13
COM 3 Optional RS-422/485 serial port (CN11)
Pin
Signal
DB9 Pin #
1 NC
NC
2 NC
Tx+(A)
3 Tx+(A)
Tx-(B)
4 Rx+(A)
NC
5 Tx-(B)
NC
6 Rx-(B)
NC
7 NC
Rx+(A)
8 NC
Rx-(B)
9 GND
NC
10
NC
--
Speaker (CN13)
Pin Signal
1
S
2
NC
3
Speaker -
Floppy drive connector (CN12)
Pin
Signal
Pin
Signal
1 GND
2 DENSITY
SELECT
3 GND
4 N/C
5 GND
6 N/C
7 GND
8 INDEX
9
GND
10
MOTOR 0
11
GND
12
DRIVE SELECT 1
13 GND
14 DRIVE
SELECT
0
15 GND
16 MOTOR
1
17 GND
18 DIRECTION
19 GND
20 STEP
21 GND
22 WRITE
DATA
23 GND
24 WRITE
GATE
25 GND
26 TRACK
0
27 GND
28 WRITE
PROTECT
29 GND
30 READ
DATA
31 GND
32 HEAD
SELECT
33 GND
34 DISK
CHANGE
