Agreed, excellent! 
Even the just first 16, $0000-$00010 could be interesting. If the ELRO switch turned on a spare 5V phone adapter that the Arduino detects, could you could just leave it running and log any discovered "switching" results?
Agreed, excellent!
Even the just first 16, $0000-$00010 could be interesting. If the ELRO switch turned on a spare 5V phone adapter that the Arduino detects, could you could just leave it running and log any discovered "switching" results?