MATSONIC MS7112C Manual page 21

Audio Connectors & Infrared Connector
SPDIF1
1
1
1. If you want to install an optional Serial Infrared Port, connect the
cable from the optional IR port to the SIR1 connector on the
mainboard.
Note: An infrared port (SIR1) and a second serial port (COM2)
share the same resources. If you install both of these options, you
cannot use them both at the same time. Use the setup utility to
configure the system to use either the infrared port or the second
serial port. See Chapter 3 for more information.
2. The mainboard has three audio connectors. CD1 is a 4-pin audio
connector which can be used to input the audio from a CD-ROM or
DVD drive. CD2 is exactly the same, except that it supports an
alternative kind of connector. Use either CD1 or CD2 to connect your
CD/DVD drive audio output. If you have installed a device which
supports 24-bit SPDIF digital audio, you can connect the device to
the SPDIF input/output connector SPDIF1.
CD1
CD2
SIR1
19