Re: Playing with HP2640B

On Thu, 16 Nov 2017, CuriousMarc wrote: What did you do for the screen mold? Hot wire method to separate CRT from implosion window? Put the CRT in a hot water bath? Chip at the glue? Marc What we did on one of our 2645 terminals was the hot wire method. We then attached the "implosion" window

Re: Playing with HP2640B

Marc, in addition to Mattis’ forthcoming reply, my recent experience with a moldy 2624A was that the hot wire method was very poor. Too hard to get the wire in, didn’t melt the ‘glue’ very well, smelly. Gave up when the wire broke. What worked best for me was a flat blade screwdriver that was s

Re: Playing with HP2640B

Christian do you know the gauge of the wire you used ? And the current? Maybe I should try that approach again! David Collins > On 17 Nov 2017, at 8:09 pm, Christian Corti via cctalk > wrote: > >> On Thu, 16 Nov 2017, CuriousMarc wrote: >> What did you do for the screen mold? Hot wire method

Re: Playing with HP2640B

The screen on my HP2640 had degenerated quite far. It was only a spot in the middle, 2 by 4 inch, that still attached the glass to the CRT. I used a thin fish fillet knife to dig through the remaining glue. Before https://scontent-arn2-1.xx.fbcdn.net/v/t1.0-9/23622163_10155696765784985_6518064439

RE: Playing with HP2640B

I did it by heating the crt to about 50-60 degrees celsius and used a putty-knife. https://www.flickr.com/photos/hp-fix/albums/72157689357633754 The photos are from a Philips P2000M system but I did it the same way with my 264X terminals and 9845's systems. It takes about half an hour to heat and

DR-DOS

I hope this is vintage enough. I've been playing around some more with my projects to create VMs / bootable USB keys with PC DOS 7.1 and DR-DOS. Right now I'm focusing on DR-DOS 7.1 and the DR OpenDOS Enhancement Project, because that's FOSS and AFAICS it can be redistributed, which I can't with

Re: TI NaturalLink Disks and Docs

On Nov 16, 2017 21:16, "Jason T" wrote: I have the original manuals, along with some other Professional Computer manuals that were already on Bitsavers, free for shipping if anyone wants them. They're not light. Oops, forgot to mention location. I'm in the USA, near Chicago.

Re: DR-DOS

Might be more helpful to include downloads! I'm still working on VMs, but I know have bootable diskette images of both. To the best of my knowledge, this is the first time either has been made available. DR-DOS 7.08 is here: https://www.dropbox.com/s/cz8nrdv7h4sgr6o/drdep7018.zip?dl=0 You'll ne

Re: DR-DOS

It is *not* my day. I don't know how a copy-and-paste of some plain text magically acquired attachments; that was not intentional. My apologies. -- Liam Proven • Profile: https://about.me/liamproven Email: lpro...@cix.co.uk • Google Mail/Talk/Plus: lpro...@gmail.com Twitter/Facebook/Flickr: lprov

Re: DR-DOS

I have a few original Dr dos disks. Versions 5, 6, 7. Would these help if I am imaged and uploaded to my site? Bill Degnan twitter: billdeg vintagecomputer.net On Nov 17, 2017 10:10 AM, "Liam Proven via cctalk" wrote: > Might be more helpful to include downloads! > > I'm still working on VMs,

Re: Cases (display) for beloved ISA cards?

I mounted a core memory plane in a shadowbox from Target and used a large paperclip cut into sections as the mount hardware. Folded over and hot-glued one end to the read of the shadowbox backing, placed the memory plane at the desired height and folded over the other end of the paperclip section.

Re: DR-DOS

On Fri, 17 Nov 2017, william degnan via cctalk wrote: I have a few original Dr dos disks. Versions 5, 6, 7. Would these help if I am imaged and uploaded to my site? Liam, if you need me to I can build a full distro of OpenDOS 7 - I've got a machine that I can build the original sources on.

