Lua VM 资料
There's a good writeup on Lua's register-based VM here and the creators also have an excellent writeup of how Lua 5.0 was implmented (Lua switched from a stack-based VM to register-based with 5.0).
The Implementation of Lua 5.0 [PDF]
Interesting things about the Lua interpreter
Lua Reference Manual 尤其是第 4 章 The Application Program Interface 中文翻译版：Lua 5.3 参考手册