Omnibus dones not have a unibus/qbus grant chain.
the general organisation is anywhere it fits generally works save for cards
that have over the top connections.
Allison
-----Original Message-----
From: Pete Turnbull <pete_at_dunnington.u-net.com>
To: classiccmp_at_classiccmp.org <classiccmp_at_classiccmp.org>
Date: Tuesday, November 20, 2001 3:52 AM
Subject: PDP-8 backplane -- was Re: PDP-8 case
>On Nov 20, 0:53, Tony Duell wrote:
>> Since you can put options with top connectors anywhere in the backplane,
>> there would seem to be little point in having special foam over the front
>> slots only.
>
>That reminds me... supplementary question: The machine had gaps between
>some of the cards. It's over 20 years since I used a PDP-8 for real, and
>in those days I wasn't usually allowed at the innards. The gaps don't
>matter, do they? There's no grant chain like in a Unibus, AFAIR. The
>-8/E is an Omnibus machine, of course.
>
>--
>Pete Peter Turnbull
> Network Manager
> University of York
>
Received on Tue Nov 20 2001 - 07:28:12 GMT