jl> {$F+,I+,L+,R-,S-,V-,Q-}   
      
   $F+ - provided by FPC for compatibility with Turbo Pascal. Has no effect on   
   32 and 64-bit compilations   
   $I+ - still used, see freepascal.org/docs-html/prog/progsu38.html   
   $L+ - ignored by FPC   
   $R- - disable range checking, still used   
   $S- - disable stack checking, still used   
   $V- - disable strict string compatibility checking, still used   
   $Q- - disable overflow checking, still used   
      
   See freepascal.org/docs-html/prog/progch1.html for all available compiler   
   directives.    
      
   Seems to me most of these were originally selected to optimize for speed back   
   in the day.   
      
   --- Mystic BBS v1.11 (Windows)   
    * Origin: --[!dreamland BBS dreamland.darktech.org (1:218/530)