bit protected mode的意思|示意

In the days before Windows, this is a very important function, but the 32-bit "protected mode" software does not use BIOS, therefore the use of this feature and even less.

在Windows以前，这是一个非常重要的功能，但是32位的“保护模式”软件不使用BIOS，因此今天这个功能的用途就更少了。

NTLDR loads the basic memory configuration and switches to 32-bit mode (protected mode). NTLDR then places itself into high memory to free up as much memory space as possible.

NTLDR载入基本的内存配置并转为32位模式(保护模式)。然后NTLDR将自己放入高内存以尽可能多地释放内存。

The problem is that this works when the CPU is in 32-bit VPAM (Virtual Protected Address Mode), which is what an i386 OS USES, but not when the CPU is in the so-called "Long Mode" that AMD introduced.

问题是这个工程时，CPU在32位vpam(虚拟保护地址方式)，这是一种什么i386操作系统使用，但不是当CPU是所谓的“长”模式，AMD推出。

For a code to be able to run with access to 64-bit registers, another kind of protected mode is employed, called long mode.

一个代码能够访问64位寄存器，采用另一种保护模式，称为长模式。

With these data structures, code modules, and system registers initialized, the processor can be switched to protected mode by loading control register CR0 with a value that sets the PE flag (bit 0).

当设置好这些数据结构，代码段以及系统寄存器之后，可以通过设置控制寄存器CR0的PE位(第0位)为1来进入保护模式。