Ok, I tried the disk dumper program and all that happened was that the camera rebooted. The menu asked for confirmation of upgrade and went to the "Loading" screen. The screen went black just before the reboot. So aside from rebooting it all went normally like with the leddumpers.
hm.
I expected just black screen accounting infinite loop in tUpdMgr task.
Maybe watchdog mechanism is responsible for reboot.
so there were no new file dUMP.bup on memory card?
maybe subfolder with some special name must be present on card...
so lets switch to plan B:
findout entry points of open,write,close procedures to use dumper2.bin ....
I wonder if I should turn the blue led on at the start of the new tUpdMgr function. At least to be sure that execution reached that far.
good idea