自从1971年第一台微处理机(4004)问世以来,随着超大规模集成电路的飞跃发展,近十年来,微处理机和微型计算机日新月异,已经历了三代产品,并于1980年开始进入第四代。1973年前,以 PMOS 为典型工艺的4位和8位微处理机为第一代,如 Intel 4004,8008;第二代从1973年至1976年以 NMOS 工艺的 Intel 8080,Motorolam6800及Zilog Z-80 8位微处理器(MPU)为代表,这个时期 Since the advent of the first microprocessor (4004) in 1971, with the rapid development of very large scale integrated circuits, microprocessors and microcomputers have undergone tremendous changes in recent ten years and have gone through three generations of products. In 1980, Four generations. Prior to 1973, the 4 and 8-bit microprocessors with PMOS as the typical process were the first generation, such as Intel 4004, 8008; the second generation from 1973 to 1976 with the Intel process Intel8080, Motorolam6800 and Zilog Z- 80 8-bit microprocessor (MPU) as the representative of this period