描述
控制规模还与内存区的大小有关。规模大,用户程序长,要求有更大的用户存储区。同时点数多,系统的存储器输入、输出的信号区(输入输出继电器区或称输入、输出映射区)也大。这个区大,相应地内部器件(解释见后)也要增多,这些都要求有更大的系统存储区。
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