A method and an apparatus for improving the speed of executing instructions and reducing the microprogram memory requirements in a conventional digital computer system. The method or apparatus incorporates the use of a predetermined bit position in the microinstruction word which is set to a binary one when the microword is the last microword of an executing microprogram. The apparatus is responsive to the electronic representation of the binary one signal to cause the microinstruction execution sequence to branch to a predetermined location in the microprogram memory for execution of the following microinstruction; thus, eliminating at least one step in returning to a common address for starting the execution of another microprogram.