440EX/LX AT
MAINBOARD
AWARD BIOS SETUP
4-15
PNP OS Installed :
( Default setting is “No” )
The setting in this field tells the system BIOS whether your operating system (OS) is a
PnP OS (such as Windows® 95) or not. A PnP OS will use the system resources record
stored in the ESCD segment to arrange the system environment..
Resources Controlled by :
Manual : The system BIOS will not refer to the ESCD data to assign IRQ & DMA.
Instead, it will refer to the information recorded in this field when assigning
the IRQ & DMA resource. ( anyhow, the system BIOS will always refer to
the ESCD data to assign the I/O and memory space resources ).
Auto
: The system BIOS will refer to the ESCD segment for all legacy information.
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 certain 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 the “PCI/ISA PnP” is been selected, the related IRQ and DMA
PnP
will be released and they can be used by other PCI or ISA PnP devices.
Whenever
there is the new PCI or ISA
PnP
devices plugged onto the
mainboard, the system BIOS will detect it and assign a free IRQ or DMA
for the new devices.
