Premio Computer Apollo/Shadowhawk - Manual (Page 122)

BIOS Setup Program
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4.2.1 Extended Configuration Submenu
To access this submenu, select Maintenance on the menu bar and then Extended Configuration.
Maintenance Main Advanced Security Power Boot Exit
Extended Configuration
The submenu represented by Table 61 is for setting video memory cache mode. This submenu
becomes available when User Defined is selected under Extended Configuration.
Table 61. 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.
SDRAM RAS# Active to
Precharge • 7
• 6
• 5
• Auto
(default)
Corresponds to tRAS.