VIA 693A ATX
MAINBOARD
AWARD BIOS SETUP
4-14
Reset Configuration Data :
Disabled : The system BIOS will do nothing.
Enabled : The system BIOS will clear (reset) the ESCD data during “POST”. After
clearing the ESCD data, the system BIOS will then change this item‘s
value back to “Disabled”, otherwise, the ESCD data will become useless.
IRQ# / DMA# assigned to :
There are only 15 IRQs and 8 DMAs available on the mainboard and most of them
are assigned for some specific purposes. Sometimes, user may feel like to have
some more IRQ and DMA in order to install the new add on cards. In this case, you
may use this field to assign some of the IRQ and DMA to “PCI/ISA PnP” so that
the new add on card will find the free IRQ or DMA available for it.
Legacy : The system BIOS will skip and never assign the specified IRQ/DMA
ISA
resource to PCI or ISA PnP devices and the IRQ and DMA can only be sued
by their specified Legacy ISA cards.
PCI/ISA:
When “PCI/ISA PnP” is selected, the related IRQ and DMA will be
PnP
released and they can be used by other PCI or ISA devices. Whenever
there is the new PCI or ISA devices plugged onto the mainboard, system
BIOS will detect it and assign a free IRQ or DMA for the new devices.
.Note: Most IRQ and DMA have its own purpose and they can not be assigned to
“PCI/ISA PnP”. For example, IRQ14 and IRQ15 is used by the onboard IDE
device. If you change the setting on IRQ14 and IRQ15, you will be unable to
connect the hard disk drive or CD ROM drive to the IDE interface on the
mainboard. So please make sure to check the IRQ and DMA arrangement in
your system before you proceed to do the setting. For instance, if you do not
have the printer (IRQ7) or PS/2™ mouse (IRQ12) connected to your PC
system, you may assign IRQ7 and IRQ12 to “PCI/ISA PnP” so that you can
have more IRQs available for new add on cards.
CPU to PCI Write Buffer:
(Default setting: “Enabled”)
When enabled, up to four Dwords of data can be written to the PCI bus without
interrupting the CPU. When disabled, no write buffer is used and the CPU read cycle
will not be completed until the PCI bus signals that it is ready to receive the data..
PCI Dynamic Bursting:
(Default setting: “Enabled”)
When
Enabled,
every write transaction goes to the write buffer. Burstable
transactions then burst on the PCI bus and non-burstable transactions don’t.
