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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 uses. Use these
options to reserve IRQs for legacy ISA adapter cards. The setting determines
if AMIBIOS should remove an IRQ from the pool of available IRQs passed to
devices that can be configured by the system BIOS. The BIOS reads the
ESCD NVRAM to find all available IRQs. If more IRQs must be removed
from the pool, 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 PnP. IRQ12 only appears if the PS/2 Mouse
Support option in Advanced Setup is set to Disabled. IRQ14 and 15 are not
available if the onboard PCI IDE is enabled. If all IRQs are set to ISA and
IRQ14 and 15 are allocated to the onboard PCI IDE, IRQ9 is still available
because at least one IRQ must be available for PCI and PnP devices. The
settings are ISA, Auto, PnP, Primary PCI, or Secondry PCI. The Optimal and
Fail-Safe default settings are Auto.
Cont’d