Re: Image de-warping tool, and Multics/GCOS panels

Noeal asked: > I'm having an issue with the images, though: taking a picture of a flat, > rectangular panel with a camera usually produces distortion (even with the > lens set to the narrowest angle possible). > > Does anyone know of any freeware which will fix this? The image tool I > normally

Vintage Computer Calendar 2018

Hey folks; The Personal Computer Museum (http://www.pcmuseum.ca) is offering a beautiful 2018 vintage computer calendar as a fundraiser. The calendars are in hand and the cost is $20 Canadian (no tax). The shipping rates (in CAD) are $3.50 within Canada, $5.00 to the U.S. and $10.50 to the rest

Re: Which Dec Emulation is the MOST useful and Versatile?

On 10/27/2017 04:55 PM, Mike Stein via cctalk wrote: > Or Burroughs' core counters (think I still have some somewhere): > > https://www.google.com/patents/US3438014 > > http://www.freepatentsonline.com/2995663.html We forget about all of the alternative ways of implementing digital logic. At

Re: Image de-warping tool, and Multics/GCOS panels

On Fri, Oct 27, 2017 at 8:30 AM, Noel Chiappa via cctalk < cctalk@classiccmp.org> wrote: > > > Does anyone know of any freeware which will fix this? The image tool I > normally use (ImagePals, sort of a poor man's Photoshop) does have a 'warp' > function, but it requires setting up a grid of

Re: Which Dec Emulation is the MOST useful and Versatile?

- Original Message - From: "Chuck Guzis via cctalk" To: Sent: Friday, October 27, 2017 5:05 PM Subject: Re: Which Dec Emulation is the MOST useful and Versatile? > On 10/27/2017 01:39 PM, Al Kossow via cctalk wrote: >> >> >> On 10/27/17

Re: Which Dec Emulation is the MOST useful and Versatile?

On 10/27/2017 9:27 AM, Jay Jaeger via cctech wrote: With respect to your #5, I have some direct experience with that, and am working on a tricky project to implement the IBM 1410 in a FPGA at the gate level, based on the SMS Automated Logic Diagrams (ALD's). What I have found so far is that a

PDP8.org

Is anyone re-hosting pdp8.org yet? Marc

RE: Which Dec Emulation is the MOST useful and Versatile?

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Chuck > Guzis via cctalk > Sent: 27 October 2017 22:06 > To: cctalk@classiccmp.org > Subject: Re: Which Dec Emulation is the MOST useful and Versatile? > > On 10/27/2017 01:39 PM, Al Kossow via

Re: Which Dec Emulation is the MOST useful and Versatile?

On 10/27/2017 3:54 AM, Dave Wade via cctech wrote: > Kip, > I think "emulation" and "simulation" get used pretty much interchangeable. > SIMH is touted a simulator, Hercules/390 as an emulator yet they are both > programs that provide a "bare metal" machine via software on which an > operating

Re: Which Dec Emulation is the MOST useful and Versatile?

On 10/27/17 2:00 PM, Phil Blundell via cctalk wrote: > On the subject of NMOS dynamic logic, someone recently pointed out a > paragraph in the technical manual for a 1990s ARM2-based computer which > warned of dire consequences, including possibly destruction of the > chipset, if the circuitry

Re: Which Dec Emulation is the MOST useful and Versatile?

On 10/27/2017 01:39 PM, Al Kossow via cctalk wrote: > > > On 10/27/17 12:57 PM, Paul Koning wrote: > >> That doesn't sound even close. > > http://www.ussc90.nl/circ.htm > > > Ferractors. > Can't forget Parametrons: https://www.thocp.net/hardware/parametron.htm

Re: Which Dec Emulation is the MOST useful and Versatile?

On 10/27/2017 1:06 PM, Paul Koning wrote: True if you have a TTL machine. 6600 is discrete transistor, and the actual transistor specs are nowhere to be found as far as I have been able to tell. Well if you can find one loose, you could allways measure it. But that doesn't directly relate

Re: Which Dec Emulation is the MOST useful and Versatile?

On Fri, 2017-10-27 at 13:38 -0700, Brent Hilpert via cctalk wrote: > I wonder if they were just trying to draw an analogy between the > inherent dynamic operation requirements of magnetic logic and the > dynamic operation requirements of some (many?) NMOS designs (not > really inherent to NMOS).

Re: Which Dec Emulation is the MOST useful and Versatile?

On 10/27/2017 01:01 PM, Paul Koning wrote: > Oh yes, and if you look at the wire lists (on Bitsavers) you will get the > length of every wire in the machine. The trouble is that, even if you use > the documented delay per foot, things don't necessarily match. The stated > logic stage delay

Re: Which Dec Emulation is the MOST useful and Versatile?

On 10/27/17 1:38 PM, Brent Hilpert via cctalk wrote: > I wonder if they were just trying to draw an analogy between the inherent > dynamic operation requirements of magnetic logic and the dynamic operation > requirements of some (many?) NMOS designs (not really inherent to NMOS). this was a

Re: Which Dec Emulation is the MOST useful and Versatile?

