49
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.
4.7.5 Allocate IRQ to PCI VGA
This option allows you to reserve IRQ for PCI VGA device.
4.7.6 DMA Channel 0/1/3/5/6/7
These options allow you to specify the bus type used by each DMA channel.
4.7.7 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 configuration 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.
Summary of Contents for DR742e
Page 1: ...Advanced Socket 370 Motherboard DR742e User s Manual...
Page 8: ...8 Contents...
Page 10: ...10 1 Introduction...
