Date : Mon, 25 Oct 2004 21:25:39 +0100
From : Phil Blundell <pb@...>
Subject: Re: &D00
On Mon, 2004-10-25 at 20:57 +0100, Andrew W wrote:
> I read in one book that &D00-DFF was okay for user routines but on
> looking at the advanced user guide it says that the floppy disc
> controller may sometimes make use of it. Can anybody say when the
> floppy disc controller calls this area of memory and if using DFS as
> the filing system is it a safe bet just not to store anything there?
I think the page at &D00 is the NMI workspace, which is used by both NFS
and DFS. NFS, at least, stores some persistent data in that page and
will go wrong if you overwrite it. I'm not sure whether that's also
true of DFS or not.
p.