Appendix A. Connector-pin assignments 33
IDE connectors
6 Data rate 0 23 Ground
7 Ground 24 Write enable# O
8 Index# 25 Ground
9 Reserved 26 Track0# I
10 Motor enable 0# O 27 Ground
11 Ground 28 Write protect# I
12 Drive select 1# O 29 Ground I
13 Ground 30 Read data# I
14 Drive select 0# O 31 Ground
15 Ground 32 Head 1 select# O
16 Motor enable 1# O 33 Ground O
17 N/C I 34 Diskette change# I
Table 18. Diskette drive connector-pin assignments
Pin Signal I/O Pin Signal I/O
Table 19. IDE connector-pin assignments
Pin Signal I/O Pin Signal I/O
1 N/C O 21 SDDREQ
2 Ground 22 Ground
3 Data bus bit 7 I/O 23 I/O write O
4 Data bus bit 8 I/O 24 Ground
5 Data bus bit 6 I/O 25 I/O read O
6 Data bus bit 9 I/O 26 Ground
7 Data bus bit 5 I/O 27 I/O channel ready I
8 Data bus bit 10 I/O 28 Ground O
9 Data bus bit 4 I/O 29 DMAACK
10 Data bus bit 11 I/O 30 Ground
11 Data bus bit 3 I/O 31 IRQ I
12 Data bus bit 12 I/O 32 CS16# I
13 Data bus bit 2 I/O 33 SA1 O
14 Data bus bit 13 I/O 34 IDE66 detect I
1
2
40
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