Hardware Reference
In-Depth Information
the OS USB drivers take over. However, I recommend that you leave legacy support en-
abled so the USB keyboard and mouse function while running self-booting or DOS-based
diagnostics or when running other non-USB-aware OSs.
USBlegacysupportisforkeyboardsandmiceonly;itdoesn'tworkforUSBhubsorother
USB devices. For devices other than keyboards or mice to work, you need a USB-aware
OS with the appropriate USB drivers.
Advanced Fan Control Configuration Menu
Mostsystemshaveoneormorechassisfanstohelpcoolthesystem. Table5.18 showsthe
function of the Fan Control Configuration menu on a typical high-performance PC.
Table 5.18 Advanced Fan Control Configuration Menu
Many newer boards have built-in monitor chips that can read temperature, voltage, and
fanspeeds.ThosethatdooftenincludeascreenintheBIOSSetupthatallowsyoutoview
the readings from the monitor chip. Usually such boards also include a hardware monitor
program that runs under Windows for more convenient monitoring while the system is in
use (see Table 5.19 ).
Table 5.19 Advanced Hardware Monitoring Display
 
 
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