Re: A89: rom patching
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Re: A89: rom patching
cant you just take out a batt and hold apps in when you put it in?
At 04:29 PM 1/1/00 +0100, you wrote:
>That should work just fine.
>I am myself doing some tests with changeing the flash.
>as long as you dont change anything below $212000 or $218000 (dont now
>exactly wich now, and I dont have my notes here) you should be safe.
>The execution of the actual OS starts somewhere here, and the bootloader
>checks some byte(s) below this points and !!! Refuses to start !!! if
>they are changed. That is, it is very possible to totally wreck your
>calc, beyond all repair by fiddleing with the flash. You can ofcourse
>desolder the flash and reflash it outside of your calc, or hook on some
>extra hardware or something to fix it, but you can't fix it with any
>link software.
>As I said, I know the basic principles of changeing the flash, but I
>have had some problems in my experiments. some not even related to the
>problem, but to my tools I use.. highly annoying.
>
>//Olle
>
>Robin Kirkman wrote:
> >
> > does anyone know exactly how AU patches the rom in HW1?
> > i've thought up an interesting idea for writing my own OS that i'd like
> > to try out.
> >
> > Essentially, here's how it would work:
> >
> > The program gets access to the flashrom
> > The program flashes it with something it recieves from the linkport.
> >
> > does this sound feasable to anyone but me?
> > --robin
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