title: Video mode used by BIOS
body: <p>After writing a 2-stage bootloader and viewing the output :</p>
  
  <p><img src="https://i.stack.imgur.com/jkRF0.png" alt="Output from QEMU"></p>
  
  <p>The first stage's output (produced by using BIOS' <code>int 10h</code> interrupt) has a different white (or is it gray?) than the one obtained by directly accessing video memory in protected mode. </p>
  
  <p>Why is this different ? What video mode does BIOS use ?</p>