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Chapter 4: BIOS
4-9
Discrete MTRR Allocation
If enabled, MTRRs (-Memory Type Range Registers) are confi gured as distinct, separate
units and cannot be overlapped. Set to Enabled to enhance graphic performance
when using a Linux graphic driver that requires write-combining confi guration with
4GB or more memory. The options are Enabled and Disabled.
PCI Confi guration
Access the submenu to make changes to the following settings for PCI devices.
Onboard GLAN1/Onboard GLAN2 (Gigabit- LAN) OPROM Confi gure
Enabling this option provides the capability to boot from the GLAN port specifi ed.
The options are Disabled and Enabled.
Reset Confi guration Data
If set to Yes, this setting clears the Extended System Confi guration Data- (ESCD)
area. The options are Yes and No.
Frequency for PCI-X
This option allows the user to change the bus frequency for the devices installed
in the slot indicated. The options are Auto, PCI 33 MHz, PCI 66 MHz, PCI-X 66
MHz, PCI-X 100 MHz and PCI-X 133 MHz.
Slot 1-Slot 5 PCI 32-bit/Slot 6 PCI-X 133 MHz/Slot 7 PCI-E x8
Access the submenu for each of the settings above to make changes to the
following:
Option ROM Scan
When enabled, this setting will initialize the device expansion ROM. The options
are Enabled and Disabled.
Enable Master
This setting allows you to enable the selected device as the PCI bus master.
The options are Enabled and Disabled.
Latency Timer
This setting allows you to set the clock rate for Bus Master. A high-priority, high-
throughout device may benefi t from a greater clock rate. The options are Default,
0020h, 0040h, 0060h, 0080h, 00A0h, 00C0h, and 00E0h. For Unix, Novell and
other Operating Systems, please select the option: other. If a drive fails after
the installation of a new software, you might want to change this setting and try
again. A different OS requires a different Bus Master clock rate.
Large Disk Access Mode
This setting determines how large hard drives are to be accessed. The options are
DOS or Other (for Unix, Novelle NetWare and other operating systems).