GM Code Location

[Alexander Wenning]

martin at mgass.demon.co.uk schrieb:

> Carl wrote about checksums :
>
> ...Looks to me like most data areas and even the code is protected by 
>
> checksums ?
>
> ..Sounds right to me....some time ago I worked on a mil project with 
>
> an ex. Delco guy and he wanted to checksum code, data,.. everything !

As far as I know most ECU´s don´t calculate the checksum of the whole binary 
file. I guess they calculate the checksum pagewise. So if you modify a map the 
correction of the checksum should be done somewhere near your modifications.

Regards

Alex Wenning
wenning.motorsport at t-online.de