[cctalk] Re: oscilloscopes

On 2024-04-06 9:40 a.m., Phil Budne via cctalk wrote: Paul Koning wrote: Yes, and some emulations have done this, such as Phil Budne's famous work in SIMH. Famous?? I'm famous???!!! To be fair, I started with Douglas W. Jones' PDP8 Emulator. Which reminds me of: If I have seen

[cctalk] Re: oscilloscopes

> On Apr 6, 2024, at 11:40 AM, Phil Budne via cctalk > wrote: > > Paul Koning wrote: > >> Yes, and some emulations have done this, such as Phil Budne's famous work in >> SIMH. > > Famous?? I'm famous???!!! > > To be fair, I started with Douglas W. Jones' PDP8 Emulator. > > Which

[cctalk] Re: oscilloscopes

A little digging later ... I implemented the waterfall display eight years ago, outputing to a 1280 x 1024 monitor. 1920 x 1080 was supported, but I was outputing 1 Ki pt FFTs. The hardware platform was a Xilinx Zynq. An indication of 4k video capabilities is

[cctalk] Re: oscilloscopes

I too have experimented with OpenGL to simulate phosphor-decay. I never got to a satisfactory solution. The learning curve for OpenGL is steep. On Sun, Apr 7, 2024 at 4:43 PM Lars Brinkhoff via cctalk < cctalk@classiccmp.org> wrote: > Phil Budne wrote: > > I wrote and tuned the code twenty

[cctalk] Re: oscilloscopes

Phil Budne wrote: > I wrote and tuned the code twenty years ago, but haven't looked at > whether better results might be possible by wasting the capabilities > of current systems (SIMD libaries and/or multiple cores). I felt like > I only was able to give a slim impression, and I've also wondered

[cctalk] Re: oscilloscopes

Paul Koning wrote: > Yes, and some emulations have done this, such as Phil Budne's famous work in > SIMH. Famous?? I'm famous???!!! To be fair, I started with Douglas W. Jones' PDP8 Emulator. Which reminds me of: If I have seen farther than others, it is because I was standing on the

[cctalk] Re: oscilloscopes

> > > > >> Found it (on paper): "Generating characters" by Kenneth Perry and > >> Everett Aho, > Electronics, Jan 3, 1958, pp. 72-75. > > > >> Bitsavers has it in the MIT/LincolnLaboratory section: >

[cctalk] Re: oscilloscopes

This one: https://scopeclock.com/ You can see the connected arcs in the pic on the main page. I built an older model years ago and it is still running... --tom On 4/4/24 15:21, Adrian Godwin via cctalk wrote: On Thu, Apr 4, 2024 at 8:36 PM Paul Koning via cctalk wrote:

[cctalk] Re: oscilloscopes

On Thu, Apr 4, 2024 at 8:36 PM Paul Koning via cctalk wrote: > > > >> https://scopeclock.com/ > > Technically, the scopeClock is generating neither curves nor vectors, > it's generating pixels in an XY display - it's just that they’re of fine > enough resolution and

[cctalk] Re: oscilloscopes

> On Apr 4, 2024, at 3:12 PM, Brent Hilpert via cctalk > wrote: > >> On 2024Apr 4,, at 7:22 AM, Adrian Godwin via cctalk >> wrote: >> >> This 'scope clock also uses circle generators rather than vectors to >> produce well-formed characters. It mentions a Teensy controller so I don't >>

[cctalk] Re: oscilloscopes

> On 2024Apr 4,, at 7:22 AM, Adrian Godwin via cctalk > wrote: > > This 'scope clock also uses circle generators rather than vectors to > produce well-formed characters. It mentions a Teensy controller so I don't > think it's the original made in this way - the first I heard of was too > long

[cctalk] Re: oscilloscopes

This 'scope clock also uses circle generators rather than vectors to produce well-formed characters. It mentions a Teensy controller so I don't think it's the original made in this way - the first I heard of was too long ago for that. But I don't know if it's an update or a separate design.

