DMMCheck (Now a word from a non-sponsor)

2016-12-02 Thread drlegendre .
Quick FYI for the bench-techs in the group. A few months back, I became aware of this device, as well as the others produced by the same fellow: http://www.voltagestandard.com/DMMCheck_Plus.html He's producing several types of low-cost, precision voltage / current / frequency references. Prices

Re: Winchester-style coax connectors?

2016-12-02 Thread Josh Dersch
On 12/2/16 8:29 AM, Jon Elson wrote: On 12/01/2016 01:27 PM, Josh Dersch wrote: but what I failed to notice is that three of the "pins" (for the X, Y and Blank signals) are actually tiny coaxial connectors that fit within the Winchester housing (i.e. they're the same diameter as a

Ersatz-11 V7.2

2016-12-02 Thread John Wilson
V7.2 of Ersatz-11 is done. New features include: - Intel gigabit Ethernet driver (ASSIGN XH0: IGBE:). - FTP server in DOS and stand-alone versions (FTPSERVER START /ACC=users.txt). - Filename completion with TAB key. - Stand-alone .ISO file is dual-bootable (copy to CD-R or flash drive). -

Re: Thinking about acquiring PDP stuff

2016-12-02 Thread Brad H
Original message From: allison Date: 2016-12-02 2:23 PM (GMT-08:00) To: cctalk@classiccmp.org Subject: Re: Thinking about acquiring PDP stuff On 12/02/2016 12:33 PM, Brad H wrote: > -Original Message- > From: cctalk

RE: Base 64 posts to the list

2016-12-02 Thread Sam O'nella
I'm not sure if it would make a difference but in your membership options to the list you can choose the format of the messages and how you'd like to receive them. I know my settings are plain text but I haven't played with the others to know if they have an option like that. The only time I've

Re: Thinking about acquiring PDP stuff

2016-12-02 Thread allison
On 12/02/2016 12:33 PM, Brad H wrote: > -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Rich Alderson > Sent: Thursday, December 1, 2016 1:34 PM > To: 'General Discussion: On-Topic and Off-Topic Posts' > Subject: RE: Thinking

Re: Digital circuits and analog devices

2016-12-02 Thread Guy Dawson
There's a Sophie Wilson talking head exhibit at the Science Museum in London where she says the prototype ARM chip worked well but when they went to measure it power it used they discovered that the power pin was not connected. The ARM CPU was running on current leaking from the chips it was

Re: Digital circuits and analog devices

2016-12-02 Thread Mouse
>> I think the original is 'Digital circuits are made from analog >> parts' >> Another of the laws is 'There is no such thing as ground' This reminds me of an incident of my own which is one of my favourite examples of why learning about things at every level possible is useful. I built a PROM

Re: Digital circuits and analog devices

2016-12-02 Thread Chuck Guzis
Just about anyone who's ever worked in ECL (non-saturating logic) is aware of this and doesn't need to be reminded by anyone. The same for anyone implementing logic using vacuum tubes. In fact, the other aspect of digital logic is that it's a study of transmission lines--and that's often voiced.

RE: Thinking about acquiring PDP stuff

2016-12-02 Thread Brad H
-Original Message- From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Rich Alderson Sent: Thursday, December 1, 2016 1:34 PM To: 'General Discussion: On-Topic and Off-Topic Posts' Subject: RE: Thinking about acquiring PDP stuff From: Brad H Sent:

Re: Digital circuits and analog devices

2016-12-02 Thread Tony Duell
On Fri, Dec 2, 2016 at 1:33 PM, Noel Chiappa wrote: > > A related one ... came from Professor M. V. Wilkes > > That one I _did_ remember (although I couldn't remember if it was Wilkes or > Wheeler - I knew it was one of those Cambridge guys :-), but it's not quite >

