From: muta...@gmail.com   
      
   My understanding is that European TVs did a scan from   
   top to bottom 50 times a second, but it was only ever   
   every second row (ie interlaced).   
      
   There were only 25 genuine frames per second.   
      
   And the 50 Hz was a limitation of light decay from   
   phosphor.   
      
   For the goal of "beating the human eye" as far as   
   smooth motion is concerned, I don't know what the   
   number is. 25 may be overkill.   
      
   And my understanding is that with monitors, especially   
   LCD monitors, 50 Hz is not a consideration.   
      
   So.   
      
   If I want to display a cartoon on a monitor, using PDOS,   
   how many frames do I need to draw per second?   
      
   The only timer I have that I'm aware of is 18.2 ticks per second.   
      
   So what I can do is display one frame, and then, if I displayed   
   it quickly enough, I can wait for the next tick to arrive.   
      
   So my question is - is 18 frames per second enough to beat   
   the human eye, at least for cartoons?   
      
   Thanks. Paul.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)