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24 ASUS P/I-P55T2P4S User’s Manual
5. External Connectors
IMPORTANT: Ribbon cables should always be connected with the red stripe on
the Pin 1 side of the connector. The four corners of the connectors are labeled on
the motherboard. Pin 1 is the side closest to the power connector on hard drives
and floppy drives. IDE ribbon cable must be less than 18in. (46cm), with the
second drive connector no more than 6in. (15cm) from the first connector.
1. Keyboard Connector (5-pin female)
This connection is for a standard IBM-compatible keyboard. May also be known
as a 101 enhanced keyboard.
Keyboard Connector (5-pin female)
This motherboard accepts an AT Keyboard
Connector Plug as shown here.
Keyboard Connector
2. PS/2 Mouse Connector (6-pin block)
If you are using a PS/2 mouse, you must purchase an optional PS/2 mouse set
which connects to the 6 pin block and mounts to an open slot on your computer's
case. The system will direct IRQ12 to the PS/2 mouse if one is detected. If not
detected, expansion cards can use IRQ12. See “PS/2 Mouse Control” in BIOS
Features Setup of the BIOS SOFTWARE section.
PS/2 Mouse Module Connector
1: GND
2: DATA
3: NC
4: VCC
5: CLK
8: NC
1
3
4
2
5
8
1
3
4
2
5
8
This optional PS/2 mouse cable
and bracket set is necessary to
provide a connector for a PS/2
mouse on a free expansion slot
cover.
(Motherboard)
(Cable Set)
WARNING: Some pins are used for connectors or power sources. These are
clearly separated from jumpers in "Map of the Motherboard" on page 4. Plac-
ing jumper caps over these will cause damage to your motherboard.
III. INSTALLATION
(Connectors)
III. INSTALLATION