Subject: Re: VS II/RC pieces + Q-bus question
To: Greg Ingram <>
From: David Evans <>
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

David Evans          (NeXTMail/MIME OK)   
Computer/Synth Junkie            
University of Waterloo         "Default is the value selected by the composer
Ontario, Canada           overridden by your command." - Roland TR-707 Manual