Additional Usb 2.0 Port Headers; Internal Audio Connector - Abit AX78 User Manual

1.8.3 Additional USB 2.0 Port Headers

Each header supports 2x additional USB 2.0 ports by connecting bracket or cable to the rear I/O
panel or the front-mounted USB ports of your chassis.
Make sure the connecting cable bears the same pin assignment.
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1.8.4 Internal Audio Connector

This connector connects to the audio output of internal CD-ROM drive or add-on card.
AX78
Pin Pin Assignment
1 VCC
3 Data0 -
5 Data0 +
7 Ground
Pin Pin Assignment
2 VCC
4 Data1 -
6 Data1 +
8 Ground
10 NC
1-15