You got me wrong...
I wasn't planning to re-invent the wheel (i.e. design and build my own
ISCU), just fix those darn (original) ECU and ISCU...

On 9/15/07, pdooley <psdooley@verizon.net> wrote:
> Sudhir, I was thinking the same thing.
> The amount of brainwork going into this project is more than just changing
> to MS.
> However, if these talented individuals can design and build their own ISCU
> to interface with the stock ECU, well that would be good for the entire
> Vanagon community.
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> Sudhir Desai
> Sent: Saturday, September 15, 2007 9:32 AM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: ECU firmware location
>
> 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
> >
>