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9 pin D-SUB male connector layout
9 pin D-SUB male connector
at the computer
Pin Mouse/Trackball Lightpen Digital Joystick Paddle Dir Comment
1V-pulsen/c/FORWARDBUTTON 3<-- 
2H-pulsen/c/BACKn/c<-- 
3VQ-pulsen/c/LEFTBUTTON 1<-- 
4HQ-pulsen/c/RIGHTBUTTON 2<-- 
5BUTTON 3(M)Penpressn/cPotX<-> 
6BUTTON 1(L)/Beamtrigger/BUTTON 1n/c<-> 
7+5V+5V+5V+5V-->50 mA max
8GNDGNDGNDGND--- 
9BUTTON 2(R)BUTTON 2BUTTON 2PotY<-> 
9 pin D-SUB female connector layout
9 pin D-SUB female connector
at the mouse/joy cable
According to 6 reports in our database (6 positive and 0 negative) this pinout should be correct.

Is this pinout
Source(s) of this and additional information: Commodore 4000 User"s Guide from Commodore, from Hardware Book
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