Asus SP98AGP-X SP98AGP-X User Manual - Page 45

MB-16MB, 14MB-16MB, 15MB-16MB, Enabled, Disabled, Swap AB, No Swap, 3F8H/IRQ4, 2F8H/IRQ3, 3E8H/

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BIOS Features IV. BIOS SOFTWARE Graphics Aperture Size (64MB) (Leave on default setting of 64MB) Memory-mapped, graphics data structures can reside in a Graphics Aperture. Memory Hole at Address (None) This features reserves either 12MB-16MB, 14MB-16MB, or 15MB-16MB memory address space to ISA expansion cards that specifically require this setting. Memory from either 12MB and up, 14MB and up, or 15MB and up will be unavailable to the system because expansion cards can only access memory up to 16MB. Refresh Queue Depth (12) This function sets the DRAM refresh rate. A slow refresh cycle time increases the bandwidth available for data transfers. NOTE: Some DRAMs are known to lose data without frequent refreshing so the default is set at 0. Delayed Transaction (Enabled) The default setting of Enabled frees the PCI Bus during CPU accessing of 8-bit ISA cards, which normally consume about 50-60 PCI clocks without PCI delayed transaction. For PCI bus masters that cannot use the PCI Bus and some ISA cards that are not PCI 2.1 compliant, set this to Disabled. DRAM are 64 (Not 72) bits wide This motherboard does not have parity support, thus DRAM modules are always 64 bits wide. Data Integrity Mode (None) The setting None has byte-wise write capability but no provision for protecting data integrity in the DRAM array. You can enable the ECC function if ECC-supported DIMM is used. (See section III for more information on memory modules.) ...Onboard FDC Controller (Enabled) When enabled, this field allows you to connect your floppy disk drives to the onboard floppy drive connector instead of a separate controller card. If you want to use a different controller card to connect the floppy drives, set this field to Disabled. Onboard FDC Swap A & B (No Swap) This field allows you to reverse the hardware drive letter assignments of your floppy disk drives through the onboard chipset. If you want to switch drive letter assignments, set this field to Swap AB. Default setting is No Swap. Onboard Serial Port 1 (3F8H/IRQ4) and Onboard Serial Port 2 (2F8H/IRQ3) Settings are 3F8H/IRQ4, 2F8H/IRQ3, 3E8H/IRQ4, 2E8H/IRQ10, and Disabled for the onboard serial connectors. Default setting for Serial Port 1 is 3F8H/IRQ4, while for Serial Port 2 is 2F8H/IRQ3. IV. BIOS Chipset Features ASUS SP98AGP-X User's Manual 45

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ASUS SP98AGP-X User’s Manual
45
IV.
BIOS SOFTWARE
BIOS Features
IV.
BIOS
Chipset Features
Graphics Aperture Size (64MB)
(Leave on default setting of
64MB)
Memory-mapped, graphics data structures can reside in a Graphics Aperture.
Memory Hole at Address (None)
This features reserves either
12MB-16MB
,
14MB-16MB
,
or
15MB-16MB
memory
address space to ISA expansion cards that specifically require this setting. Memory
from either 12MB and up, 14MB and up, or 15MB and up will be unavailable to the
system because expansion cards can only access memory up to 16MB.
Refresh Queue Depth (12)
This function sets the DRAM refresh rate. A slow refresh cycle time increases the
bandwidth available for data transfers.
NOTE:
Some DRAMs are known to lose
data without frequent refreshing so the default is set at
0
.
Delayed Transaction (Enabled)
The default setting of
Enabled
frees the PCI Bus during CPU accessing of 8-bit ISA
cards, which normally consume about 50–60 PCI clocks without PCI delayed trans-
action. For PCI bus masters that cannot use the PCI Bus and some ISA cards that are
not PCI 2.1 compliant, set this to
Disabled
.
DRAM are 64 (Not 72) bits wide
This motherboard does not have parity support, thus DRAM modules are always 64
bits wide.
Data Integrity Mode (None)
The setting
None
has byte-wise write capability but no provision for protecting data
integrity in the DRAM array. You can enable the ECC function if ECC-supported
DIMM is used. (See section III for more information on memory modules.)
....................................................................................................................................
Onboard FDC Controller (Enabled)
When enabled, this field allows you to connect your floppy disk drives to the on-
board floppy drive connector instead of a separate controller card. If you want to use
a different controller card to connect the floppy drives, set this field to
Disabled
.
Onboard FDC Swap A & B (No Swap)
This field allows you to reverse the hardware drive letter assignments of your floppy
disk drives through the onboard chipset. If you want to switch drive letter assign-
ments, set this field to
Swap AB
. Default setting is
No Swap
.
Onboard Serial Port 1 (3F8H/IRQ4)
and
Onboard Serial Port 2 (2F8H/IRQ3)
Settings are
3F8H/IRQ4
,
2F8H/IRQ3, 3E8H/IRQ4, 2E8H/IRQ10,
and
Disabled
for
the onboard serial connectors. Default setting for Serial Port 1 is
3F8H/IRQ4
, while
for Serial Port 2 is
2F8H/IRQ3.