nothing in the power supply

Re: Need a BASIC expert

2021-04-21 Thread Christian Corti via cctalk
On Wed, 21 Apr 2021, it was written If there are FORTRAN-esque commands added to the core Dartmouth version I would search for another instance prior to MINICAL where this was done. Back then BASIC flavors and adaptations were becomming common so it may simply be MINICAL BASIC would have been

Re: Need a BASIC expert

2021-04-22 Thread Christian Corti via cctalk
On Wed, 21 Apr 2021, Brent Hilpert wrote: It's not clear what you're looking for: 1. A possible predecessor/origin for the source code or design of the MINCAL interpreter, 2. or, earlier BASIC implementations that had the language features you mention. Well, both with the focus on 1. I'm

Re: ISO intel iPDS-100 w/8085 pod (UK)

2021-04-23 Thread Christian Corti via cctalk
On Fri, 23 Apr 2021, Adrian Graham wrote: I just got pipped on an auction for one of these last night, clearly someone needed it more than me and I hope it was for a real usage reason and not just to add to their collection of MDS-related machines. I?ve been looking for an 8085 ICE for ages

Re: Scanning Suggestions (Bookmarks & Colour)

2021-08-30 Thread Christian Corti via cctalk
On Fri, 27 Aug 2021, Al Kossow wrote: I didn't see an obvious example of ocrmypdf doing OCR in parallel on a single document It does that by default. At least, it always uses all cores when I process a document with ocrmypdf. Christian

Re: PC floppy disk sets avaialble free

2021-08-10 Thread Christian Corti via cctalk
On Mon, 9 Aug 2021, Al Kossow wrote: Whatever happened to PRIVATE replies. It isn't even that hard to do, you just have to copy their source adr from the message, since this list's default reply is to the whole fsckin' list That's why I have a procmail rule that fixes that:

Re: Unix or BSD for Dec PDP 11/34 and 11/45

2021-09-22 Thread Christian Corti via cctalk
On Fri, 17 Sep 2021, devin davison wrote: I'm working to get my pdp 11/34 and 11/45 running. I was curious what versions of unix or bsd would work on the machines i have. I wanted to set I'm running 2.9BSD on both our 11/34 and 11/45. If possible too, id like to be able to telnet in to unix

Re: scanning a ton of documentation

2021-09-22 Thread Christian Corti via cctalk
On Wed, 22 Sep 2021, Jay Jaeger wrote: B/W, CCITT Group 4 tiffs at 400dpi is what I do, but then I also 600 DPI should be the absolute mininum today. There is absolutely no reason to go below that for B/W. and notify Al Kossow of an available contribution. Hasn't worked for me in the

Re: scanning a ton of documentation

2021-09-24 Thread Christian Corti via cctalk
On Wed, 22 Sep 2021, Al Kossow wrote: On 9/22/21 1:51 PM, Christian Corti via cctalk wrote: Hasn't worked for me in the past ... guess I picked a bad day to stop sniffing glue Don't get me wrong, but I had written some emails in the last years offering stuff for bitsavers (downloadable from

Re: scanning a ton of documentation

2021-09-24 Thread Christian Corti via cctalk
On Wed, 22 Sep 2021, Al Kossow wrote: Bitsavers will post process and create a searchable PDF Since when? I think I'll just step away from the terminal for a few hours. I've been OCRing uploads for YEARS. Ok, I didn't know that you do that for foreign scans, I thought you only OCR your

Re: OT: Traveling to Zurich in February

2021-12-17 Thread Christian Corti via cctalk
On Fri, 17 Dec 2021, Bill Degnan wrote: a partnership to found or make commercial a health resort called "Bad Krautzma", but I believe she was way off spelling-wise. It's written in "Bad Kreuznach" comes to my mind, no idea if this could be the place, though. Christian

Re: TU56 DECtape takeup reel needed

2021-12-21 Thread Christian Corti via cctalk
On Fri, 17 Dec 2021, Paul Koning wrote: Interesting idea. A while ago someone posted a picture of what looks like a "go/no-go" gauge for DECtape reels. It is marked with the dimensions of the two sides: 2.504-2.505 inches for the "no-go" end, 2.494-2.495 for the "go" end. So that tells us

