If you are connecting a 3.5" floppy drive, you may have trouble
determining which pin is pin number 1. Look for a number
printed on the circuit board indicating pin number 1. Also, the
connector on the floppy drive connector may have a slot. When the
slot is up, pin number 1 should be on the right.
Check the documentation that came with the drive for more
information.
Pin Signal Pin Signal
1 GND 2 Drive Density Select 0
3 GND 4 N.C.
5 GND 6 Drive Density Select 1
7 GND 8 Index
9 GND 10 Motor Control 0
11 GND 12 Drive Select 1
13 GND 14 Drive Select 0
15 GND 16 Motor Control 1
17 GND 18 Direction
19 GND 20 Step
21 GND 22 Write DATA
23 GND 24 Write GATE
25 GND 26 TRACK0
27 GND 28 Write Protect
29 GND 30 Read Data
31 GND 32 Head Select
33 GND 34 Disk Change
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