This chapter examines the system unit . The motherboard is introduced, and the CPU and its components—the control unit and the arithmetic/logic unit—are described. Students learn about, popular microprocessors, registers, the system clock, processor installation and upgrades, coprocessors, and parallel processing. They discover how data is represented. Different types of memory, including RAM, RAM cache, ROM, and CMOS, and the importance of memory access time are explored. Students find out how expansion slots and expansion cards, ports are used to connect devices to the motherboard.
这一个章节调查系统单位。 主板被介绍, 和处理器和它的成份-控制单位和算术/逻辑单位-被描述。 学生学习, 流行的微处理器、寄存器、系统时钟，处理器安装和升级，共处理器, 和平行处理。 他们发现数据如何被表现。 记忆的不同类型, 包括随机存取储存器, 随机存取储存器隐藏所、 ROM 和互补型金属氧化半导体, 和记忆通路时间的重要性被探究。 学生发现扩充如何安插和扩充卡片，港口用来把装置连结到主板。
(金山快译2007的结果，不太通顺，自己捋捋吧。)
(金山快译2007的结果，不太通顺，自己捋捋吧。)
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