Motherboard Technical Specification
Page
32
PCI Slot1 IRQ Priority
PCI Slot2 IRQ Priority
PCI Slot3 IRQ Priority
PCI Slot4 IRQ Priority These options specify the IRQ priority for PCI devices installed in the PCI
expansion slots. The settings are Auto, (IRQ) 3, 4, 5, 7, 9, 10, and 11, in
priority order. The Optimal and Fail-Safe default settings are Auto.
DMA Channel 0
DMA Channel 1
DMA Channel 3
DMA Channel 5
DMA Channel 6
DMA Channel 7
These options allow you to specify the bus type used by each DMA channel. The
settings are PnP or ISA/EISA . The Optimal and Fail-Safe default settings are PnP.
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 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 are PCI/PnP.
Reserved Memory Size This option specifies the size of the memory area reserved for legacy ISA
adapter cards. The settings are Disabled, 16K, 32K, or 64K. The Optimal and
Fail-Safe default settings are Disabled.
Reserved Memory Address This option specifies the beginning address (in hex) of the reserved
memory area. The specified ROM memory area is reserved for use by
legacy ISA adapter cards.
This option does not appear if the Reserved Memory Size option is set to Disabled.
The settings are C0000, C4000, C8000, CC000, D0000, D4000, D8000, or DC000. The
Optimal and Fail-Safe default settings are N/A.