I want to use embedded CPU(SoC) to be PCI Adapter processor. Although the SoC supplies many functions(i.e.I^2C,PCI I/F,Memory Controller,etc). But i want use the adapter to "Boot". So only i can do is that use PCI Option(Expansion)ROM . At first,BIOS uses POST code to boot and loading OS . the situation is that SoC of my adapter "does not" have expansion ROM function to support. What can i do? Regards.