Asus P5-99B User Manual download pdf (Page 56)

ASUS P5-99B User’s Manual56

Chipset Features

IV. BIOS SETUP

Chipset Features

Parallel Port Mode (ECP+EPP)

This field allows you to set the operation mode of the parallel port. The setting

Normal, allows normal-speed operation but in one direction only; EPP allows bidi-

rectional parallel port operation at maximum speed; ECP allows the parallel port to

operate in bidirectional mode and at a speed faster than the maximum data transfer

rate; ECP+EPP allows normal speed operation in a two-way mode.

ECP DMA Select (3)

This selection is available only if you select ECP or ECP+EPP in the

Parallel Port Mode. Select either DMA Channel 1, 3, or Disabled.

UART2 Use Infrared (Disabled)

When enabled, this field activates the onboard infrared feature and sets the second serial

UART to support the infrared module connector on the motherboard. If your system

already has a second serial port connected to the onboard COM2 connector, it will no

longer work if you enable the infrared feature. By default, this field is set to Disabled,

which leaves the second serial port UART to support the COM2 serial port connector.

See IrDA/Fast IR-Compliant Infrared Mdule Connector under section III.

Onboard PCI IDE Enable (Both)

You can select to enable the Primary IDE channel, Secondary IDE channel, Both, or

Disable both channels (for systems with only SCSI drives).

IDE Ultra DMA Mode (Auto)

This sets the IDE UltraDMA to be active when using UltraDMA-capable IDE de-

vices. The BIOS will automatically adjust or disable this setting for slower IDE

devices so that Auto or high settings will not cause problems for older IDE devices.

Choose Disable if you do not want this feature for all devices.

IDE 0 Master/Slave PIO/DMA Mode, IDE 1 Master/Slave PIO/DMA Mode (Auto)

Each channel (0 and 1) has both a master and a slave making four IDE devices possible.

Because each IDE device may have a different Mode timing (0, 1, 2, 3, 4), it is necessary

for these to be independent. PIO and DMA timings can be independently set. The default

setting of Auto will allow autodetection to ensure optimal performance.

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Asus P5-99B User Manual Page 56