INT 81 - Gravis UltraSound - MEGA_EM v3.0+ - SOUNDCARD IRQ REDIRECT AX = 2012h ??? Return: ??? Note: MegaEm calls this function from its GUS IRQ handler, and then immediately returns; this permits it to operate while hooking only one interrupt through the memory manager in protected mode SeeAlso: AX=2010h,AX=2011h