Subject: Re: VAX 11/780 progress ... just a little
To: Gunther Schadow <email@example.com>
From: Thor Lancelot Simon <firstname.lastname@example.org>
Date: 09/25/2003 13:44:08
On Thu, Sep 25, 2003 at 12:37:19PM -0500, Gunther Schadow wrote:
> Johnny Billquist wrote:
> >To make a short answer: the unibus termination is *vital*.
> >If you fail diagnostics with it inserted, it's not because of the
> >termination, but because some problem in your Unibus don't show up
> >otherwise. The termination should be in the last slot, in AB.
> So, I need grants and NPG grants in front of the terminator?
*every* slot on the Unibus must have either:
1) A card
2) A continuity ("grant") card
3) if a slot that is wired for VAX DMA, a VAX DMA card or a *VAX DMA
4) A terminator
The terminator must go in the last slot.