这是外国人写的一个小型的实时操作系统，对于想了解操作系统的初学者很有帮助。,This is written by a foreigner, a small real-time operating system for beginners would be helpful to understand the operating system.

一个外国人用汇编开发的操作系统，值得借鉴-Development of a foreigner with a compilation of the operating system, it is worth drawing

外国人编写的HART源码 在DOS下实现 -hart dos