User's Manual

Chapter 5 Installation
22 AI5VG Pentium VP3 Baby AT Motherboard User’s Manual
5.3 J2: ATX Power Supply Connector
J2 is a 20-pin ATX power supply connector. Refer to the following table
for the pin out assignments.
Signal Name Pin # Pin # Signal Name
3.3V 11 1 3.3V
-12V 12 2 3.3V
Ground 13 3 Ground
PS-ON 14 4 +5V
Ground 15 5 Ground
Ground 16 6 +5V
Ground 17 7 Ground
-5V 18 8 Power good
+5V 19 9 5VSB
+5V 20 10 +12V
11 1
20 10
5.4 J1, J4: AT Keyboard and PS/2 Mouse Connectors
J1: AT Keyboard Connector
Pin # Signal Name
1 Keyboard clock
2 Keyboard data
3 N.C.
4 GND
5 5V
J4: PS/2 Mouse Connector
Pin # Signal Name
1 Mouse data
2 N.C.
3 GND
4 5V
1
5
5 Mouse Clock