Re: A92: Deactivate 2nd+Lock+On

To: assembly-92@lists.ticalc.org
Subject: Re: A92: Deactivate 2nd+Lock+On
From: The Doors Team <doors@altern.org>
Date: Mon, 18 May 1998 20:15:27 +0200
Delivered-To: assembly-92-outgoing@towerguard.unix.edu.sollentuna.se
In-Reply-To: <01bd8282$3eb2b360$d88460c2@lukas1>
Reply-To: assembly-92@lists.ticalc.org


>    How can I deactivate the 2nd-Lock-On  Reset inside a program. Klaus

You can redirect the ON-Key interrupt vector(auto-int 6), using the
following code:

	move.w		#$700,d0
	trap		#1
	bclr.b		#2,($600001)	;disables mem protection
	move.l		$78,d5	;saves old auto int 6
	move.l		#ONKEY,$78 ;installs your one
	bset.b		#2,($600001)	;re enable
	trap		#1
(...)
and ONKEY is a label which just returns
ONKEY:		rte	(rte because it is an auto int)

	when you don't need it, then do:
	
	move.w		#$700,d0
	trap		#1
	bclr.b		#2,($600001)	;disables mem protection
	move.l		d5,$78	;restores old auto-int 6
	bset.b		#2,($600001)	;re enable
	trap		#1

I think this code works




Xavier VASSOR
---The Doors Team
doors@mail.dotcom.fr	or	doors@altern.org
http://www.altern.org/doors
ICQ:10241721

References:

A92: Deactivate 2nd+Lock+On

From: "Klaus" <lukas1@via.at>