
平台论坛博客文库

› 论坛 › 程序设计 › 内核源码 › 引导扇区加载位置“0x7c00” ？

[内核入门] 引导扇区加载位置“0x7c00” ？ [复制链接]

_nosay

大富大贵

论坛徽章:: 13

电梯直达

1楼 [收藏(0)] [报告]

发表于 2016-03-29 14:53 |只看该作者 |倒序浏览

BIOS developer team decided 0x7C00 because:

1.They wanted to leave as much room as possible for the OS to load itself within the 32KiB.
2.8086/8088 used 0x0 - 0x3FF for interrupts vector, and BIOS data area was after it.
3.The boot sector was 512 bytes, and stack/data area for boot program needed more 512 bytes.
4.So, 0x7C00, the last 1024B of 32KiB was chosen.

来源：
http://www.glamenv-septzen.net/en/view/6

文库|博客

返回列表

Chinaunix › 论坛 › 程序设计 › 内核源码 › 引导扇区加载位置“0x7c00” ？