A processing device includes one or more resources, a plurality of peripheral bus interfaces that support resource sharing with a plurality of other processing devices, a primary routing resources and a node ID register. The primary routing resources are programmable with a plurality of address ranges. The processing device is operable to determine a routing of peripheral bus transactions among the plurality of peripheral bus interfaces based upon a destination address of the peripheral bus transaction and primary routing resources contents. The node ID register is programmable with a plurality of override indications. The processing device is operable to determine an override routing of peripheral bus transactions among the plurality of peripheral bus interfaces based upon a destination node ID of the peripheral bus transaction and node ID register contents.