| Pin | Name | Direction | Description |
|---|
| 1 | /STROBE | Input | Strobe |
| 2 | D0 | --- | Data Bit 0 |
| 3 | D1 | --- | Data Bit 1 |
| 4 | D2 | --- | Data Bit 2 |
| 5 | D3 | --- | Data Bit 3 |
| 6 | D4 | --- | Data Bit 4 |
| 7 | D5 | --- | Data Bit 5 |
| 8 | D6 | --- | Data Bit 6 |
| 9 | D7 | --- | Data Bit 7 |
| 10 | /ACK | Output | Acknowledge |
| 11 | BUSY | Output | Busy |
| 12 | POUT | Output | Paper Out |
| 13 | SEL | Output | Select |
| 14 | /AUTOFEED | Input | Autofeed |
| 15 | n/c | --- | Not used |
| 16 | 0 V | --- | Logic Ground |
| 17 | CHASSIS GND | --- | Shield Ground |
| 18 | +5 V PULLUP | Output | +5 V DC (50 mA max) |
| 19 | GND | --- | Signal Ground (Strobe Ground) |
| 20 | GND | --- | Signal Ground (Data 0 Ground) |
| 21 | GND | --- | Signal Ground (Data 1 Ground) |
| 22 | GND | --- | Signal Ground (Data 2 Ground) |
| 23 | GND | --- | Signal Ground (Data 3 Ground) |
| 24 | GND | --- | Signal Ground (Data 4 Ground) |
| 25 | GND | --- | Signal Ground (Data 5 Ground) |
| 26 | GND | --- | Signal Ground (Data 6 Ground) |
| 27 | GND | --- | Signal Ground (Data 7 Ground) |
| 28 | GND | --- | Signal Ground (Acknowledge Ground) |
| 29 | GND | --- | Signal Ground (Busy Ground) |
| 30 | /GNDRESET | --- | Reset Ground |
| 31 | /RESET | Input | Reset |
| 32 | /FAULT | Output | Fault (Low when offline) |
| 33 | 0 V | --- | Signal Ground |
| 34 | n/c | --- | Not used |
| 35 | +5 V | Output | +5 V DC |
| 36 | /SLCT IN | Input | Select In (Taking low or high sets printer on line or off line respectively) |
