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Appendix A. Connector pin assignments 43
Diskette drive connector
Table 24. Diskette drive connector pin assignments
Pin Signal I/O Pin Signal I/O
1 Drive 2 installed # I 18 Direction in# O
2 High density
select
O19GroundN/A
3 Not connected N/A 20 Step# O
4 Not connected N/A 21 Ground N/A
5 Ground N/A 22 Write data # O
6 Data rate 0 N/A 23 Ground N/A
7 Ground N/A 24 Write enable# O
8 Index# I 25 Ground N/A
9 Reserved N/A 26 Track0# I
10 Motor enable 0# O 27 MSEN0 I
11 Ground N/A 28 Write protect# I
12 Drive select 1# O 29 Ground N/A
13 Ground N/A 30 Read data# I
14 Drive select 0# O 31 Ground N/A
15 Ground N/A 32 Head 1 select# O
16 Motor enable 1# O 33 Data rate 1 N/A
17 MSEN1 I 34 Diskette change# I
1
2
34
33