AR-B8172 User Manual
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3E8/IRQ4
Set this value to allow the serial port to use 3E8 as its I/O port address and IRQ 4 for the interrupt
address. If the system will not use a serial device, it is best to set this port to disabled.
2E8/IRQ3
Set this value to allow the serial port to use 2E8 as its I/O port address and IRQ 3 for the interrupt
address. If the system will not use a serial device, it is best to set this port to disabled.
Option
Description
Normal
Set this value to allow the standard parallel port mode to be used. This is the default setting.
Bi-Directional
lSet this value to allow data to be sent to and received from the parallel port.
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 bi-directional
data transfer driven by the host device.
EPP
The parallel port can be used with devices that adhere to the Extended Capabilities Port
(ECP) specification. ECP uses the DMA protocol to achieve data transfer rates up to 2.5
Megabits per second. ECP provides symmetric bi-directional communication.
Option
Description
5
Set this value to allow the serial port to use Interrupt 3.
7
Set this value to allow the serial port to use Interrupt 7. This is the default setting. The
majority of parallel ports on computer systems use IRQ7 and I/O Port 378H as the standard
setting.
