Re: A85: I was wondering how to start Usgard using a jp ($8BFF)

To: <assembly-85@lists.ticalc.org>
Subject: Re: A85: I was wondering how to start Usgard using a jp ($8BFF)
From: "Jon Olson" <morph@jmss.com>
Date: Mon, 23 Feb 1998 17:48:14 -0500
Reply-To: assembly-85@lists.ticalc.org


As far as i know, TSR's stop executing when you exit UsGard (they're
terminate stay resident, but i believe that's limited to the context of
while you're running the shell). That makes it impossible to start it from
any other key sequence. The only reason that the custom menu location works
is because each of the 12 items on the custom menu is really just a pointer
to soem executable code. If you set one of these pointers to point to the
code for UsGard, then UsGard executes. Since the contents of the Prgm menu
never change, there is no reason for them to put a pointer in for each menu
item, thereby making it impossible to put UsGard there. (or in any place
other than the custom menu, as far as i know).

-- Jon Olson

-----Original Message-----
From: Richardlewis <richardlewis@cedarcity.net>
To: assembly-85@lists.ticalc.org <assembly-85@lists.ticalc.org>
Date: Monday, February 23, 1998 6:37 PM
Subject: Re: A85: I was wondering how to start Usgard using a jp ($8BFF)


>
>-> I was thinking of writing a TSR program that would start USGARD from
some
>-> other button...such as <PRGM> <F5>. Something that is unused and
wouldn't be
>-> written over easily. Any info would be appreciated.
>->
>-> Thanks
>-> Mogul52
>
>I don't know how it is for usgard, but the custom menu requires a some kind
>of header, or it won't work.  You may be jumping in to the header, and
>executing data as program data.  That would tend to screw things up.
>
>My suggestion:  alalyze the header, and look for the jump, then adjust your
>pointer if it is off.
>

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Re: A85: I was wondering how to start Usgard using a jp ($8BFF)

From: Jimmy =?iso-8859-1?Q?M=E5rdell?= <yarin@acc.umu.se>