Ok,
therefore using automatic bankswitching should be done with caution, as 
it could potentially result in a ridiculous number of unnecessary BBR 
writes - say if I access a lot of variables in bankswitched area and 
call functions that doesn't touch BBR.

For interrupts yeah it makes complete sense that the BBR should be 
saved/restored like any other register for that matter.

Still it's nice to have this feature available if you know it's limits.

Regards,
Jonathan


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