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AC450NX Rack Server System Product Guide
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Advanced Menu (continued)
Feature Option Description
Base RAM Step
1 MB
1 KB
Every location
Tests base memory once per MB or once per KB or
every location.
Extended RAM Step
1 MB
1 KB
Every location
Tests extended memory once per MB or once per KB or
every location.
L2 Cache Disabled
Enabled
Enabled causes the secondary cache to be sized and
enabled. Disabled causes the L2 cache to be disabled
for core clock frequency bus ratios equal to 2.
ISA Expansion
Aliasing
Disabled
Enabled
Enabled causes every I/O access with an address in the
range of x100h-x3FFh, x500h-x7FFh, x900h-xBFFh, and
xD00h-xFFFh to be internally aliased to the range 0100h-
03FFh before performing any other address range
checking.
Memory Scrubbing Disabled
Enabled
Enabled lets the BIOS automatically detect and correct
single-bit memory errors.
Restreaming Buffer Disabled
Enabled
When enabled, the data returned and buffered for a
delayed inbound read may be reaccessed following a
disconnect.
Read Prefetch for
PXB0A
16
32
64
Configures the number of “Dwords” that will be
prefetched on memory read multiple commands.
Read Prefetch for
PXB0B
16
32
64
Configures the number of “Dwords” that will be
prefetched on memory read multiple commands.
Read Prefetch for
PXB1A
16
32
64
Configures the number of “Dwords” that will be
prefetched on memory read multiple commands.
Multiboot Support
Disabled
Enabled
Only enable when the total number of bootable devices is
less than eight.
Special VGA Devnode
Disabled
Enabled
Enable this node only when nonPCI compliant VGA
cards need to be debugged. Enabling will impact I/O
resources for a large configuration.