Sub-D connector: front-view
Centronics connector: front-view
| Sub-D | Centr. | Name | In/Out |
| 2 | 2 | Data0 | Out |
| 3 | 3 | Data1 | Out |
| 4 | 4 | Data2 | Out |
| 5 | 5 | Data3 | Out |
| 6 | 6 | Data4 | Out |
| 7 | 7 | Data5 | Out |
| 8 | 8 | Data6 | Out |
| 9 | 9 | Data7 | Out |
| 10 | 10 | /Ackn | In |
| 11 | 11 | Busy | In |
| 12 | 12 | Paper empty | In |
| 13 | 13 | Select | In |
| 15 | 32 | /Error | In |
| 1 | 1 | /Stobe | Out |
| 14 | 14 | /Autofeed | Out |
| 17 | 36 | /SelectIn | Out |
| 16 | 31 | /Init | Out |
| 18-25 | 15-30 | GND | - |