(Chipset

.IV

Features)

BIOS

 

 

IV. BIOS SOFTWARE

Delayed Transaction (Disabled)

If Enabled, this frees the PCI Bus during CPU accessing of 8-bit ISA cards which normally consume about 50-60 PCI Clocks without PCI delayed transaction. If PCI Bus Masters cannot use the PCI Bus, leave this on the default setting of Disabled for some ISA cards that are not PCI 2.1 compliant.

16-bit I/O Recovery Time (1 BUSCLK)Timing for 16-bit ISA cards8-bit I/O Recovery Time (1 BUSCLK)Timing for 8-bit ISA cardsVideo BIOS Cacheable (Enabled)

Allows the Video BIOS to be cached to allow faster execution. Leave on default setting of Enabled for better performance, otherwise Disabled.

Memory Hole at Address (None)

This features reserves either 14MB-16MBor 15MB-16MBmemory address space to ISA expansion cards that specifically require this setting. Memory from 14MB and up or 15MB and up will be unavailable to the system because expansion cards can only access memory up to 16MB.

....................................................................................................................................

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 reverses the 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, set this field to Swap AB, and the swap will be controlled in hardware. This works separately from the BIOS Features floppy disk swap feature. It is functionally the same as physically interchanging the connectors of the floppy disk drives.

Onboard Serial Port 1 (3F8H/IRQ4)

Settings are 3F8H/IRQ4, 2F8H/IRQ3, 3E8H/IRQ4, 2E8H/IRQ10, and Disabled for the onboard serial connector.

Onboard Serial Port 2 (2F8H/IRQ3)Settings are 3F8H/IRQ4, 2F8H/IRQ3, 3E8H/IRQ4, 2E8H/IRQ10, and Disabled forthe onboard serial connector.

46

ASUS TX97-X User's Manual