E820 Address Map描述(用C与Assembly混编) OS必须知道系统物理内存的数量，才能够有效的使用和管理这些物理内存。所以在booting阶段，我们必须通过某种手段来检测和获取物理内存的总量。因此我们利用BIOS中断获取内存容量，常用的是INT 15h, AX=E820h - Query System Address Map的中断方法 ,E820 Address Map describe (using C and Assembly mixed) OS system must

这是关于硬盘底层结构的详细介绍图！非常直观！外加详细的分析和说明-This is the underlying structure on the hard disk details map! Very intuitive! Plus detailed analysis and descr iption.

用位示图管理磁盘空间的分配与回收 要求打印或显示程序运行前和运行后的位示图，以及分配和回收磁盘的物理地址过程。-Management with the bit map display of disk space allocation and recycling requirements of the print or display program to run before and after running the bit map display, and distribution an

ArcGIS里的ARCMap中加入底层地图的功能，已经实现-ArcMap in ARCMap to add shading map function, has been achieved