OK I tried that and no luck. If I use Nick Gammon's sketches I can read the information frrom the target board. But when I try to burn the bootloader using his sketch it doesn't work because he didn't update the board signatures and the ATmega1284P signature is not there so the program aborts before doing anything especially unlocking the memory for update. The board part numbers and bootloaders have been updated but they can't be loaded because the device signature is not updated.
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