Re: A89: ROM Question

To: assembly-89@lists.ticalc.org
Subject: Re: A89: ROM Question
From: Olle Hedman <oh@hem.passagen.se>
Date: Sat, 10 Jun 2000 02:31:48 +0200
References: <Pine.SOL.4.21.0006091446001.23154-100000@famine.OCF.Berkeley.EDU> <000501bfd260$e56ef210$f621ea18@monstrous>
Reply-To: assembly-89@lists.ticalc.org


it's the checksum thats encrypted. and it is checked oncalc in the routine that
write to flash when updateing as far as I know.
You can't get past that...

//Olle

Juan Corral wrote:
> 
> Okay, I'll probaly get yelled at for asking this, but I was wondering if
> anyone had played with the *.89u file in a Hex-Editor and noticed how all
> the BASIC functions are clearly visible.  So my question is, if the ROM is
> encrypted, why can I read that stuff?  Or am I confused, and it's the
> checksum that is encrypted?  If it is the checksum, couldn't we use
> something like GTKTILINK to send it even if the checksum was messed up, much
> like when the graphlink gives you checksum error, but W32Trans4x does not?
> 
> Yeah, I know I full of s***, but I'm curious.
> 
> Juan
> TEOS.TINews.Net @ http://www.tinews.net/teos

References:

Re: A89: Re: Displaying numbers

From: Patrick Davidson <pad@ocf.Berkeley.EDU>

A89: ROM Question

From: "Juan Corral" <juancorral@lvcm.com>

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