这篇文章是cnki官方数据库中的付费文章，内容大概是如何利用51芯片的外接ram来实现小型的文件系统（fs），提供一种设计思路。-This article is from the cnki database and it s not free.You know what it means.It describes how to apply the file system on the external ram chip of 80c51,another file system solution,