bit address

基本解释

First is the concept of a 32-bit address space, as opposed to a 64-bit address space.
相对于 64 位地址空间，我们首先来看一下 32 位地址空间这个概念。
The SPEs do not have direct access to main memory, but only a small (256K on the PS3) local store (LS) which is in an independent, 32-bit address space.
SPE 不能直接访问主存，只能访问很小一部分（PS3 上 256K）的本地存储 (LS)，LS 是一个独立的 32 位地址空间。
Although the processors can store 32-bit address values, the top eight bits (actually more than eight, on the 68008) are not wired to anything, and have no effect.
尽管处理器可以存储 32 位地址值，但是高 8 位（实际上在 68008 中多于 8 位）并没有被使用，因此这样做也不会产生什么影响。

When Vint and his colleagues chose that 32-bit address space they thought they were just making a simple engineering tradeoff based on a seemingly predictable future.
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The President talked about this a little bit in the weekly address last week, as well.
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As he normally does, he will address that bit of news.
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