1. A host-to-I/O bridge, comprising: core logic, the core logic including: interfaces for at least two host buses adapted to couple a central processing unit(s) and the host-to-I/O bridge; and interfaces for at least two I/O buses adapted to couple at least two I/O devices and the host-to-I/O bridge, wherein the at least two I/O buses are defined as the same logical bus number.