KOKUSAI CXP-544A KOMS-A2 控制器主板

产品技术要求：

控制器CXP-544A KOMS-A2 分组合逻辑控制器和微程序控制器，两种控制器各有长处和短处。组合逻辑控制器设计麻烦，结构复杂，一旦设计完成，就不能再修改或扩充，但它的速度快。微程序控制器设计方便，结构简单，修改或扩充都方便，修改一条机器指令的功能，只需重编所对应的微程序；要增加一条机器指令，CXP-544A KOMS-A2 只需在控制存储器中增加一段微程序，但是，它是通过执行一段微程。具体对比如下：组合逻辑控制器又称硬布线控制器，由逻辑电路构成，完全靠硬件来实现指令的功能。

Controller CVP-544A KOMS-A2 consists of combinational logic controller and microprogram controller. The two controllers have their own advantages and disadvantages. The composite logic controller, CVP-544A KOMS-A2, is cumbersome in design and complex in structure. Once the design is complete, it cannot be modified or expanded, but it is fast. Microprogram controller is convenient in design, simple in structure, easy to modify or expand, modify the function of a machine instruction, only need to reprogram the corresponding microprogram; To add a machine instruction, the CVP-544A KOMS-A2 simply adds a microprogram to the control memory, but it does so by executing a microprogram. The specific comparison is as follows: combinational logic controller, also known as hardwired controller, is composed of logic circuit, completely rely on hardware to achieve the function of instructions.

控制器CXP-544A KOMS-A2组合逻辑控制器由时序电路、指令译码电路和组合逻辑电路三部分组成。通过指令译码器确定当前执行的指令，结合时序电路产生的节拍，共同作为组合逻辑电路的输人结果输出相应的控制信号。组合逻辑控制器是由复杂组合逻辑门电路和触发器构成，执行速度快，因此在计算机结构比如RISC中得到广泛应用。

Controller CVP-544A KOMS-A2 combinational logic controller is composed of sequential circuit, instruction decoding circuit and combinational logic circuit. Through the instruction decoder to determine the current execution of the instruction, combined with the timing circuit generated by the beat, together as the input result of the combinative logic circuit output corresponding control signals. Combinatorial logic controller is composed of complex combinatorial logic gate circuit and flip-flop, and has high execution speed, so it is widely used in computer structures such as RISC.