HDD and other storage devices connectors pinouts  > obsolete computers pinouts
This interface is nowadays considered obsolete.
Pin Name Dir Description
1GND---Ground
2GND---Ground
3GND---Ground
4GND---Ground
5GND---Ground
6GND---Ground
7GND---Ground
8GND---Ground
9GND---Ground
10GND---Ground
11GND---Ground
12GND---Ground
13GND---Ground
14GND---Ground
15GND---Ground
16GND---Ground
17GND---Ground
18GND---Ground
19TERMPWR<->Termination Power
20/DB0<->Data Bus 0
21/DB1<->Data Bus 1
22/DB2<->Data Bus 2
23/DB3<->Data Bus 3
24/DB4<->Data Bus 4
25/DB5<->Data Bus 5
26/DB6<->Data Bus 6
27/DB7<->Data Bus 7
28/DBP<->Data Bus Parity
29/ATN<--Attention
30/BSY<->Busy
31/ACK<--Acknowledge
32/RST<->Reset
33/MSG-->Message
34/SEL<->Select
35/C/D-->Control/Data
36/REQ-->Request
37/I/O-->Input/Output
37 pin D-SUB female connector layout
37 pin D-SUB female connector
at the controller
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Source(s) of this and additional information: Black Box Corporation, FaxBack document for SCSI, from Hardware Book, Randy Hoffman
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