Aaeon SBC-558P, Manual

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Chapter 3 Award BIOS Setup 61
On board Parallel Port Mode
Two bidirectional parallel ports. Supports SPP, ECP, EPP,
ECP + EPP.
ECP Mode Use DMA
Select a DMA channel for the port.
Watch Dog Timer
You can enable the system watchdog timer, a hardware timer that
generates either an NMI or a reset when the software that it
monitors does not respond as expected each time the watch dog
polls it ( select the time period in a separate field ) The choice:
Disabled, 10 sec, 20 sec, 30 sec, 40 sec, 1 min, 2 min, 4 min.
UART2 Duplex Mode
Select the value required by the IR device connected to the IR prot.
Full-duplex mode permits simultaneous two-direction transmission.
Half-duplex mode permits transmission in one direction only at a
time. If no infrared port is present in the system, select disable
RXD,TXD Active
Consult your IR peripheral documention to select the correct
setting of the TxD and RxD signals.
IR Transmission delay
The choice: Eable, Disable