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ECB-865
ECB-865 User’s Manual 63
4.3.5.2 Clear NVRAM
This option is used to clear NVRAM and check or update ESCD (Extended System
Configuration Data) data after system power on. Set this option to No that will not clear
NVRAM and the operation of update ESCD is effective in different ESCD data comparison.
If you select the “Yes” setting, then the BIOS will update ESCD each time of power on.
4.3.5.3 PCI Latency Timer (PCI Clocks)
This option sets the latency of all PCI devices on the PCI bus. The settings are in units
equal to PCI clocks. The settings are 32, 64, 96, 128, 160, 192, 224, or 248. The Optimal
and Fail-Safe default settings are 64.
4.3.5.4 PCI / VGA Palette Snoop
Leave this field at Disabled.
Choices are Enabled, Disabled.
4.3.5.5 Allocate IRQ to PCI VGA
Enable/Disable to assign a IRQ for PCI VGA.
Choices are Yes, No.
4.3.5.6 PCI IDE BusMaster
Set this option to Enabled to specify that the IDE controller on the PCI local bus supports
bus mastering capability. The settings are Disabled or Enabled. The default setting is
Disabled.
4.3.5.7 DMA Channel 0/1/3/5/6/7
Legacy ISA for devices compliant with the original PC AT bus specification, PCI/ISA PnP
for devices compliant with the Plug and Play standard whether designed for PCI or ISA
bus architecture.
Choices are ISA/EISA and PnP.
4.3.5.8 IRQ3/4/5/7/9/10/11/14/15
These options specify the bus that the named interrupt request lines (IRQs) are used on.
These options allow you to specify IRQs for use by legacy ISA adapter cards. These
options determine if AMIBIOS should remove an IRQ from the pool of available IRQs
passed to BIOS configurable devices. 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 PCI/PnP Setup options to remove the IRQ by assigning the option to the ISA/EISA
setting. Onboard I/O is configurable by AMIBIOS. The IRQs used by onboard I/O are
configured as PCI/PnP. The settings are PCI/PnP or ISA/EISA. The default settings are
PCI/PnP.