The paper places an emphasis in analysing the general mechanism while boot viruses infect a system, that is to say, the boot Viruses programs allocate boot sector of the system, and modify some of interrupt vectors.

This paper describes a method of timing measure by 0# channel of 8254 timer of PC system, including the change of interrupt vector, the computing of timer parameter, and the resuming of PC system.

The Realization of Vector Interruptionlon Single Chip Microcomputer and A Discussion on Its Response′Speed;

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.

A new vector representation method of product scheme is put forward.