Subject: Re: VS II/RC pieces + Q-bus question
To: Greg Ingram <ingram@symsys.com>
From: David Evans <dfevans@bbcr.uwaterloo.ca>
List: port-vax
Date: 02/01/2000 16:52:28
Greg Ingram wrote:
>
> Q-bus question: All of my gear is dual- or quad-height. It appears that
> I can slot two dual-height boards side-by-side. No?
Correct, but not in the first few slots that are marked Q/CD. Only in slots
that are marked Q/Q.
> If I don't put the
> boards side-by-side, do I need a bus-grant-continuity card?
>
It depends. :) The bus zig-zags. On the BA123 it leaves the last Q/CD
slot, then goes to the next slot at the top, then to the bottom, then to the
next slot to the left on the *bottom*, then to the top, then to the next slot
to the left on the *top*, then to the bottom, and so on. So you may or may
not need a grant continuity card, depending on where you're putting things.
It's been nine years since I've looked inside a BA23 so I can't help you
there.
--
David Evans (NeXTMail/MIME OK) dfevans@bbcr.uwaterloo.ca
Computer/Synth Junkie http://bbcr.uwaterloo.ca/~dfevans/
University of Waterloo "Default is the value selected by the composer
Ontario, Canada overridden by your command." - Roland TR-707 Manual