Synthesis of control unit with code sharing and modified linear chains

Abstract

The method of design for compositional microprogram control units with code sharing is proposed. The method is oriented on reduction in the number of PAL macrocells in the combinational part of control unit. The method is based on modification of operational linear chains by some additional control microinstructions, which contain codes of the classes of pseudoequivalent chains. Proposed method is illustrated by an example.