Bull Cedoc Novascale R422, Installation And User Manual, Page: 68 / 134

7-8
NovaScale R422 Installation and User's Guide
Cache Base 512K-640K
If enabled, this feature will allow the data stored in the memory area: 512K-640K to be
cached (written) into a buffer, a storage area in the Static DROM (SDROM) or written into
L1, L2 or L3 cache inside the CPU to speed up CPU operations. Select Uncached to disable
this function. Select Write Through to allow data to be cached into the buffer and written
into the system memory at the same time. Select Write Protect to prevent data from being
written into the base memory area of Block 512-640K. Select Write Back to allow the CPU
to write data back directly from the buffer without writing data to the system memory to
speed up CPU's operation. The options are Uncached, Write Through, Write Protect, and
Write Back.
Cache Extended Memory
If enabled, this feature will allow the data stored in the extended memory area to be
cached (written) into a buffer, a storage area in the Static DROM (SDROM) or written
into L1, L2 or L3 cache inside the CPU to speed up CPU's operations. Select Uncached to
disable this function. Select Write Through to allow data to be cached into the buffer and
written into the system memory at the same time. Select Write Protect to prevent data from
being written into the base memory area of Block 0-512K. Select Write Back to allow the
CPU to write data back directly from the buffer without writing data to the system memory
to speed up CPU's operation. The options are Uncached, Write Through, Write Protect and
Write Bac k.
Discrete MTRR Allocation
If enabled, MTRRs (Memory Type Range Registers) are con fi gured as distinct, separate units
and cannot be overlapped. If enabled, the user can achieve better graphic effects when
using a Linux graphic driver that requires the write-combining con fi guration with 4GB or
more memory. The options are Enabled and Disabled.
PCI Con fi guration
Access the submenu to make changes to the following settings for PCI devices.
Onboard GLAN1/Onboard GLAN2 (Gigabit- LAN) OPROM Con fi gure
Enabling this option provides the capability to boot from GLAN Port 1 or GLAN Port 2. The
options are Disabled and Enabled.
Default Primary Video Adapter
This feature allows the user to specify which video adapter is to be used as the default
primary video adapter: the onboard video adapter or others. The options are Other and
Onboard Video .
Emulated IRQ Solutions
The options are Disabled and Enabled.
PCI-Exp. I/O Performance
Some add-on cards perform faster with the coalesce feature, which limits the payload size
to 128 Bytes, while others perform faster with a payload size of 256 bytes, which inhibits
coalesce features. Please refer to your add-on card user guide for the desired setting . The
options are Payload (256 Bytes) and Coalesce Enabled (128 Bytes ).