Asus P2B - Manual (Page 51)

ASUS P2B User’s Manual 51
IV. BIOS SETUP
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.
SYMBIOS SCSI BIOS (Auto)
[Auto] allows the motherboard’s BIOS to detect whether you have a Symbios SCSI
card. If a Symbios SCSI card is detected, the motherboard’s Symbios BIOS will be
enabled; if no Symbios SCSI card is detected, the onboard Symbios SCSI BIOS will
be disabled.
[Disabled] will disable the motherboard’s Symbios SCSI BIOS so that the BIOS on
an external Symbios SCSI card can be used. (If your Symbios SCSI card does not
have a BIOS, the Symbios SCSI card will not function.)
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 pri-
mary card.