* <http://bugs.libre-riscv.org/show_bug.cgi?id=12>
* <https://opencores.org/project,ac97>
* <https://en.wikipedia.org/wiki/AC%2797>
+* <http://hands.com/~lkcl/ac97_r23.pdf> AC97 datasheet
+* <http://realtek.info/pdf/alc850.pdf> example AC97 8-channel datasheet
+
Question: how does AC97 fit in with [[I2S]]?