VR_F_TXPAUSE
if ((sc->vr_flags & VR_F_TXPAUSE) != 0) {
sc->vr_flags &= ~(VR_F_LINK | VR_F_TXPAUSE);
sc->vr_flags &= ~(VR_F_LINK | VR_F_TXPAUSE);
sc->vr_flags &= ~(VR_F_LINK | VR_F_TXPAUSE);
sc->vr_flags |= VR_F_TXPAUSE;