Re: A83: Patching the Ti83+ ROM?

To: assembly-83@lists.ticalc.org
Subject: Re: A83: Patching the Ti83+ ROM?
From: "Emir Sakic" <saka@hotmail.com>
Date: Sat, 27 Jan 2001 19:20:56 +0100
Reply-To: assembly-83@lists.ticalc.org


Right. I forgot that OS is updateable :)
Maybe it's possible to edit the OS file (base112.8xu) in a hex editor before 
sending it to calculator?



>From: "Dan Englender" <dan@calc.org>
>Reply-To: assembly-83@lists.ticalc.org
>To: <assembly-83@lists.ticalc.org>
>Subject: Re: A83: Patching the Ti83+ ROM?
>Date: Sat, 27 Jan 2001 12:56:14 -0500
>
>
>Well, TIOS is kept in Flash ROM on the TI-83 Plus (otherwise how would you
>be able to update your Base code version?).  The trouble is that the
>calculator does quite a good job of not letting anything (other than TIOS
>itself) write to the Flash ROM, and of making sure that you don't trick it
>into loading something it doesn't want to into Flash ROM.
>
>-Dan Englender
>
>----- Original Message -----
>From: "Emir Sakic" <saka@hotmail.com>
>To: <assembly-83@lists.ticalc.org>
>Sent: Saturday, January 27, 2001 12:49 PM
>Subject: Re: A83: Patching the Ti83+ ROM?
>
>
> >
> >
> > You can't save anything to ROM so you can't patch it.
> > The only writable ROM is Flash ROM and TI-OS is not in Flash.
> >
> >
> > >Has anybody already tried to patch the ROM of the Ti83+???
> > >
> > >Maybe a simple thing as replacing the _gbufcpy_v routine by FastCopy, 
>is
>a
> > >nice point to start?
> > >
> > >Then looking for some simple optimizations that can be added, etc. etc.
> > >
> > >
> > > Henk Poley
> > >
> >
> > 
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Re: A83: Patching the Ti83+ ROM?

From: "Dan Englender" <dan@calc.org>