Intel I815E User Manual download pdf (Page 38)

BIOS SETUP

34 I815E User’s Manual

Advanced Chipset Features

This Setup menu controls the configuration of the chipset.

Advanced Chipset Features

SDRAM CAS Latency Time 3 ITEM HELP

SDRAM Cycle Time Tras/Trc Auto Menu Level

SDRAM RAS-to-CAS Delay Auto

SDRAM RAS Precharge Time Auto

System BIOS Cacheable Disabled

Video BIOS Cacheable Disabled

CPU Latency Timer Enabled

Delayed Transaction Enabled

AGP Graphics Aperture Size 64MB

System Memory Frequency 100Mhz

On-Chip Video Window Size 64MB

SDRAM CAS Latency Time

You can select CAS latency time in HCLKs of 2/2 or 3/3. The system

board designer should set the values in this field, depending on the

DRAM installed. Do not change the values in this field unless you change

specifications of the installed DRAM or the installed CPU. The choices

are 2 and 3.

SDRAM Cycle Time Tras/Trc

The default setting for the SDRAM Cycle Time Tras/Trc is Auto.

SDRAM RAS-to-CAS Delay

You can select RAS to CAS Delay time in HCLKs of 2/2 or 3/3. The

system board designer should set the values in this field, depending on the

DRAM installed. Do not change the values in this field unless you change

specifications of the installed DRAM or the installed CPU. The choices

are Auto, 2 and 3.

SDRAM RAS Precharge Time

This option defines the length of time for Row Address Strobe is allowed

to precharge. The choices are Auto, 2 and 3.

System BIOS Cacheable

The setting of Enabled allows caching of the system BIOS ROM at

F000h-FFFFFh, resulting in better system performance. However, if any

program writes to this memory area, a system error may result.

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Intel I815E User Manual Page 38