On Fri, Aug 2, 2019 at 5:04 PM Warren Toomey <wkt@tuhs.org> wrote:

> On Fri, Aug 02, 2019 at 06:49:19PM -0400, Jim Carpenter wrote:
> > On 8/2/19 4:14 PM, Warren Toomey wrote:
> > > Hi all, I'm chasing the Youtube video of the PDP-7 at Bell Labs where
> > > people are using it to draw circuit schematics.
> >
> > A Bell Labs video? The only Bell Labs video I remember seeing that had
> > someone doing circuit schematics had it being done on a PDP-5. The -7 was
> > shown later doing music stuff. (That's the -7 that I thought maybe Unix
> > started life on.)
>
> Thanks Jim, Is it this one?
> https://www.youtube.com/watch?v=iwVu2BWLZqA
>
> They mention a Graphics-1 device, so maybe I'm getting this confused
> with the PDP-7 and the Graphics-2.
>

The early one for the circuit simulator is definitely on a PDP-5 and I
presume the Graphics-1 display. You can see the PDP 5 letters on one of the
cabinets. How do you know that the music was composed on the PDP-7 that
appears from 9:20-10:30? Cool paper tape feeding sequence, though, you
gotta admit :) (well, unless you waited for far too many of those to run
back in the day).

Warner