American Megatrends MAN-758 manual IRQ3 IRQ4 IRQ5 IRQ7 IRQ9 IRQ10 IRQ11 IRQ12 IRQ14 IRQ15

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

68MegaRUM PCI Motherboard User’s Guide