American Megatrends Apollo IV User Manual page 34

Step 6 Attach Cables,
Block Connector The Apollo IV motherboard has a 22-pin header that is used to connect the
following offboard connectors. The header is on the corner of the
motherboard near the CPU socket.
Pins 12 13 14 15
1 2 3 4 5
Pins
Connector
Speaker
IDE LED
Remote Power Switch (Power when low).
Hardware Reset Switch
Power LED (lit when power is on)
Keyboard Lock
Turbo LED (lit when low speed is active)
Suspend Mode Switch (Suspend when
Low)
Suspend LED (lit when system in suspend
mode)
30 Apollo IV PCI Pentium ISA Motherboard User's Guide
Continued
16 17 18 19
6 7
8 9
Signal Descriptions
Pin 12 VCC
Pin 13 Ground
Pin 14 Ground
Pin 15 Speaker Data
Pin 16 LED Power
Pin 17 IDE Active
Pin 18 Remote Power
Pin 19 Ground
Pin 20 Hard Reset
Pin 21 Ground
Pin 1 +Power
Pin 2 Ground
Pin 4 Keyboard Lock
Pin 5 Ground
Pin 6 TURBO_LIT
Pin 7 TURBO_LEDPWR
Pin 8 Suspend In Switch
Pin 9 Ground
Pin 10 Suspend Out LED+
Pin 11 Suspend Out LED-
20 21
10 11