Asus P5A-B P5A-B User Manual - Page 53

DMA x Used By ISA No/ICU

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Plug & Play/PCI Load Setup Defaults IV. BIOS IV. BIOS SOFTWARE 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. USB Function (Disabled) This motherboard supports Universal Serial Bus (USB) devices. Set to Enabled if you want to use USB devices. Your system must support USB function. The default setting is Disabled. USB IRQ (Auto) This field allows you to reserve an IRQ# (5, 7, 9, 10, 11, 12, 14, or 15) for the USB to work. Auto assigns an IRQ# automatically to your USB device. If you are not using a USB device, you may disable this feature by setting it to NA to save an extra IRQ# for other devices or 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. Onboard Audio Chip (Enabled) This field allows you to enable the onboard audio. If you do not want to use the onboard audio, select Disabled. Available only on motherboards with the audio option. To resolve conflicts with the onboard audio, use the table on the following page for system resource allocation. This field is available only on motherboards with the onboard audio option. IV. BIOS ASUS P5A-B User's Manual 53

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ASUS P5A-B User’s Manual
53
IV.
BIOS SOFTWARE
IV.
BIOS
Load Setup Defaults
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
.
USB Function (Disabled)
This motherboard supports Universal Serial Bus (USB) devices. Set to
Enabled
if
you want to use USB devices. Your system must support USB function. The default
setting is
Disabled
.
USB IRQ (Auto)
This field allows you to reserve an IRQ# (
5
,
7
,
9
,
10
,
11
,
12
,
14
, or
15
)
for the USB
to work.
Auto
assigns an IRQ# automatically to your USB device. If you are not
using a USB device, you may disable this feature by setting it to
NA
to save an extra
IRQ# for other devices or 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.
Onboard Audio Chip (Enabled)
This field allows you to enable the onboard audio. If you do not want to use the onboard
audio, select
Disabled
. Available only on motherboards with the audio option. To re-
solve conflicts with the onboard audio, use the table on the following page for sys-
tem resource allocation. This field is available only on motherboards with the onboard
audio option.