daa.txt

   1
   2 --------------------------------------------------------------------------------
   3 |           | C Flag | HEX value in | H Flag | HEX value in | Number  | C flag |
   4 | Operation | Before | upper digit  | Before | lower digit  | added   | After  |
   5 |           | DAA    | (bit 7-4)    | DAA    | (bit 3-0)    | to byte | DAA    |
   6 |------------------------------------------------------------------------------|
   7 |           |   0    |     0-9      |   0    |     0-9      |   00    |   0    |
   8 |   ADD     |   0    |     0-8      |   0    |     A-F      |   06    |   0    |
   9 |           |   0    |     0-9      |   1    |     0-3      |   06    |   0    |
  10 |   ADC     |   0    |     A-F      |   0    |     0-9      |   60    |   1    |
  11 |           |   0    |     9-F      |   0    |     A-F      |   66    |   1    |
  12 |   INC     |   0    |     A-F      |   1    |     0-3      |   66    |   1    |
  13 |           |   1    |     0-2      |   0    |     0-9      |   60    |   1    |
  14 |           |   1    |     0-2      |   0    |     A-F      |   66    |   1    |
  15 |           |   1    |     0-3      |   1    |     0-3      |   66    |   1    |
  16 |------------------------------------------------------------------------------|
  17 |       SUB |   0    |     0-9      |   0    |     0-9      |   00    |   0    |
  18 |       SBC |   0    |     0-8      |   1    |     6-F      |   FA    |   0    |
  19 |       DEC |   1    |     7-F      |   0    |     0-9      |   A0    |   1    |
  20 |       NEG |   1    |     6-F      |   1    |     6-F      |   9A    |   1    |
  21 |------------------------------------------------------------------------------|
  22
  23 Flags:
  24 C: See instruction.
  25 N: Unaffected.
  26 P/V: Set if Acc. is even parity after operation, reset otherwise.
  27 H: See instruction.
  28 Z: Set if Acc. is Zero after operation, reset otherwise.
  29 S: Set if most significant bit of Acc. is 1 after operation, reset otherwise.