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P4X2-A MAINBOARD SERIES
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UR2 Duplex Mode
This field appears in an infrared port mode. You have two options: half or full duplex func-
tion. The full duplex mode allows bi-directional transmission at a single time where as the
half duplex mode only allows transmission in one direction at a time. This setting depends
on the nature of your IR peripheral device. Check the IR device’s manual to determine the
appropriate setting.
Use IR Pins
To determine the correct settings for the TxD and RxD signals of your IR peripheral compo-
nent, you need to consult the components manual.
Onboard Parallel Port
This item allows you to determine the I/O address and the IRQ for the onboard parallel port.
The default settings are adequate and should not give you any problems. If they do you can
try to change them.
Onboard Parallel Mode
This field allows you to select an operating mode for the onboard parallel (printer) port.
Select Normal, Compatible, or SPP unless you are certain your hardware and software both
support one of the other available modes.
EPP Mode Select
This field allows you to choose the EPP version you want to use. We recommend that you
use EPP 1.9 for the best performance but if you do you may have some connection problems
so try setting it to EPP 1.7.
ECP Mode Use DMA
This item allows you to select a DMA channel for the parallel port for use during ECP.
Game Port Address
This field allows you to select the I/O address for the onboard game port. The default is
201.
Midi Port Address
This field allows you to select the I/O address for the onboard MIDI port. The default is 330.
MIDI Port IRQ
This field allows you to select the IRQ for the onboard MIDI port. The default is 10.
USB Keyboard Support
This field should only be enabled if you are using a USB keyboard. If you are not using this
kind of keyboard you should disable it.
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