Compatibility: DPMI 0.9+
Expects: AX    0202H
BL    exception number (00h-ffH)
                                                                  
Returns: CF    NC (clear) if successful; else AX = DPMI Error Code
CX:DX (or CX:EDX) selector:offset of exception handler
                                                                  
Info: Obtains the protect-mode address of a CPU exception handler.

Note: When using a DPMI 1.0 host, use INT 31H 0210H and INT 31H 0211H
rather than this 0.9-spec fn.

See Also: DPMI API
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INT 31H 0202H: Query Processor Exception Handler Vector