Date   : Mon, 11 Jul 2005 12:08:08 +0100
From   : jgh@... (Jonathan Graham Harston)
Subject: Re: NFS Versions

Pete Turnbull <pete@...> wrote:
> > ANFS 4.25 checks the os version and returns a BAD ROM message if
> > it finds an os of <3  (osbyte 0).  So its not likely that the rom
> > would run on a B or B+ without modification.
 
ANFS 4.2x also expects to find RAM in Hazel at &C000, and to find
the station number and various other settings by calling OsByte to
read the CMOS settings.
 
> I don't remember that, but I'm sure you're right.  I wonder if 4.21 is
> different, and if I used that, or if I had a hacked 4.25...
 
I remember having a rummage around in 4.21, and I think that's the
one where the 'Bad string' error code starts:
 
LDA &FD
 
instead of 
 
LDA #&FD
 
...so generating an error with ERR set to whatever the contents of
&FD was...
 
-- 
J.G.Harston - jgh@...                - mdfs.net/User/JGH
There are three food groups: brown, green and ice cream.