IBM PC 300PL manual IDE connectors, IDE connector pin assignments

Appendix

A. Connector

pin

assignments

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

IDE connectors

2

40

1

39

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