A86: Re: How did they find the ROM calls???
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A86: Re: How did they find the ROM calls???
There are text files about this on ticalc.org that explain how the
calculators were "hacked" back in the day. The basic way was to modify a
variable on the calc to point to ROM instead of RAM, then send this variable
back to the PC, which would be a mini ROM dump. Once this was done, it was
analyzed and they determined how to execute assembly code. After this, it
just took a lot of dissassembly of the ROM.
> Does anybody know how the authors of Zshell or Ash found out the ROM calls
for thier specific calcs?
>
References: