Chipset Features Setup - Lanner electronics EM-561 Series User Manual

3.5 Advanced Chipset Features Setup
When you select the "CHIPSET FEATURES SETUP" on the main program, the screen display will
appears as:
Advanced Chipset Features Setup Screen
SDRAM CAS Latency Time
SDRAM Cycle Time Tras/Trc
SDRAM RAS-to –CAS Delay
SDRAM RAS Precharge Time
System BIOS Cacheable
Video BIOS Cacheable
Memory Hole At 15M-16M
CPU Latency Timer
Delayed Transaction
AGP Graphics Aperture Size
System Memory Frequency
Power-Supply Type
On-Chip Video window size
á â àß Move Enter: Select +/-/PU/PD: Value F10: Save Esc: Exit F1: General Help
F5: Previous Values F6: Fail-Safe Defaults F7: Optimized Defaults
This screen controls the settings for the board's chipset.
automatically configured. However, you can change it according to your operating environment.
SDRAM CAS Latency Time: When synchronous DRAM is installed, the number of clock cycles
of CAS latency depends on the DRAM timing. Do not reset this field from the default value
specified by the system designer.
SDRAM Cycle Time Tras/Trc : This item allows you to select the SDRAM cycle length. The
settings are 2 or 3.
SDRAM RAS-to-CAS Delay : This field lets you control the number of DCLKs between a Row
Activate command and a read or write command.
SDRAM RAS Precharge Time : The precharge time is the number of cycles it takes for the RAS
to accumulate its charge before DRAM refresh. If insufficient time is allowd, refresh may be
incomplete and the DRAM may fail to retain data. This field applies only if synchronous DRAM is
installed in the system.
System BIOS Cacheable : Selecting "Enabled" allows caching of the system BIOS ROM at
F0000h – FFFFFh, resulting in better system performance. However, if any program writes to
this memory area, a system error may result. The settings are "Enabled" and "Disabled".
Video RAM Cacheable : Select "Enabled" allows caching of the video BIOS, resulting in better
system performance. However, if any program writes to this memory area, a system error may
result. The settings are: "Enabled" and "Disabled".
Memory Hole At 15M-16M : In order to improve performance, certain space in memory can be
CMOS Setup Utility – Copyright © 1984-2001 Award Software
Advanced Chipset Features
3
Auto
Auto
Auto
Enabled
Enabled
Disabled
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Enabled
64MB
Auto
ATX
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Item Help
Menu Level
All the entries on the screen are