Odd disk image format... .552?
Recently found some long-lost images of 5 1/4" floppies that were sent to me... 10-15 years ago. Here's one of them: http://www.corestore.org/RP06.552 I've never seen that .552 file extension before. Any clue? It's possible that refers to a version number rather than some obscure disk image format... (They are allegedly Setasi Shelby RP12 boot disks btw :-) ) Mike http://www.corestore.org 'No greater love hath a man than he lay down his life for his brother. Not for millions, not for glory, not for fame. For one person, in the dark, where no one will ever know or see.'
Re: Odd disk image format... .552?
Original Message - From: "Mike Ross" To: "General Discussion: On-Topic and Off-Topic Posts" Sent: Tuesday, December 22, 2015 9:41 AM Subject: Odd disk image format... .552? > Recently found some long-lost images of 5 1/4" floppies that were sent > to me... 10-15 years ago. Here's one of them: > > http://www.corestore.org/RP06.552 > > I've never seen that .552 file extension before. Any clue? It's > possible that refers to a version number rather than some obscure disk > image format... > > (They are allegedly Setasi Shelby RP12 boot disks btw :-) ) > > Mike > Seems to be a MSDOS 5.0 boot disk, with just one important program, RP06.EXE, on it, and then some support programs. As far as I can see, it is a physical backup. Could the 552 just be a serial number `? /Nico -- I am using the free version of SPAMfighter. SPAMfighter has removed 1433 of my spam emails to date. Get the free SPAMfighter here: http://www.spamfighter.com/len Do you have a slow PC? Try a Free scan http://www.spamfighter.com/SLOW-PCfighter?cid=sigen
Re: Ferroresonant transformers and 3278
On Mon, 21 Dec 2015, William Donzelli wrote: But considering the mix of 50 and 60 Hz stuff you likely have by now (that is what you get for moving!), spending some decent money on a real VFD might be worth it. I might think a cheap VFD may give ferroresonant iron fits with all those extra harmonics. I don't see how a Vacuum Fluorescent Display is of any help here... Or what do you mean by VFD? Christian
Re: Ferroresonant transformers and 3278
On 2015-Dec-22, at 2:07 AM, Christian Corti wrote: > On Mon, 21 Dec 2015, William Donzelli wrote: >> But considering the mix of 50 and 60 Hz stuff you likely have by now >> (that is what you get for moving!), spending some decent money on a >> real VFD might be worth it. I might think a cheap VFD may give >> ferroresonant iron fits with all those extra harmonics. > > I don't see how a Vacuum Fluorescent Display is of any help here... > Or what do you mean by VFD? Variable Frequency Drive. High-power electronic controllers for industrial motors, rather than being limited to the single speed of the fixed line frequency. Must be another expression for them in deutsch.
Re: Ferroresonant transformers and 3278
On Tue, Dec 22, 2015 at 11:07 PM, Christian Corti wrote: > On Mon, 21 Dec 2015, William Donzelli wrote: >> >> But considering the mix of 50 and 60 Hz stuff you likely have by now >> (that is what you get for moving!), spending some decent money on a >> real VFD might be worth it. I might think a cheap VFD may give >> ferroresonant iron fits with all those extra harmonics. > > > I don't see how a Vacuum Fluorescent Display is of any help here... > Or what do you mean by VFD? Variable Frequency Drive I would presume; a common type of industrial power controller. Mike
Re: Ferroresonant transformers and 3278
Ah, a terminal it is! Thank you. On Mon, Dec 21, 2015 at 9:30 PM, William Donzelli wrote: > > Sincere query.. as the goog turns up nothing meaningful.. > > Try IBM 3278. > > Hint: one of those popular terminal families in the world. > > -- > Will >
Re: Ferroresonant transformers and 3278
I'd die for a vt100... :) Enviado do meu Tele-Movel Em 22/12/2015 08:28, "drlegendre ." escreveu: > Ah, a terminal it is! Thank you. > > On Mon, Dec 21, 2015 at 9:30 PM, William Donzelli > wrote: > > > > Sincere query.. as the goog turns up nothing meaningful.. > > > > Try IBM 3278. > > > > Hint: one of those popular terminal families in the world. > > > > -- > > Will > > >
Re: Ferroresonant transformers and 3278
On 2015-Dec-22, at 2:28 AM, drlegendre . wrote: > Ah, a terminal it is! Thank you. > > On Mon, Dec 21, 2015 at 9:30 PM, William Donzelli > wrote: > >>> Sincere query.. as the goog turns up nothing meaningful.. >> >> Try IBM 3278. >> >> Hint: one of those popular terminal families in the world. Funny, I tried googling a bare "3278" and got the terminal in the first of 33,400,000 hits. Must have something to do with one's search history. Used to use 3278s on occasion - in the mainframe terminal room where, as an undergrad, I was not supposed to be. Just be casual and do one's best to look like you belong there. They were so much nicer than the bottom-end Hazeltines in the undergrad lab.
Re: Ferroresonant transformers and 3278
On Tue, Dec 22, 2015 at 5:52 AM, Brent Hilpert wrote: > On 2015-Dec-22, at 2:28 AM, drlegendre . wrote: > > Ah, a terminal it is! Thank you. > > > > On Mon, Dec 21, 2015 at 9:30 PM, William Donzelli > > wrote: > > > >>> Sincere query.. as the goog turns up nothing meaningful.. > >> > >> Try IBM 3278. > >> > >> Hint: one of those popular terminal families in the world. > Sadly, not as plentiful these days as vintage terminals. I've been on the lookout for one for the last couple of years just to add to my collection. Seems that keyboard collectors like the keyboards too because those I have found but not for sale lately.
