它包括两个部分:一个内存地址以及一个索引寄存器。
索引寄存器会与某个指定的地址相加,结果用作访问内存时使用的地址。
The index register is added to the specified address, and the result is used as the address for the memory access.
物理地址(处理器用于索引物理ram的地址)的大小限制了可以寻址的内存。
The size of the physical address (the address used by the processor to index physical RAM) limits the amount of memory that can be addressed.
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