Re: A86: Terms

To: <assembly-86@lists.ticalc.org>
Subject: Re: A86: Terms
From: "Trey Jazz" <joemama@minot.com>
Date: Tue, 5 May 1998 16:24:16 -0500
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: assembly-86@lists.ticalc.org


thats what i was saying, well almost saying, the interupts have to be
manually located and you gotta find out where they stop and then go back a
byte for the ret (wont work on multiple ret interupts) then write interupt B
starting over the ret of interupt A

>Why can't there be more than one user interrupt installed at a time?  On
>the pc when you install an interrupt, you just read in the vector of the
>int you want, set it to the start of your ISR (interrupt service routine),
>then call the old ISR at the end of yours.   So if program A is running
>when you install your program B, program B reads in A's address, sets the
>vector (the address the cpu calls when that interrupt is run) to it's
>address (program B's address), then calls program A's address when it's
done.

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