Re: Ferroresonant transformers and 3278
On Wed, Dec 23, 2015 at 12:44 AM, Santo Nucifora wrote: > On Tue, Dec 22, 2015 at 5:52 AM, Brent Hilpert wrote: > >> On 2015-Dec-22, at 2:28 AM, drlegendre . wrote: >> > Ah, a terminal it is! Thank you. >> > >> > On Mon, Dec 21, 2015 at 9:30 PM, William Donzelli >> > wrote: >> > >> >>> Sincere query.. as the goog turns up nothing meaningful.. >> >> >> >> Try IBM 3278. >> >> >> >> Hint: one of those popular terminal families in the world. >> > > Sadly, not as plentiful these days as vintage terminals. I've been on the > lookout for one for the last couple of years just to add to my collection. > Seems that keyboard collectors like the keyboards too because those I have > found but not for sale lately. They do seem rather thin on the ground. I picked mine up... 15 years ago now and they weren't that common then. And I had a *hell* of a time finding a 3279 - the colour version - even then. Do we have any South American correspondents listening in? I'm sure I read that IBM had a factory in Brazil producing these - and they kept on churning 3278s out for some considerable time after the rest of the world had moved on. I believe it was also stated that there was considerable redesign using more modern components inside that classic 3278 case on these later Brazilian examples. I'd certainly like to get hold of a couple. Mike
Re: Ferroresonant transformers and 3278
That is easy, it is fairly common here. I know of a friend who has some. Enviado do meu Tele-Movel Em 22/12/2015 09:51, "Mike Ross" escreveu: > On Wed, Dec 23, 2015 at 12:44 AM, Santo Nucifora > wrote: > > On Tue, Dec 22, 2015 at 5:52 AM, Brent Hilpert > wrote: > > > >> On 2015-Dec-22, at 2:28 AM, drlegendre . wrote: > >> > Ah, a terminal it is! Thank you. > >> > > >> > On Mon, Dec 21, 2015 at 9:30 PM, William Donzelli < > wdonze...@gmail.com> > >> > wrote: > >> > > >> >>> Sincere query.. as the goog turns up nothing meaningful.. > >> >> > >> >> Try IBM 3278. > >> >> > >> >> Hint: one of those popular terminal families in the world. > >> > > > > Sadly, not as plentiful these days as vintage terminals. I've been on > the > > lookout for one for the last couple of years just to add to my > collection. > > Seems that keyboard collectors like the keyboards too because those I > have > > found but not for sale lately. > > They do seem rather thin on the ground. I picked mine up... 15 years > ago now and they weren't that common then. And I had a *hell* of a > time finding a 3279 - the colour version - even then. > > Do we have any South American correspondents listening in? I'm sure I > read that IBM had a factory in Brazil producing these - and they kept > on churning 3278s out for some considerable time after the rest of the > world had moved on. I believe it was also stated that there was > considerable redesign using more modern components inside that classic > 3278 case on these later Brazilian examples. I'd certainly like to get > hold of a couple. > > Mike >
Re: Ferroresonant transformers and 3278
Oh then we should talk... do you know what condition they are in and what power they are designed for? I'd definitely be interested in getting a couple in good shape - although shipping to NZ would be... expensive! Contact me off-list if you like. Mike On Wed, Dec 23, 2015 at 12:55 AM, Alexandre Souza wrote: > That is easy, it is fairly common here. I know of a friend who has some. > > Enviado do meu Tele-Movel > Em 22/12/2015 09:51, "Mike Ross" escreveu: > >> On Wed, Dec 23, 2015 at 12:44 AM, Santo Nucifora >> wrote: >> > On Tue, Dec 22, 2015 at 5:52 AM, Brent Hilpert >> wrote: >> > >> >> On 2015-Dec-22, at 2:28 AM, drlegendre . wrote: >> >> > Ah, a terminal it is! Thank you. >> >> > >> >> > On Mon, Dec 21, 2015 at 9:30 PM, William Donzelli < >> wdonze...@gmail.com> >> >> > wrote: >> >> > >> >> >>> Sincere query.. as the goog turns up nothing meaningful.. >> >> >> >> >> >> Try IBM 3278. >> >> >> >> >> >> Hint: one of those popular terminal families in the world. >> >> >> > >> > Sadly, not as plentiful these days as vintage terminals. I've been on >> the >> > lookout for one for the last couple of years just to add to my >> collection. >> > Seems that keyboard collectors like the keyboards too because those I >> have >> > found but not for sale lately. >> >> They do seem rather thin on the ground. I picked mine up... 15 years >> ago now and they weren't that common then. And I had a *hell* of a >> time finding a 3279 - the colour version - even then. >> >> Do we have any South American correspondents listening in? I'm sure I >> read that IBM had a factory in Brazil producing these - and they kept >> on churning 3278s out for some considerable time after the rest of the >> world had moved on. I believe it was also stated that there was >> considerable redesign using more modern components inside that classic >> 3278 case on these later Brazilian examples. I'd certainly like to get >> hold of a couple. >> >> Mike >> -- http://www.corestore.org 'No greater love hath a man than he lay down his life for his brother. Not for millions, not for glory, not for fame. For one person, in the dark, where no one will ever know or see.'
Re: Ferroresonant transformers and 3278
On Tue, Dec 22, 2015 at 6:55 AM, Alexandre Souza < alexandre.tabaj...@gmail.com> wrote: > That is easy, it is fairly common here. I know of a friend who has some. > > Enviado do meu Tele-Movel > Em 22/12/2015 09:51, "Mike Ross" escreveu: > > > Do we have any South American correspondents listening in? I'm sure I > > read that IBM had a factory in Brazil producing these - and they kept > > on churning 3278s out for some considerable time after the rest of the > > world had moved on. I believe it was also stated that there was > > considerable redesign using more modern components inside that classic > > 3278 case on these later Brazilian examples. I'd certainly like to get > > hold of a couple. > > > > Mike > > > I'd be interested in one, after Mike who started the thread. I am in Canada. Email me off list. Thanks, Santo Nucifora
Re: Odd disk image format... .552?
On Tue, Dec 22, 2015 at 10:17 PM, Nico de Jong wrote: > Original Message - > From: "Mike Ross" > To: "General Discussion: On-Topic and Off-Topic Posts" > > Sent: Tuesday, December 22, 2015 9:41 AM > Subject: Odd disk image format... .552? > > >> Recently found some long-lost images of 5 1/4" floppies that were sent >> to me... 10-15 years ago. Here's one of them: >> >> http://www.corestore.org/RP06.552 >> >> I've never seen that .552 file extension before. Any clue? It's >> possible that refers to a version number rather than some obscure disk >> image format... >> >> (They are allegedly Setasi Shelby RP12 boot disks btw :-) ) >> >> Mike >> > Seems to be a MSDOS 5.0 boot disk, with just one important program, > RP06.EXE, on it, and then some support programs. > As far as I can see, it is a physical backup. Could the 552 just be a serial > number `? That's kinda what I expected actually... so you reckon they're just in normal raw image format for e.g. Rawrite? http://www.corestore.org 'No greater love hath a man than he lay down his life for his brother. Not for millions, not for glory, not for fame. For one person, in the dark, where no one will ever know or see.'
