Re: tu58fs - PDP-11 file sharing with TU58 tape emulator

On Fri, Jan 20, 2017 at 8:51 PM, Jörg Hoppe wrote: > > If you like to have a look (and play beta tester): > > Docs on http://retrocmp.com/tools/tu58fs > C sources and makefile on https://github.com/j-hoppe/tu58fs FWIW, It doesn't compile on FreeBSD (yes, I do not know if it

Re: Transformer part ID please

On Mon, Jan 23, 2017 at 11:38 PM, Adrian Graham wrote: > On 23/01/2017 21:38, "Tony Duell" wrote: >> Oh... The trace isn't open-circuit, is it? Check it with the >> multimeter. Given the >> corrosion damage to the tape drive I could well

Re: IBM 7074 and then some: "Systems we love" conference

On 01/23/2017 09:42 PM, Jon Elson wrote: > On 01/23/2017 07:45 PM, Jon Elson wrote: > > This blog seems to indicate that there is NO 7074, but an emulator > running on 370 hardware. >> http://nikhilism.com/post/2016/systems-we-love/ > > This makes a lot more sense, some of these microcode

Re: IBM 7074 and then some: "Systems we love" conference

Bob Bener has written a short squib about how the 7070 came into being: http://www.bobbemer.com/BIRTH.HTM Funny, in a tragic way. --Chuck

Re: IBM 7074 and then some: "Systems we love" conference

On 01/23/2017 07:45 PM, Jon Elson wrote: This blog seems to indicate that there is NO 7074, but an emulator running on 370 hardware. http://nikhilism.com/post/2016/systems-we-love/ This makes a lot more sense, some of these microcode emulations were still available of fairly late machines.

Re: IBM 7074 and then some: "Systems we love" conference

On 01/23/2017 09:21 PM, Jon Elson wrote: > Oh, and the picture in the article is CLEARLY a posed IBM sales > brochure photo, and not from the recent operation at the unnamed > government agency. The photo's from Wikipedia, and is a photo of the system at the Deutsches Museum in Munich, which is

Re: IBM 7074 and then some: "Systems we love" conference

On 01/23/2017 09:04 PM, Chuck Guzis wrote: On 01/23/2017 05:45 PM, Jon Elson wrote: WOW That is QUITE amazing! And, I can't possibly imagine why anyone in their right mind would do this! Seems an emulator on a PC would be faster, and way more reliable, not to mention taking up MUCH less

Re: IBM 7074 and then some: "Systems we love" conference

On 01/23/2017 05:45 PM, Jon Elson wrote: > WOW That is QUITE amazing! And, I can't possibly imagine why > anyone in their right mind would do this! Seems an emulator on a PC > would be faster, and way more reliable, not to mention taking up MUCH > less space, power and cooling. How

Re: IBM 7074 and then some: "Systems we love" conference

On 01/23/2017 01:00 PM, Steven Maresca wrote: Just wanted to share an excerpted story just sent to me by a colleague, regarding an IBM 7074 supplying data to Java middleware, ultimately feeding a modern webapp stack: http://thenewstack.io/happens-use-java-1960-ibm-mainframe/ This comes from a

Re: Parallel computation

> On Jan 23, 2017, at 5:09 PM, Toby Thain wrote: > > On 2017-01-23 6:55 PM, Paul Koning wrote: >> >>> On Jan 23, 2017, at 3:52 PM, Chuck Guzis wrote: >>> >>> ... >>> It's just that I bridle a bit when hearing the young 'uns refer to any >>>

Re: Transformer part ID please

On 23/01/2017 21:38, "Tony Duell" wrote: > I normally trace connections using my DMM, but of course you have to know > what will fool it (i.e. low resistance components). I find I have to desolder > relays, switches, inductors, transformers, low value resistors, etc before

David Gelernter - was Re: IBM 7074 and then some: "Systems we love" conference

On 2017-01-23 6:52 PM, Chuck Guzis wrote: On 01/23/2017 12:25 PM, Paul Koning wrote: On Jan 23, 2017, at 2:16 PM, Chuck Guzis wrote: On 01/23/2017 11:00 AM, Steven Maresca wrote: Just wanted to share an excerpted story just sent to me by a colleague, regarding an IBM 7074

