Turbo C 中使用 EMS 的探讨

Discuss on using EMS in Turbo C

采用在ＴｕｒｂｏＣ中使用ＥＭＳ的一般方法时，对ＥＭＳ的操作较麻烦，且易出错．本文提出用一结构体来记录ＥＭＳ页的属性，在此基础上编制ＥＭＳ的分配、释放、映射等函数，分别与ＴｕｒｂｏＣ中的ｆａｒｍａｌｏｃ（）、ｆａｒｆｒｅｅ（）和ＭＫＦＰ（）函数类似，操作安全、方便，且能保证完全释放ＥＭＳ．

When EMS is used in Turbo C,operation is both complicate and making errors easily.A structure recording EMS page property is presented in this paper.Based on the structure,EMS allocate,release,map and so on functions are programmed .The functions are similar to Turbo C “farmalloc()”、“farfree()”and“MKFP()”ones,operation is convernient and safe,and can ensure free EMS entirely.