CPU fan
Pin
Signal
1
GND
2
+12V
3
TACH1
4
PWM
5
TACH2
FDD
Pin
Signal
Pin
Signal
1
Ground
18
FLP_DIR#
2
FLP_LOWDEN#
19
Ground
3
Tach
20
FLP_STEP#
4
FLP_WDO
21
Ground
5
MT
22
FLP_STEP#
6
Unused
23
Ground
7
Ground
24
FLP_WRTEN#
8
FLP_INDEX#
25
Ground
9
Ground
26
FLP_TRACK#
10
FLP_MOTOR#
27
Ground
11
Ground
28
FLP_WP#
12
Unused
29
Ground
13
Ground
30
FLP_RD_D#
14
FLP_SEL_A#
31
Ground
15
Ground
32
FLP_HD_SEL#
16
Unused
33
Ground
17
Ground
34
FLP_DSKCHG#
ENWW
197