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AC'97 - Wikipedia
https://en.wikipedia.org/wiki/AC%2797#:~:text=AC%2797%20defines%20a%20high-quality%2C%2016-%20or%2020-%20bit,20-bit%20stereo%20resolution%20for%20multichannel%20recording%20and%20playback.
Audio Codec ‘97
https://www-inst.eecs.berkeley.edu/~cs150/Documents/ac97_r23.pdf
Typical values should be 40 nsec for 10% to 90% of DVdd with a 50 pF load. In addition, the device must sink 2-4 mA at a maximum level of 0.4 V and must source 2-4 mA at a minimum level of …
AC97 Description, Audio Codec AC97 Specification, AC97 pinout
http://www.interfacebus.com/AC97_Audio_Standard.html
AC '97 Description. The Audio Codec specification released in 1997 [AC '97] defines the Architecture and Digital Interface, specifically designed for implementing audio and modem I/O functionality in Personal Computers. Companion specifications include the Modem Codec [MC '97], and the combined Audio/Modem Codec standard [AMC '97].
AC97 - OSDev Wiki
https://wiki.osdev.org/AC97
1 Detecting AC97 sound card; 2 Native Audio Mixer registers. 2.1 0x00 Reset Register; 2.2 0x02 Master Volume; 2.3 0x0E Microphone Volume(gain) 2.4 0x18 PCM output volume; 2.5 0x1A Select record input device; 2.6 0x1C Record Gain; 2.7 0x1E Record Gain of Microphone; 2.8 Extended capabilites registers; 3 Native Audio Bus Master registers. 3.1 0x2C …
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