Re: Intel 4004 turns 50

2021-11-17 Thread Christian Corti via cctalk
On Tue, 16 Nov 2021, ED SHARPE wrote: The two contenders on tside leading g to the gold caphis question are white and Gold 4004. And. The white  and gold with leads showing through in the white material i And now in English, please! Christian

Re: IEEE-488 on the PDP-11

2021-11-19 Thread Christian Corti via cctalk
On Thu, 18 Nov 2021, it was written On Thu, Nov 18, 2021 at 3:15 AM Christian Corti via cctalk Our Tektronix 4051 can talk to and use Commodore IEEE floppy drives for mass storage. It has a custom ROM extension for it. That's really cool. There are a few non-Commodore systems that were able

K12MIT on PDP-12

2021-11-24 Thread Christian Corti via cctalk
So, with the help of you here, I was able to create OS/8 LINCtapes and to run SerialDisk. Everything runs very fine. Now comes the next thing: I want to have K12MIT, and it is no problem to compile or load the program. *But*: When I start K12MIT I don't get the prompt. I see the welcome

Re: K12MIT on PDP-12

2021-11-24 Thread Christian Corti via cctalk
On Wed, 24 Nov 2021, Chris Zach wrote: Do you have a running pdp12? Yes :-) It is completely working including the display and both LINCtape drives. Christian

Re: K12MIT on PDP-12

2021-11-26 Thread Christian Corti via cctalk
On Thu, 25 Nov 2021, Christian Corti wrote: Just tried without SerialDisk... no difference. K12MIT is broken on the PDP-12. I've found the bug. Charles Lasner broke PDP-12 support (and probably also older PDP-8 models like 8/I) with his additions to support the DECmate family. The location

Re: K12MIT on PDP-12

2021-11-25 Thread Christian Corti via cctalk
On Wed, 24 Nov 2021, Vincent Slyngstad wrote: Are you running SerialDisk on the same DP12 that K12MIT is trying to use? That might not work well, though I'm not sure why K12MIT would commit suicide about it. Hmm... good point, I think that I have tried both, from LINCtape and from

Re: IEEE-488 on the PDP-11

2021-11-18 Thread Christian Corti via cctalk
On Wed, 17 Nov 2021, Ethan Dicks wrote: On Tue, Nov 16, 2021 at 6:09 PM Christian Gauger-Cosgrove I kind of want to see now if an IBV11 and Commodore 1541 can be abused into cooperating. I think it could be done. The IBV11 can certainly keep up with the 6502 in the drive that's banging out

Re: K12MIT on PDP-12

2021-11-25 Thread Christian Corti via cctalk
On Thu, 25 Nov 2021, Christian Corti wrote: On Wed, 24 Nov 2021, Vincent Slyngstad wrote: Are you running SerialDisk on the same DP12 that K12MIT is trying to use? Hmm... good point, I think that I have tried both, from LINCtape and from SerialDisk. I know, the latter won't work, but at least

SerialDisk (Re: LINCtape images)

2021-11-02 Thread Christian Corti via cctalk
On Fri, 29 Oct 2021, Vincent Slyngstad wrote: There seem to be a couple of formats that were frequently used, and a third lesser used format. One of the issues is that you have to go into maintenance mode, as far as I can tell, to determine the size of the block you just read into memory.

Re: SerialDisk (Re: LINCtape images)

2021-11-02 Thread Christian Corti via cctalk
On Tue, 2 Nov 2021, Vincent Slyngstad wrote: Another option would be to spin the data onto LINCtape with a TD8E, then mount the result on the PDP-12. I think Dave is creating the images in the first place with either a TD8E, or possibly a custom controller. I think he used a custom

LINCtape images

2021-10-29 Thread Christian Corti via cctalk
Short question: How do I transfer LINCtape images back to tape on a PDP-12? Ideally there is some binary program to load via papertape to format a tape and recreate it with data transfer over the console serial line. Christian

Re: LINCtape images

2021-11-05 Thread Christian Corti via cctalk
On Thu, 4 Nov 2021, David Gesswein wrote: On Wed, Nov 03, 2021 at 10:57:21AM -0500, Jay Jaeger wrote: I have some LINCTape images with diagnostics. Let me know if you need one and I can send you the image. I can add them to my browsble archive if you wish.

