Reliving Smalltalk-76: Running the Legend on a Xerox Alto

This blog post details the author's success in running Smalltalk-76 on a vintage Xerox Alto. Smalltalk, a pioneering object-oriented programming language, featured a groundbreaking GUI on the Alto, including the desktop metaphor, icons, scrollbars, and overlapping windows—influencing the design of the Apple Lisa and Macintosh. The article highlights Smalltalk's unique ability to view and modify system code while the system is running, demonstrated by modifying scrollbar code. Despite its slow speed, Smalltalk's implementation on the Alto holds significant historical and technical value, laying the groundwork for modern programming languages and GUI design.