Apollo IV PCI Pentium ISA Motherboard User’s Guide
30
Step 6 Attach Cables,
Continued
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
16 17
18 19
20 21
1 2 3 4
5
6 7
8 9
10 11
Pins
Connector
Signal Descriptions
Speaker
Pin 12
VCC
Pin 13
Ground
Pin 14
Ground
Pin 15
Speaker Data
IDE LED
Pin 16
LED Power
Pin 17
IDE Active
Remote Power Switch (Power when low).
Pin 18
Remote Power
Pin 19
Ground
Hardware Reset Switch
Pin 20
Hard Reset
Pin 21
Ground
Power LED (lit when power is on)
Pin 1
+Power
Pin 2
Ground
Keyboard Lock
Pin 4
Keyboard Lock
Pin 5
Ground
Turbo LED (lit when low speed is active)
Pin 6
TURBO_LIT
Pin 7
TURBO_LEDPWR
Suspend Mode Switch (Suspend when
Low)
Pin 8
Suspend In Switch
Pin 9
Ground
Suspend LED (lit when system in suspend
mode)
Pin 10
Suspend Out LED+
Pin 11
Suspend Out LED-