6ABX3
I440BX Main Board
20
COM1/COM2
The onboard serial port 1 and port 2 are the 9-pin D-subminature male
connector COM1 and COM2. COM1 and COM2 can be disabled in BIOS
setup. Please refer to Chapter 3 “Integrated Peripherals” for more information.
Pin
Signal
Pin
Signal
Pin 1
Carrier detect (CD)
Pin 5 Signal ground
Pin 2
Receive data (RXD)
Pin 6 Data set ready
Pin 3
Transmit data (TXD)
Pin 7 Request to send (RTS)
Pin 4
Data therminal ready (DTR)
Pin 8 Clear to send (CTS)
Pin 9
Ring indicator
L P T: P a ralle l P o rt
C O M 1
V G A
C O M 2
P in 1