Hi guys,

after being desperate on trying every hint and hack, every kext and following the guide of Taruga. I still had no luck. The AppleHDAControler seemed to load but not the AppleHDADriver.
So I decided to do a little 2 weeks research by myself, and eventually it works!

I can't upload, so the kext can be found here:
http://www.mediafire.com/?3fgnmmiv0yb

Disclaimer:
• This kext is based on Apples current Audio Update for 10.4.10 (kext version 1.3.3). It may work on older systems or not.
• Another thing: it seems to be very difficult to write a generic driver for the audio codecs, because the pathmaps seem to differ depending on the number of jacks you have on your board.
• One last thing: you should mute your speakers while the initialization (at booting the OSX) there are some cracking noise. Until now, I couldn't find out how to suppress this.

First, thanks to Taruga who has made a very good guide for AppleHDA hacking.

Things to do:
• If someone could help me, I would pack this one into an Installer package. Maybe skippyretard will add a package to his thread...
• not all jacks the codec supports are in the pathmap right now, because I only have 4 rear jacks to test
• 5.1 sound? I can't imagine how one could realize 5.1 sound with only 3 analogue jacks and one spdif, but this maybe possible somehow :-)

What is supported:
• commell LV-677 utilizing an intel 945GM/ICH7 with 3 Jacks (Line-in, Mic, Line-out) and SPDIF-out (optical)
• As the codec is documented I guess at least all boards with ICH7 and Realtek ALC880 Codec should work.

What's working by now:
• line-out with full volume and balance control
• spdif out
• line-in with gain control
• mic with gain control and ambient noise reduction. Mic is pre-amp'ed

What do you need:
• ALCInject
• this AppleHDA.kext
• luck :-)

The easiest way to install this:
• Use one of the alc88x packages to install ALCInject (e.g. http://forum.insanelymac.com/index.php?sho...&hl=alc883)
• Change the string DAAAAA== to NAAAAA==
• remove AppleAzaliaAudio.kext and AppleHDA.kext from your /System/Library/Extensions folder
• copy the AppleHDA.kext to your /System/Library/Extensions folder
• repair permissions, restart and cross fingers :-)


Documentation used:
• a self created codec dump of my sound codec using knoppix (cat /proc/asound/codec#0 >codec.dump)
• Taruga's HDA guide http://forum.insanelymac.com/index.php?sho...9&hl=alc883
• Documentation (Datasheet) from Realtek: http://www.realtek.com.tw/downloads/downlo...;Downloads=true

For the ones who want to adapt this kext to other codecs, here is what I've done:
• AppleHDA binary:
As described in Toruga's guide you have to patch the binary to match your codec. In my case exchanging the 2 occurrences of the original ALC885 codec (0x10EC0885) didn't work. So I tried something else. I changed the 3 occurrences of the sigmatel codec (0x83847680, search for 80768483) to the one of the realtek acl880 (0x10EC0880, insert 8008EC10).
• AppleHDAControler plist:
The original AppleHDAController plist already contained an entry for ICH7 but the codec ID was a Sigmatel (0x83847680, decimal: -2088470912 or 2206496384). So I changed this to the realtek alc880 (0x10EC0880, decimal: 283904128).
• ALCInject:
I tried all LayoutID's and injected them with ALCInject. I found only one that at least loaded the AppleHDADriver and gave some cracking noise to the speakers. Now I knew, I'm almost there :-). It was LayoutID 52 (0x34)
• AppleHDA plist:
I copied the Pathmap of LayoutID 52 (pathmap 18) to a new pathmap 19 and pointed the Layout 52 to it. Then I did some trial and error and used Taruga's Guide and my linux codec#0 dump to add more and more parts of the codec.

Greetings MacDanger