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A1SAi & A1SRi Series Motherboard User’s Manual
AB Segments In DRAM
When this feature is set to Enabled, Target A- or B- segments will be routed to DRAM
during memory read and write cycles. The options are
Disabled
and Enabled.
E Segment In DRAM
When this feature is set to Enabled, Target E segment will be routed to DRAM during
memory read and write cycles. The options are Disabled and
Enabled
.
F Segment In DRAM
When this feature is set to Enabled, Target F segment will be routed to DRAM during
memory read and write cycles. The options are Disabled and
Enabled
.
ZQ Calibration
When this feature is set to Enabled, commands to calibrate DRAM output drivers
will be issued so that ZQ Calibration will be performed during a system boot or
system reset. The options are Disabled and
Enabled
.
Propogate Errors to Cores (BMCMODE)
Use this feature to configure the Bunit Machine Check Mode to propogate errors.
The options are Enable and
Disable.
CMD Rate (Command Rate)
Use this feature to set the CMD rate, which is the number of clock cycles needed
for the memory to send data. The options are
Auto
, 1N, 2N,
and 3N.
Out of Order Memory Processing
Select Enabled to support Out of Order Memory Processing, which is a process used
by a computer to retrieve instructions from its memory to improve CPU performance.
The options are Disabled and
Enabled
.
Out of Order Aging Threshold
In a multi-core architecture, the DRAM system in a computer processes multiple
threads or streams of requests from the In_Order (FIFO: First_In_First_Out) queue
and the Out_of_Order queue in the interleaved/interconnect mode. This feature
allows the user to specify the maximum number of requests to be processed for
the same order before the system moves on and process the next thread of re-
quests in the "Out_Of_Order" queue while in the "Out_of_Order" cycle. Once the
"Out_of_Order" cycle expires, the system will move to the "In_Order" cycle and
starts to process the requests in the "In-Order" queue. The default setting is
31
.
New Request Bypass
Select Enabled for the system to skip the process currently in progress and process
a new request immediately. The options are Disabled and
Enabled
.
