From: muta...@gmail.com   
      
   On Sunday, July 11, 2021 at 8:31:06 AM UTC+10, muta...@gmail.com wrote:   
      
   > Alex explained a scheme to map out 80286 selectors   
   > so that they covered the 16 MiB. That can be considered   
   > a segment shift too. My calculation is that that would   
   > be a 8-bit segment shift.   
      
   Actually, on both the 80286 and the 80386, the OS should   
   make the effective segment shift for 16-bit applications   
   dependent on the amount of memory installed.   
      
   If you have 4 GiB of memory installed, that is when you   
   should be using 16-bit shifts. Or if there is a shortage   
   of selectors, then that would be a reason to go to   
   16-bit shifts earlier.   
      
   BFN. Paul.   
      
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