Dell Laptop Sets the cache and mapping of BIOS memory

Ask:

DELL 640m How to map the BIOS to memory or video card?

I saw it on the Master of optimization. BIOS can be mapped, I see the introduction of the Internet, usually the BIOS mapped to memory or video card.

For:

The role of the BIOS mapping is to map the system's BIOS to system memory so that when the system needs to read the BIOS information, it can be read directly from memory without requiring access to the motherboard's BIOS chip. Because the memory reads much faster than the BIOS chip, using the BIOS mapping feature can improve the performance of the computer to some extent.
If your BIOS is award, you can press the DEL key to enter the BIOS at boot, open the "Advanced BIOS Features" option, and look for the BIOS shadowed option in it, as long as you change its value from "Disabled" to " Enabled, you can enable the BIOS shadowed feature. If this option is not available, the motherboard vendor does not provide this feature. In addition, the BIOS mapping improves the performance of the system, but because the system rarely reads BIOS information at run time, the performance of the BIOS mapping is minimal.