Understanding the hardware of printf

Question

I was wondering if there was any resources available online that explains what happens with something, like printf of C, that explains what\'s going on in the very low level

Answer 1

By definition, BIOS and kernel calls are platform-specific. What platform are you interested in? Several links to Linux-related information have already been posted.

Also note that printf may not even result in any BIOS or kernel calls, as your platform may not have a kernel or BIOS present (embedded systems are a good example of this).