This combination of C and assembly code requires special tools and methodologies in the tool box of every DSP engineer. It is well known that assembly coding has the advantage of better performance, ...

It steps through installing git, Java, Kick Assembler, and Visual Studio Code. Beyond that, it even explains how to use these tools in partnership with VICE – the Versatile Commodore Emulator.

That means you don’t need to write your entire application in Assembly. You can simply use it to streamline hairy parts of your code, then include those Assembly files at compile time.