BIOS Setup Information
ROBO-638 User’s Manual
4-8
Video BIOS Shadow
Select “Cached” option to get more higher display performance by shadowing
and caching VGA BIOS. If user chooses “Enabled” option, only BIOS shadow
function is active. The “Disabled” option will ignore this BIOS caching and
shadowing function.
Shadow Memory (from address C000 – DFFF, 16K per segment)
Each of segments provides three options “Disabled”, “Enabled”, and “Cached”
for faster adapter’s ROM execution. However this shadow function is Chipset
oriented and dependent on system hardware feature. In general, C000 and C400
will be allocated for VGA BIOS and set to
Cached
to get higher display
performance by shadowing and caching feature. If user chooses
Enabled
setting,
only BIOS shadow function is active.
4.6 Advanced Chipset Setup Menu
This setup is very important to keep system stability. If you are not technical
person, do not attempt to change any parameters. The best way is to choose
optimal default setting.
Configure SDRAM Timing by SPD
This option provides DIMM plug-and-play support by Serial Presence Detect
(SPD) mechanism via the System Management Bus (SMBus) interface. You can
disable this option to manage the following four SDRAM timing options by
yourself. In addition, SDRAM operating timings may follow serial presence from
EEPROM content by setting this option to “Enabled”, and all of SDRAM timing
options will be not available and hidden.
SDRAM RAS# to CAS# delay
This option controls the number of SCLKs (SDRAM Clock) from a row activate
command to a read or write command. If your system installs good quality of
SDRAM, you can set this option to “2 SCLKs” to obtain better memory
performance. Normally, the option will be set to
3 SCLKs
.
SDRAM RAS# Precharge
