In a computer, an immediate or realtime address. Typically, the virtual address of a word in memory consists of two parts. The first part refers to a page number(a fixed-size block of main memory). The second refers to a location within the block.

• 计算机中的直接地址或实时地址。通常，存储器中一个字的虚拟地址由两部分组成，第一部分是页面号（主存中固定大小的一块），第二部分是该块内的一个地址。