ASUS XG-DLS User’s Manual 53
IV. BIOS SOFTWARE
IV. BIOS
Plug & Play / PCI
DMA x Used By ISA (No/ICU)
These fields indicate whether or not the displayed DMA channel for each field is
being used by a legacy (non-PnP) ISA card. Available options include: No/ICU and
Yes. The first option, the default setting, indicates either that the displayed DMA
channel is not used or an ICU is being used to determine if an ISA card is using that
channel. If you install a legacy ISA card that requires a unique DMA channel, and
you are not using an ICU, you must set the field for that channel to Yes.
ISA MEM Block BASE (No/ICU)
This field allows you to set the base address and block size of a legacy ISA card that
uses any memory segment within the C800H and DFFFH address range. If you
have such a card, and you are not using an ICU to specify its address range, select a
base address from the six available options; the ISA MEM Block SIZE field will
then appear for selecting the block size. If you have more than one legacy ISA card
in your system that requires to use this address range, you can increase the block
size to either 8K, 16K, 36K, or 64K. If you are using an ICU to accomplish this task,
leave ISA MEM Block BASE to its default setting of No/ICU.
Onboard AHA BIOS (Auto)
The default uses Auto settings for the onboard Adaptec 7896 SCSI BIOS. If you do
not want to use the onboard Adaptec 7896 SCSI BIOS, choose Disabled.
ONB AHA BIOS First (No)
This field allows you to give priority to the onboard SCSI BIOS for SCSI functions
over other add-on SCSI controllers. The default is No.
SCSI Channel B/A Term (Enabled)
The onboard SCSI chipset supports dual channels. There are three SCSI connectors
on the motherboard. The ULTRA2SCSIA (68-pin) connector uses channel A and the
FASTSCSI (50-pin) and ULTRA2SCSIB (68-pin) connectors use channel B.
When termination is enabled for a particular channel, the relevant connector can
only be used to connect a single-ended SCSI cable. If you want to use a double-
ended configuration, you must disable the termination for that channel.
USB IRQ (Enabled)
Enabled reserves an IRQ# for the USB to work, Disabled does not allow the USB to
have an IRQ# and therefore prevents the USB from functioning. If you are not using
any USB devices, you may set this feature to Disabled to save an extra IRQ# for
expansion cards.
VGA BIOS Sequence (PCI/AGP)
If your computer has both PCI and AGP VGA cards, this field allows you to select
which of the cards will act as your primary card. The default, PCI/AGP, allows your
PCI card to take precedent when detected. AGP/PCI uses the AGP card as your
primary card.
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