Abit BP6, User Manual

Page: 60 / 102

3-30 Chapter3
BP6
For the relations between the hardware layout of PIRQ (the signals from the PIIX4 chipset),
INT# (means PCI slot IRQ signals) and devices, please refer to the table below:
Signals
PCI slot 1
AGP slot
PCI slot 2 PCI slot 3
PCI slot 4
PCI slot 5
PIRQ_0 INT A INT D INT C INT B
PIRQ_1 INT B INT A INT D INT C
PIRQ_2 INT C INT B INT A INT D
PIRQ_3 INT D INT C INT B INT A
!
USB used PIRQ_3.
!
Each PCI slot has four INT#s (INT A~INT D), and the AGP slot has two INT# (INTA and
INT B).
NOTE
!
PCI slots 4 and 5 use the same bus master control signal, therefore; you can’t install
two PCI cards that will occupy the bus master signal into both PCI slots 4 and 5 at
same time. What kind of PCI card needs to use the bus master signal? Generally
speaking, most of the PCI cards need to use the bus master signal, but some Add-on
cards such as the Voodoo series of graphics cards and some PCI-VGA and LAN cards
don't occupy the bus master signal.
!
PCI slot 3 shares IRQ signals with the HPT366 IDE controller (Ultra ATA/66). The
driver for HPT 366 IDE controller supports IRQ sharing with other PCI devices. But
if you install a PCI card that doesn’t allow IRQ sharing with other devices into PCI
slot 3, you may encounter some problems. Furthermore, if your Operating System
doesn’t allow peripheral devices to share IRQ signals with each other--Windows NT
for example, you can’t install a PCI card into PCI slot 3.
3-7. Load Setup Defaults
Setup defaults are the settings that allow your system to operate at its highest performance.
When you choose this option, the following message is displayed:
“Load Setup Defaults (Y/N)? N”
If you want to use BIOS Setup default values, press “Y”, then <Enter> to complete the
loading of the settings for best performance.
You should first load the best settings, than enter the CPU Soft Menu to set up CPU
parameters, otherwise the BIOS will replace set parameters by default parameters.