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Floppy Disk Connector (J4) - Pinout
Pin
Signal
Number
Flow
1
-
3
-
5
-
7
-
9
-
11
-
13
-
15
-
17
-
19
-
21
-
23
-
25
-
27
-
29
-
31
-
33
-
* Active low signal
1
By default, these pins are not connected, however, by installing the W30 and W31
jumpers, these configurations are possible:
17
-
GND
27
-
GND
29
I
EDOUT (2.88MB)
33
I
HDOUT (2.88MB)
Signal
Pin Number
GND
2
GND
4
GND
6
GND
8
GND
10
GND
12
GND
14
GND
16
1
N. C.
18
GND
20
GND
22
GND
24
GND
26
1
N. C.
28
1
N. C.
30
GND
32
1
N. C.
34
Or:
17
27
29
33
Signal
Signal
Flow
O
RPM/LC
-
Not Used
-
Not Used
I
INDEX*
O
MOTOR ON 0,1*
O
DRIVE SELECT B
O
DRIVE SELECT A
O
MOTOR ON 2*
O
DIR CONTROL
O
STEP*
O
WRITE DATA*
O
WRITE ENABLE*
I
TRACK0*
I
WRITE PROTECT*
I
READ DATA*
O
HEAD SELECT
I
DSKCHG
I
EDOUT (2.88MB)
I
HDOUT (2.88MB)
-
GND
-
GND
Appendices
18-31
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