CAMADDR_CAMEN
writeb(CAMADDR_CAMEN, ®s->CAMADDR);
writeb(CAMADDR_CAMEN | CAMADDR_VCAMSL, ®s->CAMADDR);
writeb(CAMADDR_CAMEN | idx, ®s->CAMADDR);
writeb(CAMADDR_CAMEN | CAMADDR_VCAMSL | idx, ®s->CAMADDR);