title: x86 where stack pointer points?
body: <p>For example if I pushed ax is [SP] points to my value of ax or the word after ax? Also is it differs from real mode to protected mode? I ask this because the Art of assembly book illustrates and explains as the sp points to last pushed data, and on this page <a href="http://wiki.osdev.org/Stack" rel="noreferrer">OSDev Wiki - Stack</a> it illustrated as it points to empty word after last pushed data.</p>