QDI PlatiniX 4N Series Manual page 12

Line-in jack, Microphone-in jack, Speaker-out jack and MIDI/Joystick
Connector (Available on P4N-A P4N-AL Mainboard)
Parallel Port, Serial Port Connectors (UART1, UART2)
Parallel Port
UART1
USB3, USB4 Connectors
Speaker out
Line in
+5V
D1-
D1+
GND
GND
MIDI/Joystick
Microphone in
UART2
GND
GND
D0+
D0-
+5V
1