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