sbIRQ()

         Returns and/or modify the IRQ of the SB

    Syntax:

         sbIRQ( nNewIRQ ) -> nIRQ

         nNewIRQ : The new IRQ that must have the Sound Blaster.
                   Remember that the value must be introduce in decimal,
                   So you have to translate the hexadecimal to decimal.

    Description:

         Returns and/or modify the IRQ of the Sound Blaster. Null the
         Sound Blaster goes to the IRQ 7h, that means that, assume the
         interruption 08h+07h = 0fh but this value can be modify by
         the straps of the card.
         Check in wich IRQ has been your Sound Blaster established
         and adjust this function in the IRQ.

    Return:

         A numerical value indicating the present IRQ

    Example:

         ? sbIRQ( 5 )    // Update the IRQ to 5 and Returns the previous