Microsoft Releases Historic 6502 BASIC Code as Open Source

Microsoft has officially released its 6502 BASIC code as open source, marking a significant moment in the history of computing. Originally created in 1976 by Bill Gates and Ric Weiland, this version of BASIC was adapted for the MOS 6502 processor and became a staple of Commodore’s early personal computers, including the PET, VIC-20, and Commodore 64. The release follows years of preservation and reconstruction by retro-computing enthusiasts, such as Michael Steil, who rebuilt the original build environments for modern systems. The open-source release now includes a modern license, offering developers the ability to explore, modify, and share the code. The 6502 BASIC was vital in shaping the early computing landscape and educating millions of new programmers through simple, foundational code. This release also includes historical elements like Bill Gates’ Easter egg hidden in the code, giving enthusiasts a direct connection to a piece of computing history. The move continues Microsoft’s commitment to open-source initiatives, following the release of GW-BASIC and other legacy products.