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base address 基址：

the part of a two-part memory address that remains constant and provides a reference point from which the location of a byte of data can be calculated. a base address is accompanied by an offset value that is added to the base to determine the exact location(the absolute address)of the information. the concept is similar to a street address system . for example, "2010 main street " plus an offset(10from the beginning of the block ).base address are known as segment address in IBM pcs and compatibles; data in these computers is identified by its position as a relative offset the start of the segment.

保持恒定的两部分内存地址的一部分并提供一个基准点，从这里可以计算一个字节数据的位置。基址伴随着一个加到基上的偏移值来确定信息准确的位置(绝对地址)。这一概念与街道地址系统雷同。例如：“大街2010号”由基(大街2000街段)加上偏移值(从街段开始的10号)。在IBMPC和兼容机中的数据按其相对于由段开始的相对偏移位置被识别。