SBC comm AMD SBC-770 - Manual (Page 46)

Chapter 2 Installation 35
Floppy drive connector (CN12)
Floppy drive connector (CN12)
Pin Signal Pin Signal
1 GND 2 DENSITY SELECT
3 GND 4 N/C
5 GND 6 DRIVE TYPE
7 GND 8 INDEX
9 GND 10 MOTOR 0
11 GND 12 DRIVE SELECT 1
13 GND 14 DRIVE SELECT 2
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 DELECT
33 GND 34 DISK CHANGE