440EX/LX AT
MAINBOARD
HARDWARE SETUP
3-9
(I) CN10: COM A (Serial Port 1) Connector
CN11: COM B (Serial Port 1) Connector
CN4
CN 5
BAT 1
CN
1
S
YS.
BI
O
S
+
-
CN10
CN11
CN6
SL
O
T
1
CN
7
CN
9
CN
2
CN 16
CN
1
5
CN
1
4
CN17
CN18
RS
HL
TL
SL
PW
PL KBLOCK
SPKR
JP 7
JP 8
JP 9
JP 3
JP
4
JP
5
JP
6
JP 11
CN 8
CN 1
9
CN 10
COM A
CN 11
COM B
Ping assignment of serial port connector:
1 6
Pin # Signal name
Pin # Signal name
1
DCD (Data Carrier Detect)
6
DSR (Data Set Ready)
2
RD (Received Data)
7
RTS (Request To Send)
3
TD (Transmit Data)
8
CTS (Clear To Send)
4
DTR (Data Terminal Ready)
9
RI (Ring Indicator)
5
Ground
5 9
I/O address 3F8H/2F8H/3E8H/2E8H, IRQ3/IRQ4, selected by CMOS setup.