SA3_VOL_R         165 dev/isa/ym.c   	ym_mute(sc, SA3_VOL_R, sc->master_mute);
SA3_VOL_R         271 dev/isa/ym.c   	ym_write(sc, SA3_VOL_R, (ym_read(sc, SA3_VOL_R) & ~SA3_VOL_MV) | atten);
SA3_VOL_R         333 dev/isa/ym.c   		ym_mute(sc, SA3_VOL_R, sc->master_mute);