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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

   ◄Summary►  ◄Detail►  ◄Key to Flags►
──────────────────────────────────────────────────────────────────────────────
 
Check Array Bounds                               Flags:  O D I T S Z A P C
80186/286/386 Only                                       ═════════════════
 
Syntax:  BOUND dest,src
 
  Verifies that a signed index value is within the bounds of an array. The
  destination operand can be any 16-bit register containing the index to
  be checked. The source operand must then be a 32-bit memory operand in
  which the low and high words contain the starting and ending values,
  respectively, of the array.  If the destination operand is less than
  the first bound or greater than the last bound, then an Interrupt 5 is
  generated.  The instruction pointer pushed by the interrupt (and
  returned by IRET) points to the BOUND instruction rather than to the
  next instruction.
                                    -♦-