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Appendix A. Connector pin assignments
IDE connectors
1
2
40
39
Figure 20 (Page 2 of 2). ISA connector pin assignments
Pin Signal I/O Pin Signal I/O
B25 IRQ3 I A25 SA6 I/O
B26 DACK2# O A26 SA5 I/O
B27 TC O A27 SA4 I/O
B28 BALE O A28 SA3 I/O
B29 +5 V dc NA A29 SA2 I/O
B30 OSC O A30 SA1 I/O
B31 Ground NA A31 SA0 I/O
D1 MEMCS16# I C1 SBHE# I/O
D2 IOCS16# I C2 LA23 I/O
D3 IRQ10 I C3 LA22 I/O
D4 IRQ11 I C4 LA21 I/O
D5 IRQ12 I C5 LA20 I/O
D6 IRQ15 I C6 LA19 I/O
D7 IRQ14 I C7 LA18 I/O
D8 DACK0# O C8 LA17 I/O
D9 DRQ0 I C9 MEMR# I/O
D10 DACK5# O C10 MEMW# I/O
D11 DRQ5 I C11 SD8 I/O
D12 DACK6# O C12 SD9 I/O
D13 DRQ6 I C13 SD10 I/O
D14 DACK7# O C14 SD11 I/O
D15 DRQ7 I C15 SD12 I/O
D16 +5 V DC NA C16 SD13 I/O
D17 MASTER# I C17 SD14 I/O
D18 Ground NA C18 SD15 I/O
Figure 21 (Page 1 of 2). IDE connector pin assignments
Pin Signal I/O Pin Signal I/O
1 RESET 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 NC 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
30 Technical Information Manual