digitalPinToPCICR() and other pin-change interrupt macros

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hi,
when patching arduino-based project 1.0, noticed pile of macros pertaining resolving pin-change interrupt port , bit values arduino pin numbers. but, not appear used anywhere (at least in core). inclusion hint there official pin-change interrupt support in 1.0, similar pcint library in playground?

(if not, what's for? these macros seem largely duplicate function of e.g. digitalpintoport() , digitalpintobitmask() (see pcint library above example of usage way).)



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