Abit BH6, User Manual

Page: 39 / 98

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
(
8
(
16
(
32
(
64
(
128
(
256
(
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.
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.
Note: The monitor features for temperature, fans and voltages will occupy the
I/O address from 294H to 297H. If you have a network adapter, sound
card or other add-on cards will use those I/O address, so please adjust
your add-on card I/O address, to avoid the use of those address, because
those addresses will occupied by the LM79, and cannot changed.