qa.hlp (Table of Contents; Topic list)
Important Notice
The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.
AAD
   Summary  Detail  Key to Flags
──────────────────────────────────────────────────────────────────────────────
 
ASCII Adjust Before Division                     Flags:  O D I T S Z A P C
                                                         ═════════════════
Syntax:  AAD                                             ?       ± ± ? ± ?
 
  Converts unpacked BCD digits in AH (most significant digit) and
  AL (least significant digit) to a binary number in AX. The
  instruction is often used to prepare an unpacked BCD number in AX
  for division by an unpacked BCD digit in an 8-bit register.
                                    -♦-