User Guide

Introduction of BIOS 3-19

Memory Hole At 15M-16M:

This option is used to free up the 15M-16M memory block. Some special

peripherals need to use a memory block located between 15M and 16M, and

this memory block has a size of 1M. We recommend that you disable this

option.

Passive Release:

Two options are available: Enabled and Disabled. Set the option to enabled

or disabled passive release for the Intel PIIX4 chip (Intel PCI to ISA bridge).

This function is used to meet the latency of the ISA bus master, if you have

an ISA card compatibility problem, you can try to enable or disable this

option for optimal result.

Delayed Transaction:

Two options are available: Enabled and Disabled. Set the option to enabled

or disabled delayed transaction for the Intel PIIX4 chip. This function is used

to meet the latency of PCI cycles to or from the ISA bus. This option must be

enabled to provide PCI 2.1 compliance. If you have ISA card compatibility

problem, you can try to enable or disable this option for optimal result.

AGP Aperture Size (MB):

Seven options are available: 4 Î 8 Î 16 Î 32 Î 64 Î 128 Î 256 Î

Back to 4

. This option specifies the amount of system memory that can be used

by the AGP device. The aperture is a portion of the PCI memory address

range dedicated for graphics memory address space.

Spread Spectrum Modulated:

Two options are available: Disabled and Enabled. For EMC (

lectro-

agnetic

ompatibility Test) testing may need to adjust these options for

optimal result, we do not recommend you change the default, except for

special reasons. Some values you select may cause system instability under

some situations, please be careful.

Thermal & Fan Monitor:

These items list current states of system temperature and fan speed. It can not

be changed by user.

Voltage Monitor:

This items lists the voltage states of the system power. Just like Thermal &

Fan Monitor, it is unchangeable.