This paper aims at the characteristic that the IRQ interrupt vector addresses of ARM7 microcontroller are assigned on the interrupt vector registers dynamic,introduces the idea that roots the interrupt vectors into ROM,establishes the IRQ interrupt recovery system.

In this article,the hardware cascade structrue,port address,the system defination of interrupt vector and the system initiation of middle,and supper microcomputer s maskable interrupt system are analyzed,and it gives out the points for attention in application and takes Fangzheng MMX 166 to a concrete example.

Based on tracking and debugging the process of the interrupt in VxWorks operation system,the establishment and structure of the exception and interrupt table as well as the driver of the VxWorks interrupt based on AT91RM9200 Processor are obtained by the experiment.

The meaning and the software realization of the interrupt vector table relocation is introduced.

TMS320C6000s,being high-performance digital signal processing chip series developed by TI company is taken as an example in this paper to introduce in detail the Flash boot mode and the new approach of the second-level bootload process with interrupt vector table which breaks through the structure obstacle of program bootload,and shows a new way to develp th.