Re: Parallel computation

On 2017-01-23 6:55 PM, Paul Koning wrote: On Jan 23, 2017, at 3:52 PM, Chuck Guzis wrote: ... It's just that I bridle a bit when hearing the young 'uns refer to any physically large machine as a "supercomputer". It's the same feeling that I get when I see press releases

RE: IBM 7074 and then some: "Systems we love" conference

Oh, no. Of course not. Perish the thought. Sent from my Windows 10 phone From: Toby Thain Sent: Monday, January 23, 2017 12:45 PM To: cctalk@classiccmp.org Subject: Re: IBM 7074 and then some: "Systems we love" conference On 2017-01-23 5:16 PM, Chuck Guzis wrote: > On 01/23/2017 11:00 AM,

Books available

Clearing out a bunch of stuff I have decided I no longer need around. There may not be any interest here but thought I'd check first. I have several books available for the cost of shipping if anyone is interested, otherwise they'll go to my local book reseller this coming weekend.  All are in

Re: Transformer part ID please

On Mon, Jan 23, 2017 at 9:23 PM, Adrian Graham wrote: > On 23/01/2017 19:07, "Tony Duell" wrote: > >>> I didn't think of a 555 in that scenario but that makes sense. I've marked >>> it as such for now, cheers! >> >> Is there another capacitor

Re: Transformer part ID please

On 23/01/2017 19:07, "Tony Duell" wrote: >> I didn't think of a 555 in that scenario but that makes sense. I've marked >> it as such for now, cheers! > > Is there another capacitor from the 2/6 junction to chassis? Any other > components > around? It might be one of the

Parallel computation (was: IBM 7074 and then some)

> On Jan 23, 2017, at 3:52 PM, Chuck Guzis wrote: > > ... > It's just that I bridle a bit when hearing the young 'uns refer to any > physically large machine as a "supercomputer". > > It's the same feeling that I get when I see press releases today that > relate that David

Re: IBM 7074 and then some: "Systems we love" conference

On Mon, Jan 23, 2017 at 12:33 PM, Mouse wrote: > >> The 7074 was referred to as a "supercomputer". Can any decimal > >> machine really bear that title? > > I suppose it could. I would apply the term to a computer that's the > fastest$ > > Consider Babbage's

Re: IBM 7074 and then some: "Systems we love" conference

>> The 7074 was referred to as a "supercomputer". Can any decimal >> machine really bear that title? > I suppose it could. I would apply the term to a computer that's the fastest$ Consider Babbage's Analytical Engine. It was decimal and it was, not so much by intrinsic merit as by lack of

Re: IBM 7074 and then some: "Systems we love" conference

> On Jan 23, 2017, at 2:16 PM, Chuck Guzis wrote: > > On 01/23/2017 11:00 AM, Steven Maresca wrote: >> Just wanted to share an excerpted story just sent to me by a >> colleague, regarding an IBM 7074 supplying data to Java middleware, >> ultimately feeding a modern webapp

Re: IBM 7074 and then some: "Systems we love" conference

On 2017-01-23 5:16 PM, Chuck Guzis wrote: On 01/23/2017 11:00 AM, Steven Maresca wrote: Just wanted to share an excerpted story just sent to me by a colleague, regarding an IBM 7074 supplying data to Java middleware, ultimately feeding a modern webapp stack:

Re: DS12887 pcb substitute with battery

On 01/23/2017 09:04 AM, Jon Elson wrote: > Well, it doesn't really matter. If you can find one of the "really > old" ones, the battery can be replaced and you are good for 5 years > or so. There must be TONS of these old clock/RAM chips out there, and > somebody must have saved a few. Probably

Re: IBM 7074 and then some: "Systems we love" conference

On 01/23/2017 11:00 AM, Steven Maresca wrote: > Just wanted to share an excerpted story just sent to me by a > colleague, regarding an IBM 7074 supplying data to Java middleware, > ultimately feeding a modern webapp stack: > http://thenewstack.io/happens-use-java-1960-ibm-mainframe/ The 7074 was

