RCR_AB
mode = RCR_AB; /* accept broadcast packets */
(RCR_AER | RCR_AR | RCR_AM | RCR_AB | RCR_AD | RCR_AAM | RCR_AAP)
if (lp->rcr & (RCR_AB | RCR_AD | RCR_AAM | RCR_AAP | RCR_AM)) {
lp->rcr &= ~(RCR_AB | RCR_AD | RCR_AAM | RCR_AAP | RCR_AM);
mode = RCR_AB /* accept broadcast */