SCSI External D-Sub (PC/Amiga/Apple Macintosh)

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

Note: Direction is Device relative Bus (other Devices). Total length of all SCSI cables should not exceed 20 feet (6 meters).