[Solved] using a mask bit dallas rtc

Well, I'm gonna admit to not really being a programmer or having indepth knowledge of C macros & classes & things like

value |= _BV(6) | _BV(4);

without having to look them up somewhere every time. I'll stick with my more expanded form and let the compiler deal with it 8)
Drives my wife nuts - I tell her I've never written a function or macro or class or a library - she'll counter that I use them all the time. Yes, but I've never written one!