WATCH_QUEUE_NOTE_SIZE
offset = note % WATCH_QUEUE_NOTES_PER_PAGE * WATCH_QUEUE_NOTE_SIZE;
#define WATCH_QUEUE_NOTES_PER_PAGE (PAGE_SIZE / WATCH_QUEUE_NOTE_SIZE)
if ((bit & (WATCH_QUEUE_NOTE_SIZE - 1)) == 0)
bit -= WATCH_QUEUE_NOTE_SIZE;
bit /= WATCH_QUEUE_NOTE_SIZE;