Re: A86: Rom Central - Database interactivity with rom calls
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Re: A86: Rom Central - Database interactivity with rom calls
David Ellsworth wrote:
>
> At 04:05 PM 2/22/98 -0500, Matt Johnson wrote:
> >I see. I took it off my page for now. I have two ideas - one, a certain
> >formula that gives a certain answer on a TI-86, or two, a simple hex
> >program you enter in the calculator it gives an answer unique only if
> >someone has A TI-86.
> >
> >any suggestions?
>
> The best you could do would be to have the CGI come up with a random
> string, and have the user input that string to an 86 asm program, which
The person needs a graph link to get the asm to the calc....
> would then output a string. The user would then be required to enter the
> new string into the CGI to download the ROM. Strings generated by the CGI
> script should expire after a certain short period of time, no more than a
> few minutes.
>
> For this to work, you'd need to implement a state machine in CGI. And the
> 86 asm program that does the encryption should be written in a highly
> obfuscated manner, so that even a skilled hacker wouldn't be able to
> understand it from reading a disassembled dump. It should also liberally
> use references to the ROM, so that even someone who didn't understand it
> couldn't write a simulator that could run it without a ROM dump, even if
> they had a text file that described the ROM calls.
>
> Even if you used this method, someone without a TI-86 could still get the
> ROM dump by communicating in real-time with a person who either has a
> TI-86, and/or already has a working ROM dump for the emulator. But that
> could be considered to be just as easy as having the other person send you
> an actual ROM dump.
>
> As for the legality of this, I'd guess that TI would consider it to be just
> as illegal as straight-out distribution. But feel free to ask them. :-)
>
> ---
> David Ellsworth
> davidell@earthling.net
> IRC: eXocomp
> ICQ: 2300673
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