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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-