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在计算机的各种ROM存储器中(如主板上的ROM BIOS、显示适配器上的ROM BIOS以及硬盘ROM BIOS等)都保存着非常重要的各种BIOS程序,这些BIOS程序通常都运行在它们各自的ROM存储器中。由于ROM存储器的速度一般要比RAM存储器低数倍,所以如果能使这些BIOS程序在RAM存储器中运行,将会大大提高系统的速度。设置“影子内存”的作用正是如此。
Various computer ROM programs (ROM BIOS on the motherboard, ROM BIOS on the display adapter, and ROM ROM BIOS, etc.) have all kinds of BIOS programs that are very important. These BIOS programs usually run on their own ROM In memory. Because ROM memory is typically several times slower than RAM memory, these BIOS programs can greatly increase system speed if they are run in RAM memory. Set the “shadow memory” is exactly the role.