Microsoft has released the source code for its 6502-based BASIC interpreter—BASIC for 6502 Microprocessor Version 1.1—under the MIT licence, inviting developers, historians and retro-enthusiasts to ...

In 1977, Commodore licensed BASIC for $25,000 as a one-time payment, securing perpetual use without royalties.

Microsoft has open-sourced the 6502 BASIC programming language interpreter from 1976. Its source code is now available on ...