Re: Transformer part ID please

On Mon, Jan 23, 2017 at 6:48 PM, Adrian Graham wrote: > On 22/01/2017 20:10, "Tony Duell" wrote: > >>> That looks like an opamp to me, with bias pins connected to GND? >> >> Does it? It looks like a 555 timer to me at first glance. I would

IBM 7074 and then some: "Systems we love" conference

Just wanted to share an excerpted story just sent to me by a colleague, regarding an IBM 7074 supplying data to Java middleware, ultimately feeding a modern webapp stack: http://thenewstack.io/happens-use-java-1960-ibm-mainframe/ This comes from a conference which occurred last month titled

Re: DS12887 pcb substitute with battery

On 01/23/2017 04:57 AM, allison wrote: On 01/22/2017 02:46 PM, Chuck Guzis wrote: On 01/22/2017 10:57 AM, allison wrote: I don't know about most people but this solution has been around for decades. I locate the battery on the failed part with a small magnet, then grind the epoxy down to it

Re: Transformer part ID please

On 22/01/2017 20:10, "Tony Duell" wrote: >> That looks like an opamp to me, with bias pins connected to GND? > > Does it? It looks like a 555 timer to me at first glance. I would have > expected another > capacitor from pins 2/6 to ground though. > > 1 Ground > 2 Trigger

Re: Attempt at Compaq keybord swap with a PC keyboard (failed)

On 01/23/2017 09:36 AM, Josh Dersch wrote: > Just to be sure -- the PC keyboard you're using is an actual PC/XT > compatible keyboard, not an AT, correct? The PC/XT used a different > protocol and is incompatible with later keyboards... That occurred to me also--it seems so obvious that I

Re: Attempt at Compaq keybord swap with a PC keyboard (failed)

Just to be sure -- the PC keyboard you're using is an actual PC/XT compatible keyboard, not an AT, correct? The PC/XT used a different protocol and is incompatible with later keyboards... - Josh On 1/23/17 8:53 AM, Randy Dawson wrote: Hi William, I did use the original kybd to trace out

Re: Altair

Haha! Let me know and we'll crack a deal :) On Sun, Jan 22, 2017 at 10:04 PM, Brad H < vintagecompu...@bettercomputing.net> wrote: > Yes. That remains an item on my hit list. > > -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Sellam > Ismail >

Re: Attempt at Compaq keybord swap with a PC keyboard (failed)

Hi William, I did use the original kybd to trace out the clock and data, most of the keys work, and I have good scope shots. I am on it again today, because it sure seems like it should work, using a PC keyboard. I did not take scope shots on the first test, thinking it should just work.

WTB: Display for my VAXStations

Hi Folks, I search for a working original DEC Display for my VAXStation (4000/90 & 4000/60) like the VRT16 or VRT19. Anyone here, who is interested to let one go, to have more free space? ;-) Please only offers from Germany in the near (200km) of Frankfurt am Main, as shipping would not be

Re: Attempt at Compaq keybord swap with a PC keyboard (failed)

Easier to fix the foam. But a tip to replace the keyboard...use the Compaq keyboard bare by pressing fingers directly on the board, verify that works that way (it should). Record the signals' wire path, match the replacement keyboard wiring. B On Jan 23, 2017 12:45 AM, "Randy Dawson"

Re: A new life for my LA180.

My rt11 sends printer output to a lpt.txt. I have not done much more regarding printing than that. I have an LA180 with serial for my actual pdp8e. B Bill Degnan twitter: billdeg vintagecomputer.net

Re: DS12887 pcb substitute with battery

On 01/22/2017 02:46 PM, Chuck Guzis wrote: > On 01/22/2017 10:57 AM, allison wrote: >> I don't know about most people but this solution has been around for >> decades. >> >> I locate the battery on the failed part with a small magnet, then >> grind the epoxy down to it then pick it out with a