Re: LINCtape images

2021-11-03 Thread Christian Corti via cctalk
On Wed, 3 Nov 2021, Jay Jaeger wrote: It seems you didn't notice that I included two separate programs in my previous post: XMTAPE and CMPTAP ;) I did, and I have found an error ;-) 0275 0361 7300 #WDFLSH CLA CLL 0276 0362 1073 0073 TAD XMCNT [ IF COUNT==128. 0277 0363

Re: LINCtape images

2021-11-03 Thread Christian Corti via cctalk
On Tue, 2 Nov 2021, Jay Jaeger wrote: Here is a program I wrote for reading/writing tape images via XModem protocol for my PDP-12, and another for comparing two linctapes. This is fantastic, thanks :-) I hope this will help us in bootstrapping the PDP-12. At least I would like to have a tape

Re: LINCtape images

2021-11-08 Thread Christian Corti via cctalk
On Fri, 5 Nov 2021, David Gesswein wrote: Looks like your .BN isn't my sites BIN loader conversion. Did you try mine and it didn't work or you had already done your own before I added it? I made my own extraction from the image, but it is the same as yours. I had written my own little program

Re: Siemens T100 Terminal with Paper Tape - Available

2021-12-10 Thread Christian Corti via cctalk
On Thu, 9 Dec 2021, nico de jong wrote: You need a COM port (or simulator) and a little box converting RS232 to 50 BPS serial.  Diagrams can be found everywhere. But you could also look at There isn't such a converter thing ;-) What you mean is a converter between current loop and V.28. To be

Re: Siemens T100 Terminal with Paper Tape - Available

2021-12-09 Thread Christian Corti via cctalk
On Wed, 8 Dec 2021, Monty McGraw wrote: I have this terminal in my garage - sitting on its custom stand. That's a plain standard current loop telex machine using CCITT2 code. The more modern electronic version of it is the T1000 (that was available as 5-bit CCITT2 and 8-bit ASCII).

Re: Install Floppies (Was: Compaq Deskpro boards/hard drives from

2021-07-26 Thread Christian Corti via cctalk
On Mon, 26 Jul 2021, Peter Corlett wrote: When writing, PC-style disk controllers scan for the appropriate sector header then switch to write mode to overwrite the old sector data. This requires guard bands between sectors and sector headers. The PC's This is not called a guard band. A guard

Re: Source for replacement caps in H744 regulators

2022-01-06 Thread Christian Corti via cctalk
On Thu, 6 Jan 2022, r...@jarratt.me.uk wrote: If I can't find 10V rated ones, then, generally up to what sort of voltage rating can I go? Of course, physical size will be a factor, but electrically can it affect operation of the regulator if the rated voltage is too high? If you need to ask

RE: Found! Ge 115 computer brochure

2022-03-16 Thread Christian Corti via cctalk
On Tue, 15 Mar 2022, Fred Cisin wrote: He had a 2.5M attachment of a photograph of the 28 printing it Since the list doesn't allow attachments, no, there was no photograph on this list. Christian

RE: Found! Ge 115 computer brochure

2022-03-15 Thread Christian Corti via cctalk
On Sun, 13 Mar 2022, W2HX wrote: Here is some Baudot Art. Hot off the model 28 Where is "here"? Christian

Re: IBM 5110 (5100) schematics ?

2022-03-18 Thread Christian Corti via cctalk
On Thu, 17 Mar 2022, Brent Hilpert wrote: Does anyone have or know whether the schematics for the IBM 5110 or 5100 are available? No, there are no schematics, only block diagrams. I had created the schematics for the Async/Serial I/O card years ago (it's a TTL only board) And the tightly

Re: ID UV erasable PROMS used on an IBM PC board?

