Circuit with network of message distributor circuits

Source circuits (10) produce messages that may each be processed by any one of a plurality of processing circuits (14). A network of distributor circuits is provided between the source circuits and the processing circuits (14). Local decisions by the distributor circuits in the network decide for each message to which one of the processing circuits the message will be routed. Messages are supplied to at least two parallel distributor circuits. These distributor circuits (12a) select from further distributor circuits (12b) in the network on the basis of current availability of individual ones of the further distributor circuits (12b). The respective messages are in turn forwarded from the selected further distributor circuits (12b) to data processing circuits (14) along routes selected by the selected further distributor circuits (12b) on the basis of current availability of the data processing circuits (14) and/or subsequent distributor circuits (12c) in the network