Supero Super P6DNF, User Manual

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2-7
Chapter 2: Running Setup
DRAM Refresh Type
This option sets the type of system memory refresh that is used in
the computer. The settings are RAS Only or CAS/RAS. The Opti-
mal and Fail-Safe default settings are RAS Only.
DRAM Refresh Queue
Due to capacitor discharge, DRAM will lose information from the bit
cell. Therefore, all DRAMs are refreshed every fifteen microsecond.
When this option is Enabled, all refresh requests are queued. If
Disabled, all refreshes are priority requests. The settings are: Dis-
abled or Enabled. The Optimal and Fail-Safe default settings are
Enabled.
VGA Frame Buffer USWC
USWC is a memory cycle type that stands for Uncacheable Specu-
lative Write Combining. The settings are: Disabled or Enabled.
The Optimal and Fail-Safe default settings are Disabled.
PCI Frame Buffer USWC
When Enabled, the PCI frame buffer address and length are divided
into 2. The value is then programmed into the Pentium Pro Variable
MTRR (3) with the value for USWC (01h). The settings are: Dis-
abled or Enabled. The Optimal and Fail-Safe default settings are
Disabled.
Fixed Memory Hole
This option allows a memory hole to be specified for either the 512-
640K region or the 15-16M region. The settings for this option are
Disabled, 512-640KB or 15-16MB. The Optimal and Fail-Safe de-
fault settings are Disabled.