INT 31 P - DPMI 0.9+ - SET PROTECTED MODE INTERRUPT VECTOR
        AX = 0205h
        BL = interrupt number
        CX:(E)DX = selector:offset of handler
Return: CF clear if successful
        CF set on error
            AX = error code (DPMI 1.0+) (8022h) (see AX=0000h)
Notes:  16-bit programs use CX:DX, 32-bit programs use CX:EDX
        32-bit programs must use a 32-bit interrupt stack frame when chaining
          to the next handler
        DPMI implementations are required to support all 256 vectors
        hardware interrupts are reflected to the virtual machine's primary
          client, software interrupts to the current client
        not supported by MS Windows 3.0 in Standard mode
SeeAlso: AX=0204h,INT 21/AX=2504h,INT 2F/AX=FB42h/BX=0025h