INT 48 - TI Professional PCIBM PC - SPEAKER DEVICE - CHECK SPEAKER STATUS AH = 01h Return: ZF clear if speaker is currently on ZF set if speaker is currently off SeeAlso: AH=00h,AH=02h,AH=03h,AH=04h,AH=06h,AH=08h,AH=0Ah,AH=0Bh