SCSI = Small Computer System Interface
50 PIN HI-DENSITY D-SUB FEMALE at
the controller and devices
50 PIN HI-DENSITY D-SUB MALE at the
cable
| Pin | Name | Dir | Description |
|---|---|---|---|
| 1-25 | GND | - | Ground |
| 26 | DB0 | IN/OUT | Data Bus 0 |
| 27 | DB1 | IN/OUT | Data Bus 1 |
| 28 | DB2 | IN/OUT | Data Bus 2 |
| 29 | DB3 | IN/OUT | Data Bus 3 |
| 30 | DB4 | IN/OUT | Data Bus 4 |
| 31 | DB5 | IN/OUT | Data Bus 5 |
| 32 | DB6 | IN/OUT | Data Bus 6 |
| 33 | DB7 | IN/OUT | Data Bus 7 |
| 34 | PARITY | IN/OUT | Data Parity (odd Parity) |
| 35 | GND | - | Ground |
| 36 | GND | - | Ground |
| 37 | GND | - | Ground |
| 38 | TMPWR | IN/OUT | Termination Power |
| 39 | GND | - | Ground |
| 40 | GND | - | Ground |
| 41 | /ATN | IN | Attention |
| 42 | n/c | - | Not connected |
| 43 | /BSY | IN/OUT | Busy |
| 44 | /ACK | IN | Acknowledge |
| 45 | /RST | IN/OUT | Reset |
| 46 | /MSG | OUT | Message |
| 47 | /SEL | IN/OUT | Select |
| 48 | /C/D | OUT | Control/Data |
| 49 | /REQ | OUT | Request |
| 50 | /I/O | OUT | Input/Output |
Notes
- Direction is Device relative Bus (other Devices).
- For more informations, references and sources go to SCSI Technology