RE: Ferroresonant transformers and 3278
> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Santo > Nucifora > Sent: 22 December 2015 12:00 > To: General Discussion: On-Topic and Off-Topic Posts > > Subject: Re: Ferroresonant transformers and 3278 > > On Tue, Dec 22, 2015 at 6:55 AM, Alexandre Souza < > alexandre.tabaj...@gmail.com> wrote: > > > That is easy, it is fairly common here. I know of a friend who has some. > > > > Enviado do meu Tele-Movel > > Em 22/12/2015 09:51, "Mike Ross" escreveu: > > > > > Do we have any South American correspondents listening in? I'm sure > > > I read that IBM had a factory in Brazil producing these - and they > > > kept on churning 3278s out for some considerable time after the rest > > > of the world had moved on. I believe it was also stated that there > > > was considerable redesign using more modern components inside that > > > classic > > > 3278 case on these later Brazilian examples. I'd certainly like to > > > get hold of a couple. > > > > > > Mike > > > > > > > I'd be interested in one, after Mike who started the thread. I am in Canada. > Email me off list. > > Thanks, > Santo Nucifora Well I have been looking for one in the UK with no luck. I have some ICL/Nokia clones but not a real 3270 Dave
RE: Ferroresonant transformers and 3278
His address is symphony.robot...@gmail.com. his name is Sergio. You can all talk directly to him. Enviado do meu Tele-Movel Em 22/12/2015 10:06, "Dave Wade" escreveu: > > > > -Original Message- > > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Santo > > Nucifora > > Sent: 22 December 2015 12:00 > > To: General Discussion: On-Topic and Off-Topic Posts > > > > Subject: Re: Ferroresonant transformers and 3278 > > > > On Tue, Dec 22, 2015 at 6:55 AM, Alexandre Souza < > > alexandre.tabaj...@gmail.com> wrote: > > > > > That is easy, it is fairly common here. I know of a friend who has > some. > > > > > > Enviado do meu Tele-Movel > > > Em 22/12/2015 09:51, "Mike Ross" escreveu: > > > > > > > Do we have any South American correspondents listening in? I'm sure > > > > I read that IBM had a factory in Brazil producing these - and they > > > > kept on churning 3278s out for some considerable time after the rest > > > > of the world had moved on. I believe it was also stated that there > > > > was considerable redesign using more modern components inside that > > > > classic > > > > 3278 case on these later Brazilian examples. I'd certainly like to > > > > get hold of a couple. > > > > > > > > Mike > > > > > > > > > > > I'd be interested in one, after Mike who started the thread. I am in > Canada. > > Email me off list. > > > > Thanks, > > Santo Nucifora > > > Well I have been looking for one in the UK with no luck. I have some > ICL/Nokia clones but not a real 3270 > > Dave > >
Re: Ferroresonant transformers and 3278
I've sent him an email. In case he doesn't get it you could ask him to check his spam folder! :-) Thanks! On Wed, Dec 23, 2015 at 1:10 AM, Alexandre Souza wrote: > His address is symphony.robot...@gmail.com. his name is Sergio. You can all > talk directly to him. > > Enviado do meu Tele-Movel > Em 22/12/2015 10:06, "Dave Wade" escreveu: > >> >> >> > -Original Message- >> > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Santo >> > Nucifora >> > Sent: 22 December 2015 12:00 >> > To: General Discussion: On-Topic and Off-Topic Posts >> > >> > Subject: Re: Ferroresonant transformers and 3278 >> > >> > On Tue, Dec 22, 2015 at 6:55 AM, Alexandre Souza < >> > alexandre.tabaj...@gmail.com> wrote: >> > >> > > That is easy, it is fairly common here. I know of a friend who has >> some. >> > > >> > > Enviado do meu Tele-Movel >> > > Em 22/12/2015 09:51, "Mike Ross" escreveu: >> > > >> > > > Do we have any South American correspondents listening in? I'm sure >> > > > I read that IBM had a factory in Brazil producing these - and they >> > > > kept on churning 3278s out for some considerable time after the rest >> > > > of the world had moved on. I believe it was also stated that there >> > > > was considerable redesign using more modern components inside that >> > > > classic >> > > > 3278 case on these later Brazilian examples. I'd certainly like to >> > > > get hold of a couple. >> > > > >> > > > Mike >> > > > >> > > >> > >> > I'd be interested in one, after Mike who started the thread. I am in >> Canada. >> > Email me off list. >> > >> > Thanks, >> > Santo Nucifora >> >> >> Well I have been looking for one in the UK with no luck. I have some >> ICL/Nokia clones but not a real 3270 >> >> Dave >> >> -- http://www.corestore.org 'No greater love hath a man than he lay down his life for his brother. Not for millions, not for glory, not for fame. For one person, in the dark, where no one will ever know or see.'
Re: Ferroresonant transformers and 3278
I have also sent him an email. Thanks Alexandre. On Tue, Dec 22, 2015 at 7:26 AM, Mike Ross wrote: > I've sent him an email. In case he doesn't get it you could ask him to > check his spam folder! :-) > > Thanks! > > On Wed, Dec 23, 2015 at 1:10 AM, Alexandre Souza > wrote: > > His address is symphony.robot...@gmail.com. his name is Sergio. You can > all > > talk directly to him. > > > > Enviado do meu Tele-Movel > > Em 22/12/2015 10:06, "Dave Wade" escreveu: > > > >> > >> > >> > -Original Message- > >> > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of > Santo > >> > Nucifora > >> > Sent: 22 December 2015 12:00 > >> > To: General Discussion: On-Topic and Off-Topic Posts > >> > > >> > Subject: Re: Ferroresonant transformers and 3278 > >> > > >> > On Tue, Dec 22, 2015 at 6:55 AM, Alexandre Souza < > >> > alexandre.tabaj...@gmail.com> wrote: > >> > > >> > > That is easy, it is fairly common here. I know of a friend who has > >> some. > >> > > > >> > > Enviado do meu Tele-Movel > >> > > Em 22/12/2015 09:51, "Mike Ross" escreveu: > >> > > > >> > > > Do we have any South American correspondents listening in? I'm > sure > >> > > > I read that IBM had a factory in Brazil producing these - and they > >> > > > kept on churning 3278s out for some considerable time after the > rest > >> > > > of the world had moved on. I believe it was also stated that there > >> > > > was considerable redesign using more modern components inside that > >> > > > classic > >> > > > 3278 case on these later Brazilian examples. I'd certainly like to > >> > > > get hold of a couple. > >> > > > > >> > > > Mike > >> > > > > >> > > > >> > > >> > I'd be interested in one, after Mike who started the thread. I am in > >> Canada. > >> > Email me off list. > >> > > >> > Thanks, > >> > Santo Nucifora > >> > >> > >> Well I have been looking for one in the UK with no luck. I have some > >> ICL/Nokia clones but not a real 3270 > >> > >> Dave > >> > >> > > > > -- > > http://www.corestore.org > 'No greater love hath a man than he lay down his life for his brother. > Not for millions, not for glory, not for fame. > For one person, in the dark, where no one will ever know or see.' >
Fw: Odd disk image format... .552?
