Re: A89: Linux Port for 89/92


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Re: A89: Linux Port for 89/92




It is a trivial matter to brute force break the code.  We just need someone
willing to hook the calc to their computer.

-Adam

Johan wrote:
> 
> Mark Zavislak wrote:
> >
> > TI has already anticipated problems with parts of the rom being
> > overwritten.  They have hardware locked the first 64k (?) of the flashrom
> > chip, and if all else fails, pulling out all the batteries, then holding
> > the APPS key while you insert the last one will bring you to the
> > bootloader screen which allows you to reinstall TI code.  Interestingly
> > enough, if the port is ever developed, this would probably be the
> > preferred way of installing it...
> 
> We can't install new code that way. There is an MD5 checksum at the end of
> the code, but it is scrambled with 512-bit RSA encryption. This makes it
> impossible for us to create anything that the boot loader would accept since
> we don't know the RSA key.
> 
> //Johan


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