Abstract: A method for interrupting the execution of a keyboard macroinstruction by a central processor to permit execution of non-keyboard macroinstructions when no external data is present in the central processor keyboard buffer. Auxiliary registers are provided mirroring critical registers used by the central processor for processing both keyboard and non-keyboard macroinstructions. The central processor interrogates the keyboard buffer to ascertain entered data. If no entered data is present, a non-keyboard macroinstruction is executed. If entered data is present, it is processed. Values are continuously exchanged between the auxiliary and critical registers to maintain the proper values for executing both keyboard and non-keyboard macroinstructions.