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多道程序设计的硬件基础是什么?多道程序设计的特点是什么?

问答题
2022-01-05 07:23
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正确答案

多道程序设计的硬件基础是中断系统和通道技术,从而实现了CPU与通道之间、通道与通道之间以及设备之间的并行操作,大大提高了系统的效率。多道程序设计的特点是:
(1)多道——主存中存放两道或两道以上的程序;
(2)宏观上并行——在一个时间段,它们都在同时执行,都处于执行的开始点和结束点之间;
(3)微观上串行——在某一时刻,他们在同一台计算机上交替、轮流、穿插地执行。


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