C64 joystick adapter schematics
The Wikipedia-page Commodore 64 joystick adapters
links externally to building instructions for the adapters.
Building instructions for the most common joystick adapters are located at pages of
Protovision
and
Hitmen.
Building instructions for a few less common adapters are made available on this page.
You may reach me at c64 at synnes dot org .
Kingsoft adapter (1992)
Building instructions were included in the Kingsoft game Bug Bomber (1992). Thanks to Andrew Fisher, author of The Commodore 64 Book, for the scan!
Open the image for full size view.
Luigi Pantarottos adapter (1998)
Building instructions appears in the start screen of Luigi Pantarotto's game SpaceBalls (1998).
My screenshot follows below.
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