Intel Instruction AAD

 AAD                        11010101 00001010

Note: The second byte of this instruction is actually the base that the
      instruction is to work with (normally a 10 for BCD operations). If a
      different base is specified, then the instruction will work in that base.
      For example, with a value of 16 it will work in hex. In fact, the
      instruction could be documented as AAD base, a one byte (vice two)
      instruction with one byte of immediate data. This useage is not reliable
      on some other manufacturers microprocessors for example the NEC V20.