1 	/ID0 			ID bit 0 to disk drive 
2 	/ID1 			ID bit 1 to disk drive 
3 	/ID2 			ID bit 2 to disk drive 
4 	DISK.+5V 	+5 V to disk drive motor 
5 	DISK.+5V 	+5 V to disk drive motor 
6 	GND 		Ground 
7 	GND 		Ground 
8	/DB0 		SCSI data bit 0 
9	/DB1 		SCSI data bit 1 
10 	/DB2 		SCSI data bit 2 
11 	GND 		Ground 
12 	/DB3 		SCSI data bit 3 
13 	GND 		Ground 
14 	/DB4 		SCSI data bit 4 
15 	GND 		Ground 
16 	/DB5 		SCSI data bit 5 
17 	nc 			No connection 
18 	/DB6 		SCSI data bit 6 
19 	GND 		Ground 
20 	/DB7 		SCSI data bit 7 
21 	GND 		Ground 
22 	/DBP 		SCSI data bit parity 
23 	GND 		Ground 
24 	+5V/0 		+5 V power to disk drive logic 
25 	/ATN 		SCSI attention 
26 	/BSY 		SCSI busy 
27 	GND 		Ground 
28 	/ACK 		SCSI acknowledge 
29 	/RST 		SCSI bus reset 
30 	/MSG 		SCSI message 
31 	GND 		Ground 
32 	/SEL 			SCSI select 
33 	/I/O 			SCSI input/output 
34 	/C/D 			SCSI control or data 
35 	GND 		Ground 
36 	/REQ 		SCSI request 
37 	GND 		Ground 
38 	GND 		Ground 
39 	DISK.+5V 	+5 V power to disk drive motor 
40 	DISK .+5V 	+5 V power to disk drive motor