[cctalk] Re: oscilloscopes

> On Apr 3, 2024, at 6:32 PM, Rick Bensene wrote: > > I wrote: > >>> The digits are among the nicest looking digits that I've ever seen >>> on a CRT display, including those on the CDC scopes as well as IBM >> >>> console displays. > > To which Paul responded: > >> I have, somewhere, a

[cctalk] Re: oscilloscopes

I wrote: >> The digits are among the nicest looking digits that I've ever seen >> on a CRT display, including those on the CDC scopes as well as IBM >> >> console displays. To which Paul responded: > I have, somewhere, a copy of a paper that describes analog circuits > for > generating

[cctalk] Re: oscilloscopes

> On Apr 3, 2024, at 2:20 PM, Paul Koning via cctalk > wrote: > > > >> On Apr 3, 2024, at 1:49 PM, Rick Bensene via cctalk >> wrote: >> >> ... >> Even with only having to render the digits zero through nine and a decimal >> point (the calculator didn't support negative numbers; they

[cctalk] Re: oscilloscopes

> On Apr 3, 2024, at 1:49 PM, Rick Bensene via cctalk > wrote: > > ... > Even with only having to render the digits zero through nine and a decimal > point (the calculator didn't support negative numbers; they were represented > using tens complement form), the display generator also used

[cctalk] Re: oscilloscopes

For some reason the mailing list deleted the link to the photo, I'm sorry. On 4/3/2024 11:01 AM, Mike Katz via cctalk wrote: I still have a TEK 475A (with the DMM4 on top) and a TEK 11043A mainframe scope. The 475A is rock solid and is one of the best analog triggering scopes ever made.  The

[cctalk] Re: oscilloscopes

On 4/3/24 09:01, Mike Katz via cctalk wrote: > I still have a TEK 475A (with the DMM4 on top) and a TEK 11043A > mainframe scope. I still occasionally haul out my 465A. If I got rid of it, I'd have to figure out what to do with the scope cart... --Chuck

[cctalk] Re: oscilloscopes

Paul wrote: > The DD60 and its associated controller in the mainframe (6612 or 6602) was an > > interesting beast. The interface between controller and display is a > hybrid, > with the positioning information delivered as 9 bits each of X and > Y, but the > character vectors are generated in

[cctalk] Re: oscilloscopes

I still have a TEK 475A (with the DMM4 on top) and a TEK 11043A mainframe scope. The 475A is rock solid and is one of the best analog triggering scopes ever made.  The 11403A goes all the way up to 3GHz but, tbh, is was a difficult to use touch screen scope.  I still use both of them

[cctalk] Re: oscilloscopes

> On Apr 3, 2024, at 12:28 PM, Martin Bishop via cctalk > wrote: > > Ignore my last - incontinence or is it incompetence > > A fairly ordinary GPU, in a PC, could almost certainly provide an XY display > with Z fade (long persistance phosphor). I use them for waterfall displays > and

[cctalk] Re: oscilloscopes

I still have a TEK 475A (with the DMM4 on top) and a TEK 11043A mainframe scope. The 475A is rock solid and is one of the best analog triggering scopes ever made.  The 11403A goes all the way up to 3GHz but, tbh, is was a difficult to use touch screen scope.  I still use both of them

[cctalk] Re: oscilloscopes

in either processor (vector instructions) or logic (raw muscle). The DAC input lines could supply the data. Martin -Original Message- From: Guy Fedorkow via cctalk [mailto:cctalk@classiccmp.org] Sent: 03 April 2024 16:02 To: cctalk@classiccmp.org Cc: Guy Fedorkow Subject: [cctalk] Re

[cctalk] Re: oscilloscopes

rfgh -Original Message- From: Guy Fedorkow via cctalk [mailto:cctalk@classiccmp.org] Sent: 03 April 2024 16:02 To: cctalk@classiccmp.org Cc: Guy Fedorkow Subject: [cctalk] Re: oscilloscopes Vintage computer enthusiasts might want to keep track of where to find CRT-based analog

[cctalk] Re: oscilloscopes

I have a pair of CDC6600 console CRTs (~12" diameter electrostatic deflection vector), I've been working on "restoring" a console which I salvaged from Purdue surplus many years ago, but have kind of stalled on at present and it takes up a significant amount of space. If someone would like to

[cctalk] Re: oscilloscopes

> On Apr 3, 2024, at 11:21 AM, Mike Katz via cctalk > wrote: > > I'm surprised some digital scope manufacturer hasn't implemented X-Y-Z > control as an option. Driving X-Y was fairly common for certain types of > signals. And many also used the Z input. Oh, they offer X/Y display, but

[cctalk] Re: oscilloscopes

> On Apr 3, 2024, at 11:16 AM, Paul Koning via cctalk > wrote: > > > >> On Apr 3, 2024, at 11:01 AM, Guy Fedorkow via cctalk >> wrote: >> >> Vintage computer enthusiasts might want to keep track of where to find >> CRT-based analog oscilloscopes, for use as output devices. >> The early

