From: joemonk64@gmail.com   
      
   > Yes, even on z/Arch. The only way a 32-bit program can turn into    
   > a 64-bit program (ie, by definition, actually populating 64 bits with    
   > meaningful values, not 0), is via recompilation.    
   >    
      
   You're referring to what is known as an effective address. Thats a different   
   address than an actual memory address. Effective addresses are translated by   
   the system to real addresses. Hence, an attribute of an effective address is   
   that it is a generated    
   address by the system.   
      
   "whenever the machine generates and provides to the program a 24-bit or 31-bit   
   address, the address is made available (placed in storage or loaded into a   
   general register) by being imbedded in a 32-bit field, with the leftmost eight   
   bits or one bit in    
   the field, respectively, set to zeros."   
      
   Joe   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)