一种处理过程，其间由控制器将一条指令分解成为它的执行所必须的微码操作。
A procedure in which an instruction is broken down into the microcode operations necessary for its execution by a control unit.
在协处理器中，微程序控制器的微码控制是协处理器指令译码的控制核心。
The executing of the microcode function of the microprogram controller is very crucial to the instructions decoder in the coprocessor.
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