Checksum questions

[Ross Myers]

>DC Smith wrote:
>>
>> The checksum is pretty easy to come up with. Just zero out the first
>> two bytes in the prom, then read it off the edit program, and insert it
>> into the first two locations.
>
>...but only for certain C3 ECMs.  1227747's are different.  And P4's are
>different yet again.
>
>--
>Ludis Langens                               ludis (at) cruzers (dot) com
>Mac, Fiero, & engine controller goodies:  http://www.cruzers.com/~ludis/


And then there's more, in certain Holden Memcals, PCM checks between $5000 -
$FFFF, but the C.S Value is at $6006,$6007, you must then subtract between
$6000 - $6007.

Ross Myers


----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org