Intel ICH10R User Manual page 29

(10) IR infrared module Headers (5-pin): IR1
This connector supports the optional wireless transmitting and receiving infrared
module. You must configure the setting through the BIOS setup to use the IR function.
(11) Serial COM Port header: COM1
COM1 is a 9-pin RS232 connector.
(12) SPDIF Out header: HDMI_SPDIF
The SPDIF output is capable of providing digital audio to external speakers or compressed
AC3 data to an external Dolby digital decoder. Use this feature only when your stereo system
has digital input function.
IR
2 6
Pin 1 5
IR infrared module Headers
Pin1
Serial COM Port 9-pin Block
HDMI_SPDIF_OUT
24
SPDIF
GND
1
2