Global American 2807770, User Manual

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Appendix A <I/O Port Pin Assignment>
A.1 <Floppy Port>
Connector: FDD
Type: 34-pin (2 x 17) 2.54-pitch box header
Pin Description Pin Description
1 Ground 2 DRIVE DENSITY SELECT 0
3 Ground 4 DRIVE DENSITY SELECT 1
5 Ground 6 N/C
7 Ground 8 INDEX-
9 Ground 10 MOTOR ENABLE A-
11 Ground 12 DRIVER SELECT B-
13 Ground 14 DRIVER SELECT A-
15 Ground 16 MOTOR ENABLE B-
17 Ground 18 DIRECTION-
19 Ground 20 STEP-
21 Ground 22 WRITE DATA-
23 Ground 24 WRITE GATE-
25 Ground 26 TRACK 0-
27 Ground 28 WRITE PROTECT-
29 Ground 30 READ DATA-
31 Ground 32 HEAD SELECT-
33 Ground 34 DISK CHANGE-
1
33
2
34