2022-03-23 Thread Christian Corti via cctalk
On Wed, 23 Mar 2022, Chris Elmquist wrote: More interesting. If the programming algorithms remained the same then I guess it is just an issue for the programming system-- when it auto-IDs, it should display (and allow!) 27C256A instead of 27C256. I guess the next question is whether the

Re: Core memory

2022-04-03 Thread Christian Corti via cctalk
On Fri, 1 Apr 2022, Paul Koning wrote: On Apr 1, 2022, at 2:38 PM, Brent Hilpert via cctalk wrote: Well, it would still work for 1-bit-wide words, so to speak. One wonders what the application was. I wonder if the sense wire was used as inhibit during write cycles -- that seems doable. It

Re: WARNING: Clear QIC Tape Bands

2022-01-21 Thread Christian Corti via cctalk
On Thu, 20 Jan 2022, it was written On Jan 20, 2022, at 00:23, Christian Corti via cctech wrote: What bands did you use/buy? I ask because the Baumgartens Plastibands aren't available in the required size (as if they are not produced any more). I bought the assorted sizes pack (SF-7000, I

Re: WARNING: Clear QIC Tape Bands

2022-01-22 Thread Christian Corti via cctalk
On Fri, 21 Jan 2022, it was written Have you tried Misumi? The only problem I had was that you have to be VAT registered. I had a friend order for me. Yes, and that is exactly the problem. Christian

Re: WARNING: Clear QIC Tape Bands

2022-01-20 Thread Christian Corti via cctalk
On Wed, 19 Jan 2022, Jonathan Chapman wrote: Just as a follow-up, I retensioned and read both tapes with clear bands this morning, and they're fine. Since they were parked, there shouldn't have been anything important there, and it looks like the removed oxide is staying on the band. What

[cctalk] Re: TI 960

2023-09-06 Thread Christian Corti via cctalk
On Tue, 5 Sep 2023, Tom Ivar Helbekkmo wrote: James B DiGriz via cctalk writes: Oh, I've always been interested in them, just that opportunity and means never converged when I wasn't distracted by other things, and then they became yesterday's news and hard to find. If yours turn up, I'm sure

[cctalk] Re: TI 960

2023-09-01 Thread Christian Corti via cctalk
On Sun, 27 Aug 2023, Mark Linimon wrote: The 960B is the only computer I ever walked away from and said "I can't do this". This was mostly, but not entirely, due to the Silent 700 and its cassette tapes. It took 20 minutes to load the loader, and, then, if I got that right, 20 minutes to

[cctalk] Re: Silly question about S-100 and video monitors

2023-09-01 Thread Christian Corti via cctalk
On Thu, 31 Aug 2023, Mike Katz wrote: Composite will 99.99% of the time be better than RF modulated due to the bandwidth of NTSC (American) Televisions.  The NTSC television standard was not what I would exactly call high tech or high resolution.  It was 525 scan lines interlaced at 30Hz

[cctalk] Re: TI 960

2023-09-04 Thread Christian Corti via cctalk
I won't give up my hopes, but it seems that this system is practically extinct and that noone is really interested in it, although it was the start for the later 980/990 and 9900 series. Christian

[cctalk] Re: Friden (was Silly question about S-100 and video monitors)

2023-09-02 Thread Christian Corti via cctalk
On Fri, 1 Sep 2023, Rick Bensene wrote: The machine was able to be implemented with so few transistors because the microcode word was quite wide, and was designed so that it was sequentially interpreted as the bits streamed out of the delay line, so not all that many flip flops were needed.

[cctalk] Re: Silly question about S-100 and video monitors

2023-09-02 Thread Christian Corti via cctalk
On Fri, 1 Sep 2023, wrco...@wrcooke.net wrote: My favorite is Votrax (speech synthesizers) being a division of Federal Screw Works. We have one attached to our lab8/e :-) Christian

[cctalk] Re: IBM 727 tape drive

2023-10-13 Thread Christian Corti via cctalk
On Wed, 20 Sep 2023, Van Snyder wrote: I wonder if Susan Vigor has 727s with her 7094? Probably not. That would be 729 drives (the transistorized successor of the 727). We now have the 727 here (a 727 model III, built in 1957). It is complete and in a very good shape. It only needs some

[cctalk] Re: IBM 5100 discussion

2023-10-17 Thread Christian Corti via cctalk
On Mon, 16 Oct 2023, jim stephens wrote: On 10/16/23 04:14, Steve Lewis via cctalk wrote: I'm here (voidstar) ? I think at the time I wasn't aware of cctalk, or it wasn't working for me at the time. The fellow who did this got into a lot of trouble, as they also did the XT/370 and PC/370, and

[cctalk] Re: Looking for NORTRONICS Read/Write head for IBM 5100/5110/5106 tape unit

