Chapter 3. BISO Setup
32
User’s Manual
Primary Graphics Adapter:
Initialize the PCI video display card on a PCI slot before initialize any other
display device on the system. Thus the PCI slot display card becomes the primary display. Available options are
[PCI] and [AGP].
PCI VGA Palette Snoop:
When this option is set to Enabled, multiple VGA devices operating on different
buses can handle data from the CPU on each set of palette registers on every video device. Bit 5 of the
command register in the PCI device configuration space is the VGA Palette Snoop bit (0 is disabled). For
example: if there are two VGA devices in the computer (one PCI and one ISA) and:
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. The Optimal and Fail-Safe default settings are Disabled.
OffBoard PCI IDE Card:
This option specifies if an offboard PCI IDE controller adapter card is used in the
computer. You must also specify the PCI expansion slot on the motherboard where the offboard PCI IDE
controller card is installed. If an offboard PCI IDE controller is used, the motherboard onboard IDE controller is
automatically disabled. The settings are Disabled, Auto, Slot1, Slot2, Slot3, Slot4, Slot5, or Slot6. If Auto is
selected, AMIBIOS automatically determines the correct setting. The Optimal and Fail-Safe default settings are
Auto. This option forces IRQ14 and 15 to a PCI slot on the PCI local bus. This is necessary to support
non-compliant PCI IDE adapter cards.
OffBoard PCI IDE Primary IRQ:
This option specifies the PCI interrupt used by the primary IDE channel on
the offboard PCI IDE controller. The settings are Disabled, Hardwired, INTA, INTB, INTC, or INTD. The
Optimal and Fail-Safe default settings are Disabled.
OffBoard PCI IDE Secondary IRQ:
This option specifies the PCI interrupt used by the secondary IDE
channel on the offboard PCI IDE controller. The settings are Disabled, Hardwired, INTA, INTB, INTC, or INTD.
The Optimal and Fail-Safe default settings are Disabled.
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 0/1/3/5/6/7:
These items specify the bus that the system DMA(Direct Memory Access)
channel is used. The settings determine if AMIBIOS should remove a DMA from the available DMAs passed to
devices that are configurable by the system BIOS. The available DMA pool is determined by reading the ESCD
NVRAM. If more DMAs must be removed from the pool, the end user can reserve the DMA by assigning an
ISA/EISA setting to it.
IRQ3/4/5/7/9/10/11/14/15:
These items specify the bus where the specified IRQ line is used. The
settings 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 IRQ pool, the end user can use these settings to reserve the IRQ by
assigning an ISA/EISA setting to it. Onboard I/O is configures by AMIBIOS. All IRQs used by onboard I/O are
configured as PCI/PnP. If all IRQs are set to ISA/EISA, and IRQ14/15 are allocated to the onboard PCI IDE,
IRQ9 will still be available for PCI and PnP devices. Settings: ISA/EISA and 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,32, 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.
