Comment 71 for bug 1487168

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Raymond (superquad-vortex2) wrote : Re: [Emulated AD1980 AC97 inside Virualbox 5.0, playback] volume slider problem

Bit = 1 ID0 ID1 ID2 ID3 ID4 ID5 ID6 ID7 ID8 ID9

Function Dedicated Mic
PCM In Channel
Modem Line Codec Support
Bass and Treble Control
Simulated Stereo (Mono to Stereo)
Headphone Out Support
Loudness (Bass Boost) Support
18-Bit DAC Resolution
20-Bit DAC Resolution
18-Bit ADC Resolution
20-Bit ADC Resolution

AD1980
0 0 0 0 1 0 0 1 0 0

a reset register of real ad1980 return 0x0090 which indicate 20 bit DAC resolution and Headphone support

but enumerated ad1980 return 0