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BIOS(Basic Input Output System)即基本输入/输出系统,它实际上是被固化到计算机主板上的ROM芯片中的一组程序,为计算机提供最低级的、最直接的硬件控制,又为高层软件提供基层调用,BIOS芯片是插在主板上的一个长方形芯片。其比较著名的生产厂家有:American Megatrends INC.的AMIBIOS和Award Software INC.的AWARDBIOS。 BIOS芯片主要用于存放:自诊断测试程序、系统自举装入程序、系统设置程序和主要I/O设备的I/O驱动程序及中断服务程序。同其它程序不同,BIOS程序是在每次开机或重启动时自动运行的,当微机接通电源后,系统将有一个对内部各个设备进行检查的过程,这是由一个通常称之为POST(Power On Self Test,上电自检)的程序来完成的。完整的POST白检将包括CPU、640K基本内存、1M以上的扩展内存、ROM、主板、CMOS存贮器、串并口、显示卡、
BIOS (Basic Input Output System) is a basic input / output system that is actually a set of programs that are solidified into a ROM chip on a computer motherboard to provide the lowest-level, most direct hardware control of a computer, Provide grassroots calls, BIOS chip is inserted in the motherboard of a rectangular chip. Its more famous manufacturers are AMIBIOS from American Megatrends INC. And AWARDBIOS from Award Software INC. The BIOS chip is mainly used to store self-diagnostic test program, system boot loader, system setup program and I / O driver and interrupt service routine of the main I / O devices. Unlike other programs, BIOS programs run automatically each time they are powered on or restarted. When the microcomputer is powered on, the system will have a process of checking each of the devices inside, which is normally called POST Power On Self Test, Power On Self Test) program to complete. The complete POST white check will include the CPU, 640K basic memory, 1M or more expansion memory, ROM, motherboard, CMOS memory, serial and parallel port, graphics card,