复杂指令集计算（Complex Instruction Set Computing，简称CISC）是计算机中流行的设计理论；给微处理器增加微码（microcoded）指令，使其能够使用单条复杂的指令来执行越来越多的任务。已有大量机器指令的微处理器结构。
复杂指令集计算机 complex instruction set computer ; CISC ; CISCComplex Instruction Set Computing ; CISC plex instruction set puter
复杂指令集计算机技术 Complex Instruction Set Computer ; CISC
的复杂指令集计算机 Complicated Instruction Set Computer ; Complex Instruction Set Computer
为复杂指令集计算机 Complex Instruction Set Computer
复杂指令集计算机。
它用于复杂指令集计算机微处理器或者单处理机简化指令系统计算机系统的时钟分布。
It is designed to provide clock distribution for CISC microprocessors single processor RISC systems.
例如在20世纪70年代，存储器是以千字节来衡量大小的并且非常的昂贵，复杂指令集计算是主要的计算，因为它保存记忆。
In the 70s of 20th century, for example, memory was measured in kilobytes and was very expensive. CISC was the dominant approach because it conserved memory.
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