Date:         Sat, 15 Sep 2007 09:31:56 -0400
Reply-To:     Sudhir Desai <sudhir.desai@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Sudhir Desai <sudhir.desai@GMAIL.COM>
Subject:      Re: ECU firmware location
Comments: To: tinker man <tinkerman007@gmail.com>
In-Reply-To:  <1b0df96d0709142139j2f7e1e39i34c8fd5c4d3fec22@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

You could always install a Megasquirt, and not have to worry about any
of this. :D

Sudhir

On 9/15/07, tinker man <tinkerman007@gmail.com> wrote:
> 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
>