MSI K8N NEO4-F User Guide - Page 54
Read Preamble value, Async Latency value, S/W memory hole Remapping, H/W memory hole Remapping, MTRR - driver
UPC - 816909007725
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BIOS Setup Read Preamble value When 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 Mapping Mode This field allows you to control the MTRR mapping Mode. Setting options: [Discrete], [Continuous]. 3-13