From: muta...@gmail.com   
      
   On Tuesday, July 13, 2021 at 1:39:35 PM UTC+10, wolfgang kern wrote:   
      
   > >> but it become a five byte   
   > >> opcode in PM32:   
   > >> bb 44 33 22 11 MOV ebx.imm32   
   > >> or a four byte:   
   > >> 66 bb 44 33 MOV bx.imm16   
   >   
   > > This 4 byte one looks like it will work on both PM32   
   > > and RM16.   
   > >   
   > > That's exactly what I'm after.   
   >   
   > > It will all work, right?   
      
   > No, the 66 override reverses the default operand size.   
   > so it makes 16 bit within PM32 and 32 bit within PM16/RM.   
      
   No. On a real 8086. The x'66' will be ignored. So a real   
   8086 and PM32 will both work, right?   
      
   BFN. Paul.   
      
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