The PCI Express Endpoint Block Plus Core v1.1 was inadvertently shipped on the 9.1i DVD. Can this core be used?
No, this core is not officially available for 9.1i until the IP Update 1 release in February, 2007. Please continue using the 8.2i SP3 with IP Update 3 until the 9.1i IP Update 1 release is available. See (Xilinx Answer 24380) for more information.