2023-10-26 Thread Christian Corti via cctalk
On Wed, 25 Oct 2023, Mark Perullo wrote: halves". One half looks like an "upper and lower" for the two tracks, then next to that is a "vertical bar." I've never quite understood what that vertical bar is - I assume a WRITE portion of some sort?? The ones in the ebay listing don't have

[cctalk] Re: IBM 727 tape drive

2023-09-20 Thread Christian Corti via cctalk
On Mon, 18 Sep 2023, Len Shustek wrote: Just a few weeks ago I donated to the Computer History Museum a set of 14 original IBM black binders of "Type 7xx" manuals from the 1950s, including the 727. That one is likely to be the same as what's on bitsavers, but since it's no longer in hand I

[cctalk] IBM 727 tape drive

2023-09-18 Thread Christian Corti via cctalk
Hello all, as it will be soon of importance to us, I am seeking for the systems engineering manual and drawings, well, everything about the IBM 727 tape drive (not the 729!). I especially need the module locations charts and the module schematics. I see that there is the CE manual on

[cctalk] Re: M7846 RX11 Unibus floppy controller board documentation?

2023-10-18 Thread Christian Corti via cctalk
On Wed, 18 Oct 2023, Tom Hunter wrote: I was unable to locate schematics and/or a maintenance manual for the Unibus M7846 RX11 floppy controller board. On our FTP server ;-) ftp://computermuseum.informatik.uni-stuttgart.de/dec/pdp11/RX11_EngineeringDrawings_13Jun1975.pdf Christian

[cctalk] IBM 5100 discussion

2023-10-16 Thread Christian Corti via cctalk
I have been pointed to the following discussion https://forum.vcfed.org/index.php?threads/ibm-5110-initial-info.1224000/page-2 There, voidstar78 was apparently trying to contact me. Since my mail addresses are all functional (noone else had any problem with them, be it my personal or our

[cctalk] TI 960

2023-08-26 Thread Christian Corti via cctalk
I guess not many have survived but I want to ask if someone/some place has software (papertapes, ...) for the Texas Instruments 960 minicomputers. We have a 960B but at the moment, it is pretty much useless. I could toggle in a small program, but would appreciate something like FORTRAN or an

Re: Selling my 026/029 IBM punch card control drum ($150)

2022-04-22 Thread Christian Corti via cctalk
On Thu, 21 Apr 2022, Barry Hills wrote: Selling my 026/029 IBM punch card control drum ($150) Thanks, I had a good lough :-D Christian

Re: PCI floppy controller

2022-04-23 Thread Christian Corti via cctalk
On Fri, 22 Apr 2022, "Maciej W. Rozycki" wrote: You can of course build a PCI FDD interface around the NEC uPD765 or an equivalent controller, but you can't make it compatible with existing PC software, because too much PC specifics has been embedded there around the 8237 DMA controller and DMA

Re: DEC H7822 power supply

2022-05-13 Thread Christian Corti via cctalk
On Thu, 12 May 2022, Peter Coghlan wrote: Can we agree that there is such a thing as an "AC current" and there is such a thing as a "DC current" and the two of them can be added together? Ouch... an alternating current current and direct current current ;-) And you usually add the voltages,

Re: DEC H7822 power supply

2022-05-13 Thread Christian Corti via cctalk
On Thu, 12 May 2022, Toby Thain wrote: I also hate the English/American expression "inverter" for voltage converters, because really nothing is being inverted in any way. Generating AC from DC _does_ always involve generation of "inverted" voltages relative to the input DC (AC has positive and

Re: DEC H7822 power supply

2022-05-13 Thread Christian Corti via cctalk
On Thu, 12 May 2022, Toby Thain wrote: It does not, due to unidirectionality. But in general, diodes can be (and are) used as controlled AC switches. One good example are the head select diodes in disk drives. You apply a direct voltage and thus "open" the diode. You then have a overlayed

Re: DEC H7822 power supply

2022-05-12 Thread Christian Corti via cctalk
On Thu, 12 May 2022, Peter Coghlan wrote: about it? Maybe it would be more accurate to use terms like steady voltage and alternating voltage? Alternating doesn't seem like that good a term In German it's exactly like you suggest it. We say "Gleichspannung" (= constant/steady voltage) and