Re: DR-DOS

On 17 November 2017 at 16:12, william degnan wrote: > I have a few original Dr dos disks. Versions 5, 6, 7. Would these help if > I am imaged and uploaded to my site? What I'd suggest is checking what's there first. :-) I have DR-DOS 6, from VetusWare. There's a copy on WinWorld but it's some

Re: DR-DOS

On 17 November 2017 at 16:44, geneb via cctalk wrote: > > Liam, if you need me to I can build a full distro of OpenDOS 7 - I've got a > machine that I can build the original sources on. Thanks! For now, I'm trying to avoid building anything. I believe that the build process is horribly complex -

Re: DR-DOS

On Fri, 17 Nov 2017, Liam Proven wrote: On 17 November 2017 at 16:44, geneb via cctalk wrote: Liam, if you need me to I can build a full distro of OpenDOS 7 - I've got a machine that I can build the original sources on. Thanks! For now, I'm trying to avoid building anything. I believe that

Re: WTB: HP-85 16k RAM Module and HPIB Floppy Drive

Check your email. How can you tell if it uses a 600 RPM mechanism or not? On Thu, Nov 16, 2017 at 3:17 AM, Eric Smith wrote: > Hi Eric, > > It's not urgent, but when you have a chance, could you dump the 9122C > ROM(s) and take high resolution photos of the controller board? > > Since it does HD

Manchester University Joint System in the 1970s

I was a student at Manchester University from 1974 to 1980. During that time I used the University of Manchester Regional Computer Centre (UMRCC) computer system. The so-called Joint System consisted of a CDC 7600 with an ICL 1906A front end. We used to submit card decks via a Systime (a PDP-11 clo

Re: WTB: HP-85 16k RAM Module and HPIB Floppy Drive

I just checked my 9122C I happen to have open and the interval between index pulses is 199.66mS  which would be 300 RPM, which is good news for me I can now proceed with adapting a more common 1.44 drive to replace my broken one. Paul. On 2017-11-17 1:04 PM, Eric Schlaepfer via cctalk wrote:

Re: Playing with HP2640B

On Fri, 17 Nov 2017, David Collins wrote: Christian do you know the gauge of the wire you used ? And the current? It was a wire for cutting polystyrene blocks. The current was a fews amperes, I think, driven off a bench power supply. Christian

Re: Manchester University Joint System in the 1970s

On 11/17/2017 09:24 AM, Peter Allan via cctalk wrote: > I was a student at Manchester University from 1974 to 1980. During that > time I used the University of Manchester Regional Computer Centre (UMRCC) > computer system. The so-called Joint System consisted of a CDC 7600 with an > ICL 1906A front

Re: DR-DOS

On Fri, Nov 17, 2017 at 02:30:20PM +0100, Liam Proven via cctalk wrote: > I hope this is vintage enough. [...] > VBox mounts that. But it won't boot, nor in VMware -- it just > displays 2 dots and freezes. > > Embarrassingly late in the troubleshooting process, I've found why. > > I didn't think

RE: Playing with HP2640B

Van: Mattis Lind via cctalk Verzonden: vrijdag 17 november 2017 11:52 Aan: David Collins; General Discussion: On-Topic and Off-Topic Posts Onderwerp: Re: Playing with HP2640B The screen on my HP2640 had

Re: Playing with HP2640B

> Wow! Excellent job Mattis > I have seen that HP2640 when it still was in bad shape. The HP2640, > that I have, has many tiny spots on the screen. Your “result after” > really looks fantastic. Thanks Henk! I have a few more screens that need fixing. The most difficult will be the Tek 4016. So

Re: Manchester University Joint System in the 1970s

On Fri, Nov 17, 2017 at 9:24 AM, Peter Allan via cctalk < cctalk@classiccmp.org> wrote: > I was a student at Manchester University from 1974 to 1980. > If you have suggestions about where else to post this query, I would be > grateful for that too. > > Contact the University Library, check to see

Ideas for a simple, but somewhat extendable computer bus

I'm currently working on a single board computer system, designing from scratch partially as an education experience, and also as something that might be of interest to others. I've laid out the first version of the SBC, and I realize it would cost nothing to add an edge connector on the PCB,

Re: Ideas for a simple, but somewhat extendable computer bus

> On Nov 17, 2017, at 8:11 PM, Jim Brain via cctalk > wrote: > > I'm currently working on a single board computer system, designing from > scratch partially as an education experience, and also as something that > might be of interest to others. > > I've laid out the first version of the SB

Re: Ideas for a simple, but somewhat extendable computer bus

On 11/17/2017 7:25 PM, Paul Koning wrote: One key question is whether it should be asynchronous, as the Unibus is, or synchronous. I thought synchronous would make for a smaller/simpler design, but could be wrong. A synchronous version of the Unibus would be quite easy; all the funny one-shot

