User:Gluo88/PCI Express configuration space

PCI Express configuration space ... PCI Express configuration space contains two portions

• 256-byte PCI Compatible Configuration space header (0x00 - 0xFF) -- (0x00 - 0x3F). The first 64 bytes every PCI device must support. The first 16 bytes are the same for all PCIe devices. -- PCI Compatible Device Specific Configuration Space (0x40 to 0xFF). Just above the 64-byte PCI compatible configuration header (0x40 to 0xFF). • PCIe Extended Config Space (0x100 - 0xFFF). -- specific to PCIe.