fillhdr utility

does anybody have experience with fillhdr utility, which is used in LSK patch (Standard version of module) for NET+OS 6.0e ?

During FW upgrade I would like to check new image of application before writing to flash but I am not able to find out how “image_crc” header is created when fillhdr utility is used. It seems that it’s different from boothdr utility used for Custom version of Connect ME module.

thank you, Michal Dvorak