MICVR_20dB_BOOST
v |= MICVR_20dB_BOOST;
v &= ~MICVR_20dB_BOOST;
ac_clr(ac, AC97_MIC_VOLUME_REGISTER, MICVR_20dB_BOOST);
ac_set(ac, AC97_MIC_VOLUME_REGISTER, MICVR_20dB_BOOST);
ac_set(ac, AC97_MIC_VOLUME_REGISTER, MICVR_20dB_BOOST);
ac_set(ac, AC97_MIC_VOLUME_REGISTER, MICVR_20dB_BOOST);
ac_clr(ac, AC97_MIC_VOLUME_REGISTER, MICVR_20dB_BOOST);
ac_set(ac, AC97_MIC_VOLUME_REGISTER, MICVR_20dB_BOOST);
ac_set(ac, AC97_MIC_VOLUME_REGISTER, MICVR_20dB_BOOST);