Date   : Fri, 08 Dec 2006 10:22:41 +0000
From   : jgh@... (Jonathan Graham Harston)
Subject: Scrolling scrolling scrolling...

>Message-ID: <20061207223149.57363.qmail@...>
 
Steve Fewell <kranser@...> wrote:
> --- Sprow <info@...> wrote:
> > > AUG says this location is controlled by OSBYTE &75
> > > so you should probably use that method instead ;)
 
> If I remember correctly, some OSBYTE calls that the
> manual says can only be read, can actually be written
> to if the value of Y is set correctly (in the same way
> as per the READ/WRITE OSBYTE calls).
> 
> Not sure if this is the case here though.
 
Not that case here. All OSBYTEs < 128 ignore the Y value and set
it to zero internally, so that even those calls that internally
use the code from a >128 OSBYTE (such as *fx1 -> *fx241 or
*fx4 -> *fx237), Y is set to zero, so only writing is possible.
 
-- 
J.G.Harston - jgh@...                - mdfs.net/User/JGH
There are three food groups: brown, green and ice cream.