| Pin |
Name |
Dir |
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 |
 |
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 |
 |
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 |
|
When active (low) indicates an attention condition |
| 26 |
/C/D |
|
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 |
|
Indicates the message phase |
| 29 |
/SEL |
|
SCSI select |
| 30 |
/I/O |
|
Controls the direction of data output. When high, data is input |