Assign multiple outputs to individual inputs via shift registers

Other Hardware LEDs and Multiplexing
3

sterretje:
Use an XOR

byte changedBits = oldBits ^ newBits;

For each bit that has changed, changedBits will contain a 1; non-changed bits will be 0.

I am already doing the XOR comparison to see if the byte changed, how do I get the position that changed ? Do I just iterate through the byte and look for the 1's ?

I will look at your other suggestion as well - thanks.