On 2017-Oct-27, at 12:57 PM, Paul Koning via cctalk wrote: >> On Oct 27, 2017, at 3:21 PM, Al Kossow via cctalk >> wrote: >> On 10/27/17 12:16 PM, Chuck Guzis via cctalk wrote: >> >>> I've long had a fantasy about building a core-logic CPU such as the >>> Univac Solid

Re: Which Dec Emulation is the MOST useful and Versatile?

On 10/27/17 12:57 PM, Paul Koning wrote: > That doesn't sound even close. http://www.ussc90.nl/circ.htm Ferractors. While computers now are composed by many integrated circuits containing each millions of logical units, processing data with a speed of a few gigabits per second in a

Re: Apple II no video display

On Fri, Oct 27, 2017 at 4:13 PM, Brent Hilpert via cctalk wrote: > 74S is faster than 74LS, 74LS was combining low power techniques (which > result in loss of speed) with Schottky technology to get some of the lost > speed back, to get a better speed-power product than

RE: Apple II no video display

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Brent > Hilpert via cctalk > Sent: 27 October 2017 20:53 > To: General Discussion: On-Topic and Off-Topic Posts > > Subject: Re: Apple II no video display > > On 2017-Oct-27,

RE: RK05/BA11 slides

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Noel > Chiappa via cctalk > Sent: 27 October 2017 19:03 > To: cctalk@classiccmp.org > Cc: j...@mercury.lcs.mit.edu > Subject: RE: RK05/BA11 slides > > > From: "Rob Jarratt" > > > I misread

Re: Apple II no video display

On 2017-Oct-27, at 12:13 PM, Ethan Dicks via cctalk wrote: > On Fri, Oct 27, 2017 at 11:40 AM, Dave Wade via cctalk > >> The odd thing is that ic A9 appears to be a 74S151 not a 74LS151. I >> wouldn't expect this to work, but I assume it was working at some point in >> time! > > I don't think

RE: Apple II no video display

> -Original Message- > From: Ethan Dicks [mailto:ethan.di...@gmail.com] > Sent: 27 October 2017 20:14 > To: Dave Wade ; General Discussion: On-Topic > and Off-Topic Posts > Subject: Re: Apple II no video display > > On Fri, Oct 27, 2017 at

Re: Which Dec Emulation is the MOST useful and Versatile?

> On Oct 27, 2017, at 3:21 PM, Al Kossow via cctalk > wrote: > > > > On 10/27/17 12:16 PM, Chuck Guzis via cctalk wrote: > >> I've long had a fantasy about building a core-logic CPU such as the >> Univac Solid State. > > I have been told the behavior of Univac

Re: Apple II no video display

On 2017-Oct-27, at 8:40 AM, Dave Wade via cctalk wrote: > I have an Apple II that produces one beep at power on, but my monitor says > "no video present". A scope on the output shows frame sync but at low > levels. The odd thing is that ic A9 appears to be a 74S151 not a 74LS151. I > wouldn't

Re: Which Dec Emulation is the MOST useful and Versatile?

On 10/27/17 12:16 PM, Chuck Guzis via cctalk wrote: > I've long had a fantasy about building a core-logic CPU such as the > Univac Solid State. I have been told the behavior of Univac magnetic logic was similar to NMOS which explains why there is an RF power amplifier for the clock driver in

Re: Which Dec Emulation is the MOST useful and Versatile?

On 10/27/2017 12:06 PM, Paul Koning via cctalk wrote: > But that doesn't directly relate to gate level emulation. If you > have gate level documentation you can of course build a copy of the > machine out of actual gate-type parts, like 7400 chips. Or you can > write a gate level model in VHDL,

Re: Apple II no video display

On Fri, Oct 27, 2017 at 11:40 AM, Dave Wade via cctalk wrote: > Folks, > > I have an Apple II that produces one beep at power on, but my monitor says > "no video present". A scope on the output shows frame sync but at low > levels. Are you using a vintage CRT or a modern

Re: Which Dec Emulation is the MOST useful and Versatile?

> On Oct 27, 2017, at 2:55 PM, ben via cctalk wrote: > > On 10/27/2017 12:28 PM, Paul Koning via cctalk wrote: > >> It helps to have a machine built with sane design principles. Things like >> RS flops that don't have both inputs active at the same time. And a >>

Re: Which Dec Emulation is the MOST useful and Versatile?

On 2017-Oct-27, at 11:28 AM, Paul Koning via cctalk wrote: > It helps to have a machine built with sane design principles. Things like RS > flops that don't have both inputs active at the same time. And a properly > clocked architecture. Neither of these properties holds for the CDC 6600...

Re: Which Dec Emulation is the MOST useful and Versatile?

On 10/27/2017 12:28 PM, Paul Koning via cctalk wrote: It helps to have a machine built with sane design principles. Things like RS flops that don't have both inputs active at the same time. And a properly clocked architecture. Neither of these properties holds for the CDC 6600...

