我自己写的一个实模式的操作系统，支持fat12文件系统和一个和shell整合到一起的简单的键盘驱动，目前正在实现pci总线驱动程序。以后将会转入到保护模式下开发-I wrote it myself a real mode of the operating system, support FAT12 file system and a shell and the integration with a simple keyboard-driven, are currently achieving p