From: mutazilah@gmail.com   
      
   On Saturday, March 13, 2021 at 8:56:34 AM UTC+8, muta...@gmail.com wrote:   
      
   > Is it possible to write x64 code that doesn't    
   > disturb the top 32 bits of registers? As far    
   > as possible I would like to stick to using    
   > pure 80386 instructions and registers.    
   >    
   > I'm only interested in application code, e.g.    
   > printf("hello, world\n");    
   >    
   > Then we could run 32-bit executables on a    
   > 64-bit OS without needing to switch modes.    
   > A different executable, sure, but that's not    
   > my fault. That's the fault of the 80386 and    
   > x64 designers who apparently didn't think    
   > ahead.   
      
   I have this working now as proof of concept.   
      
   See the bottom of "University Challenge x64" at http://pdos.org   
      
   Note that this is running (some) Win32 executables in LM64   
   under UEFI still in boot services.   
      
   This is NOT running 16-bit executables.   
      
   BFN. Paul.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)