Some time back I embarked on a mission to study the Magneti Marelli 1.3 MJD which is in my other car. As I could not find much resources on it I decided to study the MED9 ecu which is based on the same processor mpc5XX and has similarity with ME7 and lot more resources available. So after months of reversing I have now acquired some understanding of the ECU as to how it refers to maps, RAM variables etc. As of now I am writing a routine to switch maps the same way I did for ME7. Also have plans to add other functions. Now my main question is can the NLS/LC be ported for this ECU, if so how will it be different from the one for ME7. I have identified all the required variables. Will it work if I convert the exact code into this ECU. My knowledge is limited to only the ecu and not the car, what other problems are likely...

Thanks very much , I will send you the  files very soon. I am making a map switch to start with. So ones its confirmed my RAM variables are correct , we will proceed with other . .

My car is DSG

My first attempt at ldrxn switch, 5 maps. Switched by brk/acc but not tested. The second map is a valet map. The three ldrxns in stock location is disabled.
If this works then lc/nls will follow. One file is cksmcorrected the other one is not corrected. Hope somebody can test it for me.

Edit: Removed as I found some mistakes.

mpc5xx (mpc563 i think). yes idapro always

Load the file at 0x400000 and ram from 0x600000 to 0x900000, not accurate but will work.

I never managed to get the TOC correct before, so this was very nice info. Thanks a lot

Good info, but I have a question, maybe someone can help:

On ME7 C16x MCUs there is an 32K IROM section, which contains a boot ROM etc.

Is there anything similar on MPC MCUs as used in MED9?
Or is all the code needed for disassembly stored in the external flash?

Thanks!