1. A control apparatus for a processing machine including a plurality of means for executing additional machine functions, said apparatus comprising: computer means including memory means; a plurality of manually controlled input devices selectively operable during computer-controlled processing of a workpiece for generating at selected times during the computer-controlled processing of a workpiece control signals for the plurality of executing means; interfacing means interposed between the input devices and the executing means and coupled to the computer means for enabling the computer means to read the state of the plurality of input devices and to selectively activate and deactivate the plurality of executing means; means for manually selecting a first mode of operation of the computer means in which the computer means continuously controls the processing of a first workpiece according to processing information stored in the memory means and wherein the computer means during the continuous computer-controlled processing of the first workpiece reads and stores the state of the plurality of input devices and the executing means are activated and deactivated during the computer-controlled processing of the first workpiece to correspond to the current state of the plurality of input devices; and means for manually selecting a second mode of operation of the computer means in which the computer means during the computer-controlled processing of a subsequent workpiece activates and deactivates the executing means in accordance with the previously stored state of the plurality of input devices, independently of the current state of the plurality of input devices.