Foxconn P35A-S English manual - Page 46

►Allocate IRQ to PCI VGA

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3 ►IRQ 3/4/5/7/9/10/11/14/15, DMA Channel 0/1/3/5/6/7 These items are used to set if the PCI/PnP card assign IRQ/DMA automatically. [Available] : Specified IRQ/DMA is available to be used by PCI/PnP devices. [Reserved] : Specified IRQ/DMA is reserved for use by legacy ISA or PCI PnP devices. ► Plug & Play O/S This item is used to set the plug and play function for your OS. [No] : Let the BIOS configure all the devices in the system. [Yes] : Let the operating system configure plug and play devices not required for boot if your system has a plug and play operating system. ► PCI Latency Timer This item is used to set the PCI latency timer. The value is in unit of PCI cycle for PCI device latency timer register. Setting values are 32, 64, 96, 128, 160, 192, 224, 248. This feature controls how long each PCI device can hold the bus before another takes over. The larger the value, the longer the PCI device can retain control of the bus. Low values for the PCI Latency Timer will reduce the effective PCI bandwidth while higher values means every PCI device will have to wait longer before they can get access to the bus, but when they do get access, they can conduct their transactions for a longer time. Normally, a default value of 64 cycles is set. Some PCI devices may not agree with longer latency times so if you start facing problems like stuttering sound or a less responsive system, reduce the latency. Higher values will actually reduce performance as too much time may be allocated to each PCI device to the disadvantage of other devices on the bus. ►Allocate IRQ to PCI VGA This item is used to allocate IRQ to PCI VGA. Many high-end graphics cards may require an IRQ to function properly. Disabling this feature with such cards will cause improper operation and/or poor performance. Thus, it is best to make sure you enable this feature if you are having problems with your graphics card. Check your graphics card's manual. If it states that the card does not require an IRQ, then you can disable this feature to release an IRQ for other uses. It is best to leave this setting enabled (i.e. Yes) unless you really need the IRQ for other purposes. [Yes] : Assigns IRQ to PCI VGA card if it requires an IRQ. [No] : Does not assign an IRQ to PCI VGA card. ► Palette Snooping This option is only useful if you use an MPEG card or an add-on card that makes use of the graphics card's Feature Connector. It corrects incorrect color reproduction by "snooping" into the graphics card's frame buffer memory and modifying (synchronizing) the information delivered from the graphics card's Feature Connector to the MPEG or add-on card. It will also solve the problem of display inversion to a black screen after using the MPEG card. Graphics card's Feature Connector normally stays at top edge of the graphics card. ► PCI IDE BusMaster This item is used to control whether the PCI IDE bus master is enabled. If enabled, the PCI IDE bus mastering controller can access the PCI bus directly to achieve a faster throughput. 39

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39
►IRQ 3/4/5/7/9/10/11/14/15, DMA Channel 0/1/3/5/6/7
These items are used to set if the PCI/PnP card assign IRQ/DMA automatically.
[Available] : Specified IRQ/DMA is available to be used by PCI/PnP devices.
[Reserved] : Specified IRQ/DMA is reserved for use by legacy ISA or PCI PnP devices.
► Plug & Play O/S
This item is used to set the plug and play function for your OS.
[No] : Let the BIOS configure all the devices in the system.
[Yes] : Let the operating system configure plug and play devices not required for boot if your
system has a plug and play operating system.
► PCI Latency Timer
This item is used to set the PCI latency timer. The value is in unit of PCI cycle for PCI device
latency timer register. Setting values are 32, 64, 96, 128, 160, 192, 224, 248.
This feature controls how long each PCI device can hold the bus before another takes over.
The larger the value, the longer the PCI device can retain control of the bus. Low values for
the PCI Latency Timer will reduce the effective PCI bandwidth while higher values means
every PCI device will have to wait longer before they can get access to the bus, but when they
do get access, they can conduct their transactions for a longer time. Normally, a default value
of 64 cycles is set. Some PCI devices may not agree with longer latency times so if you start
facing problems like stuttering sound or a less responsive system, reduce the latency. Higher
values will actually reduce performance as too much time may be allocated to each PCI device
to the disadvantage of other devices on the bus.
►Allocate IRQ to PCI VGA
This item is used to allocate IRQ to PCI VGA.
Many high-end graphics cards may require an IRQ to function properly. Disabling this feature
with such cards will cause improper operation and/or poor performance. Thus, it is best to
make sure you enable this feature if you are having problems with your graphics card. Check
your graphics card's manual. If it states that the card does not require an IRQ, then you can
disable this feature to release an IRQ for other uses. It is best to leave this setting enabled (i.e.
Yes) unless you really need the IRQ for other purposes.
[Yes] : Assigns IRQ to PCI VGA card if it requires an IRQ.
[No] : Does not assign an IRQ to PCI VGA card.
► Palette Snooping
This option is only useful if you use an MPEG card or an add-on card that makes use of the
graphics card's Feature Connector. It corrects incorrect color reproduction by "snooping"
into the graphics card's frame buffer memory and modifying (synchronizing) the information
delivered from the graphics card's Feature Connector to the MPEG or add-on card. It will also
solve the problem of display inversion to a black screen after using the MPEG card. Graphics
card's Feature Connector normally stays at top edge of the graphics card.
► PCI IDE BusMaster
This item is used to control whether the PCI IDE bus master is enabled. If enabled, the PCI
IDE bus mastering controller can access the PCI bus directly to achieve a faster throughput.