Lexmark 4I3 - Manual (Page 300)

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IBM Parallel Attachment (Models 4I3 and 5I3)
| The 4230 supports the IBM Parallel Printer Interface. A single 36-pin
| connector is mounted on the adapter card.
| The PC-parallel interface attaches to the host with a standard PC
| Parallel Printer cable (IBM part 1525612) up to 1.8 m (6 ft) in length.
| IBM Parallel Connector Pin Assignments
| Pin
| Number
| Signal Name | Description
| 1 | -STROBE | Strobe
| 2 - 9 | DATA | Eight Data Lines
| 10 | -ACKNLG | Acknowledge
| 11 | BUSY | Busy
| 12 | PE | Out of Paper
| 13 | SLCT | Printer Selected
| 14 | Unused |
| 15 | Unused |
| 16 | LOGIC GND | Logic Ground
| 17 | CHASSIS GROUND | Chassis Ground
| 18 | Unused |
| 19 - 30 | GROUND | Ground
| 31 | -INIT | Initialize Printer
| 32 | -ERROR | Printer Error
| 33 | GROUND | Ground
| 34, 35 | Unused |
| 36 | Unused |
E-6 User’s Guide