地址总线被处理器用来选择在特定外设中的存储器地址或寄存器。
The address bus is used by the processor to select aspecific memory location or register within a particular peripheral.
因为大多数设备是分开的CPU总线，慢得多的发送数据跨比写信给CPU寄存器或内存(缓存)。
Because most devices are separated from the CPU by a bus, which is much slower to send data across than it is to write to CPU registers or (cached) memory.
当访问内存位置或寄存器时，在地址总线上的真实的地址。
The actual address that is placed on the address bus when accessing a memory location or register.
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