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     Displacement (disp) bytes give the offset for memory operands. In
     instruction coding, the possible lengths (in bytes) are shown in
     parentheses.
 
     Use a one-byte displacement for a byte offset, such as
 
          MOV ax, [bx+4]
 
     A two-byte displacement is a near pointer. A displacement of zero
     means no offset. Under the .386 and .486 directives, offsets can be
     up to four bytes.
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