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Car Audio Bin service manual for Grundig 2841 VD -9346

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at 13:55Most straightforward way would be to use the ISP prgraommer that's used to write the firmware to also write EEPROM, I'm sure there are examples out there if you google something like avrdude write eeprom .Another way would be to change the firmware so that after a delay, it resets and shows itself as custom USB device and you have custom PC side SW to update the password. But I don't know how that is done exactly myself, either. dj_sa says:December 2, 2012 at 8:37I made mine respond to USB packets to change the stored password with the user inputs. You'd still need an ISP to programme the firmware in though. Check out Joonas' latest for details.
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