NOP              No Operation                        Flags: not altered
 
          Logic:    None
 
    NOP causes the processor to do nothing. This instruction is frequently
    used for timing purposes, to force memory alignment, and as a "place-
    holder."
 
  --------------------------------------------------------------------------
   Operands                  Clocks   Transfers  Bytes   Example
   no operands                 3          -        1     NOP
  --------------------------------------------------------------------------