Chapter 4: BIOS
4-11
Processor & Clock Options
This submenu lists CPU information and the following settings:
MTRR Mapping
This determines the method used for programming CPU MTRRs when 4 GB or more
memory is present. The options are
Continuous
, which makes the PCI hole non-
cacheable, and Discrete, which places the PCI hole below the 4 GB boundary.
Thermal Throttling
Used to Enable or
Disable
thermal to generate a power management event.
Power Now
This setting is used to Enable or
Disable
the AMD Power Now feature.
I/O Device Confi guration
Serial Port1 Address
This option specifi es the base I/O port address and Interrupt Request address of
serial port 1. Select
"Disabled" to prevent the serial port from accessing any system
resources. When this option is set to
Disabled
, the serial port physically becomes
unavailable. Select "3F8/IRQ4" to allow the serial port to use 3F8 as its I/O port
address and IRQ 4 for the interrupt address. The options are Disabled,
3F8/IRQ4
,
3E8/IRQ4 and 2E8/IRQ3.
MAC0 LAN0 Bridge
Settings are
Enabled
and Disabled for MAC0 LAN0 bridge.
MAC1 LAN1
Settings are
Auto
and Disabled for MAC1 LAN1.
MAC1 LAN1 Bridge
Settings are
Enabled
and Disabled for MAC1 LAN1 bridge.
Legacy USB Support
Select "Enabled" to enable the support for USB Legacy. Disable Legacy support
if there are no USB devices installed in the system. "Auto" disabled Legacy
support if no USB devices are connected. The options are Disabled,
Enabled
and Auto.
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