| Pin | Name | Direction | Description |
|---|
| 1 | n/c | --- | Reserved for SCSI disk mode. |
| 2 | /DB0 | --- | Bit 0 of SCSI data bus |
| 3 | GND | --- | Ground |
| 4 | /DB1 | --- | Bit 1 of SCSI data bus |
| 5 | TPWR | --- | Termination power |
| 6 | /DB2 | --- | Bit 2 of SCSI data bus |
| 7 | /DB3 | --- | Bit 3 of SCSI data bus |
| 8 | GND | --- | Ground |
| 9 | /ACKS | Input | Handshake signal. When low acknowledges a request for data transfer |
| 10 | GND | --- | Ground |
| 11 | /DB4 | --- | Bit 4 of SCSI data bus |
| 12 | GND | --- | Ground |
| 13 | GND | --- | Ground |
| 14 | /DB5 | --- | Bit 5 of SCSI data bus |
| 15 | GND | --- | Ground |
| 16 | /DB6 | --- | Bit 6 of SCSI data bus |
| 17 | GND | --- | Ground |
| 18 | /DB7 | --- | Bit 7 of SCSI data bus |
| 19 | /DBP | --- | SCSI data bus parity bit |
| 20 | GND | --- | Ground |
| 21 | /REQ | Output | Request for a data transfer |
| 22 | GND | --- | Ground |
| 23 | /BSY | --- | When active (low) indicates that the SCSI data bus is busy |
| 24 | GND | --- | Ground |
| 25 | /ATN | Input | When active (low) indicates an attention condition |
| 26 | /C/D | Output | When active (low) indicates that data is on the SCSI bus. When high, indicates that control signals are on the bus |
| 27 | /RST | --- | SCSI bus reset |
| 28 | /MSG | Output | Indicates the message phase |
| 29 | /SEL | --- | SCSI select |
| 30 | /I/O | Output | Controls the direction of data output. When high, data is input |
