MSI K8NNeo4 Platinum Series User Manual page 56

BIOS Setup
Read Preamble value
W hen the User Config mode is set to [Manual], the field is adjustable. The time
prior to the max-read DQS-return when the DQS receiver should be turned on.
This is specified in units of 0.5ns. The controller needs to know when to enbale
its DQS receiver in anticipation of the DRAM DQS driver truning on for a read.
The controller will disable its DQS receiver until the read preamble time and then
enable its DQS receiver while the DRAM asserts DQS. Setting options: [2ns], [2.
5ns], [3ns], [3.5ns], [4ns], [4.5ns], [5ns], [5.5ns], [6ns], [6.5ns], [7ns], [7.5ns],
[8ns], [8.5ns], [9ns], [9.5ns].
Async Latency value
When the User Config mode is set to [Manual], the field is adjustable. This field
should be loaded with 4-bit value equal to th e maximum asynchronous latency
in the DRAM read round-trip loop. Setting options: [2ns], [3ns], [4ns], [5ns],
[6ns], [7ns], [8ns], [9ns], [10ns], [11ns].
S/W memory hole Remapping
This field enables software to remap the physical memory to the address higher
than 00E0. (This item only activities in 64-bit OS) Setting options: [Disabled],
[Enabled].
H/W memory hole Remapping
This field enables hardware to remap the physical memory to the address
higher than 00E0. (This item only activities in 64-bit OS) Setting options: [Disabled],
[Enabled].
MTRR M apping Mode
This field allows you to control the MTRR mapping Mode. Setting options:
[Discrete], [Continuous].
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