jetway alioth ユーザーズマニュアル

ページ / 48
 
 
 
                                                                                                                                                                                                                                                                                                                                                
 
 
 
 
25 
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 
You can reserve this area of system memory for ISA adapter ROM.  When this area is 
reserved, it cannot be cached.  The user information of peripherals that need to use this area of 
system memory usually discusses their memory requirements. The settings are: Enabled and 
Disabled. 
Delay Transaction 
The chipset has an embedded 32-bit posted write buffer to support delay transactions cycles.  
Select Enabled to support compliance with PCI specification version 2.1.  The settings are: 
Enabled and Disabled. 
AGP Transfer Mode 
In this item you can select AGP transfer mode Auto/4X/1X the Default setting is Auto. 
 
3-6-1   DRAM Timing Settings 
CMOS Setup Utility – Copyright(C) 1984-2002 Award Software 
DRAM Timing Settings 
 
Item Help 
 
    Auto Configuration           Standard 
    SDRAM CAS Latency Time       2.5 
    SDRAM Cycle Time             7 
    SDRAM RAS# to CAS# Delay     3 
    SDRAM RAS# Precharge Time    3 
     
   
 
  Menu Level >> 
↑↓→←
 Move Enter:Select +/-/PU/PD:Value F10:Save ESC:Exit  F1:General Help 
F5:Previous Values    F6:Optimized Defaults   F7:Standard Defaults 
SDRAM CAS Latency Time  
When synchronous DRAM is installed, the number of clock cycles of CAS latency depends 
on the DRAM timing.  The settings are: 2T and 2.5T. 
Note:  Change these settings only if you are familiar with the chipset. 
SDRAM RAS# to CAS# Delay 
This field let’s you insert a timing delay between the CAS and RAS strobe signals, used when 
DRAM is written to, read from, or refreshed.  Fast gives faster performance; and Slow gives 
more stable performance.  This field applies only when synchronous DRAM is installed in the 
system.  The settings are: 2T, 3T and 4T. 
SDRAM RAS# Precharge Time 
If an insufficient number of cycles is allowed for the RAS to accumulate its charge before 
DRAM refresh, the refresh may be incomplete and the DRAM may fail to retain date.  Fast 
gives faster performance; and Slow gives more stable performance.  This field applies only 
when synchronous DRAM is installed in the system.  The settings are: 2T, 3T and 4T. 
3-7  Integrated Peripherals