PPE用载入和存储指令访问主存储器(有效地址空间)，可以在主存储器与内容可以缓存的私有寄存器文件之间移动数据。

The PPE accesses main storage (the effective-address space) with load and store instructions that move data between main storage and a private register file, the contents of which may be cached.

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一个存储器地址是由输出到适宜的总线上的二进制数据所组成。这个总线我们称为地址总线。

A memory address consists of binary data being output on an appropriate bus which we call the address bus.

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在一些系统中，指令存储器比数据存储器更大，所以指令地址的宽度要高达数据地址。

In some systems, there is much more instruction memory than data memory so instruction addresses are wider than data addresses.

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