Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/5/84; site terak.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!godot!harvard!seismo!hao!noao!terak!doug
From: doug@terak.UUCP (Doug Pardee)
Newsgroups: net.micro.cbm
Subject: Re: Changing warmstart vectors
Message-ID: <447@terak.UUCP>
Date: Fri, 15-Mar-85 12:21:13 EST
Article-I.D.: terak.447
Posted: Fri Mar 15 12:21:13 1985
Date-Received: Tue, 19-Mar-85 04:59:47 EST
References: <947@topaz.ARPA>
Organization: Terak Corporation, Scottsdale, AZ, USA
Lines: 19

>  I want to modify the NMI vectors (?) so that a run-stop/restore will restart
> my program. The program is a terminal program, so it needs the RS232 NMI
> handling. How do I modify the vectors (and which ones) so that a run-sto/
> restore will do what I want without interfering with normal RS232 NMI stuff?

I can't tell you offhand the exact info, but you don't want to play
around with page zero, because there's another place just for what
you want to do.

I don't remember the address just now -- it's $A000 or something like
that.  It's used by BASIC and by cartridges for exactly the same purpose
that you have.  As I recall, you have to page out the BASIC ROM so that
you have the RAM in its place, then you put a pointer in that location
which points into your program.  At that part of your program there
has to be a 7-byte (is that right?) sequence, including "CBM" or 
something similar in PetAscii.  Check in the Programmer's Reference,
I'm pretty sure it's in there.
-- 
Doug Pardee -- Terak Corp. -- !{hao,ihnp4,decvax}!noao!terak!doug