AR-B1476 User
’
s Guide
3-3
3.2.2 FDD Port Connector (CN2)
The AR-B1476 provides a 34-pin header type connector for supporting up to two floppy disk drives.
To enable or disable the floppy disk controller, please use the BIOS Setup program.
1
2
Figure 3-3 CN2: FDD Port connector
Pin Signal
Pin Signal
1-33(odd) GROUND
18 -DIRECTION
2
DRVEN 0
20
-STEP OUTPUT PULSE
4
NOT USED
22
-WRITE DATA
6
DRVEN 1
24
-WRITE GATE
8 -INDEX
26
-TRACK
0
10
-MOTOR ENABLE 0
28
-WRITE PROTECT
12
-DRIVE SELECT 1
30
-READ DATA
14
-DRIVE SELECT 0
32
-SIDE 1 SELECT
16
-MOTOR ENABLE 1
34
DISK CHANGE
Table 3-2 FDD Pin Assignment
3.2.3 Parallel Port Connector (CN4)
To use the parallel port, an adapter cable has to be connected to the CN4 (26-pin header type) connector. This
adapter cable is mounted on a bracket and is included in your AR-B1476 package. The connector for the parallel
port is a 25 pin D-type female connector.
1
2
1
14
13
25
D-Type Connector
Parallel Port Connector
Figure 3-4 CN4: Parallel Port Connector
CN4
DB-25 Signal CN4
DB-25
Signal
1
1
-Strobe
2
14
-Auto Form Feed
3 2
Data
0
4 15
-Error
5 3
Data
1
6 16 -Initialize
7
4
Data 2
8
17
-Printer Select In
9 5
Data
3
10 18
Ground
11
6 Data
4
12
19
Ground
13
7 Data
5
14
20
Ground
15
8 Data
6
16
21
Ground
17
9 Data
7
18
22
Ground
19
10 -Acknowledge 20 23
Ground
21
11 Busy 22
24
Ground
23
12 Paper 24
25
Ground
25
13
Printer Select
26
--
No Used
Table 3-3 Parallel Port Pin Assignment
