高端内存区

高端内存区（英语：high memory area，简称HMA）是DOS记忆体管理（英语：DOS memory management）中的词语，是指IBM PC（或相容电脑）中，定址空间在1 MB以上的前65520字节组成的内存区域。^[1]

高端内存区是在1 MB以上的前65520字节组成的内存区域

参考资料

1. Paul, Matthias R. Treiber dynamisch nachladen (Intra-Segment-Offset-Relokation zum Laden von TSRs in die HMA) [Loading drivers dynamically (Intra-segment offset relocation to load TSRs into the HMA)]. Newsgroup: de.comp.os.msdos. 2002-02-02 [2017-07-02]. （原始内容存档于2017-09-09） （德语）. (NB. Gives a comprehensive overview on the history and "nature" of the HMA and the non-obvious design constraints to be observed when developing resident system extensions to be loaded into the HMA. It also describes how to address these issues using stubs, backdoors, and intra-segment offset relocation, a method used by DR-DOS drivers capable of relocating into the HMA and similar to a (more sophisticated) method used as the basis for the dynamic dead code elimination in the author's FreeKEYB driver.)