 (At the Atari)
 (At the Atari)
UNKNOWN CONNECTOR at the Atari.
| Pin | Name | 
|---|---|
| 1 | +5 VDC | 
| 2 | Audio Out (2 port) | 
| 3 | Ground | 
| 4 | R/W Early | 
| 5 | Enable E0-EF | 
| 6 | D6 | 
| 7 | D4 | 
| 8 | D2 | 
| 9 | D0 | 
| 10 | IRQ | 
| 11 | Ground | 
| 12 | Serial Data In | 
| 13 | Serial In Clock | 
| 14 | Serial Out Clock | 
| 15 | Serial Data Out | 
| 16 | Audio In | 
| 17 | A14 | 
| 18 | System Clock 01 | 
| 19 | A11 | 
| 20 | A7 | 
| 21 | A6 | 
| 22 | A5 | 
| 23 | A4 | 
| 24 | A3 | 
| 25 | A2 | 
| 26 | A1 | 
| 27 | A0 | 
| 28 | Ground | 
| 29 | D1 | 
| 30 | D3 | 
| 31 | D5 | 
| 32 | D7 | 
| 33 | Not connected | 
| 34 | Ground | 
| 35 | Not connected | 
| 36 | +5 VDC |