Re: A89: Linux Port for 89/92

To: assembly-89@lists.ticalc.org
Subject: Re: A89: Linux Port for 89/92
From: Adam Davis <adavis@baladyne.com>
Date: Wed, 14 Jul 1999 10:16:23 -0400
Delivered-To: assembly-89-outgoing@towerguard.unix.edu.sollentuna.se
Delivered-To: assembly-89@lists.ticalc.org
References: <0FEU00I534L28R@mail.megsinet.net> <19990714125306.A157@student.liu.se>
Reply-To: assembly-89@lists.ticalc.org


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

Follow-Ups:

Re: A89: Linux Port for 89/92

From: Johan <johei804@student.liu.se>

References:

Re: A89: Linux Port for 89/92

From: Mark Zavislak <felix@megsinet.net>

Re: A89: Linux Port for 89/92

From: Johan <johei804@student.liu.se>