基于AT91RM9200的BootLoader设计与实现 ，依赖于CPU体系结构的代码，比如设备初始化、开关中断、初始化时钟等，通常都放在stage 1中，而且都用汇编来实现，以达到短小精悍的目的。而stage 2通常用C语言来实现，这样可以实现较复杂的功能，而且代码有较好的可读性和可移植性。-AT91RM9200-based design and implementation of the BootLoader, depends on the CPU architecture of the code, such as device initialization, interrupt switch, initialization clock and so on, are usually placed in stage 1, and are compiled to achieve in order to achieve dapper目的. Stage 2 is usually the C language implementation, this can achieve more complex functions, but there is a better code readability and portability.