GUI64 Adds a Graphical Interface to the Commodore 64's Built-In ROM

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GUI64 is a graphical user interface designed for the Commodore 64 that runs on top of the machine's built-in ROM. The project is documented on the C64 Wiki, which serves as the primary reference for its details. The item drew modest attention on Hacker News, where it received 4 points and no comments at the time it was listed. Further specifics about the interface's features and development are available through the linked wiki page.

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