Abstract: A data processing system constituted by at least two subsystems, each having at least an integrated combinational logic unit comprising a storage and input/output gates and with which at least two control units are connected. The subsystems are constructed using integrated semiconductor techniques. Peripheral units are connected to the input/output gates. The data path between the control units, among one another or between one control unit and the peripheral units, is routed, respectively, over the storage or over the input/output gates to which the relevant peripheral units are connected. The control unit supplies data signals which cause the aforementioned data path to be completed.

Abstract: A data handling apparatus of solid state construction for a data processing system. The apparatus has a storage and input/output gates for peripheral units. The storage includes input and output counters for generating storage addresses which, respectively, determine a location for useful data to be temporarily stored while in transit and a location to which such data is to be emitted. The counting modes can be switched to accomodate connecting two or more units of the data processing system. A comparator is connected to the counter outputs and produces therefrom an indication of the state of occupation of the various storage locations.