American Megatrends III - Manual (Page 59)

Chapter 2 WINBIOS Setup 55
PCI/PnP Setup, Continued
IRQ3
IRQ4
IRQ5
IRQ7
IRQ9
IRQ10
IRQ11
IRQ12
IRQ14
IRQ15
These options specify the bus that the specified IRQ line is used on. These
options allow you to reserve IRQs for legacy ISA adapter cards. These options
determine if AMIBIOS should remove an IRQ from the pool of available
IRQs passed to devices that are configurable by the system BIOS. The
available IRQ pool is determined by reading the ESCD NVRAM. If more
IRQs must be removed from the pool, the end user can use these options to
reserve the IRQ by assigning an ISA setting to it. Onboard I/O is configured
by AMIBIOS. All IRQs used by onboard I/O are configured as PCI, PnP, or
PCI/PnP. IRQ14 and 15 will not be available if the onboard Triton 2 PCI IDE
is enabled. If all IRQs are set to ISA and IRQ14 and 15 are allocated to the
onboard PCI IDE, IRQ9 will still be available for PCI and PnP devices,
because at least one IRQ must be available for PCI and PnP devices. The
settings are ISA, PnP, PCI/PnP, or PCI. The Optimal and Fail-Safe default
settings are:
Option Optimal Default Fail-Safe Default
IRQ3 PnP PCI/PnP
IRQ4 PnP PCI/PnP
IRQ5 PCI/PnP PCI/PnP
IRQ7 PnP PCI/PnP
IRQ9 PCI/PnP PCI/PnP
IRQ10 PCI/PnP PCI/PnP
IRQ11 PCI/PnP PCI/PnP
IRQ12 PnP PnP
IRQ14 PCI/PnP PCI/PnP
IRQ5 PCI/PnP PCI/PnP
Cont’d