WR2_VEC86
setsioreg(sc->sc_ctl, WR2A, WR2_VEC86 | WR2_INTR_1);
setsioreg(sio, WR2A, WR2_VEC86 | WR2_INTR_1);
sioreg(WR2A, WR2_VEC86 | WR2_INTR_1); /* Set CPU BUS Interface Mode */