AMD KM780V - Manual (Page 15)

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(11) HDMI_SPDIF_Out header: SPDIF_Out
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. Some of the VGA Card need connect
SPDIF_IN Connector, so its HDMI Port can make sounds.
3-3 Jumper Setting
(1) Keyboard/USB function Enabled/Disabled: JP1
Keyboard/Mouse & USB Power On Setting
2-3 Closed KB/USB Power ON Enabled
JP1 JP1
1-2 Closed KB/USB Power ON Disable (Default)
(2) CMOS RAM Clear (3-pin): JBAT
A battery must be used to retain the motherboard configuration in CMOS RAM short 1-2
pins of JPAT to store the CMOS data.
To clear the CMOS, follow the procedure below:
1. Turn off the system and unplug the AC power
2. Remove ATX power cable from ATX power connector
3. Locate JBAT and short pins 2-3 for a few seconds
4. Return JBAT to its normal setting by shorting pins 1-2
5. Connect ATX power cable back to ATX power connector
1 2
HDMI_SPDIF_OUT GND
SPDIF