Piedinature - Pinouts
SCSI External D-Sub (PC/Amiga/Mac)

Reference and Sources:

25 PIN D-SUB FEMALE (At the controller)

25 PIN D-SUB MALE (At the cable)

25 PIN D-SUB FEMALE at the controller.
25 PIN D-SUB MALE at the cable.

Pin	Name	Dir	Description
1	/REQ	OUT	Request
2	/MSG	OUT	Message
3	I/O	OUT	Input/Output
4	/RST	IN/OUT	Reset
5	/ACK	IN	Acknowledge
6	BSY	IN/OUT	Busy
7	GND	------	Ground
8	DB0	IN/OUT	Data Bus 0
9	GND	------	Ground
10	DB3	IN/OUT	Data Bus 3
11	DB5	IN/OUT	Data Bus 5
12	DB6	IN/OUT	Data Bus 6
13	DB7	IN/OUT	Data Bus 7
14	GND	------	Ground
15	C/D	OUT	Control/Data
16	GND	------	Ground
17	/ATN	IN	Attention
18	GND	------	Ground
19	/SEL	IN/OUT	Select
20	PARITY	IN/OUT	Data Parity
21	DB1	IN/OUT	Data Bus 1
22	DB2	IN/OUT	Data Bus 2
23	DB4	IN/OUT	Data Bus 4
24	GND	------	Ground
25	TMPWR	IN/OUT	Termination Power

Note: Direction is Device relative Bus (other Devices).

For more informations, references and sources go to

Piedinature - PinoutsSCSI External D-Sub (PC/Amiga/Mac)