Asus P4B266 User Manual

Page 49

ASUS P4B266 motherboard user guide

2-27

3. Floppy disk drive connector (34-1 pin FLOPPY)

This connector supports the provided floppy drive ribbon cable. After
connecting one end to the motherboard, connect the other end to the
floppy drive. (Pin 5 is removed to prevent incorrect insertion when
using ribbon cables with pin 5 plug).

4. Chassis open alarm lead (4-1 pin CHASSIS)

This lead is for a chassis designed with intrusion detection feature.
This requires an external detection mechanism such as a chassis
intrusion sensor or microswitch. When you remove any chassis
component, the sensor triggers and sends a high-level signal to this
lead to record a chassis intrusion event.

If you do not wish to use the chassis intrusion lead, place a jumper cap
over the pins labeled “Chassis Signal” and “Ground” to close the
circuit.

P4B266

P4B266 Chassis Alarm Lead

CHASSIS

+5VSB_MB

Chassis Signal

GND

P4B266

NOTE: Orient the red markings on
the floppy ribbon cable to PIN 1.

P4B266 Floppy Disk Drive Connector

PIN 1

FLOPPY