| Pin (25 pin) | Pin (36 pin) | Signal name | Direct. | Register bit |
|---|---|---|---|---|
| 1 | 1 | Strobe | In/Out | Control-0 |
| 2 | 2 | Data0 | Out | Data-0 |
| 3 | 3 | Data1 | Out | Data-1 |
| 4 | 4 | Data2 | Out | Data-2 |
| 5 | 5 | Data3 | Out | Data-3 |
| 6 | 6 | Data4 | Out | Data-4 |
| 7 | 7 | Data5 | Out | Data-5 |
| 8 | 8 | Data6 | Out | Data-6 |
| 9 | 9 | Data7 | Out | Data-7 |
| 10 | 10 | Ack | In | Status-6 |
| 11 | 11 | Busy | In | Status-7 |
| 12 | 12 | Paper-Out | In | Status-5 |
| 13 | 13 | Select | In | Status-4 |
| 14 | 14 | Linefeed | In/Out | Control-1 |
| 15 | 32 | Error | In | Status-3 |
| 16 | 31 | Reset | In/Out | Control-2 |
| 17 | 36 | Select-Printer | In/Out | Control-3 |
| - | 18,35 | +5V | - | - |
| - | 15,34 | n.c. | - | - |
| 18-25 | 16,17, 19-30, 33 | Ground | - | - |