Re: Digital circuits and analog devices

2016-12-02 Thread Tony Duell
On Fri, Dec 2, 2016 at 3:57 PM, Paul Koning wrote: > > On the bit about grounds, I still have tucked away somewhere a very funny > (but also serious) memory by Bob Steward (lead designer of a number of VAXen) > entitled "Do not cut your grounds". He described how a

Re: Digital circuits and analog devices

2016-12-02 Thread Toby Thain
On 2016-12-02 10:57 AM, Paul Koning wrote: ... A somewhat related area is the many different ways in which a number of chip designers messed up the random number generators needed in half duplex Ethernet. I remember Intel as a particular offender, but probably not the only one. AMD got it right

Re: Winchester-style coax connectors?

2016-12-02 Thread Jon Elson
On 12/01/2016 01:51 PM, Josh Dersch wrote: Like one of these bad-boys, only with 14 connectors rather than 34: http://cables24.com/en/others/cable-v-35/1470-V-35-m34-Winchester-34pin-male-connector Sorry for not being more specific. The coax connectors in a 13W3 connector (for example) are

Re: Winchester-style coax connectors?

2016-12-02 Thread Jon Elson
On 12/01/2016 01:27 PM, Josh Dersch wrote: but what I failed to notice is that three of the "pins" (for the X, Y and Blank signals) are actually tiny coaxial connectors that fit within the Winchester housing (i.e. they're the same diameter as a Winchester pin). These pins MIGHT be

Re: Base 64 posts to the list

2016-12-02 Thread Peter Coghlan
Lately, some list posts have begun appearing in Base 64 format. I read the list in daily digest mode, and these posts are not converted to anything sensible, all I get is a long string of hex codes. This is slightly frustrating, since I have to look up the post in the list archive if I want

Re: Digital circuits and analog devices

2016-12-02 Thread Paul Koning
> On Dec 2, 2016, at 12:59 AM, Tony Duell wrote: > > 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

Re: Digital circuits and analog devices

2016-12-02 Thread Liam Proven
On 2 December 2016 at 15:11, Noel Chiappa wrote: > Since you'd done all the hard work (typing them in), I uploaded them (less > typos :-), to: > > http://gunkies.org/wiki/Vonada's_Engineering_Maxims > > Interestingly, there's a typo in the originall: "worse-case". :-)

Re: Digital circuits and analog devices

2016-12-02 Thread Noel Chiappa
> From: Eric Smith > The full set from the book (any typos are mine) Since you'd done all the hard work (typing them in), I uploaded them (less typos :-), to: http://gunkies.org/wiki/Vonada's_Engineering_Maxims Interestingly, there's a typo in the originall: "worse-case". :-)

Re: Base 64 posts to the list

2016-12-02 Thread Mouse
> Lately, some list posts have begun appearing in Base 64 format. I > read the list in daily digest mode, and these posts are not converted > to anything sensible, [...]. > Is there a way of dealing with this, apart from humbly requesting > posters to not post in Base 64? It may not always be

Base 64 posts to the list

2016-12-02 Thread jonas
Lately, some list posts have begun appearing in Base 64 format. I read the list in daily digest mode, and these posts are not converted to anything sensible, all I get is a long string of hex codes. This is slightly frustrating, since I have to look up the post in the list archive if I want to

Re: Digital circuits and analog devices

2016-12-02 Thread Noel Chiappa
> From: Tony Duell > It's one of Don Vonada's laws. Ah, thank you, thank you, that's the one I was looking for! I knew _you_'d know it! :-) > A related one ... came from Professor M. V. Wilkes That one I _did_ remember (although I couldn't remember if it was Wilkes or Wheeler - I

RE: PDP-8e power switch key?

2016-12-02 Thread W2HX
Aah. Great, thanks. If I can't get one made locally I will certainly get that one! thank you Eugene -Original Message- From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Mark G Thomas Sent: Thursday, December 01, 2016 12:13 PM To: General Discussion: On-Topic and Off-Topic