On Tue, Dec 22, 2015 at 10:17 PM, Nico de Jong wrote: > Original Message - > From: "Mike Ross" > To: "General Discussion: On-Topic and Off-Topic Posts" >> >> Sent: Tuesday, December 22, 2015 9:41 AM >> Subject: Odd disk image format... .552? >> >> >>> Recently found some long-lost images of 5 1/4" floppies that were sent >>> to me... 10-15 years ago. Here's one of them: >>> >>> http://www.corestore.org/RP06.552 >>> >> Seems to be a MSDOS 5.0 boot disk, with just one important program, >> RP06.EXE, on it, and then some support programs. >> As far as I can see, it is a physical backup. Could the 552 just be a serial >> number `? > >That's kinda what I expected actually... so you reckon they're just in >normal raw image format for e.g. Rawrite? > Suppose so. They took a complete disc, sector by sector, and wrote it as a file. /Nico
Re: Fw: Odd disk image format... .552?
On 2015-12-22 10:08 AM, Nico de Jong wrote: On Tue, Dec 22, 2015 at 10:17 PM, Nico de Jong wrote: Original Message - From: "Mike Ross" To: "General Discussion: On-Topic and Off-Topic Posts" Sent: Tuesday, December 22, 2015 9:41 AM Subject: Odd disk image format... .552? Recently found some long-lost images of 5 1/4" floppies that were sent to me... 10-15 years ago. Here's one of them: http://www.corestore.org/RP06.552 Seems to be a MSDOS 5.0 boot disk, with just one important program, RP06.EXE, on it, and then some support programs. As far as I can see, it is a physical backup. Could the 552 just be a serial number `? That's kinda what I expected actually... so you reckon they're just in normal raw image format for e.g. Rawrite? Suppose so. They took a complete disc, sector by sector, and wrote it as a file. /Nico I would agree that it is just a sector by sector binary dump done with something like dd or rawwrite, however it is not a 5.25 diskette the format is 80 trks 18 sect 2 heads and media descriptor is 0xF0 which would be a 1.44 MB 3.5 diskette. Paul.
Re: The best spreadsheet / database program for Commodore 64?
I'll check on the other URLs a little later. A very cursory glance at eBay shows multiple Magic Desk cartridges for around $12. On Sunday, December 20, 2015, Mike Boyle wrote: > On Sun, Dec 20, 2015 at 9:48 AM, Mike Whalen > > wrote: > > > On Saturday, December 19, 2015, Mike > wrote: > > > > > Is there anything like Appleworks 1.0 for the commodore 64? if so could > > > you be kind enough to give me the name of the program? I have searched > > > but have found nothing of any value. I just would like a checkbool > > > ledger and a savings spreadsheet. > > > > > > > The first one that comes to mind is Magic Desk. It's primitive and, > > apparently, had some issues. http://toastytech.com/guis/magdesk.html > > > > I remember using that one. The interface is wicked slow. > > > > GEOS was also pretty well populated with various applications like the > ones > > you seek. You'd need a mouse for hardware and, unfortunately, I've not > had > > an easy time getting it to work well in emulation. > > https://en.m.wikipedia.org/wiki/GEOS_(8-bit_operating_system) > > > > GEOS was fun, fun to play with. > > > > You can look at the software produced by Batteries Included. They did > > produce an integrated suite but not with all the modules you seek. BI > > produced tons of productivity software for the platform. > > https://en.m.wikipedia.org/wiki/Batteries_Included_(company) > > > > > > -- > MIKE MIKE MIKE!!! That is perfect I bet that cart is going to be a pretty > penny I wonder if anyone on here would have one they would like to sell?? > > P.S. Hey Mike the first link worked great but the 2nd 2 were dead ends :( > but thank you so very much for the info that Magic Desk is just what I am > looking for!!! > > *Mike's Honda ATC 3wheeler Shop for LIFE!!!* > > * Have a blessed day!* >
Now this person is optimistic
Check out: http://www.ebay.com/itm/DEC-PDP8-I-MINICOMPUTER-PDP8-PDP-8-PDP-8/201487700097 I know it has a bunch of DECTape drives, but... Noel
RE: VAX 4000-500 PSU Overload?
> -Original Message- > From: Robert Jarratt [mailto:robert.jarr...@ntlworld.com] > Sent: 20 December 2015 07:04 > To: 'General Discussion: On-Topic and Off-Topic Posts' > Subject: RE: VAX 4000-500 PSU Overload? > > > > The problem is just how to physically do it. But in any case I don't think it is > necessary to do this now, as I have been able to reproduce the problem on > the bench now. It looks like the 12V side starts up and then shuts down, > sometimes after a few seconds, sometimes after a couple of minutes, > sometimes it does not even start to output the right voltage. I am pretty sure > that it is falsely detecting overcurrent. The problem is going to be finding and > fixing the part that is not working, there are a lot of tiny surface mount > components that seem to process the signal from the current sense > resistor > I was just reading the BA440 enclosure manual, and realised that the PSU will shut down the system if it thinks the fan has failed. When I have the PSU on the bench I don't have the fan connected of course. This would explain the shut downs on the bench even when under low loads, it could be just that it is detecting fan failure. At this point I realise I could be barking up completely the wrong tree in suspecting faulty overcurrent detection. This PSU is really hard to diagnose, because it is so complex, especially because it has a pretty complex interface to the backplane, not just power, but also, seemingly, a fair number of control signals. I can't really tell why it is shutting down, which makes it difficult to know where to begin once the basics have been checked. Regards Rob
Re: Now this person is optimistic
On Tue, Dec 22, 2015 at 9:55 AM, Noel Chiappa wrote: > Check out: > > > http://www.ebay.com/itm/DEC-PDP8-I-MINICOMPUTER-PDP8-PDP-8-PDP-8/201487700097 > > I know it has a bunch of DECTape drives, but... > > Noel > I could see the final sale being north of $15,000 -- Bill
Re: Now this person is optimistic
$50,000 BIN, in unknown condition but had failing electronics when last booted 18 years ago? Yikes! For that money, I'd expect it working, debugged, and free worldwide white glove delivery... and it's still too much. TK On Tue, Dec 22, 2015 at 9:55 AM, Noel Chiappa wrote: > Check out: > > > http://www.ebay.com/itm/DEC-PDP8-I-MINICOMPUTER-PDP8-PDP-8-PDP-8/201487700097 > > I know it has a bunch of DECTape drives, but... > > Noel >
Re: Now this person is optimistic
I can see that as well - and I can see a slim chance of it actually going for $25K, as well. Cripes, those TUs are half way there! Think of the time of the year, and think of the size bonuses that some people get. -- Will On Tue, Dec 22, 2015 at 10:28 AM, william degnan wrote: > On Tue, Dec 22, 2015 at 9:55 AM, Noel Chiappa > wrote: > >> Check out: >> >> >> http://www.ebay.com/itm/DEC-PDP8-I-MINICOMPUTER-PDP8-PDP-8-PDP-8/201487700097 >> >> I know it has a bunch of DECTape drives, but... >> >> Noel >> > > I could see the final sale being north of $15,000 > > -- > Bill
