XBUF

An area of user memory reserved for extended buffers, which can range in size from 32 words to the maximum size of the extended buffer pool. The extended buffer pool is used for data caching, directory caching and other system functions.; 一段供擴充緩沖器用的用戶存儲區。該區的范圍可從32個字起直到擴充緩沖池最大容 量。這類緩沖池一般用作數據高速緩沖、目錄高速緩沖或完成其它的系統功能。eXtend BUFfer pool的縮寫。