Connector - SCSI Internal (Single-ended)SCSI=Small Computer System Interface. Based on an original design by Shugart Associates. SCSI wasratified in 1986.50 PIN IDC MALE at the controller & harddisk. 50 PIN IDC FEMALE at the cable.  | (at the cable.) |  | (at the controller & harddisk) |
| Pin | Name | Direction | Description |
|---|
| 2 | DB0 | --- | Data Bus 0 | | 4 | DB1 | --- | Data Bus 1 | | 6 | DB2 | --- | Data Bus 2 | | 8 | DB3 | --- | Data Bus 3 | | 10 | DB4 | --- | Data Bus 4 | | 12 | DB5 | --- | Data Bus 5 | | 14 | DB6 | --- | Data Bus 6 | | 16 | DB7 | --- | Data Bus 7 | | 18 | PARITY | --- | Data Parity (odd Parity) | | 20 | GND | --- | Ground | | 22 | GND | --- | Ground | | 24 | GND | --- | Ground | | 26 | TMPWR | --- | Termination Power | | 28 | GND | --- | Ground | | 30 | GND | --- | Ground | | 32 | /ATN | Input | Attention | | 34 | GND | --- | Ground | | 36 | /BSY | --- | Busy | | 38 | /ACK | Input | Acknowledge | | 40 | /RST | --- | Reset | | 42 | /MSG | Output | Message | | 44 | /SEL | --- | Select | | 46 | /C/D | Output | Control/Data | | 48 | /REQ | Output | Request | | 50 | /I/O | Output | Input/Output |
Note: Direction is Device relative Bus (other Devices). All odd-numbered pins, except pin 25, are connected toground. Pin 25 is left open.
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