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IV. BIOS SOFTWARE
CPU to PCI Posted Write (Enabled)
This is a mechanism that, when Enabled, improves the performance of CPU to PCI
memory write and CPU to Idle data port write.
ROM Cycle Wait States (1-Wait): Timing for 16-bit ISA cards. Leave on default.
16-bit I/O Recovery Time (5 BUSCLK): Timing for 16-bit ISA cards. Leave on default.
8-bit I/O Recovery Time (8 BUSCLK): Timing for 8-bit ISA cards. Leave on default.
ISA Bus Clock (PCICLK/4): Timing for the ISA bus clock. Leave on default.
Memory Hole at Address (None)
This feature reserves memory address space, 15M-16M, 14M-16M, or 12M-16M, to
ISA expansion cards that specifically require this setting. This, however, makes the
memory from the specified and up unavailable to the system because expansion
cards can only access memory up to 16MB.
Refresh Cycle Time (187.2 us)
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 187.2 us.
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.
Onboard VGA Memory Size (1MB)
This function allows the user to allocate either 1MB, 2MB or 4MB memory for the
onboard video controler. Larger memory allows more colors and a higher resoultion
to be selected within each operating system.
Onboard VGA Memory Clock (Leave on default setting of Fast)
This function allows the selection of the video speed. Normal uses 50MHz, Fast
uses 60MHz, and Fastest uses 66MHz. If your monitor displays unrecognizable in-
formation, you must decrease the speed to match your monitor's frequency rate.
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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, 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. Two options are available: No Swap and Swap AB. If you want to switch
drive letter assignments through the onboard chipset, set this field to Swap AB.
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ASUS SP98-N User's Manual
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