440EX/LX AT
MAINBOARD
HARDWARE SETUP
3-4
(B) CN1: PS/2 Mouse and Keyboard Connector
CN4
CN 5
BAT 1
CN
1
SYS.
B
IO
S
+
-
CN10
CN11
CN6
SL
O
T
1
CN
7
CN 9
CN
8
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
1
2
3
4
5
Mouse Data
No Connection
Ground
+5V DC
Mouse Clock
CN 1
(C) CN2: CPU Cooling Fan Power Connector
CN4
CN 5
BAT 1
CN
1
SYS
. B
IO
S
+
-
CN10
CN11
CN6
SLO
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 19
CN 2
CN2 CPU Cooling Fan
Ground
+ 12V DC
Fan Sense Signal
1
2
3
(D) CN3: Keyboard Connectors
Either the PS/2 type (CN3) or the AT type (CN4) keyboard connector can be
installed here, ( only one connector can be installed) The factory default is the AT
type connector installed on the board. When the AT type connector is installed,
CN3 becomes invisible because it is covered by the AT type keyboard connector.
