Check out the linux source for some tips. It looks like the alc256 is a alc269 variant, so expect the register space to be similar. If you can, dump the verbs etc from linux. 


On Fri, Nov 6, 2020 at 6:55 AM Andy Pont <> wrote:
Hello all,

A bit of a long shot… does anyone have a datasheet for the ALC256 HDA
audio CODEC?

I know that the device exists as I have some boards with it on (that I
am working on a Coreboot port for) on my desk but a look on the Realtek
website doesn’t yield anything.



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