SigmaStudio for SHARC - how to access DAI ports directly


I am using ADSP-21479  EZ board and would like to bypass the on board codec and connect the DSP to digital input amplifier via the onboard expansion connector. Most of the DAIs if not all are available on this port so it should be possible. The SigmaStudio for SHARC has a default configuration mating the onboard codec which is not enough for my application. The SigmaStudio for SHARC User's Guide mentions that source code needs to be changed (and I'm assuming recompiled) in order to reconfigure audio IO. This sounds more complicated than it needs to be, but if this configuration is hard coded then is there any documentation on which files need to be changed. Are there any examples? Has anyone successfully done this?

Second question is related to SPORT capacity on ADSP-21479 and 21489. The DSP manual states there are 8 SPORTS on these parts. My application pushes me toward I2S connection instead of TDM (it is a hack and I prefer to keep the clk freq lower). My understanding is that each of the 8 ports has 2 data lines and each of the data lines in I2S mode can transmit two audio channels which equates to 4 audio channels per SPORT. This would mean 32 audio channels in I2S mode for the entire chip. This is sufficient for my application and I wanted to confirm if my understanding is correct.