仿真通常在VM和底层硬件和操作系统之间提供层以便创建如图1中所示的预期的平台环境的幻想。

Emulation commonly provides a layer between the VM and the underlying hardware and operating system to create the illusion of the desired platform environment as shown in Figure 1.

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在来宾操作系统的驱动程序窥探内存和硬件寄存器时，软件存在于下面来仿真设备（参见图 2）。

When the guest operating system's driver peeks and pokes at the memory and hardware registers, software exists underneath to emulate the device (see Figure 2).

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可用于来宾操作系统的虚拟化，或作为完整的机器仿真器使用，运行使用主机CPU或其他CPU架构的操作系统。

You can use it for guest operating system virtualization or as a full machine emulator running operating systems targeted to the host CPU or other CPU architectures.

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