它具有一个18位的地址空间，可以访问256kb的本地存储器，后者是芯片本身的一个部分。
It has an 18-bit address space that accesses 256kb of local store that are part of the chip itself.
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.
MMU的功能是控制各种存储系统的工作并将虚地址转换成物理地址，以及控制存储器访问权限。
The functions of the MMU are to control the various memory systems, translate the virtual addresses into physical addresses and control the access permission.
从分析存储器操作数的存放地址入手，可以更好地理解寻址方式，准确访问存储器操作数。
We can understand the addressing mode better and call it correctly by analyzing the storing position of memory's data operation.
在访问主存前，必须将虚拟存储器地址转换为实际存储器地址。
The virtual memory addresses must be translated into actual memory addresses before main memory is referenced.
在访问主存前，必须将虚拟存储器地址转换为实际存储器地址。
The virtual memory addresses must be translated into actual memory addresses before main memory is referenced.
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