A functional unit, coupled to an information processing system, generates configuration interface signals which are decoded to facilitate the selection of one of a plurality of system devices. The selected one of the system devices then provide the proper electrical signals to the coupled functional unit. Many of the electrical signals are common to a plurality of functional units. However, these signals may be assigned to different pins on a system connector for the various functional units. The present invention allows these electrical signals to be dynamically moved to different pins and the use of a standard connector for all functional units with the coupled functional unit using only those signals required. Thus, a single connector can be used for all of the functional units which minimises the use of valuable real estate on a system board.