Corvette CCM Reverse Engineering Anyone?

[kur4o]

Found 3 subroutine that write data to eeprom, first one is in the main code[I guess it updates eeprom on some regular basis, OCI1 triggered].

The other 2 are very intersting. They should be triggered when mode 2 and mode 3 is sent to ccm.

However when mode 2 and mode3 is requested it is handled by totally different procedure and the code will never run with these 2 eeprom write subroutines. They are really F_d up, and hard to guess what they do. I wonder if you enable mode 5 and make a jump to this piece of code what will happen. Maybe some reseting of the eeprom area[blank out].

I will keep digging.


Edit: the pin needs to be shorted only when you enter mode5. After that there is no need to be kept. In the loop aa response comes from different place.
It just indicates OK[ccm unlocked]