Re: Ferroresonant transformers and 3278
Another thought - with scrap transformer prices in a crapper right now. you might also be able to pick up a really beefy isolation transformer for spare change, in order to clean up a VFD. Generally, normal industrial grade 50 Hz transformers will not care too much if you use them at 60 Hz. -- Will On Mon, Dec 21, 2015 at 10:45 PM, Mike Ross wrote: > H. > > I do have a massive idler motor - as in it takes two people to even > think about lifting it - from my days in NY when I had to manufacture > a 3rd phase to make the S/3 and other items work... I wonder if I > could do anything using that as a starting point? > > Three phase is no problem here... previous owner of house was a > woodworker and I have 3-phase 50Hz 400V straight to the workshop > already wired in :-) > > Finagle's law says 90% of my 3-phase big iron was acquired in the USA > and expects 3-phase 60Hz 208V... :-( > > Mike > > On Tue, Dec 22, 2015 at 4:03 PM, William Donzelli wrote: >> If you can get a rotary one, those are really nice - just wasteful and >> loud. With proper maintenance they last forever, can take a beating, >> and do not give waveshape issues that cheap solid state units can >> have. And, maybe most importantly, you can make one yourself. >> >> But considering the mix of 50 and 60 Hz stuff you likely have by now >> (that is what you get for moving!), spending some decent money on a >> real VFD might be worth it. I might think a cheap VFD may give >> ferroresonant iron fits with all those extra harmonics. >> >> -- >> Will >> >> On Mon, Dec 21, 2015 at 9:48 PM, Mike Ross wrote: >>> Any recommendations for what type? Are solid-state devices up to the >>> job these days? I still remember rotary converters... >>> >>> Mike >>> >>> On Tue, Dec 22, 2015 at 3:45 PM, William Donzelli >>> wrote: In the long term, you should probably break down and get a good size frequency converter. -- Will On Mon, Dec 21, 2015 at 9:33 PM, Mike Ross wrote: > I recently blew up a 3278... it worked ok for a few hours then started > blowing fuses. > > I haven't done any troubleshooting yet but checking the manuals on > Bitsavers tells me my US 3278s have ferroresonant transformers > specified as 120V 60Hz only. This can be expected to cause problems > with 120V 50Hz here in NZ from my knowledge of how ferroresonant > transformers work; I'll get excessive magnetic currents - overheating > - all kinds of nasties. I can wind the voltage down a bit and run them > at 90-100V but that doesn't help much. > > 1. Does anyone in a 50Hz country have any dead/spare 3278s and/or > transformers for them? The IBM part number for the 50Hz 220V are > 8715343 or 4119686. > > 2. I have other equipment where this will be an issue and not so > easily solved. Does anyone have any experience in or recommendations > for frequency conversion equipment? My System/3s for instance all use > 60Hz ferroresonants operating off 208V 3-phase - now voltage can > probably be retapped or easily converted but I still need to make a > lot of 60Hz to run them... > > Thanks > > Mike > > http://www.corestore.org > 'No greater love hath a man than he lay down his life for his brother. > Not for millions, not for glory, not for fame. > For one person, in the dark, where no one will ever know or see.' >>> >>> >>> >>> -- >>> >>> http://www.corestore.org >>> 'No greater love hath a man than he lay down his life for his brother. >>> Not for millions, not for glory, not for fame. >>> For one person, in the dark, where no one will ever know or see.'
XY11 Manual, Anyone?
I have in mind to connect a machine to an IBM 1627 (CALCOMP 565) plotter and then the XY11 which just arrive would fit nicely, I think. But I cannot seem to find any manual for the XY11. Anyone know of a manual? The board is rather simple so it should be possible to work out the details on how to interface it by hand but it would be nice to have the proper manual. Then for software I found a diagnostic, XXYAD0 that supposedly should draw a square and a rectangle. Anyone know of other drawing software that uses the XY11 /Mattis
Re: Ferroresonant transformers and 3278
On 12/22/2015 10:25 AM, William Donzelli wrote: Another thought - with scrap transformer prices in a crapper right now. you might also be able to pick up a really beefy isolation transformer for spare change, in order to clean up a VFD. Generally, normal industrial grade 50 Hz transformers will not care too much if you use them at 60 Hz. An isolation transformer will NOT "clean up" a VFD's output. The output of a VFD is NOT some dirty sine wave, it is a train of 400 V PWM pulses with perhaps a 15 KHz carrier frequency. It could be filtered, but would take a filter built out of a bunch of HUGE inductors and capacitors. It might actually be a decent solution for keeping museum-quality gear running in an unaltered state, but it isn't something you could whip up in a couple hours in your garage. Jon
Re: Ferroresonant transformers and 3278
Some VFDs are not just plain PWM pulses, but a stepped sort of thing that sort-of approximates a sinewave. As I said, all this depends on what VFD you are using, and what you might have to act as a filter, and what the load is - a case-by-case thing. -- Will On Tue, Dec 22, 2015 at 12:12 PM, Jon Elson wrote: > On 12/22/2015 10:25 AM, William Donzelli wrote: >> >> Another thought - with scrap transformer prices in a crapper right >> now. you might also be able to pick up a really beefy isolation >> transformer for spare change, in order to clean up a VFD. Generally, >> normal industrial grade 50 Hz transformers will not care too much if >> you use them at 60 Hz. >> > An isolation transformer will NOT "clean up" a VFD's output. The output of > a VFD is NOT some dirty sine wave, it is a train of 400 V PWM pulses with > perhaps a 15 KHz carrier frequency. It could be filtered, but would take a > filter built out of a bunch of HUGE inductors and capacitors. It might > actually be a decent solution for keeping museum-quality gear running in an > unaltered state, but it isn't something you could whip up in a couple hours > in your garage. > > Jon
Apple II keyboard WTB
Hey everyone, just got my Apple1 powered up!!! The PIA is hot to the touch, I heard they run hot, how hot is too hot?? Looking for an Apple II keyboard to convert for use on my Apple1. Anyone have one for sale or trade? Thanks! -Nick
Re: Fw: Odd disk image format... .552?
Could the 552 just be a serial number `? It is the version number of the program There is an entry in the directory "RPO6VER522" along with "RP06.EXE"
Re: Fw: Odd disk image format... .552?
On 12/22/15 10:57 AM, Al Kossow wrote: Could the 552 just be a serial number `? It is the version number of the program There is an entry in the directory "RPO6VER522" along with "RP06.EXE" It is nice that the Massbus emulator disks have been found.
