help needed: problem with UNIBUS access on my PDP-11/70

From: Johnny Billquist <bqt_at_update.uu.se>
Date: Tue Jul 16 18:19:00 2002

On Tue, 16 Jul 2002, Eric Smith wrote:

> Gooijen H wrote:
> > By experiment I will check the NPR wire of the other UNIBUS slots. You
> > know why once you have seen the backplane of an 11/70.
>
> Johnny Billquist <bqt_at_update.uu.se> wrote:
> > Huh? It's no more difficult checking the NPR wire in the 11/70, than on
> > any other Unibus backplane. And it *is* rather simple to see if the
> > jumper is there or not.
>
> On the 11/70 Mike and I have been working on, the NPR grant jumpers were
> wrapped before most of the other wiring, rather than after. This makes
> it fairly difficult to see them.

They are on "mine" too, but I still don't consider it hard to see.

And compared to testing empirically, it's definitely easier, I'd say.

        Johnny

Johnny Billquist || "I'm on a bus
                                  || on a psychedelic trip
email: bqt_at_update.uu.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
Received on Tue Jul 16 2002 - 18:19:00 BST