Atari 520ST

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Mouse/Joystick
1
—
Up/XB
2
—
Down/XA
3
—
Left/YA
4
—
Right/YB
5
—
Not
Connected
6
—
Fire/Left
Button
7
—
+
5VDC
8
—
Ground
9
—
Joyl
Fire/Right
Button
1
2
3
4 5
6
7
8 9
Joystick
1
—
up
2
—
Down
3
—
Left
4
—
Right
5
—
Reserved
6
—
Fire Button
7
—
+
5VDC
8
—
Ground
9
—
Not
Connected
6
7 8 9