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Date:         Sat, 15 Sep 2007 07:39:41 +0300
Reply-To:     tinker man <tinkerman007@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         tinker man <tinkerman007@GMAIL.COM>
Subject:      ECU firmware location
Content-Type: text/plain; charset=ISO-8859-1


Hi all,


This is kinda getting in-depth into embedded systems design, but does
anybody know if the firmware for our ECU's (Digifant or Digijet)
resides completely on the 2732 EPROM or is part of it contained also
INSIDE the microcontroller itself?
The reason I'm asking this is because I suspect I have a fried
microcontroller (Intel 8049H) but if it's a custom version with
protected firmware inside, replacing it won't solve the problem. My
CPU reads:
MAF 8049H P A167
078801
DSD8905V5 U
WBX82HSCH
(C) INTEL 1977


That WBX82HSCH stuff seems to hint it's a custom version
(WBX=WaterBoxer) with protected firmware, with some of the firmware
also outside in the external EPROM.
Any guru's out there?


Cheers,
TM
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