AA280 Motherboard
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Onboard FDC Controller
This option enables the onboard floppy disk drive controller.
Onboard Serial Port 1
This option is used to assign the I/O address and interrupt request (IRQ) for the onboard serial
port 1 (COM1).
Onboard Serial Port 2
This option is used to assign the I/O address and interrupt request (IRQ) for the onboard serial
port 2 (COM2).
UART Mode Select
This field is available if the Onboard Serial Port 2 field is set to any option but Disabled. UART
Mode Select enables you to select the infrared communication protocol: Normal (default), IrDA,
or ASKIR. IrDA is an infrared communication protocol with a maximum baud rate up to 115.2K
bps. ASKIR is Sharp's infrared communication protocol with a maximum baud rate up to 57.6K
bps.
UR2 Duplex Mode
This field is available when UART 2 Mode is set to either ASKIR or IrDA. This item enables you
to determine the infrared function of the onboard infrared chip. The options are Full and Half
(default).
Full-duplex means that you can transmit and send information simultaneously. Half-duplex is
the transmission of data in both directions, but only one direction at a time.
Onboard Parallel Port
This option is used to assign the I/O address and interrupt request (IRQ) for the onboard paral-
lel port.
Parallel Port Mode
Enables you to set the data transfer protocol for your parallel port. There are four options: SPP
(Standard Parallel Port), EPP (Enhanced Parallel Port), ECP (Extended Capabilities Port) and
ECP+EPP.
SPP allows data output only. Extended Capabilities Port (ECP) and Enhanced Parallel Port (EPP)
are bi-directional modes, allowing both data input and output. ECP and EPP modes are only sup-
ported with EPP- and ECP-aware peripherals.
ECP Mode Use DMA
When the onboard parallel port is set to ECP mode, the parallel port can use DMA 3 or DMA 1.
