A friend had COMAL on his C-64. It was very impressive. Microware Systems Corporation's BASIC09 from about the same time took the code you entered and converte

A friend had COMAL on his C-64. It was very impressive. Microware Systems Corporation's BASIC09 from about the same time took the code you entered and converted it into "I-code". It's VM code, Jim, but not quite as we know it. The basic09 program didn't do the things we expect from IDEs now, but it did let you modify code etc., so its internal form reflected the BASIC09 statements and control structures rather than having lower-level branch and conditional branch instructions. That let it prettyprint your code with a consistent format when you listed it. (It also let it avoid the insane interpretation and symbol table lookup overhead of Microsoft BASICs of the era, inherited from the days when Altair BASIC had to run on a system with 4K of RAM.)