Onboard Serial Port 2 - MSI MS-5148 User Manual

Onboard Serial Port 2

Disabled/(3F8/IRQ4)/(2F8/IRQ3)/(3E8/IRQ4)/(2E8/IRQ3)
The system has an On-board Super I/O chipset with 2 serial ports. The On-
board serial ports can be selected as:
Disabled
3F8/IRQ4
2F8/IRQ3
3E8/IRQ4
2E8/IRQ3
Note: Because the ISA Bus Interrupt accepts low to high edge trigger, the
interrupt request line can not be shared by multiple sources. If an
off-board ISA add-on card with a serial port is installed the user may
have to disable the on-board serial port because it will conflict with
IRQ request line for the off-board serial port.
UART 2 MODE
Standard/ASKIR/
HPSIR(i.e. IRDA)
IR Function Duplex
Half/Full
COMM1 uses IRQ4
COMM2 uses IRQ3
COMM3 uses IRQ4
COMM4 uses IRQ4
The system's built-in IR (Infra Red) is on the on-
board Super I/O chipset and is shares serial port
2 with UART 2. Only one option can be
selected for serial port 2, either the IR or UART.
Selecting the IR mode will prompt the following
message:
Users can choose between operating the IR in Half
duplex or Full duplex mode. Half duplex designates one
IR as a receiver and one as a transmitter simultane
ously. Full duplex mode designates that the two IRs
receive and transmit data together simultaneously.
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