Re: Xerox 800 Word Processor 1974 promo film

2022-07-10 Thread Christian Corti via cctalk
On Sat, 2 Jul 2022, Grant Taylor wrote: I don't know that I've ever heard / seen the name "Rank" prefixing "Xerox" before. Actually I knew them only as Rank Xerox many years ago, when they were commonly known as office suppliers, e.g. photo copiers and printers. Christian

Re: Rubber bands for a TU58

2022-04-28 Thread Christian Corti via cctalk
On Thu, 28 Apr 2022, Chris Zach wrote: Quick question: I have seen references to new rubber bands for the DC600 series of carts, but is there a similar replacement part for TU58 tapes? Yes, but forget Baumgartens' Plastibands, they are practically unavailable. I got some hundred of each size

Re: DEC H7822 power supply

2022-05-11 Thread Christian Corti via cctalk
On Tue, 10 May 2022, Peter Coghlan wrote: Ahead of the 78M09 is another TO220 package marked D45H8 which seems to be a transistor. Then I am completely lost. I can't find the rectifier That TO220 part would be the rectifier. It either has two legs (simple diode) or three (two-wave rectifier

[cctalk] Re: You have Apple Lisa 1 "twiggy" system to trade for my IBM 5100 Portable PC?

2022-09-05 Thread Christian Corti via cctalk
buy for 31000. ^ On Mon, 5 Sep 2022, Christian Corti via cctalk wrote: Are you sure about that? The 5100 doesn't support floppy drives. And I've never heard of third-party drives (that would need IMFs, too) for the 5100

[cctalk] Re: You have Apple Lisa 1 "twiggy" system to trade for my IBM 5100 Portable PC?

2022-09-06 Thread Christian Corti via cctalk
On Mon, 5 Sep 2022, Tom Stepleton wrote: Or at least there as something that was sold in this way. Here is its brochure: http://www.bitsavers.org/pdf/sykes/brochures/Sykes_Comm-Stor_5100_Brochure.pdf Interesting! (What is an IMF?) IMF = internal machine fix The 5100/5110 had a mechanism

[cctalk] Re: You have Apple Lisa 1 "twiggy" system to trade for my IBM 5100 Portable PC?

2022-09-06 Thread Christian Corti via cctalk
On Mon, 5 Sep 2022, jim stephens wrote: The unit I have is IBM. There was no floppy drive unit from IBM for the IBM 5100. Or do you have a model number? It only did single sided diskettes, low density.  It's the only device which The IBM 5114 handles single and double sided diskettes, as

[cctalk] Re: You have Apple Lisa 1 "twiggy" system to trade for my IBM 5100 Portable PC?

2022-09-06 Thread Christian Corti via cctalk
On Mon, 5 Sep 2022, jim stephens wrote: the 5100 has an external connector.  The floppy drive is a floor unit about Yes, three Sub-D connectors. Two for the signals, one for power. the size of three AT units upright, with two single density floppies in it.  And that floppy drive (if you

[cctalk] Re: PALM assembler now available (5100/5110/5120)

2022-10-25 Thread Christian Corti via cctalk
On Mon, 24 Oct 2022, Steve Lewis wrote: Wanted to pass along that PALM has been added as a target to the Macro Assembler AS. This means writing some assembly stuff for the old IBM 5100/5110/5120 systems. Assembler available here: http://john.ccac.rwth-aachen.de:8000/as/ Funny, as this is the

[cctalk] Re: PALM assembler now available (5100/5110/5120)

2022-10-26 Thread Christian Corti via cctalk
On Tue, 25 Oct 2022, Steve Lewis wrote: Christian! I tried contacting you a few months ago. Apologies, I suspect some intermediate ISP may be blocking gmail? I've seen this happen with other contacts. Oh my, yes I have some mail chaos on my system and I guess yours must have been "lost"

[cctalk] Re: PALM assembler now available (5100/5110/5120)

2022-10-27 Thread Christian Corti via cctalk
On Thu, 27 Oct 2022, Steve Lewis wrote: Hehe, this sounds like a great idea! Did I send you my Kermit implementation or my Infocom V2 interpreter? Nope - would love to check them out, any PALM examples. Your annotated Ok, can you remind me next week perhaps? disassemble of the Executive

