title: Time interrupt in C
body: <p>with an ATmega328 I coded a time ago a LED-Matrix.
  To achieve this, I used on the ATmega328 a timer interrupt (ISR), which was called every 10ms, so the Matrix didn't flickered.</p>
  
  <p>Now I asked me, if operating systems (Windows, Linux, MacOSX) can do the same.
  (I would expect it.)</p>
  
  <p>Can somebody give me more infos, I don't find anything in the WWW.
  I'd like to call a function every 1ms (just for learning).</p>