Chapter 2 WINBIOS Setup
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/EISA setting to it. Onboard I/O is
configured by AMIBIOS. All IRQs used by onboard I/O are configured as
PCI/PnP.
IRQ12 only appears if the Mouse Support option in Advanced Setup is set to
Disabled.
IRQ14 and 15 will not be available if the onboard Triton PCI IDE is enabled. If
all IRQs are set to ISA/EISA 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/EISA or PCI/PnP. The Optimal and Fail – Safe default
settings for IRQ3 through 7 are ISA/EISA. The Optimal and Fail – Safe default
settings for IRQ0 through 15 are PCI/PnP.
Cont’d