>> Look in apps/settings.h. It contains a giant struct containing all the
>> global config values. Note that order is significant.

Thanks, but it looks like the order in 'global_settings' doesn't matter,
only the order in 'hd_bits' (correct me if I'm wrong).

> There is a config-block-version-counter somewhere as well that only
> needs to be updated if the order is changed.
> If you add some settings <>, you don't break compatibility, so don't touch
> it.

<at the bottom> check.

>> There is a raw HDD config block where the config struct is dumped. It
>> must be read back in the same order it was written.

Check.

>> (disclaimer: I'm a noob when it comes to the rockbox source)
> /me too

me three.

--
gl