Atari Connection Machine
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Other non Atari pinouts

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Atari 400/800/XL/XE SIO

custom 13 Male

Atari Custom 13 pin male at computer side
1 Clock in
2 Clock out
3 Data in
4 GND
5 Data out
6 GND
7 Command
8 Motor control
9 Proceed
10 +5V / Ready
11 Audio in
12 not connected / Atari 400/800 +12V
13 Interrupt

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