MVMEBUS_AM2CAP
cap = MVMEBUS_AM2CAP(am);
cap = MVMEBUS_AM2CAP(am);
cap = MVMEBUS_AM2CAP(vmap->vm_am);
cap = MVMEBUS_AM2CAP(am);
vr->vr_am = (attr & VME_AM_ADRSIZEMASK) | MVMEBUS_AM2CAP(attr);