Foxflash user feedback:
Foxflash Read and Write Marelli mjd 8ds in jtag mode successfully
Read by fox ok
Write by Fox ok
Checksum by fox ok
You can also do full system no need to open the ecu.
if I did a full read but only needed flash while writing.
MJD 8DS jtag pinout to foxflash
To read and write use the following driver