INT 31H 0203H: Set Processor Exception Handler Vector

                                                    Compatibility: DPMI 0.9+ 
 Expects: AX    0203H
          BL    exception number (00h-ffH)
          CX:DX (or CX:EDX) selector:offset of exception handler
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 Returns: CF    NC (clear) if successful; else AX = DPMI Error Code
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    Info: Sets the vector for the code to be executed during a CPU
          exception.

    Note: When using a DPMI 1.0 host, use INT 31H 0212H and INT 31H 0213H
          rather than this 0.9-spec fn.

See Also: DPMI API
          INT 2fH: Multiplex Interrupt
          DOS Functions
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