IBM 6275 - PC 300 GL, Technical Information Manual

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Appendix A. Connector Pin Assignments
IDE Connectors
1
2 40
39
Note: The IDE connectors are on the riser card.
Diskette Drive Connector
Note: The diskette drive connector is on the riser card.
Figure 33. IDE Connector Pin Assignments
Pin Signal I/O Pin Signal I/O
1 NC O 21 NC NA
2 Ground NA 22 Ground NA
3 Data bus bit 7 I/O 23 I/O write O
4 Data bus bit 8 I/O 24 Ground NA
5 Data bus bit 6 I/O 25 I/O read O
6 Data bus bit 9 I/O 26 Ground NA
7 Data bus bit 5 I/O 27 I/O channel ready I
8 Data bus bit 10 I/O 28 ALE O
9 Data bus bit 4 I/O 29 NC NA
10 Data bus bit 11 I/O 30 Ground NA
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 PDIAG# I
15 Data bus bit 1 I/O 35 SA0 O
16 Data bus bit 14 I/O 36 SA2 O
17 Data bus bit 0 I/O 37 CS0# O
18 Data bus bit 15 I/O 38 CS1 O
19 Ground NA 39 Active# I
20 Key (Reserved) NA 40 Ground NA
Figure 34 (Page 1 of 2). Diskette Drive Connector Pin Assignments
Pin Signal I/O Pin Signal I/O
1 Drive 2 installed # I 2 High density select O
3 Not connected NA 4 Not connected NA
5 Ground NA 6 Data rate 0 NA
7 Ground NA 8 Index# I
9 Reserved NA 10 Motor enable 0# O
11 Ground NA 12 Drive select 1# O
13 Ground NA 14 Drive select 0# O
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Technical Information Manual