> From: ard_at_p850ug1.demon.co.uk (Tony Duell)
> Subject: Re: I have a PDP-11/34 programmer's console, what should I do with it?
> To: classiccmp_at_classiccmp.org
> Date: Sat, 16 Mar 2002 01:08:38 +0000 (GMT)
> In-Reply-To: <01aa01c1cc34$96981700$8a0101ac_at_ibm23xhr06> from "John Allain" at Mar 15, 2 10:17:56 am
> Sender: owner-classiccmp_at_classiccmp.org
> Reply-To: classiccmp_at_classiccmp.org
>
> >
> > tony said:
> > > If you then solder the mating part of the connector to stripboard
> > > with a track cut between the 2 rows of pins then each pin will be
> > > on it's own strip.
> >
> > This isn't bad, except for that the signals are now one set of
> > 1,3,5,7... and one set of 2,4,6,8... If I want to keep the
> > contiguous signals together then I have to jumper just about
>
> I may be missing something here, but is there any reason why you have to
> keep the signals in numerical order? OK, you have a PDP11/34 console with
> the 20 way (or so) ribbon coming off it. What are you trying to link it
> to? If you're building your own interface circuit you're going to have to
> route the signals around to different chips, surely.
Seems to me that nearly all ribbon cables use even-numbered pins for
signal and odd-numbered pins for ground. So signal and ground lines
alternate in the cable.
carl
--
carl lowenstein marine physical lab u.c. san diego
clowenstein_at_ucsd.edu
Received on Sat Mar 16 2002 - 00:50:19 GMT