Hard-wired controllers are a method of early computer design. The hard-wired controller is a logic circuit that makes the control component generate a special fixed timing control signal and generates various control signals, so it is also called a combined logic controller. This logic circuit is designed to use the fewest components and achieve the highest operating speed. Because this logic circuit is a complex tree network composed of gate circuits and flip-flops, it is called a hard-wired controller. The hard-wired controller is mainly composed of combinational logic network, instruction register and instruction decoder, beat potential / beat pulse generator, etc. The block diagram of the structure of the hard-wired controller is shown on the right. The combination logic network generates all the operation commands required by the computer, which is the core of the controller.