Modification of Elementary Operational Linear Chains in Compositional Control Unit with Code Sharing

The new design method for compositional microprogram control units with code sharing and elementarization of operational linear chains is proposed. The method targets on reduction in the number of LUT-elements in the combinational part of control unit. Some additional control microinstructions containing codes of the classes of pseudoequivalent chains are used for operational linear chains modification. Proposed method is illustrated by an example. Most desirable GSA characteristics for using proposed method were obtained.