Strange behaviour of ATmega128 with Arduino framework

[Ralph_PIO]

Thanks for the insight into the implementation details.

Nevertheless I do not agree to

@maxgerhardt

So behavior like

@Ralph_PIO

>   pinMode( ledPin1, INPUT);
  pinMode( ledPin2, OUTPUT);
  pinMode( ledPin1, OUTPUT);
> ```
> -> *no* LED is on

Is expected since calling pinMode() with INPUT will clear the respective bit in the output register of the port. Thus at the next OUTPUT call, PORTB has already been cleared and it will output a 0.

The LEDs are both active low, so a port register bit value 0 should be fine.