[Diy_efi] Mopar PCM

[brian.trulove at charter.net]

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Anyway to reverse engineer the application I sent you to see how Chrysler accesses the flash via SCI? Data logger maybe?
> 
> From: "David Cooley" <n5xmt at bellsouth.net>
> Date: 2004/10/27 Wed PM 12:52:31 GMT
> To: <diy_efi at diy-efi.org>
> Subject: Re: [Diy_efi] Mopar PCM
> 
>  As I said, even the factory flash file looks identical to what is in the
> flash proms... it is both flash concatenated into a single file with a
> checksum so the DRB can check for file corruption before it applies the
> flash.  The flash appears to be strictly data, and no code at all.  I ihave
> to set up SCI direct to the CPU's to see if I can dump the ROM.  Once I do
> that I will have a better idea what is going on...  and the info I have is
> not speculation...  I have received it from a person that works for a
> company that assembles, programs, reworks and tests the PCM's for Chrysler. 
> 96 and newer Chrysler PCM's are a totally different animal than the 95 and
> earlier units.
> 
>  
> 
> -------Original Message-------
> 
>  
> 
> From: A list for Do-It-Yourself EFI
> 
> Date: 10/26/04 22:42:52
> 
> To: diy_efi at diy-efi.org
> 
> Subject: Re: [Diy_efi] Mopar PCM
> 
>  
> 
> again a dump wont do you any good. every piece of chyrsler code ive ever
> seen has a copyright in asccii test at the bottom of the rom. these do not.
> the only clear reasoning is that the adress line are muxed or something
> during programming. this is not even remotely beyond the capability of the
> 68hc vriants running in these ecms. 
> 
>  
> 

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