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54 SBC-456/456E User Manual
Onboard Serial Port2
This option enables serial port 2 on the motherboard and speci-
fies the base I/O port address for serial port 2. The settings are
Auto. Disabled, 3F8h, 2F8h, 3E8h, and 2E8h. The default
setting is Auto.
Onboard Parallel Port
This option enables the parallel port on the motherboard and
specifies the parallel port base I/O port address. The settings are
Auto, Disabled, 378, 378, and 3BC. The default setting is Auto.
Parallel Port Mode
This option specifies the parallel port mode. ECP and EPP are
both bidirectional data transfer sechemes that adhere to the IEEE
P1284 specification. The settings are:
Setting Description
Normal
The normal parallel port mode is used. This is the
default setting.
EPP
The parallel port can be used with devices that adhere
to the Enhanced Parallel Port (EPP) specification.
EPP uses the existing parallel port signals to provide
asymmetric bidirectional data transfer driven by the
host device.
ECP
The parallel port can be used with devices that adhere
to the Extended Capabilities Port (ECP) specification.
ECP uses the DMA protocol to achieve transfer rates
of approximately 2.5 Mbs. ECP provides symmetric
bidirectional communications.