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4. BIOS SETUP
4. BIOS SETUP
VGA Palette
Snoop Bit
Action
Disabled
Data read and written by the CPU is only directed to the PCI
VGA device's palette registers.
Enabled
Data read and written by the CPU is directed to the both the
PCI VGA device's palette registers and the ISA VGA
device palette registers, permitting the palette
registers of both devices to be identical.
This option must be set to
Enabled
if any ISA adapter card installed in the system
requires VGA palette snooping.
Allocate IRQ to PCI VGA
This options allow you to reserve IRQ for PCI VGA devices.
DMA Channel 0/1/3/5/6/7
These options allow you to specify the bus type used by each DMA channel.
IRQ3/4/5/7/9/10/11/14/15
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.