IEVME_HADDR
iev->pectrl & IEVME_HADDR, iev->peaddr);
rampaddr |= ((iev->status & IEVME_HADDR) << 16);
read_iev(vsc, pectrl) & IEVME_HADDR,
rampaddr = rampaddr | ((read_iev(vsc, status) & IEVME_HADDR) << 16);