
Chapter 3: System BIOS Setup
DMA Channel 7
These options specify if the named DMA channel is available for use on the ISA/EISA
bus or for PnP (Plug and Play). The settings are
ISA/EISA
or
PnP.
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/PCI
setting to it.
Onboard I/O is configured by AMIBIOS. All IRQs used by onboard I/O are
configured as
PCI/PnP.
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/PCI
or
PCI/PnP.
The Optimal and Fail-Safe default settings for IRQ3 through 7 are
ISA/PCI.
The Optimal and Fail-Safe default settings
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.
Содержание ATX431
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