如何设计一个简单的CPU

本文是 John Carpinelli 写的《Computer Systems Organization and Architecture》一个章节，讲述了如何设计一个简单的CPU，通俗易懂。
6 CPU Design



A s we saw in Chapter 4, a CPU contains three main sections: the register sec-
tion, the arithmetic/logic unit (ALU), and the control unit. These sections work to-
gether to perform the sequences of micro-operations needed to perform the
fetch, decode, and execute cycles of every instruction in the CPU’s instruction set.
In this chapter we examine the process of designing a CPU in detail.
To demonstrate this design process, we present the designs of two CPUs,
each implemented using hardwired control. (A different type of control, which
uses a microsequencer, is examined in Chapter 7.) We start by analyzing the
applications for the CPU. For instance, will it be used to control a microwave oven
or a personal computer? Once w