[cctalk] Re: oscilloscopes

I'm surprised some digital scope manufacturer hasn't implemented X-Y-Z control as an option.   Driving X-Y was fairly common for certain types of signals.  And many also used the Z input. Back in the day there were many companies that made X-Y or X-Y-Z displays. On 4/3/2024 10:01 AM, Guy

[cctalk] Re: oscilloscopes

DEC used Tektronix R503 scopes for a display on many of their early machines. On Wed, Apr 3, 2024 at 11:16 AM Paul Koning via cctalk < cctalk@classiccmp.org> wrote: > > > > On Apr 3, 2024, at 11:01 AM, Guy Fedorkow via cctalk < > cctalk@classiccmp.org> wrote: > > > > Vintage computer enthusiasts

[cctalk] Re: oscilloscopes

> On Apr 3, 2024, at 11:01 AM, Guy Fedorkow via cctalk > wrote: > > Vintage computer enthusiasts might want to keep track of where to find > CRT-based analog oscilloscopes, for use as output devices. > The early MIT and Lincoln Labs computers used D/A converters to steer and > activate the

[cctalk] Re: oscilloscopes

Vintage computer enthusiasts might want to keep track of where to find CRT-based analog oscilloscopes, for use as output devices. The early MIT and Lincoln Labs computers used D/A converters to steer and activate the beam on analog scopes to draw vector images. Working on Whirlwind simulation,

[cctalk] Re: oscilloscopes

I still have a TEK 475A (with the DMM4 on top) and a TEK 11043A mainframe scope. The 475A is rock solid and is one of the best analog triggering scopes ever made.  The 11403A goes all the way up to 3GHz but, tbh, is was a difficult to use touch screen scope.  I still use both of them

[cctalk] Re: oscilloscopes

I used to have a Tek 453(?) that was really nice. I sold it when I got a Tek 7201(?) 1Ghz model. I recently sold it. I hated getting rid of it but it was big enough to be used as a small desk and weighed more than my back could handle any more. I still have a 561A that I've been meaning to

[cctalk] Re: oscilloscopes

> On Apr 1, 2024, at 8:14 PM, Brent Hilpert via cctalk > wrote: > > On 2024Apr 1,, at 3:33 PM, Just Kant via cctalk wrote: >> >> I have more then I need. All the working ones are HP w/color crts, and as >> far as older, verifiably vintage tools (right down to the 680x0 processor in >>

[cctalk] Re: oscilloscopes

On 2024Apr 1,, at 3:33 PM, Just Kant via cctalk wrote: > > I have more then I need. All the working ones are HP w/color crts, and as far > as older, verifiably vintage tools (right down to the 680x0 processor in > either) I have to admit I favor them as a brand. Call we an oddball, weird >

[cctalk] Re: oscilloscopes

> On Apr 1, 2024, at 8:09 PM, Bill Gunshannon via cctalk > wrote: > > > On 4/1/2024 7:12 PM, Rick Bensene via cctalk wrote: And still works! Built to withstand an atomic bombardment. >> Except for the EMP. It'll theoretically render such devices nice looking, >> well-built scrap. >>

[cctalk] Re: oscilloscopes

On 4/1/2024 7:12 PM, Rick Bensene via cctalk wrote: And still works! Built to withstand an atomic bombardment. Except for the EMP. It'll theoretically render such devices nice looking, well-built scrap. The old completely vacuum-tube-based, discrete component oscilloscope from back in

[cctalk] Re: oscilloscopes

On 4/1/2024 6:56 PM, Fred Cisin via cctalk wrote: On Mon, 1 Apr 2024, Just Kant via cctalk wrote: I have more then I need. All the working ones are HP w/color crts, and as far as older, verifiably vintage tools (right down to the 680x0 processor in either) I have to admit I favor them as a

[cctalk] Re: oscilloscopes

I have 2 of the Non-Linear Systems (NLS) oscilloscopes that you speak of. Still working Sent from my iPhone > On Apr 1, 2024, at 16:21, Rick Bensene via cctalk > wrote: > >  >> >>> And still works! Built to withstand an atomic bombardment. > > Except for the EMP. It'll theoretically

[cctalk] Re: oscilloscopes

>> And still works! Built to withstand an atomic bombardment. Except for the EMP. It'll theoretically render such devices nice looking, well-built scrap. The old completely vacuum-tube-based, discrete component oscilloscope from back in the day may actually survive such an event if it's

[cctalk] Re: oscilloscopes

On Mon, 1 Apr 2024, Just Kant via cctalk wrote: I have more then I need. All the working ones are HP w/color crts, and as far as older, verifiably vintage tools (right down to the 680x0 processor in either) I have to admit I favor them as a brand. Call we an oddball, weird egg, badges I wear