Compatibility: DPMI 0.9+
Expects: AX    0200H
BL    interrupt number
                                                                  
Returns: CF    NC (clear) if successful; else AX = DPMI Error Code
CX:DX segment:offset of requested vector
                                                                  
Info: Obtains the address of a real-mode interrupt handler.  The value
return in CX is a real-mode segment address (not a selector).

See Also: DPMI API
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INT 31H 0200H: Query Real-mode Interrupt Vector