Microsoft 6502 BASIC Open Source – Retro Programming
- After decades of circulating in unofficial copies, microsoft has officially released the source code for its 6502 BASIC interpreter under an open-source license on GitHub.
- 6502 BASIC was a pivotal early product for Microsoft, originally adapted in 1976 by co-founder Bill Gates and employee Ric Weiland.
- The 6502 CPU powered a generation of iconic machines, including the Apple II, the Atari 2600, the Nintendo Entertainment System, and the Commodore 8-bit computer series.
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Microsoft Open-Sources Original 6502 BASIC Code
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After decades of circulating in unofficial copies, microsoft has officially released the source code for its 6502 BASIC interpreter under an open-source license on GitHub. This marks a important moment for computing history, providing access to a foundational piece of software from the dawn of the personal computer era.
Last updated: September 4, 2024, 10:29:07 AM PDT
Origins of 6502 BASIC
6502 BASIC was a pivotal early product for Microsoft, originally adapted in 1976 by co-founder Bill Gates and employee Ric Weiland. it was designed to run on the MOS Technology 6502 processor,a relatively inexpensive CPU that became the heart of many popular early computers.
The 6502 CPU powered a generation of iconic machines, including the Apple II, the Atari 2600, the Nintendo Entertainment System, and the Commodore 8-bit computer series. This widespread adoption meant 6502 BASIC became a common language for early computer users and hobbyists.
Notably, the version released by Microsoft was the one that shipped in the original IBM PC’s ROM, demonstrating its lasting influence on the computing landscape.
Why This Release Matters
The open-sourcing of 6502 BASIC provides a unique prospect for researchers, historians, and enthusiasts to study a foundational piece of software engineering. It allows for a deeper understanding of the techniques used in early software development and the evolution of programming languages.
Furthermore, it opens the door for potential reimplementation, porting to new platforms, and educational projects. Developers can now examine the code directly, learn from its design, and possibly contribute to its preservation and improvement.
The 6502 CPU: A Brief History
The MOS Technology 6502, released in 1975, was a game-changer in the microcomputer world. Its relatively low cost and high performance made it an attractive option to the more expensive Intel 8080. The 6502’s architecture influenced many subsequent processors and remains a popular choice for retrocomputing projects.
| Processor | release Year | Approximate Cost (1976) | Key Applications |
|---|---|---|---|
| MOS Technology 6502 | 1975 | $25 | Apple II, Atari 2600, Commodore 64 |
| Intel 8080 | 1974 | $360 | Early microcomputers |