0x0000和0x3f...等是什么意思?
static struct ac97_chn_desc {int ac97_regnum;
int oss_channel;
int maxval;
int is_stereo;
int oss_mask;
int recordNum;
u16 regmask;
int is_inverted;
} mixerRegs[] = {
{ AC97_MASTER_VOL_STEREO, SOUND_MIXER_VOLUME, 0x3f, ST, SOUND_MASK_VOLUME, 5, 0x0000, INV },
{ AC97_MASTER_VOL_MONO, SOUND_MIXER_PHONEOUT, 0x3f, MO, SOUND_MASK_PHONEOUT, 6, 0x0000, INV },
{ AC97_MASTER_TONE, SOUND_MIXER_TREBLE, 0x0f, MO, SOUND_MASK_TREBLE, -1, 0x00ff, INV },
};
这里面的0x3f,0x000,0x00ff...等是什么意思?
