Asus P5QL-CM - Manual (Page 48)

1-36 Chapter 1: Product introduction
11. Serial port connectors (10-1 pin COM1)
The connector is for a serial (COM) port. Connect the serial port module
cable to the connector, then install the module to a slot opening at the back of
the system chassis.
The serial port bracket (COM1) is purchased separately.
12. LPT connector (26-1 pin LPT)
The LPT (Line Printing Terminal) connector supports devices such as a
printer. LPT standardizes as IEEE 1394, which is the parallel port interface on
IBM PC-compatible computers.
P5QL-CM Serial port (COM1) connector
P5QL-CM
PIN 1
COM1
P5QL-CM Parallel Port Connector
P5QL-CM
PIN 1
LPT
STB#
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
ACK#
BUSY
PE
SLCT
AFD
ERR#
INIT#
SLIN#
GND
GND
GND
GND
GND
GND
GND
GND