The BIOS then displays some details about your system .This typically inclydes information about:
BIOS同常会显示系统的一些详细信息。主要信息包括：
The processor
The floppy driver and hard driver
Memory
BIOS revision and date
Display
处理器
软盘驱动器和硬盘驱动器
内存
BIOS版本和日期
显示器
The BIOS will try to intiate the boot sequence from the first device
BlOS会从第一个启动设备开始这个启动过程
You are probably very familiar with two different types of software : the operating system and the applications
你可能对两种类型的软件很熟悉：操作系统和应用软件
Inside the above-mentioned ROM three different programs are stored (actually burned).The Basic Input and Output System (BIOS) that is responsible for teaching the main processor how to deal with basic devices, such as floppy unit or hard disk and so on; the Power on Self Test (POST)which is the program in charge of the self test thatis executed every time PC is powered up (likememory counting, for instance); and the Setup which is the program that allows the alteration ofthe parameters stored in the configuration memory(CMOS).
在上述只读存储器中存储着三种不同类型的程序(事实上是烧录上去的)。基本的输人输出系统(BIOS程序)负责指导主处理器如何控制像软盘驱动器、硬盘之类的基本设备。加电自检程序( POST )是负责在每次计算机开机时执行自检测的程序(比如内存容量检测)。设置程序(Setup)则是种专门用来修改CMOS中存储参数的程序。
The BIOS software has a number of different roles, but its most important role is to load the operating system
BIOS软件要执行许多不同的任务，但最重要的任务是载入操作系统。
When you tum on your compute, the BIOS performs the following tasks. This is its usual sequence:
当你启动计算机时，BIOS就执行如下几项任务，并通常按下列顺序执行
1. Check the CMOS Setup for custom settings
1. 检测CMOS常规设置
2. Load the interupt handlers and device drivers
2. 载入中断处理程序和设备驱动程序
3. Initialize registers and power management
3. 初始化寄存器和电源管理
4. Perform the Power on Self Test (POST)
4. 执行加电自检程序（POST）
5. Display system settings
5. 显示系统设置
6. Determine which devies are bootable
6. 确定和启动设备
7. Initiate the bootstap sequence
7 .开始自举程序