Re: Digital circuits and analog devices

On Thu, Dec 1, 2016 at 10:59 PM, Tony Duell wrote: > It's one of Don Vonada's laws. I am pretty sure I first read them in > 'Computer Engineering', that book produced by DEC. I think the > original is 'Digital circuits are made from analog parts' > > Another of the laws is

Re: Digital circuits and analog devices

On Fri, Dec 2, 2016 at 2:31 AM, Noel Chiappa wrote: > So I have this memory of a set of law promulgated by an engineer at DEC, one > of which was something to the effect that 'all digital circuits are made out > of analog devices'. However, my memory doesn't recall where

Re: Winchester-style coax connectors?

Can you take a picture of the side you have ? I have a few On Dec 1, 2016 11:27 AM, "Josh Dersch" wrote: Hey all -- Due to a small miracle I now have 8KW of perfectly functioning core in my long-ill Imlac PDS-1D. The last hurdle is devising a replacement for the missing

Re: ISO Xebec S1410A fw #104792 or 104793

I have imaged a couple of ROMS from Xebec Controllers: ASSY 104527 REV E06, SN 132-2860\xebec_104521h_adb5_TMS2732AJL-45.bin 104686, ROM 104700A (mfm-scsi bridge)\104700a_xebec_assy104686.bin Do either of these look like something you would like? -Original Message- From: Al Kossow

RE: Thinking about acquiring PDP stuff

From: Brad H Sent: Thursday, December 01, 2016 8:18 AM > My Intellec 230 though might give a PDP a run for its money. See, I'm trying to get you to stop saying "a PDP". There's no such thing. There are families of PDP-n things, but there are wide differences in size, weight, and capabilities.

Re: Digital circuits and analog devices

On 12/01/2016 06:31 PM, Noel Chiappa wrote: > So I have this memory of a set of law promulgated by an engineer at > DEC, one of which was something to the effect that 'all digital > circuits are made out of analog devices'. However, my memory doesn't > recall where I saw this, and my Google-fu is

Re: Digital circuits and analog devices

You don't really find many examples of discrete states, anywhere in the natural world. Just not a whole lot of quantization out there, unless you reduce to the subatomic level - and while you'll find discrete states (quanta) there, they are by nature indeterminate. Have to admit, we did get an

RE: Digital circuits and analog devices

Not only are they made of analog devices, but at the speeds things have been running at for the last 20 (maybe 30) years, they often behave like analog devices. Things like transmission line theory, crosstalk, oscillation, etc are all important design considerations. Eugene -Original

Digital circuits and analog devices

So I have this memory of a set of law promulgated by an engineer at DEC, one of which was something to the effect that 'all digital circuits are made out of analog devices'. However, my memory doesn't recall where I saw this, and my Google-fu is not strong enough to turn it up. Can anyone help?

Re: Winchester-style coax connectors?

On 12/1/2016 11:51 AM, Josh Dersch wrote: On Thu, Dec 1, 2016 at 11:47 AM, Paul Koning wrote: On Dec 1, 2016, at 2:27 PM, Josh Dersch wrote: ... The Imlac uses a Winchester connector (14 position) for the display and while they're not as common

Re: Winchester-style coax connectors?

Have you considered using a vector arcade game monitor? On 12/1/16 1:27 PM, Josh Dersch wrote: > Hey all -- > > Due to a small miracle I now have 8KW of perfectly functioning core in my > long-ill Imlac PDS-1D. The last hurdle is devising a replacement for the > missing display (an X/Y vector

Re: Winchester-style coax connectors?

On Thu, Dec 1, 2016 at 11:47 AM, Paul Koning wrote: > > > On Dec 1, 2016, at 2:27 PM, Josh Dersch wrote: > > > > ... > > The Imlac uses a Winchester connector (14 position) for the display and > > while they're not as common these days the parts can

Re: Winchester-style coax connectors?

> On Dec 1, 2016, at 2:27 PM, Josh Dersch wrote: > > ... > The Imlac uses a Winchester connector (14 position) for the display and > while they're not as common these days the parts can still be found so I > thought I was in the clear, but what I failed to notice is that

Winchester-style coax connectors?

Hey all -- Due to a small miracle I now have 8KW of perfectly functioning core in my long-ill Imlac PDS-1D. The last hurdle is devising a replacement for the missing display (an X/Y vector display). For the time being I'm going to attempt to use an oscilloscope, but first I need to build a

Re: PDP-8e power switch key?

A long, long time ago (1978, 79?) when I had a straight 8 and our group had a new VAX 11/780 I verified that the same key works on both machines. On Thu, Dec 1, 2016 at 9:13 AM, Mark G Thomas wrote: > Hi, > > On Wed, Nov 30, 2016 at 08:35:31PM -0800, W2HX wrote: > > Hi folks, >

Re: PDP-8e power switch key?

Hi, On Wed, Nov 30, 2016 at 08:35:31PM -0800, W2HX wrote: > Hi folks, > > What are people doing for keys for the 8e? Is there a standard key used for > all of them? Or do I need to have one made with some specific serial number > of my key lock? I did some googling of this issue but wasn't

Re: PDP-8e power switch key?

On Thu, Dec 1, 2016 at 11:57 AM, Fred Cisin wrote: > On Thu, 1 Dec 2016, W2HX wrote: > >> Thanks to everyone for the response on keys. I am sorry I don’t know how >> I missed all the collected information here on this subject. My apologies. >> I now have all the information I

RE: PDP-8e power switch key?

On Thu, 1 Dec 2016, W2HX wrote: Thanks to everyone for the response on keys. I am sorry I don’t know how I missed all the collected information here on this subject. My apologies. I now have all the information I need on this subject! Thanks everyone. If you can, you should remove the lock

RE: Thinking about acquiring PDP stuff

-Original Message- From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of John H. Reinhardt Sent: Thursday, December 1, 2016 5:18 AM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: Thinking about acquiring PDP stuff On 12/1/2016 2:22

Re: Thinking about acquiring PDP stuff

On 11/30/16 3:15 PM, Rich Alderson wrote: From: Brad H Sent: Wednesday, November 30, 2016 9:16 AM That was kind of why I thought buying a PDP in pieces over time might be my way to go, even if it took eons to get everything I needed to rebuild one. It'd be fun to try and piece one back

RE: PDP-8e power switch key?

Hey all, Thanks to everyone for the response on keys. I am sorry I don’t know how I missed all the collected information here on this subject. My apologies. I now have all the information I need on this subject! Thanks everyone. Eugene -Original Message- From: cctalk

Re: Thinking about acquiring PDP stuff

On 12/1/2016 2:22 AM, jim stephens wrote: Very true, but didn't honestly think of that in context of the thread, nor have I ever had any Digital Group stuff. And does any Digital Group cause any injuries requiring orthopedic medical attention when you are lifting it? thanks jim Only

RE: Looking for Philips P2000C P-Systems discs

> pic? > Like this ? http://www.computinghistory.org.uk/det/14769/Philips-P2000C-P2012/ -Rik