VME1_SLAVE_A16
sc->sc_slave[VME1_SLAVE_A16].vr_am = am | VME_AM_A16;
sc->sc_slave[VME1_SLAVE_A16].vr_mask = 0xffffu;
sc->sc_slave[VME1_SLAVE_A16].vr_am = MVMEBUS_AM_DISABLED;