CD1400_MSVR2_CD
if (ISSET((cy->cy_carrier_stat ^ modem_stat), CD1400_MSVR2_CD)) {
ISSET(cy->cy_carrier_stat, CD1400_MSVR2_CD))
if (msvr & CD1400_MSVR2_CD)
CD1400_MSVR2_CD) != 0);
if( msvr & CD1400_MSVR2_CD ) bits |= (cd->cd_parmode ? 0 : TIOCM_CD);
carrier = ISSET(msvr, cd->cd_parmode ? CD1400_MSVR2_DSR : CD1400_MSVR2_CD);