ATX ULi M1689, User Manual

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Chapter 3
30
Onboard FDC Controller
This feature allows users to enable or disable the floppy disk controller.
Onboard Serial Port 1
This feature allows users to select the I/O address and IRQ for the first serial port.
Auto is recommended. Nevertheless, you can manually choose another I/O port or
IRQ if a certain I/O port or IRQ is needed. Disabling this feature can free up the I/O
port and IRQ resources for other devices.
Onboard Serial Port 2
This feature allows users to select the I/O address and IRQ for the second serial port.
Auto is recommended. Nevertheless, you can manually choose another I/O port or
IRQ if a certain I/O port or IRQ is needed. Disabling this feature can free up the I/O
port and IRQ resources for other devices.
UART Mode Select
This feature allows you to select the Infra Red (IR) standard to be used.
RxD, TxD Active
This BIOS feature allows you to set the infra-red reception ( RxD ) and transmission
( TxD ) polarity.
It is usually found under the Onboard Serial Port 2 BIOS feature and is linked to the
second serial port. So, if you disable that port, this feature will disappear from the
screen or appear grayed out.
There are four options available, based on combinations of Hi and Lo. You'll need to
consult your IR peripheral's documentation to determine the correct polarity.
Choosing the wrong polarity will prevent a proper IR connection from being
established with the IR peripheral.
IR Transmission Delay
This item allows you to enable/ disable IR transmission delay. This field only
configurable if
“
UART Mode
”
is set to
“
ASKIR
”
or
“
IrDA
”
.
UR2 Duplex Mode
This BIOS feature allows you to determine the transmission mode of the IR
(Infra-Red) communications port.
Selecting Full-Duplex permits simultaneous two-way transmission, like a
conversation over the phone.
Selecting Half-Duplex , on the other hand, only permits transmission in one direction
at any one time, which is more like a conversation over the walkie-talkie.
Naturally, the Full-Duplex mode is the faster and more desirable choice. You should