Nvidia MCP 78S User Manual page 22

(10) IR infrared module Headers (5-pin): IR
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 the 9-pin block pin-header. The On-board serial port can be disabled
through BIOS SETUP. Please refer to Chapter 3 "INTEGRATED PERIPHERALS
SETUP" section for more detail information
(12) Parallel Port Header (25-pin male): PARALLEL
The On-board Parallel Port can be disabled through the BIOS SETUP. Please
refer to Chapter 3 "INTEGRATED PERIPHERALS SETUP" section for more
detail information.
(13) 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
Pin 1
PARALLEL Connector
18