RTCSB_INTR_MASK
vrtc_regb_write(vrtc, rtc->reg_b & ~(RTCSB_INTR_MASK | RTCSB_SQWE));
const bool intr_enabled = (rtc->reg_b & RTCSB_INTR_MASK) != 0;
ASSERT0(events & ~(RTCSB_INTR_MASK));
if ((rtc->reg_b & RTCSB_INTR_MASK & rtc->reg_c) != 0) {
if (changed & RTCSB_INTR_MASK) {