From: [EMAIL PROTECTED] on behalf of Emre Turkay
Sent: Thu 5/17/2007 5:25 AM
To: [email protected]
Subject: Re: Making Neo Brickproof, was comments after reading Wiki
I would strongly support putting a no-way-writable ROM chip as this first level boot loader. If there is no such option, I really wonder what is my option if somehow it gets screwed up, other than the trash can? Is there an always working solution to reset my moko?
Emre Turkay
Simon Matthews wrote:
> It seems to me as someone who designs and makes embedded devices (mainly
> using the Freescale MC9S12 processors) that you need another lower level
> bootstrap loader that is small,
Ah yes, we've been through that idea as well :-)
We rejected it, because we don't want to have yet more code
duplicating functionality found elsewhere to maintain. Besides, it
wouldn't be all that trivial, given that we don't have any "simple"
interfaces. (Anything that needs a debug board or other fancy
adapters doesn't count.)
Also, there really isn't much difference between a few protected
bytes or hundreds of protected kilobytes. We need an extra chip
anyway, and if we want something reasonably small and modern, it'll
have plenty of space. Thus there's no penalty in using it.
But yes, the "small loader" approach works well enough in other
contexts. I've used it myself.
- Werner
--
_________________________________________________________________________
/ Werner Almesberger, Buenos Aires, Argentina [EMAIL PROTECTED] /
/_http://www.almesberger.net/____________________________________________/
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