AAA              ASCII Adjust after Addition         Flags: O D I T S Z A P C
                                                            ?       ? ? * ? *
AAA
 
          Logic:    If (AL & 0Fh) > 9 or (AF = 1) then
                        AL  AL + 6
                        AH  AH + 1
                        AF  1;  CF  1
                    else
                        AF  0;  CF  0
                    AL  AL & 0Fh
 
    Converts the number in the lower 4 bits (nibble) of AL to an unpacked
    BCD number (high-order nibble of AL is zeroed).
 
  --------------------------------------------------------------------------
   Operands                  Clocks   Transfers  Bytes   Example
   no operands                 4          -        1     AAA
  --------------------------------------------------------------------------
 
    If the lower 4 bits of the number in AL is greater than 9, or the
    auxiliary carry flag is set, this instruction converts AL to its
    unpacked BCD form by adding 6 (subtracting 10) to AL; adding 1 to AH;
    and setting the auxiliary flag and carry flags. This instruction will
    always leave 0 in the upper nibble of AL.
 
       Note:          Unpacked BCD stores one digit per byte; AH contains
                      the most-significant digit and AL the least-
                      significant digit.

Seealso:


 AAD 
 AAS 
 AAM 
 ADC 
 DAA 
 Flags