RE: Contacting the list admin?

Got it covered.

Re: Which Dec Emulation is the MOST useful and Versatile?

> From: Kip Koon > I tend to get emulation and simulation a bit confused. You and me both! I think part of the problem is that there is no generally-agreed-upon definition of the two terms. I like this one a lot, though:

Re: Which Dec Emulation is the MOST useful and Versatile?

On 2017-Oct-27, at 10:27 AM, Paul Koning via cctalk wrote: > So it's a question of what you're after. If you want to run the software, or > teach the machine at the programmer level, SIMH or equivalent is quite > adequate. If you want to teach FPGA skills, an FPGA behavioral model > emulation

Re: Which Dec Emulation is the MOST useful and Versatile?

> On Oct 27, 2017, at 1:47 PM, Rob Jarratt wrote: > > If I had the skill, data and time, I would always go for a gate level model. > However, I do most (sim/em)ulation in SIMH instead, like I have been doing > for MU5 where I lack the data and the time and probably

RE: RK05/BA11 slides

> From: "Rob Jarratt" > I misread your email as suggesting that the 124 was more suitable than > the 122 No, it's just cheaper (at the moment), and can be made to work. > My H960 is not very accessible but I attempted to measure it front back > and it may be 25". Do you know

RE: Which Dec Emulation is the MOST useful and Versatile?

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Paul Koning > via cctalk > Sent: 27 October 2017 18:28 > To: Dave Wade ; General Discussion: On-Topic and > Off-Topic Posts > Subject: Re: Which Dec

RE: RK05/BA11 slides

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Noel > Chiappa via cctalk > Sent: 27 October 2017 18:25 > To: cctalk@classiccmp.org > Cc: j...@mercury.lcs.mit.edu > Subject: RE: RK05/BA11 slides > > > From: "Rob Jarratt" > > > Thanks for

Re: Which Dec Emulation is the MOST useful and Versatile?

> On Oct 27, 2017, at 4:54 AM, Dave Wade via cctalk > wrote: > > Kip, > I think "emulation" and "simulation" get used pretty much interchangeable. > SIMH is touted a simulator, Hercules/390 as an emulator yet they are both > programs that provide a "bare metal" machine

RE: RK05/BA11 slides

> From: "Rob Jarratt" > Thanks for this info Noel. Sure; I figured it would be useful to someone, glad to know it was. > So it sounds like I would need the C-230-S-124. ... My metalworking > abilities are limited. If you don't want to have to do any mods, the C-230-S-122 is a

Contacting the list admin?

Hello, I've been trying to unsubscribe from the list. I did it once before and hadn't seen anything for months. However, I suddenly started receiving mails last weekend. I went to the webpage to unsubscribe but I can't login and neither the password reset or unsubscribe confirmation make it to

RE: RK05/BA11 slides

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Noel > Chiappa via cctalk > Sent: 27 October 2017 15:14 > To: cctalk@classiccmp.org > Cc: j...@mercury.lcs.mit.edu > Subject: RK05/BA11 slides > > So, you have an RK05 drive, but you're missing the

Re: Image de-warping tool, and Multics/GCOS panels

I move it to my android device. CS Scanner application will let you do that easily.  add it to a cs scan document, then save that doc as a image (jpg) file. Convoluted, but actually less hassle with the operation of selecting the parts you want to mess with than other applications i've seen

Re: Image de-warping tool, and Multics/GCOS panels

> On Oct 27, 2017, at 11:30 AM, Noel Chiappa via cctalk > wrote: > > Hey all, I've been doing research on Multics front panels, which it turns out > are slightly different from those on the Honeywell 6000 series machines which > ran GCOS, and are often confused with

Apple II no video display

Folks, I have an Apple II that produces one beep at power on, but my monitor says "no video present". A scope on the output shows frame sync but at low levels. The odd thing is that ic A9 appears to be a 74S151 not a 74LS151. I wouldn't expect this to work, but I assume it was working at some

Image de-warping tool, and Multics/GCOS panels

Hey all, I've been doing research on Multics front panels, which it turns out are slightly different from those on the Honeywell 6000 series machines which ran GCOS, and are often confused with them. So, I've put together a Web page about them: Multics and Related 6000 Series Front Panels

RK05/BA11 slides

So, you have an RK05 drive, but you're missing the slides to mount it? Your troubles are over (sort of :-). It turns out the slide DEC used was the General Devices 'Chassis Trak' C-230-S-122 (22") - and those are still available (e.g. from Newark). They're somewhat pricey - the -124 (24") is

RE: Which Dec Emulation is the MOST useful and Versatile?

Kip, I think "emulation" and "simulation" get used pretty much interchangeable. SIMH is touted a simulator, Hercules/390 as an emulator yet they are both programs that provide a "bare metal" machine via software on which an operating system can be installed. Neither make any attempt to reproduce