Asus P2-99B P2-99B User Manual - Page 50

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

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IV. BIOS SETUP Onboard Parallel Port (378H/IRQ7) This field sets the address of the onboard parallel port connector. You can select either: 378H / IRQ 7, 278H / IRQ 5, Disabled. If you install an I/O card with a parallel port, ensure that there is no conflict in the address assignments. The PC can support up to three parallel ports as long as there are no conflicts for each port. 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 bidirectional parallel port operation at maximum speed; ECP allows the parallel port to operate in bidirectional mode and at a speed faster than the maximum unidirectional 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 Disable. 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-compliant infrared module connector under in HARDWARE SETUP. 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 field autodetects Ultra DMA capability (for improved transfer speeds and data integrity) for compatible IDE devices. Set to Disable to suppress Ultra DMA capability. 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. The default setting of Auto will allow autodetection to ensure optimal performance. IV. BIOS SETUP Chipset Features 50 ASUS P2-99B User's Manual

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ASUS P2-99B User’s Manual
50
IV.
BIOS SETUP
Onboard Parallel Port (378H/IRQ7)
This field sets the address of the onboard parallel port connector. You can select either:
378H / IRQ 7, 278H / IRQ 5, Disabled.
If you install an I/O card with a parallel port,
ensure that there is no conflict in the address assignments. The PC can support up to
three parallel ports as long as there are no conflicts for each port.
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 unidirectional
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
Disable
.
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-compliant infrared module connector
under in
HARD-
WARE SETUP.
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 field autodetects Ultra DMA capability (for improved transfer speeds and data in-
tegrity) for compatible IDE devices. Set to
Disable
to suppress Ultra DMA capability.
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. The default setting of
Auto
will allow
autodetection to ensure optimal performance.
IV.
BIOS SETUP
Chipset Features