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.
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