Date   : Fri, 07 Aug 2009 00:53:25 -0700 (PDT)
From   : flynnjs@... (Jason Flynn G7OCD)
Subject: Acknowledging 1770 NMI - was Re: BBC B+ Econet

--- On Wed, 5/8/09, Michael Firth <mfirth@...> wrote:
> The question now is whether anyone can point me in the
> direction of the minimum code needed to clear / acknowledge
> an interrupt from the disk controller 

A read of the status register will clear it. However, I'm
not quite sure why there should be anything in the SR.
Pin 13 of the 1770 is /Master Reset, I'm wondering if this
isn't getting pulsed at power on and therefore garbage
in the SR is generating the INTRQ.

 Jason