Piggybacking 74LS logic chips to confirm a suspected fault
Hi, I've written up my recent third Apple II repair, this time an Apple IIe. http://www.classic-computers.org.nz/blog/2015-12-22-appleiIIe-no-video.htm One interesting aspect of this repair is that piggy-backing a logic chip helped confirm a faulty one. I'd only ever used this technique with RAM. I'm sure it only works if the chip has a particular type of fault, but it worked this time for me. Terry (Tez)
RE: Piggybacking 74LS logic chips to confirm a suspected fault
> -Oorspronkelijk bericht- > Van: cctalk [mailto:cctalk-boun...@classiccmp.org] Namens Terry Stewart > Verzonden: dinsdag 22 december 2015 21:50 > Aan: General Discussion: On-Topic and Off-Topic Posts > Onderwerp: Piggybacking 74LS logic chips to confirm a suspected fault > > Hi, > > I've written up my recent third Apple II repair, this time an Apple IIe. > http://www.classic-computers.org.nz/blog/2015-12-22-appleiIIe-no-video.htm > > One interesting aspect of this repair is that piggy-backing a logic chip > helped > confirm a faulty one. I'd only ever used this technique with RAM. > I'm sure it only works if the chip has a particular type of fault, but it > worked this > time for me. > > Terry (Tez) I use a HP 10529A logic comparator on regular basis for fault finding in ttl circuits. It compares a reference chip with the CUT (Chip under test;) it's a very nice diagnostic tool. It's a bit like piggy backing just a little more sophisticated :0 -Rik
RE: Piggybacking 74LS logic chips to confirm a suspected fault
It works if the gate is open. But if it is shorted to gnd/vcc, you're in trouble :) Enviado do meu Tele-Movel Em 22/12/2015 19:09, "Rik Bos" escreveu: > > > > -Oorspronkelijk bericht- > > Van: cctalk [mailto:cctalk-boun...@classiccmp.org] Namens Terry Stewart > > Verzonden: dinsdag 22 december 2015 21:50 > > Aan: General Discussion: On-Topic and Off-Topic Posts > > Onderwerp: Piggybacking 74LS logic chips to confirm a suspected fault > > > > Hi, > > > > I've written up my recent third Apple II repair, this time an Apple IIe. > > > http://www.classic-computers.org.nz/blog/2015-12-22-appleiIIe-no-video.htm > > > > One interesting aspect of this repair is that piggy-backing a logic chip > helped > > confirm a faulty one. I'd only ever used this technique with RAM. > > I'm sure it only works if the chip has a particular type of fault, but > it worked this > > time for me. > > > > Terry (Tez) > > I use a HP 10529A logic comparator on regular basis for fault finding in > ttl circuits. > It compares a reference chip with the CUT (Chip under test;) it's a very > nice diagnostic tool. > It's a bit like piggy backing just a little more sophisticated :0 > > -Rik > >
Re: Piggybacking 74LS logic chips to confirm a suspected fault
>It works if the gate is open. But if it is shorted to gnd/vcc, you're in >trouble :) Yea. In my case the chip was quite cool, so I figured it wasn't shorted and took the risk. On reflection checking vcc/gnd with a multimeter would be a more definitive way of checking for a short of that nature. Tez On Wed, Dec 23, 2015 at 10:10 AM, Alexandre Souza < alexandre.tabaj...@gmail.com> wrote: > It works if the gate is open. But if it is shorted to gnd/vcc, you're in > trouble :) > > Enviado do meu Tele-Movel > Em 22/12/2015 19:09, "Rik Bos" escreveu: > > > > > > > > -Oorspronkelijk bericht- > > > Van: cctalk [mailto:cctalk-boun...@classiccmp.org] Namens Terry > Stewart > > > Verzonden: dinsdag 22 december 2015 21:50 > > > Aan: General Discussion: On-Topic and Off-Topic Posts > > > Onderwerp: Piggybacking 74LS logic chips to confirm a suspected fault > > > > > > Hi, > > > > > > I've written up my recent third Apple II repair, this time an Apple > IIe. > > > > > > http://www.classic-computers.org.nz/blog/2015-12-22-appleiIIe-no-video.htm > > > > > > One interesting aspect of this repair is that piggy-backing a logic > chip > > helped > > > confirm a faulty one. I'd only ever used this technique with RAM. > > > I'm sure it only works if the chip has a particular type of fault, but > > it worked this > > > time for me. > > > > > > Terry (Tez) > > > > I use a HP 10529A logic comparator on regular basis for fault finding in > > ttl circuits. > > It compares a reference chip with the CUT (Chip under test;) it's a very > > nice diagnostic tool. > > It's a bit like piggy backing just a little more sophisticated :0 > > > > -Rik > > > > >
Re: Piggybacking 74LS logic chips to confirm a suspected fault
On 12/22/2015 01:10 PM, Alexandre Souza wrote: It works if the gate is open. But if it is shorted to gnd/vcc, you're in trouble :) In my experience, this is the case with a lot of 4000-series CMOS. Don't exactly understand why. --Chuck
Re: Piggybacking 74LS logic chips to confirm a suspected fault
Becaise they have diodes to gnd/vcc. And the common failure of a diode is a rupture of the barrier and so, it gets shorted. So the gate is shorted to ground or vcc Enviado do meu Tele-Movel Em 22/12/2015 19:29, "Chuck Guzis" escreveu: > On 12/22/2015 01:10 PM, Alexandre Souza wrote: > >> It works if the gate is open. But if it is shorted to gnd/vcc, you're >> in trouble :) >> > > In my experience, this is the case with a lot of 4000-series CMOS. Don't > exactly understand why. > > --Chuck > > > >
Re: RE: EAI TR-10 Patch Plugs
On 2015-12-20 23:43, Dave Wade wrote: -Original Message- From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of ste...@malikoff.com Sent: 20 December 2015 22:23 To: General Discussion: On-Topic and Off-Topic Posts Subject: RE: EAI TR-10 Patch Plugs Original Message Subject: RE: EAI TR-10 Patch Plugs From:"Dave Wade" Date:Mon, December 21, 2015 3:46 am To: "'General Discussion: On-Topic and Off-Topic Posts'" -- -Original Message- From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of ste...@malikoff.com Sent: 20 December 2015 02:10 To: General Discussion: On-Topic Posts Subject: Re: EAI TR-10 Patch Plugs Original Message Subject: EAI TR-10 Patch Plugs From:"Dave Wade" Date:Sun, December 20, 2015 6:41 am To: "'General Discussion: On-Topic Posts'" - - Folks, I own an EAI TR-10 analog computer which sadly came without any patch cables and accessories. Normally this wouldn't be a problem, BUT the TR-10 comes with special resistive plugs which go at the ends of the patch leads. These have a 4mm plug and socket with a 10k or 100k resistor in between. I can't figure out a way to easily fabricate replacements. I can easily obtain 4mm plugs and sockets, and solder a resistor between them, but when I try and mount them on a short rigid tube all my efforts fail. The plug and socket need to be twisted in opposite directions and any soldered joint just fails. Any usggestions? Does any one have some of these and if so how are they constructed? Dave Wade G4UGM Would you be able to put up some photos of what you have, an original, and with a ruler included for scale? I don't have anything! The last picture on this page shows the items:- http://www.analogmuseum.org/english/collection/eai/tr10/ and the plugs on these are standard "4mm" wander plugs, so the part containing the resistor must be about 1" to 1.5" long. There is a 4mm socket in the end and either a 1k or 10k resistor. Dave Ah, ok, now I get it. Could you use two of the banana jack barrels, cut in half (machine them would be better) so that they can be contrarotated, then superglue or solvent glue the seam when tightened against eachother? If I cut them with a saw I end up with a gap. SuperGlue does not gap fill. I am kind of leaning towards casting resin Steve. Actually, super glue does gap fill. Use the thick stuff and sprinkle baking soda on the glue after applying. It will set rock hard instantly. The plastic model crowd use this for gap filling instead of putty sometimes. Jonas