[cctalk] Re: Bendix G-15 Restoration

2022-10-10 Thread Christian Corti via cctalk
On Fri, 7 Oct 2022, Chuck Guzis wrote: I recall that the IBM 650 had an upgrade option where core was used for some of the registers. It was small--maybe 50 words. The Z22 had a very small area of core memory, called "fast memory" (Schnellspeicher). And then we have boards out of an LGP-21

[cctalk] Re: Bendix G-15 Restoration

2022-10-10 Thread Christian Corti via cctalk
On Sat, 8 Oct 2022, Paul Kimpel wrote: modify a lot of the software. Timing dependencies aside, G-15 instructions didn't have addresses -- they had "timing numbers" that effectively told the hardware how long to wait before reading or writing a word on the drum. Oh really, that is then

[cctalk] Re: Flipping an 8" diskette

2022-09-05 Thread Christian Corti via cctalk
On Thu, 1 Sep 2022, jim stephens wrote: I've never heard of anyone making 8" Flippy Diskettes. BASF had the FlexyDisk 2N. They are intented for single-sided drives and can be flipped. They have two index hole cutouts. Christian

[cctalk] Re: You have Apple Lisa 1 "twiggy" system to trade for my IBM 5100 Portable PC?

2022-09-05 Thread Christian Corti via cctalk
On Sun, 4 Sep 2022, jim stephens wrote: On 9/3/22 17:38, Fred Cisin via cctalk wrote: Well, it ain't in the 5150/5160 range! The 5100 new was $10K to $20K. I had a 5100 that a dentist had bought as soon as it  came out and he added the floppy drives and printer.  It was a direct IBM buy for

[cctalk] Re: Connecting a physical terminal via LAN to Serial Port

2022-08-01 Thread Christian Corti via cctalk
On Sun, 31 Jul 2022, Fritz Mueller wrote: +1 for the Digi Portserver for this application. I recently grabbed one off eBay, because I have a number of vintage terminals here which I would like to ?crossbar? to a number of vintage computers with serial terminal support, and also provide both

[cctalk] Re: Connecting a physical terminal via LAN to Serial Port

2022-08-01 Thread Christian Corti via cctalk
On Sat, 30 Jul 2022, Ali wrote: modern system using an IP:port schema. This works great except I don't get to play with my shiny, new to me, authentic experience terminal device. Why not? You attach the terminal to your terminal server, too, and connect from the terminal to one of the other

[cctalk] Re: 14 DZ11's for sale/whatever

2022-11-02 Thread Christian Corti via cctalk
On Tue, 1 Nov 2022, Ethan Dicks wrote: The big benefit for DH11 and DMF32 and 3rd-party DH11 work-alikes (Emulex CS-21...) is that since under normal workflow, many times more chars go out than come in so DMA-out saves a lot of overhead when blasting screens of stuff (like refreshing your page

[cctalk] Re: How to print old files.

2023-01-01 Thread Christian Corti via cctalk
On Sat, 31 Dec 2022, ben wrote: How do you print old files in ASCII 63 to modern devices, so you keep the ? and ? 's and not printing _ and ^ ? I'm scratching my head... you want to keep the question marks? But I guess you mean the back arrow and the up arrow. Christian

[cctalk] Re: Altos 486 (was: Altos 386 series 1000 installation disks & tape)

2023-01-03 Thread Christian Corti via cctalk
On Mon, 2 Jan 2023, BogDan Vatra wrote: According to https://techmonitor.ai/technology/altos_claims_tripled_performance_for_its_new_486_1000_unix_machine the 486 should work with SCO as well. This means you're lucky as you can find it on the net (e.g. archive.org or

[cctalk] Altos 486 (was: Altos 386 series 1000 installation disks & tape)

2023-01-02 Thread Christian Corti via cctalk
On Sun, 1 Jan 2023, BogDan Vatra wrote: Earlier this December I got an Altos 386 series 1000 with lots of documentation and some installation floppy disks and one tape. I must say that it's an amazing machine! I'd like to reinstall the os but I have two problems: I have an Altos 486 System

[cctalk] Re: Replacing NiCd with NiMH in a pro way.

