字地址格式最常用。在这种格式中，每个信息元素前面带有一个字母。控制器将这个字母转到特定寄存器。
Word Address Format is mostly used. In this format, each element of information is prefixed by a letter. And the controller conveys the letter to a particular register.
可能通过在某个寄存器中计算目标地址、并且使用间接跳转指令把控制传给该寄存器中的地址，把跳转指令本身的目标隐藏起来。
The target of the jump instruction itself may be hidden by computing its address in a register and using an indirect jump instruction to transfer control to the address in that register.
使用物理地址扩展位(PAE)，位于控制寄存器CR4的第五位。
Using the physical address extension (PAE) flag, located in bit 5 of control register CR4.
从设备的观点看，例如软盘控制器，它只能看见其控制寄存器所在的(ISA)空间的地址，不能看到系统主存。
From the point of view of the device, say the floppy disk controller, it will see only the address space that its control registers are in (ISA), and not the system memory.
从设备的观点看，例如软盘控制器，它只能看见其控制寄存器所在的(ISA)空间的地址，不能看到系统主存。
From the point of view of the device, say the floppy disk controller, it will see only the address space that its control registers are in (ISA), and not the system memory.
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