Re: A83: Re: weird ROM...

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Re: A83: Re: weird ROM...


 
Right, that's my problem since the TI-OS rebuilds the table every time the user "does something".
So I started looking for the originals pointers, but I know I cannot change them... so do you think it is possible, in any way, on the TI-83, to install hooks?
I have been trying for a month but I have not been able to find a correct (working) way yet.

 Jean Carot


--

On Mon, 29 Jan 2001 16:34:57  
 Dan Englender wrote:
>
>Well, if you change the vectors to point to some code you want it to
>execute, it should work.  The problem is that's it's not easy to get the
>points you want in there.  TIOS changes the vectors itself whenever an
>application change occurs, so if you change the vectors in an assembly
>program (which has a specific context), the vectors will be overwritten when
>you quit and return to the homescreen context.  On the TI-83 Plus, this is
>facilitated slightly because there are built in hooks in many of the TIOS
>application main routines.
>
>-Dan Englender
>
>----- Original Message -----
>From: "yhean" <yhean@lycos.com>
>To: <assembly-83@lists.ticalc.org>
>Sent: Monday, January 29, 2001 3:43 PM
>Subject: Re: A83: Re: weird ROM...
>
>
>>
>>
>> About these vectors, do you think it is possible to bypass them, so you
>can install a "hook" ?
>> This was my initial search, but I don't think this vector table is
>usable...
>>
>>  Jean
>>
>>
>> --
>>
>> On Sun, 28 Jan 2001 23:02:01
>>  Dan Englender wrote:
>> >
>> >I think you've got a couple different issues here.  First, on the seven
>> >pointers plus backups, it sounds like you're talking about the system
>> >monitor vectors.  Actually, there are only six of these vectors.  The
>last
>> >two bytes in the table are the page of the current application, and the
>> >context number of the current application.  These vectors are used by the
>> >TIOS to pass information to the currently running application.  Check my
>> >"A83: Re: ROMcall reference" from the yesterday (the 27th) for more
>> >information on these vectors.
>> >
>>
>>
>>
>> Get your small business started at Lycos Small Business at
>http://www.lycos.com/business/mail.html
>>
>
>
>


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