title: Get string of keys pressed over terminal
body: <p>I'm currently writing up my own ASCII Game Engine in bare metal on the Raspberry Pi 3. </p>
  
  <p>I'd like to create a keyboard interface that will work like my planned NES controller over GPIO. This way I can swap what input I'm using or have multiplayer support.</p>
  
  <p>My question is, is it possible (maybe using VT100 or the like) to query from putty a string of the keys being pressed at any given time? My plan is to pull the state of any button being pressed (ie no interrupts). </p>
  
  <p>How can I ask for or constantly receive the keys being pressed? I'm assuming putty wont send me the keys pressed in this scenario: A + B + Left Arrow.</p>
  
  <p>Thanks :)</p>