AbstractMachine is a minimal, modularized, and machine-independent 
abstraction layer of the computer hardware:

* physical memory and direct execution (The "Turing Machine");
* basic model for input and output devices (I/O Extension);
* interrupt/exception and processor context management (Context Extension);
* virtual memory and protection (Virtual Memory Extension);
* multiprocessing (Multiprocessing Extension).

CONTACTS

Bug reports and suggestions go to Yanyan Jiang (jyy@nju.edu.cn) and Zihao 
Yu (yuzihao@ict.ac.cn).
