Ok, I think I'm finally getting to grips with what I need to do.
I need to remove the crystals that are connected to the MX8330s on my mb, for example in pos C39 (pin 5&6 on osc). I then hook up pin 5&6 to the FPGA and use that instead of 2 new crystals, and I do the same to both MX8330.
Does that sound about right?
Still waiting for parts from China :'(
About right, but you only need to connect one of the MX8330 pins to the FPGA. I do not know which one, marshallh said to just give it a try.
I think as a start we can only change the clock for one of the MX8330 chips. The one we would change is the one that generates the video frequency. As a start I think I will try to hook up an oscillator directly to the MX8330. Allthough, in that case you might as well use a crystal, but the oscillator will later be fed to an FPGA I guess, so we can mux between them.
Maybe I will first try a crystal, if I can get that easier.