From: joemonk64@gmail.com   
      
   > Not sure what you're talking about.   
   >   
   > This is a once-off instruction to be executed.   
   >   
   Says who? What will stop me from executing it any time I want?   
      
   > There is nothing magical about 4 bit   
   > shifts that are totally memory efficient, zero   
   > fragmentation, but 5 bits would be   
   > totally horrendous, unacceptable to the   
   > whole world without exception.   
   >   
      
   The 8086 has 20 address lines, but is a 16 bit architecture. 20-16 = 4.   
      
   To do a 16-bit shift = you'll need 32 address lines - 16. How much extra   
   circuitry will that require?   
      
   > Personally I want 2 mb of memory   
   > rather than 1 MB, and I'll wear the   
   > slightly inferior fragmentation.   
      
   And how much are you going to pay? They would have to add the extra circuitry   
   to the chip for the extra address lines, produce them, and what will be the   
   production qty?   
      
   Joe   
      
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