Asus Vintage - Manual (Page 54)

54 Chapter 4: Motherboard information
11. Chassis intrusion connector (4-1 pin CHASSIS1)
This connector 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.
12. Serial port connector (10-1 pin COM2)
This connector accommodates a second serial port using an optional
serial port bracket. Connect the bracket cable to this connector then install
the bracket into a slot opening at the back of the system chassis.
P4S800-MX Chassis intrusion connector
CHASSIS1
+5VSB_MB Chassis Signal GND
(Default)
AD1888
CODEC
AD1888
CODEC
P4S800-MX Serial port connector
PIN 1
COM2