SOYO SY-P4VDA User Manual page 23

Hardware Installation
5. ATX Power On/Off Switch
Attach the 2-pin momentary type switch to the PWRBT header for turning
On or Off your ATX power supply.
D. Back Panel Connections
All external devices such as the PS/2 keyboard, PS/2 mouse, printer,
modem, USB can be plugged directly onto the Motherboard back panel.
Only after you have fixed and locked the Motherboard to the computer
case can you start connecting the external peripheral devices.
When connecting an external device, use the following figure to locate and
identify which back panel connector to plug the device to.
PS/2 KB
Connector
USB 1_2
COM A
COM B
PRT
AOUT
AIN
AMIC
PWRBT Pin Assignment
Power On/Off
PS/2 Mouse
Connector
1
GND
20
SY-P4VDA