Re: Piggybacking 74LS logic chips to confirm a suspected fault
Or it is a mechanical fault due to a package/die bond wire becoming an open circuit. This could happen to where the wire joins to either the package or the die pad, or a wire that was fused due to excess current. Hard to tell unless you decap the package. On 12/22/2015 1:32 PM, Alexandre Souza wrote: Becaise they have diodes to gnd/vcc. And the common failure of a diode is a rupture of the barrier and so, it gets shorted. So the gate is shorted to ground or vcc Enviado do meu Tele-Movel Em 22/12/2015 19:29, "Chuck Guzis" escreveu: On 12/22/2015 01:10 PM, Alexandre Souza wrote: It works if the gate is open. But if it is shorted to gnd/vcc, you're in trouble :) In my experience, this is the case with a lot of 4000-series CMOS. Don't exactly understand why. --Chuck
RE: RE: EAI TR-10 Patch Plugs
> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Jonas > Otter > Sent: 22 December 2015 21:35 > To: cctalk@classiccmp.org > Subject: Re: RE: EAI TR-10 Patch Plugs > > On 2015-12-20 23:43, Dave Wade wrote: > > > >> -Original Message- > >> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of > >> ste...@malikoff.com > >> Sent: 20 December 2015 22:23 > >> To: General Discussion: On-Topic and Off-Topic Posts > >> > >> Subject: RE: EAI TR-10 Patch Plugs > >> > >> Original Message > >> > >> Subject: RE: EAI TR-10 Patch Plugs > >> From:"Dave Wade" > >> Date:Mon, December 21, 2015 3:46 am > >> To: "'General Discussion: On-Topic and Off-Topic Posts'" > >> > >> - > >> - > >> > >>> > -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of > ste...@malikoff.com > Sent: 20 December 2015 02:10 > To: General Discussion: On-Topic Posts > Subject: Re: EAI TR-10 Patch Plugs > > > Original Message > > Subject: EAI TR-10 Patch Plugs > From:"Dave Wade" > Date:Sun, December 20, 2015 6:41 am > To: "'General Discussion: On-Topic Posts'" > --- > -- > - > > > Folks, > > > > I own an EAI TR-10 analog computer which sadly came without any > > patch cables and accessories. Normally this wouldn't be a problem, > > BUT the > > TR-10 comes with special resistive plugs which go at the ends of > > the patch leads. These have a 4mm plug and socket with a 10k or > > 100k resistor in between. I can't figure out a way to easily > > fabricate replacements. I can easily obtain 4mm plugs and sockets, > > and solder a resistor between them, but when I try and mount them > > on a short rigid tube all my efforts fail. The plug and socket > > need to be twisted in opposite > directions and any soldered joint just fails. > > Any usggestions? > > > > Does any one have some of these and if so how are they > constructed? > > > > Dave Wade > > G4UGM > > > Would you be able to put up some photos of what you have, an > original, and with a ruler included for scale? > > >>> I don't have anything! The last picture on this page shows the > >>> items:- > >>> > >>> http://www.analogmuseum.org/english/collection/eai/tr10/ > >>> > >>> and the plugs on these are standard "4mm" wander plugs, so the part > >> containing the resistor must be about 1" to 1.5" long. There is a 4mm > >> socket in the end and either a 1k or 10k resistor. > >>> Dave > >> Ah, ok, now I get it. Could you use two of the banana jack barrels, > >> cut in half (machine them would be better) so that they can be > >> contrarotated, then superglue or solvent glue the seam when tightened > against eachother? > > If I cut them with a saw I end up with a gap. SuperGlue does not gap fill. I > am kind of leaning towards casting resin > > > >> Steve. > > > > > Actually, super glue does gap fill. Use the thick stuff and sprinkle baking soda > on the glue after applying. It will set rock hard instantly. > The plastic model crowd use this for gap filling instead of putty sometimes. That the stuff they call Gorilla Glue or is that something else? > > Jonas
Nuts & Volts ESR Meter
FYI, the January 2016 issue of Nuts & Volts magazine has an ESR meter. It uses a 1ma panel meter, but of course one could substitute a resistor and use a voltmeter or a multi-meter with a 1ma scale as well. http://www.nutsvolts.com/magazine (Though I see the January issue is not there yet). It also looks like one can get a 3 month complementary subscription via the URL http://nutsvolts.texterity.com/nutsvolts . The digital edition is well worth subscribing. Better yet, if you subscribe for at least 1 year you can be on their "Preferred Subscriber Network" (no extra charge - just a check-box when you subscribe) which gives you access to *all* the "digital archived" (which I found to be PDFs) issues !! (BTW, Everyday Practical Electronics, EPE, lost me as a subscriber when they did away with ordinary PDFs and instead have this odd locked thing with a plug-in. I refuse to subscribe to an online edition of a magazine where I cannot be assured of permanent access to the issues I paid for! I don't find their "EPE PDF" version with its plug-in to be acceptable. I seem to recall that they restricted printing such that one could not simply print it to a PDF either. Too bad.). JRJ
Re: Piggybacking 74LS logic chips to confirm a suspected fault
On 22/12/2015 20:50, "Terry Stewart" wrote: > Hi, > > I've written up my recent third Apple II repair, this time an Apple IIe. > http://www.classic-computers.org.nz/blog/2015-12-22-appleiIIe-no-video.htm > > One interesting aspect of this repair is that piggy-backing a logic chip > helped confirm a faulty one. I'd only ever used this technique with RAM. > I'm sure it only works if the chip has a particular type of fault, but it > worked this time for me. > > Terry (Tez) I did this last night with my latest PET-under-repair, in this case an 8032-SK that I bought 15 years ago and am only just getting round to fixing now. I wasn't getting any display but the video pins LOOKED ok, I could see the flashing cursor on pin 1 for example. Shortly before giving up for the night I remembered a post elsewhere that said if the H signal wasn't spot on 20Hz the monitor wouldn't get any HV so I put my logic analyser on the 74LS86 that does the output to the video pins and one pin was stuck low. Piggybacked another one over the top and I got a display... -- Adrian/Witchy Binary Dinosaurs creator/curator Www.binarydinosaurs.co.uk - the UK's biggest private home computer collection?
