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Atari 2600 Cart Slot Pinout

24-pin female 0.1"-spaced dual-sided card edge connector at the console.
  1. A7
  2. A6
  3. A5
  4. A4
  5. A3
  6. A2
  7. A1
  8. A0
  9. D0
  10. D1
  11. D2
  12. GND
  1. D3
  2. D4
  3. D5
  4. D6
  5. D7
  6. Enable
  7. A10
  8. A11
  9. A9
  10. A8
  11. +5VDC Source
  12. GND

Note that the enable line is in reality the A12 line from the CPU. The cart is enabled when this line is high. Just the opposite from normal ROMs and EPROMs that are active when the enable line is low.

Jay Tilton
06/28/98