mf_ierb
MFP->mf_iera = MFP->mf_ierb = 0;
MFP2->mf_iera = MFP2->mf_ierb = 0;
MFP2->mf_ierb |= IB_SCDM;
MFP->mf_ierb |= IB_DINT;
MFP->mf_ierb &= ~IB_TIMC; /* Disable timer inter. */
MFP->mf_ierb |= IB_TIMC; /* Enable timer interrupts */
MFP->mf_ierb |= IB_DINT;
#define fdc_ienable() MFP2->mf_ierb |= IB_DCHG;
MFP2->mf_ierb &= ~IB_DCHG;
MFP->mf_ierb &= ~IB_AINT;
MFP->mf_ierb |= IB_AINT;
MFP->mf_ierb |= IB_PBSY;
MFP->mf_ierb &= ~IB_PBSY;
MFP->mf_ierb |= IB_SCTS|IB_SDCD;
sv_ierb = MFP->mf_ierb;
MFP->mf_ierb &= ~IB_DINT;
MFP->mf_ierb = sv_ierb;
MFP->mf_ierb &= ~IB_DINT;
MFP->mf_ierb |= IB_DINT;
single_inst_bset_b(MFP->mf_ierb, IB_ISA1);
MFP2->mf_ierb |= iinfo_p->imask;
MFP2->mf_ierb &= ~iinfo->imask;