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From: dyer@atari.UUcp (Landon Dyer)
Newsgroups: comp.sys.atari.st
Subject: Re: RAM resident utilities, TRAPs from TRAPs
Message-ID: <459@atari.UUcp>
Date: Tue, 11-Nov-86 16:24:47 EST
Article-I.D.: atari.459
Posted: Tue Nov 11 16:24:47 1986
Date-Received: Wed, 12-Nov-86 21:13:55 EST
References: <1457@batcomputer.tn.cornell.edu>
Organization: Atari Corp., Sunnyvale CA
Lines: 22

> 	In the current ROM TOS version of the Alt-Help screen dump,
> the UA stored at $502 is called to actually do the screen dump. You
> may install your own UA there.   But the exception handler saves
> all registers except A7 (15 registers) on the stack, then calls a
> subroutine which in turn calls ($502) as a subroutine.  What it all
> adds up to is that the needed check is now:
> 
> 	BTST	#5,68(A7)
> 
> Any comments/suggestions would be appreciated.


Yes.  Don't do it.

-- 

-Landon Dyer, Atari Corp.		        {sun,lll-lcc,imagen}!atari!dyer

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