Re: A86: How did they find the ROM calls???
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Re: A86: How did they find the ROM calls???
Thats majik.
(Among other things) their main source was a .85b file. Download a backup,
look at the state of the mem, change some stuff... start mapping... soon
you learn where the calc keeps things, such as the cursor locations...
lots of temporary variables... and for ZShell, the custom menu (which
convieniently used the actual ROM addresses of the functions they called).
They did not, however, get access to the ROM itself until AFTER they
attained the ability to execute the assembly code (through the custom
menu... though there are a few other holes...)
--Brock
On Mon, 6 Mar 2000, Cassady Roop wrote:
>
> They used magic.
>
> Pbf16@aol.com wrote:
> >
> > Does anybody know how the authors of Zshell or Ash found out the ROM calls for thier specific calcs?
>
>
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