| Pin | Signal | Description |
| 1 | SD7 | Data Bit 7 |
| 2 | SD0 | Data Bit 0 |
| 3 | SD6 | Data Bit 6 |
| 4 | SD1 | Data Bit 1 |
| 5 | SD5 | Data Bit 5 |
| 6 | SD2 | Data Bit 2 |
| 7 | SD4 | Data Bit 4 |
| 8 | SD3 | Data Bit 3 |
| 9 | GND | 0 Volts |
| 10 | SCK | Undefined Control Line |
| 11 | SVB | External Power Input / Battery Output Voltage - 0.6 Volt |
| 12 | SS3 | Slot Select 3 |
| 13 | SCVV | +5 Volts |
| 14 | AC | External On/Clear |
| 15 | SOME | Undefined Control Line |
| 16 | SMR | Undefined Control Line |

