http://www.oldlinux.org/Book-Lite/
http://www.oldlinux.org/download/clk011c-3.0.pdf
linux官方版本
http://draconux.free.fr/os_dev/linux0.01_download.html
https://blog.csdn.net/chengwenyang/article/details/77417830
https://blog.csdn.net/asdfdypro/article/details/44680813
https://www.jianshu.com/p/ab4fa7f12f06
http://www.aiuxian.com/article/p-1164108.html
http://tinylab.org/cs630-qemu-lab/
https://tinylab.gitbooks.io/shellbook/
https://www.cnblogs.com/tedyyan/archive/2012/01/30/2428063.html
Bochs IA-32 Emulator Project
https://blog.csdn.net/chengwenyang/article/details/23547133