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Using the Setup Program
59
Extended Configuration Submenu
To access this submenu, select Maintenance on the menu bar, then Extended Configuration.
Maintenance
Main
Advanced Security
Power
Boot
Exit
Extended Configuration
The submenu represented by Table 11 is for setting video memory cache mode. This submenu
becomes available when User Defined is selected under Extended Configuration.
Table 11. Extended Configuration Submenu
Feature Options
Description
Extended Configuration
•
Default (default)
•
User-Defined
User Defined
allows setting memory control and video
memory cache mode. If selected here, will also display
in the Advanced Menu as: “Extended Menu:
Used
.”
Video Memory Cache Mode
•
USWC
•
UC (default)
Selects Uncacheable Speculative Write-Combining
(USWC) video memory cache mode. Full 32 byte
contents of the Write Combining buffer are written to
memory as required. Cache lookups are not
performed. Both the video driver and the application
must support Write Combining.
Selects UnCacheable (UC) video memory cache mode.
This setting identifies the video memory range as
uncacheable by the processor. Memory writes are
performed in program order. Cache lookups are not
performed. Well suited for applications not supporting
Write Combining.
SDRAM Auto-Configuration
•
Auto (default)
•
User Defined
Sets extended memory configuration options to
Auto
or
User Defined
.
CAS# Latency
•
3
•
2
•
Auto (default)
Selects the number of clock cycles required to address
a column in memory.
SDRAM RAS# to CAS#
Delay
•
3
•
2
•
Auto (default)
Selects the number of clock cycles between addressing
a row and addressing a column.
SDRAM RAS# Precharge
•
3
•
2
•
Auto (default)
Selects the length of time required before accessing a
new row.
Summary of Contents for D815EEA2
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