Re: A89: Re: Re: Re: A new cake of s**t?
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Re: A89: Re: Re: Re: A new cake of s**t?
Who said they removed the routine... just the jump tables entry. The
jump table isn't used by the rom so they can remove anything they deem
unnessacary for _educational_ app development. They can remove any jump
table entry they deem a risk for their investment.
Zeljko Juric wrote:
>
> Hi!
>
> > According to an response to an email I sent TI, the limit is so
> > that people won't run flash applications in RAM. Could some one
> > tell me how some one would do this? Since aren't flash apps
> > encrypted, or is that just the certificates?
>
> They are just extremely stupid. See, suppose that their intention
> were to disallow running flash applications in RAM. But their
> protection device is buggy: it does not protect anything out of
> "regular" RAM address space (0-256 KB). That's why we can always
> execute any program in the RAM no matter how much it is long,
> and no matter which AMS release (including any future ones) is
> installed in the calculator. I will explain this better. Suppose
> that you copy and relocate properly the flash application to
> address x to RAM. You can't start it from address x due to
> protection. Yes, this protection can be disabled using HW2Patch,
> but TI can make such AMS without any "software holes" so that
> HW2Patch would not be possible. But, suppose that you copy the
> flash application to address x to RAM, but to relocate it instead
> as it is located at address x+256K. Then, if you start it from
> address x+256K, the protection will not work!!! Due to partial
> decoding, addresses x and x+256K points to the same physical
> address in the RAM. TI can't stop us to doing such things by
> making new AMS. The only way to stop is to make HW3 hardware
> release, with non-buggy protection device.
>
> I hope that somebody from TI will read this. After this, if they
> are enough clever, they will remove the protection. As you can
> see, this protection can always be bypassed, no matter what they
> done. The final note for TI: we really don't want to crack and
> to pirate your commertial flash apps. We only want to produce
> OUR freeware software without any limitations!
>
> Zeljko Juric
--
Scott "Wrath" Dial
wrath@calc.org
ICQ#3608935
Member of TCPA - tcpa.calc.org
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