AC97_REG_MASTER_TONE  168 dev/ic/ac97.c  		AC97_REG_MASTER_TONE, 4, 8, 0, 0, 0x0f0f
AC97_REG_MASTER_TONE  172 dev/ic/ac97.c  		AC97_REG_MASTER_TONE, 4, 0, 0, 0, 0x0f0f