I need help. I am neither a programmer, nor an electrical engineer, but I am willing to learn if I only knew where to start.

The G4 Cube was famous for having no internal audio. However I have found that the motherboard has a DAC, Amp, and speaker connector. I want to see if I can get sound working from the initial startup chime to a usable audio device in both OS 9 and OS X. The problem is that I don't know much about Apple's implementation of openfirmware, I don't know how to use i2c protocols, I don't know how to disassemble the cube firmware available to download, nor how to dump all the firmware (including the parts that initially load OF) off the cube, I don't know how to program for the Cube chipset, and I have never done signal analysis.

But, as I said, I'm willing to learn. Thing is the Cube is over 20 years old so anything to learn the cube specific things are hard to find, and for signal analysis I don't know where to start.

I have access to a DS1104z-plus scope, I have no problem with surface mount soldering. I just don't know where to start, nor where to find the technical documentation for the Apple PowerPC New World ROM platform.

Can anyone point me in the right direction to actually make headway on this?


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