MSI MS-6380 User Manual page 74

Chapter 3
PCI Latency Timer
This item controls how long each PCI device can hold the bus before
another takes over. When set to higher values, every PCI device can
conduct transactions for a longer time and thus improve the effective PCI
bandwidth. For better PCI performance, you should set the item to higher
values. Settings range from 32 to 248 at a 32 increment.
Primary Graphics Adapter
This item specifies which VGA card is your primary graphics adapter.
Settings: AGP and PCI.
PCI Slot1/5 IRQ, PCI Slot2 IRQ, PCI Slot3 IRQ, PCI Slot4 IRQ
This item specifies the IRQ line for each PCI slot. Settings: 3, 4, 5, 7, 9, 10,
11 and Auto. Selecting Auto allows BIOS to automatically determine the IRQ
line for each PCI slot.
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 avail-
able 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.
IRQ 3/4/5/7/9/10/11/14/15
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 configured by AMIBIOS. All IRQs used by onboard I/O are
configured as PCI/PnP. If all IRQs are set to ISA/EISA, and IRQ 14/15 are
allocated to the onboard PCI IDE, IRQ 9 will still be available for PCI and PnP
devices. Available settings: ISA/EISA and PCI/PnP.
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