1. The power button activates the power supply in the PC, sending power to the motherboard and other components.
  2. The PC performs a power-on self-test (POST). The POST is a small computer program within the BIOS that checks for hardware failures. A single beep after the POST signals that everything's okay. Other beep sequences signal a hardware failure, and PC repair specialists compare these sequences with a chart to determine which component has failed.
  3. The PC displays information on the attached monitor showing details about the boot process. These include the BIOS manufacturer and revision, processor specs, the amount of RAM installed, and the drives detected. Many PCs have replaced displaying this information with a splash screen showing the manufacturer's logo. You can turn off the splash screen in the BIOS settings if you'd rather see the text.
  4. The BIOS attempts to access the first sector of the drive designated as the boot disk. The first sector is the first kilobytes of the disk in sequence, if the drive is read sequentially starting with the first available storage address. The boot disk is typically the same hard disk or solid-state drive that contains your operating system. You can change the boot disk by configuring the BIOS or interrupting the boot process with a key sequence (often indicated on the boot screens).
  5. The BIOS confirms there's a bootstrap loader, or boot loader, in that first sector of the boot disk, and it loads that boot loader into memory (RAM). The boot loader is a small program designed to find and launch the PC's operating system.
  6. Once the boot loader is in memory, the BIOS hands over its work to the boot loader, which in turn begins loading the operating system into memory.
  7. When the boot loader finishes its task, it turns control of the PC over to the operating system. Then, the OS is ready for user interaction.

how computer boot up?的更多相关文章

  1. A Guide to the Multiboot Process

    A Guide to the Multiboot Process The XP and Vista boot process in general.The Windows dual and multi ...

  2. 10.5.2 Boot Block 启动块 - 操作系统教程

    简单一篇文章明白地讲解了计算机操作系统的启动过程 OPERATING SYSTEM CONCEPTS ABRAHAM SILBERSCHATZ PETER BAER GALVIN GREG GAGNE ...

  3. computer repair services in Hangzhou

    We provide support for all kinds of Windows based Desktops and Laptops all over Hangzhou,I will be i ...

  4. 【分布式存储】GlusterFS failing to mount at boot with Ubuntu 14.04

    GlusterFS failing to mount at boot with Ubuntu 14.04   Previously I asked about mounting GlusterFS a ...

  5. What Your Computer Does While You Wait

    转: CPU的等待有多久? 原文标题:What Your Computer Does While You Wait 原文地址:http://duartes.org/gustavo/blog/ [注:本 ...

  6. 【Spring】关于Boot应用中集成Spring Security你必须了解的那些事

    Spring Security Spring Security是Spring社区的一个顶级项目,也是Spring Boot官方推荐使用的Security框架.除了常规的Authentication和A ...

  7. Android Partitions Explained: boot, system, recovery, data, cache & misc

    from: http://www.addictivetips.com/mobile/android-partitions-explained-boot-system-recovery-data-cac ...

  8. 0xc000000f: Error attempting to read the boot configuration data

    Get the fix to “0xc000000f: error attempting to read the boot configuration data” boot error for Win ...

  9. In Depth : Android Boot Sequence / Process

    In Depth : Android Boot Sequence / Process What happened when I press power on button in my Android ...

随机推荐

  1. FireFox的配置文件的引用

    1.firefox的配置文件的实际路径:C:\Users\Administrator\AppData\Roaming\Mozilla\Firefox\Profiles\oviavula.default ...

  2. Delphi @ # $ 特殊字符含义

      ^: 指针   @: 取址  #: 十进制符   $: 十六进制符

  3. Activity的生命周期和启动模式

    Activity的生命周期分析 典型情况下的生命周期.是指在用户参与的情况下,Activity所经过的生命周期的改变. 异常情况下的生命周期.是指Activity被系统回收或者由于当前设备的Confi ...

  4. python网络编程 — HTTP客户端

    A simple http client. It gets the contents of special webserver page and print it.(Default path is & ...

  5. Struts2-3.struts.xml的action可以简写

    如果只是跳转到某个页面的话,可以这样写 <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE s ...

  6. String类之substring--->查找某位置对应的字

    以下方法都是java内置类String类的内置方法(不是构造方法哦,就是普通的方法),不需要我们写,直接拿过来用即可. substring方法对应Api介绍   查找字符串中的 从int beginI ...

  7. magento数据添加

    1.第一种方法是一个字段一个字段地添加! $record = Mage::getModel('warehouse/record');      $record->addData($postDat ...

  8. jQuery第六章

    jQuery与Ajax应用 一.Ajax的优势和不足 1.Ajax的优势: (1)不需要插件支持:不需要任何浏览器插件就可以被绝大多数浏览器支持 (2)优秀的用户体验:能在不刷新整个页面的前提下更新数 ...

  9. mysql解决中文乱码问题

    安装文件 my.ini default-character-set=gbk 安装文件 db.opt default-character-set=gbkdefault-collation=gbk_chi ...

  10. hdu_5585_Less Time, More profit(二分+最大权闭合图)

    题目链接:hdu_5585_Less Time, More profit 题意: 有n个工厂,每建一个工厂要花费vi,需要时间ti,然后有m个商店,每个商店需要在指定的k个工厂中进货,才能盈利,如果其 ...