Want to build on Bill Gates? Microsoft open-sourced the original code written by the company founder - now it's over to you

Microsoft open-sourced Bill Gates’ 1976 6502 BASIC interpreter, showcasing early programming features and its historical role in shaping personal computing.
mccormick.northwestern.edu

COMP_ENG 205: Fundamentals of Computer System Software

CATALOG DESCRIPTION: Basics of assembly language programming and instruction set architectures. System stack and procedure calls. Techniques for writing assembly language programs. The course covers ...
Ars Technica

Microsoft open-sources Bill Gates’ 6502 BASIC from 1978

On Wednesday, Microsoft released the complete source code for Microsoft BASIC for 6502 Version 1.1, the 1978 interpreter that powered the Commodore PET, VIC-20, Commodore 64, and Apple II through ...

Microsoft open-sources its 6502 version of BASIC from 1976

Microsoft’s 6502 BASIC ran on the same CPU that powered the Apple II, Commodore 8-bit series, NES, and Atari 2600.