Re: Ideas for a simple, but somewhat extendable computer bus

On Nov 17, 2017 8:34 PM, "Jim Brain via cctalk" wrote: > > On 11/17/2017 7:25 PM, Paul Koning wrote: >> >> >> One key question is whether it should be asynchronous, as the Unibus is, or synchronous. > > I thought synchronous would make for a smaller/simpler design, but could be wrong. > >> A synch

Re: Ideas for a simple, but somewhat extendable computer bus

On 11/17/2017 07:34 PM, Jim Brain via cctalk wrote: On 11/17/2017 7:25 PM, Paul Koning wrote: One key question is whether it should be asynchronous, as the Unibus is, or synchronous. I thought synchronous would make for a smaller/simpler design, but could be wrong. A synchronous version of th

Re: Ideas for a simple, but somewhat extendable computer bus

On 11/17/2017 05:34 PM, Jim Brain via cctalk wrote: > It does not have to be fast.  I rather thought, "what is the simplest > multi-cpu shared bus that could be easily understood by folks and allow > them to focus on multi-processing education, not bus understanding" How about a serial bus? Phys

Re: Ideas for a simple, but somewhat extendable computer bus

On 11/17/2017 6:59 PM, Chuck Guzis via cctalk wrote: On 11/17/2017 05:34 PM, Jim Brain via cctalk wrote: It does not have to be fast.  I rather thought, "what is the simplest multi-cpu shared bus that could be easily understood by folks and allow them to focus on multi-processing education, not

Re: Ideas for a simple, but somewhat extendable computer bus

On 2017-11-17 8:55 PM, Jon Elson via cctalk wrote: > On 11/17/2017 07:34 PM, Jim Brain via cctalk wrote: >> On 11/17/2017 7:25 PM, Paul Koning wrote: >>> >>> One key question is whether it should be asynchronous, as the Unibus >>> is, or synchronous. >> I thought synchronous would make for a smalle

Re: Ideas for a simple, but somewhat extendable computer bus

On Fri, Nov 17, 2017 at 5:11 PM, Jim Brain via cctalk wrote: > I'm currently working on a single board computer system, designing from > scratch partially as an education experience, and also as something that > might be of interest to others. > > I don't know how complex the logic is, but VME bu

Re: Drive capacity names (Was: WTB: HP-85 16k RAM Module and HPIB Floppy Drive

On 11/16/2017 03:30 PM, Geoffrey Reed via cctech wrote: > > On 11/15/17, 9:44 AM, "cctalk on behalf of Fred Cisin via cctalk" > wrote: >> Can you name another 20 exceptions? (Chuck and Tony probably can) >> >> >> -- >> Grumpy Ol' Fred ci...@xenosoft.com > > ³Floptical² disks 720 rp

Re: Ideas for a simple, but somewhat extendable computer bus

On 11/17/2017 08:11 PM, Jim Brain via cctalk wrote: > I'm currently working on a single board computer system, designing > from scratch partially as an education experience, and also as > something that might be of interest to others. > > I've laid out the first version of the SBC, and I realize it

Re: Manchester University Joint System in the 1970s

I was there 1980-1984, I don't ever recall using a 7600 though, I thought I used a CDC Cyber 172 (or 170 or something similar). It is possible I may have some records buried at home, but I am away at the moment and they would not be easily accessible. I have to re-arrange a lot of stuff over Christ

Re: Ideas for a simple, but somewhat extendable computer bus

On 11/17/2017 06:33 PM, ben via cctalk wrote: > Say USB-version 101101100 :) No, I'm serious--lowers parts count tremendously. I run SPI at 40 MHz. But for something simpler in a parallel bus there's always STD bus, or STD-32. --Chuck

Re: Drive capacity names (Was: WTB: HP-85 16k RAM Module and HPIB Floppy Drive

On 11/17/2017 09:17 AM, allison via cctech wrote: > Also the Syquest 270mb IDE/parallel port cartridge disk.  I have one > that works > and over a dozen carts.  Its still in use in a ITX box using the IDE > interface.  After > two decades of use it seems solid. I've left out the non-floppy techno

Re: Ideas for a simple, but somewhat extendable computer bus

On 2017-11-17 18:11, Jim Brain via cctalk wrote: I'm currently working on a single board computer system, designing from scratch partially as an education experience, and also as something that might be of interest to others. I've laid out the first version of the SBC, and I realize it would c