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Option
Description
When Internal SD Card Redundancy is set to Disabled, only the primary SD card is visible to the OS. This option is
set to Disabled by default.
Internal SD
By default, the primary SD card is selected to be SD Card 1. If SD Card 1 is not present, then the controller selects
Primary Card
SD Card 2 to be the primary SD card.
OS Watchdog
If your system stops responding, this watchdog timer aids in the recovery of your operating system. When this
Timer
option is set to Enabled, the operating system initializes the timer. When this option is set to Disabled (the
default), the timer does not have any effect on the system.
Empty Slot Unhide Enables or disables the root ports of all the empty slots that are accessible to the BIOS and OS. This option is set
to Disabled by default.
Memory Mapped
Enables or disables the support for the PCIe devices that need large amounts of memory. Enable this option only
I/O above 4 GB
for 64-bit operating systems. This option is set to Enabled by default.
Memory Mapped
When set to 12 TB, the system maps the MMIO base to 12 TB. Enable this option for an OS that requires 44 bit
I/O Base
PCIe addressing. When set to 512 GB, the system maps the MMIO base to 512 GB, and reduces the maximum
support for memory to less than 512 GB. Enable this option only for the 4 GPU DGMA issue. This option is set to
56 TB by default.
Mezzanine Slot
The Slot Disablement feature controls the configuration of mezzanine cards installed in the specified slots. Only
Disablement
mezzanine card slots that are present on your system are available for control.
Serial Communication
You can use the Serial Communication screen to view the properties of the serial communication port.
Viewing Serial Communication
To view the Serial Communication screen, perform the following steps:
Steps
1. Power on, or restart your system.
2. Press F2 immediately after you see the following message:
F2 = System Setup
NOTE:
If your operating system begins to load before you press F2, wait for the system to finish booting, and then
restart your system and try again.
3. On the System Setup Main Menu screen, click System BIOS.
4. On the System BIOS screen, click Serial Communication.
Serial Communication details
About this task
The Serial Communication screen details are explained as follows:
Option
Description
Serial
Enables you to select serial communication devices (Serial Device 1 and Serial Device 2) in BIOS. BIOS console
Communication
redirection can also be enabled, and the port address can be specified. This option is set to Auto by default.
Serial Port
Enables you to set the port address for serial device. This field sets the serial port address to either COM1 or
Address
COM2 (COM1=0x3F8, COM2=0x2F8). This option is set to Serial Device1=COM2 or Serial Device 2=COM1
by default.
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Pre-operating system management applications
NOTE:
You can use only Serial Device 2 for the Serial Over LAN (SOL) feature. To use console
redirection by SOL, configure the same port address for console redirection and the serial device.
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