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Performance is likely not that much of a concern in this application but I would definitely implement this as a single 64 bit integer (or maybe two 32 bit integers) and use boolean logic on it to compare and work with it. "old integer" EXOR "new integer" != 0 will tell you if something has changed and then you can eventually detect which bits changed too. It's a little bit more mathematics than trying to do it with a boolean array but works much faster and with less code.

http://digital.ni.com/public.nsf/allkb/5AE4ADCBB65A6D8F86256FBF007A1AC1