2022-12-23 Thread Christian Corti via cctalk
On Fri, 23 Dec 2022, gordon+cct...@drogon.net wrote: dumb charger. Might be worth a watch, but the tl;dr seems to be that trickle ^ The what ??? Christian

[cctalk] Re: Pertec controller; was: anybody need 1/2" tape drives?

2022-11-30 Thread Christian Corti via cctalk
On Sun, 27 Nov 2022, Chuck Guzis wrote: If anyone cares, I've been working on a Pertec tape controller design. The initial version worked remarkably well with only a few bodge wires. I'm assembling the respin of the design and do not anticipate any issues. I could really use some "Unformatted

[cctalk] Re: Computer Museum uses GreaseWeazle to help exonerate Maryland Man

2023-01-20 Thread Christian Corti via cctalk
On Thu, 19 Jan 2023, Jim Brain wrote: GW can do the same, but can also handle GCR encoded disks, the Amiga disks noted above, and it might be able to do older Apple Mac 720K disks All these Weazle thingies are just pulse timing samplers plus floppy drive controllers. The interpretation of the

[cctalk] Re: Computer Museum uses GreaseWeazle to help exonerate Maryland Man

2023-01-20 Thread Christian Corti via cctalk
On Thu, 19 Jan 2023, Fred Cisin wrote: I would recommend 5170 (AT), to also have the 500K bps data transfer rate of its FDC. I just had a good laugh ;-) Newer PCs often have unnecessary complications. Many no longer even support floppies! Since when does the Weazle need a floppy

[cctalk] Re: Disk pack production tools

2023-01-20 Thread Christian Corti via cctalk
On Thu, 19 Jan 2023, David Gesswein wrote: Originally discussing RK05 head position sensor bulb. I have replaced it. The offical part to replace it isn't available. You can open it up and put in a new bulb. I wasn't able to quickly find what bulb I used a number of years ago but if someone

[cctalk] Re: Computer of Thesus (was: Re: Re: Computer Museum uses GreaseWeazle to help exonerate Maryland Man)

2023-01-24 Thread Christian Corti via cctalk
On Mon, 23 Jan 2023, Mike Stein wrote: I think the issue of finding media tends to be a little overstated. I offered some 8" diskettes a while back and didn't have a single inquiry, and there doesn't seem to be a real shortage of other sizes either if you don't mind sorting through used ones;

[cctalk] Re: Computer of Thesus (was: Re: Re: Computer Museum uses GreaseWeazle to help exonerate Maryland Man)

2023-01-24 Thread Christian Corti via cctalk
On Mon, 23 Jan 2023, Don R wrote: From NYT website: You?ve reached your limit of free articles. Purchase a subscription yadda-yadda Delete your cookies and web site caches ;-) (hint: install "Cookie Autodelete" browser add on) Christian

[cctalk] Re: Computer Museum uses GreaseWeazle to help exonerate Maryland Man

2023-01-21 Thread Christian Corti via cctalk
On Fri, 20 Jan 2023, skogkatt...@yahoo.com wrote: So ... can the GW be physically installed on a machine that doesn't have usb capability. But have the data stream analyzed (on the fly) by a different computer via it's usb capability? Ehm, did you even read the documentation or looked at the

[cctalk] Re: USB Attached 5.25" drives?

2023-01-21 Thread Christian Corti via cctalk
On Fri, 20 Jan 2023, Mike Katz wrote: Using the Greaseweazel is a two stage process.  The GW itself connects to the actual drive and just records the flux transitions as a series of zeros and ones.  This is transferred to a computer (PC, MAC, Linux) where the captured Even that is not fully

[cctalk] Re: Rejected messages

2023-01-23 Thread Christian Corti via cctalk
On Sat, 21 Jan 2023, Tony Jones wrote: No but I wish the list was configured differently so From: was the actual sender with a Reply-To of the list. Plus of course ListId: Right now From: is "sender name via cc talk" which isn't unique since some people just have a first name. Plus a Cc:

[cctalk] Re: Computer Museum uses GreaseWeazle to help exonerate Maryland Man

2023-01-23 Thread Christian Corti via cctalk
On Sat, 21 Jan 2023, Bill Gunshannon wrote: Later today I plan to try FlashFloppy. My goal is to eventually replace all of my mechanical floppies with solid state ones. Why would one want to do that? My goal would be the opposite. Upgrade all vintage computers with floppy drives ;-) My

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