On September 3, 2025, Microsoft released version 1.1 of its 6502 Basic as open source. This code formed the basis for Applesoft Basic on the Apple II series as well as Commodore Basic on all of Commodore’s 8-bit computers, including the C-64. It was the same code that Jack Tramiel licensed for a flat $25,000 and then included in more than 15 million computers.
The code could be built into ROM or it could load from tape or disk and execute from RAM. One of the reasons this code proved so influential was because millions of Commodore computers booted straight into it from ROM.









