Re: A92: Need Help to replace interrupt vectors

To: assembly-92@lists.ticalc.org
Subject: Re: A92: Need Help to replace interrupt vectors
From: Edward Plese <eplese@lnd.com>
Date: Tue, 10 Feb 1998 17:44:09 -0600
References: <v0211010ab0fb10103e0e@[206.149.127.65]> <v03110701b1064658532a@[134.157.81.172]>
Reply-To: assembly-92@lists.ticalc.org


You also have to add a routine at the end of the program to restore the
original interrupt vector.  This is in the graylib_off or whatever it's
called.

> I tried to use the way to redirect an interrupt vector used by David
> Ellsworth in gray4lib and suggested by him in "convert.txt" (see below),
> but when my program terminates, it always freeze the calc.
> By the way, the only thing my new interrupt vector do is branch to the old
> interrupt vector.
>
>         move.w  #$0700,d0
>         trap    #1
>         move.l  $64,old_int_1
>         bclr.b  #2,$600001
>         move.l  #int_1,$64
>         bset.b  #2,$600001
>         trap    #1

References:

A92: BBS software

From: gussie@alaska.net (Grant Stockly)

A92: Need Help to replace interrupt vectors

From: Vincent Bernardi <bernardi@ibm4.cicrp.jussieu.fr>