Re: [jornada] Jornada Flashboard

From: Nick L <chiark_at_gmail.com>
Date: Tue, 21 Jun 2005 12:14:44 +0100

Mark,

Is there any worth in adding a small chip which could be used to
bootstrap the machine if the flash was completely empty? I am
thinking that the code would be fairly simple - check for presence of
bootable entries on the flash, and then execute as appropriate after
moving itself out of the way. If no code exists, or the user was
pressing a certain key combo, it could interact with the user via a
terminal on the serial port...

The programming of this chip would never need to change, but it could
provide a way to recover from experimentations gone wrong... I am
thinking that this would make programming new kernels etc via the end
user a huge amount easier, and also provide for a recovery path
without requiring a programmer.

Could this be achieved by masking off a portion of the ROM for
strapping purposes, rather than having a separate chip?

Is this a complete flight of fantasy on my part :-) ?

Cheers,
Nick.

-- 
"Why don't you go and bother that nice Ms Rowling?" - Terry Pratchett
http://www.chiark.com
Received on Tue Jun 21 2005 - 07:19:37 EDT

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