Re: XY11 Manual, Anyone?
Original Message Subject: XY11 Manual, Anyone? From:"Mattis Lind" Date:Wed, December 23, 2015 2:53 am To: "General Discussion: On-Topic and Off-Topic Posts" -- > I have in mind to connect a machine to an IBM 1627 (CALCOMP 565) plotter > and then the XY11 which just arrive would fit nicely, I think. > > But I cannot seem to find any manual for the XY11. Anyone know of a manual? > > The board is rather simple so it should be possible to work out the details > on how to interface it by hand but it would be nice to have the proper > manual. > > Then for software I found a diagnostic, XXYAD0 that supposedly should draw > a square and a rectangle. > > Anyone know of other drawing software that uses the XY11 > > /Mattis The book 'The Minicomputer in the Laboratory' by James W Cooper covers using an X-Y plotter with an 11/05, and has assembly listings and a whole bunch of related stuff about scientific plotting. Also a lot of info on using the LPS-11 too. There are plenty of copies out there and quite cheap too. It's an excellent book and could be of use to you. Steve.
Re: Nuts & Volts ESR Meter
Ok.. On Tue, Dec 22, 2015 at 4:17 PM, Jay Jaeger wrote: > FYI, the January 2016 issue of Nuts & Volts magazine has an ESR > meter. (...) > > (Though I see the January issue is not there yet). > So then what's the point of sending the link if the interesting content isn't actually present?? ;-p Not trying to be the arse, but seriously..?
Re: Nuts & Volts ESR Meter
On 12/22/2015 9:06 PM, drlegendre . wrote: > Ok.. > > On Tue, Dec 22, 2015 at 4:17 PM, Jay Jaeger wrote: > >> FYI, the January 2016 issue of Nuts & Volts magazine has an ESR >> meter. (...) >> >> (Though I see the January issue is not there yet). >> > > So then what's the point of sending the link if the interesting content > isn't actually present?? ;-p > > Not trying to be the arse, but seriously..? > Well, I'm VEY Sorry. NOT. Sheesh. It will, presumably, be there very soon, since I got my paper copy just yesterday. It isn't like I am connected to the magazine, wrote the article, or anything like that. I happened to think of it today, and this week being a celebratory week, I might not get the chance later (or remember). Maybe next time I just won't bother. This group is wayy to eager to pick on folks for this or that. JRJ
Re: Nuts & Volts ESR Meter
Jay, I can certainly appreciate your enthusiasm.. but for some reason, I found it particularly (and oddly) funny that someone would post a link to "Hey, this really cool thing would be here - if it were, in fact, here - but it isn't". Now don't take +me+ so seriously, then, eh? It's all in good humor. On Tue, Dec 22, 2015 at 9:26 PM, Jay Jaeger wrote: > On 12/22/2015 9:06 PM, drlegendre . wrote: > > Ok.. > > > > On Tue, Dec 22, 2015 at 4:17 PM, Jay Jaeger wrote: > > > >> FYI, the January 2016 issue of Nuts & Volts magazine has an ESR > >> meter. (...) > >> > >> (Though I see the January issue is not there yet). > >> > > > > So then what's the point of sending the link if the interesting content > > isn't actually present?? ;-p > > > > Not trying to be the arse, but seriously..? > > > > Well, I'm VEY Sorry. NOT. Sheesh. > > It will, presumably, be there very soon, since I got my paper copy just > yesterday. It isn't like I am connected to the magazine, wrote the > article, or anything like that. I happened to think of it today, and > this week being a celebratory week, I might not get the chance later (or > remember). > > Maybe next time I just won't bother. This group is wayy to > eager to pick on folks for this or that. > > JRJ >
Re: XY11 Manual, Anyone?
I had the large ibm calcomp plotter if big wide one we have the same ... it is in the hp display case at smecc museum there was a fortran graphics text book we had adn I had gotten with a HP 3000 and it had a interface board ( parallel interface?? too many years) I made it plot squares etc .. as I remember the hp intrinsics may have had some support for this.. once I did that i put it aside and went back to playing with the HP multi-pen HP plotters we sold back them at Computer Exchange Inc. In a message dated 12/22/2015 3:22:01 P.M. US Mountain Standard Time, ste...@malikoff.com writes: Original Message Subject: XY11 Manual, Anyone? From: "Mattis Lind" Date:Wed, December 23, 2015 2:53 am To: "General Discussion: On-Topic and Off-Topic Posts" -- > I have in mind to connect a machine to an IBM 1627 (CALCOMP 565) plotter > and then the XY11 which just arrive would fit nicely, I think. > > But I cannot seem to find any manual for the XY11. Anyone know of a manual? > > The board is rather simple so it should be possible to work out the details > on how to interface it by hand but it would be nice to have the proper > manual. > > Then for software I found a diagnostic, XXYAD0 that supposedly should draw > a square and a rectangle. > > Anyone know of other drawing software that uses the XY11 > > /Mattis The book 'The Minicomputer in the Laboratory' by James W Cooper covers using an X-Y plotter with an 11/05, and has assembly listings and a whole bunch of related stuff about scientific plotting. Also a lot of info on using the LPS-11 too. There are plenty of copies out there and quite cheap too. It's an excellent book and could be of use to you. Steve.
An IBM I/O Selectric interface using TTL and a 2708 EPROM
Back in the late 70s early 80s one of Dad's work colleagues came up with this circuit for interfacing an IBM I/O Selectric to a microcomputer. We had one, which we planned to use with our Fairchild/Mostek F8 development board, but it never got done - my brother and I wanted a computer with a screen, not a printer! So we spent our pocket money (and Dad's too) on an S-100 kit system, but that's another story. Recently I found the only remains of our I/O writer, the platen. Sadly I think it must have been junked, the platen being kept to roll out photographic prints in Dad's darkroom. I just finished scanning, cleaning up the degradation and turning the circuit into a PDF. These days an Arduino or RasPi would be a simpler and more flexible way to go, but I hope you find it interesting looking at how it was done with TTL and discrete components. The circuit was designed by (I believe) Neil Taylor, possibly with the help of Derek Williamson, both brilliant IBM Australia CE's. I know my dad always spoke very highly of them. It's an 8-page PDF at http://web.aanet.com.au/~malikoff/misc/IBM_IO_Selectric_interface.pdf Regards, Steve Malikoff.
