Can be found at Sinclair ZX Spectrum's, I think
 (At the computer)
 (At the computer)
UNKNOWN CONNECTOR at the computer.
| Pin | Name | Description | 
|---|---|---|
| 1 | SOUND C | Sound C (Can be tied together with A & B) | 
| 2 | PORT | ? | 
| 3 | VCC | +5 VDC | 
| 4 | SOUND B | Sound B (Can be tied together with A & C) | 
| 5 | SOUND A | Sound A (Can be tied together with B & C) | 
| 6 | GND | Ground | 
| 7 | PORT | ? | 
| 8 | PORT | ? | 
| 9 | PORT | ? | 
| 10 | PORT | ? | 
| 11 | PORT | ? | 
| 12 | PORT | ? | 
| 13 | PORT | ? | 
| 14 | CLOCK | ? | 
| 15 | CLOCK | ? | 
| 16 | RESET | Reset | 
| 17 | A8 | Address 8? | 
| 18 | BDIR | ? | 
| 19 | BC2 | ? | 
| 20 | BC1 | ? | 
| 21 | D7 | Data 7 | 
| 22 | D6 | Data 6 | 
| 23 | D5 | Data 5 | 
| 24 | D4 | Data 4 | 
| 25 | D3 | Data 3 | 
| 26 | D2 | Data 2 | 
| 27 | D1 | Data 1 | 
| 28 | D0 | Data 0 |