DOS的汇编语言程序， 模拟BIOS的硬盘光驱检测，并支持硬盘扇区读写以及保存特定扇区到文件。-hard/CD driver detect/identity Harddisk sector editor

汇编ASM实现物理硬盘的读写操作，代码附有详细注释，外加一份硬盘的文档！-Assembler ASM achieve physical hard disk read and write operations, the code with detailed notes, plus a hard disk documentation!