AR_BEACON_TIM
(OS_REG_READ(ah, AR_BEACON) &~ (AR_BEACON_PERIOD|AR_BEACON_TIM))
| SM(bs->bs_timoffset ? bs->bs_timoffset + 4 : 0, AR_BEACON_TIM)
(OS_REG_READ(ah, AR_BEACON) &~ (AR_BEACON_PERIOD|AR_BEACON_TIM))
| SM(bs->bs_timoffset ? bs->bs_timoffset + 4 : 0, AR_BEACON_TIM)
(OS_REG_READ(ah, AR_BEACON) &~ (AR_BEACON_PERIOD|AR_BEACON_TIM))
| SM(bs->bs_timoffset ? bs->bs_timoffset + 4 : 0, AR_BEACON_TIM)