As I recall, Borland's printf() was C code with the occasional pieces of inline assembly language; and this was the case for most of the C runtime library. The

As I recall, Borland's printf() was C code with the occasional pieces of inline assembly language; and this was the case for most of the C runtime library. There were occasional pieces actually implemented as fully fledged assembly language modules, but this was far from "all" of the runtime library.