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打开电源启动机器几乎是电脑爱好者每天必做的事情,面对屏幕上出现的一幅幅启动画面,我们一点儿也不会感到陌生,但是,计算机在显示这些启动画面时都做了些什么工作呢?相信有的朋友还不是很清楚。本文就来介绍一下从打开电源到出现 Windows 的蓝天白云时,计算机到底都干了些什么事情。首先让我们来了解一些基本概念。第一个是大家非常熟悉的 BIOS(基本输入输出系统),BIOS 是直接与硬件打交道的底层代码,它为操作系统提供了控制硬件设备的基本功能。BIOS 包括有系统 BIOS(即常说的主板 BIOS)、显卡 BIOS 和其他设备(例如 IDE 控制器、SCSI 卡或网卡等)的 BIOS,其中系统 BIOS 是本文要讨论的主角,因为计算机的启动过程正是在它的控制下进行的。BIOS 一般被存放在 ROM(只读存储芯片)之中,即使在关机或掉电以后,这些代码也不会消失。
Turning on the power To start the machine is almost a daily necessity for computer enthusiasts, and it is not strange at first glance to the splash screens that appear on the screen, but what does the computer do when displaying these splash screens? Work? I believe some friends are not very clear. This article came to introduce the power from the turn on the Windows blue sky and white clouds, the computer in the end have done something. Let us first understand some basic concepts. The first is a familiar BIOS (basic input / output system). The BIOS is the underlying code that deals directly with the hardware and provides the operating system with the basic capabilities to control hardware devices. The BIOS includes the BIOS for the system BIOS, the graphics BIOS, and other devices such as IDE controllers, SCSI cards, or network cards, where the system BIOS is the protagonist of this article because the computer’s startup process is Under its control. The BIOS is generally stored in ROM (Read Only Memory), the code will not disappear even after the shutdown or power-down.