Int 48 Fn 03  - Ti Professional Pc - Speaker Device - Turn On Speaker      [b]

   AH = 03h

Return: nothing
Desc:  turn on the speaker at the current frequency, leaving it on until
     explicitly turned off with AH=04h or the end of a subsequent
     AH=00h

See Also: AH=00h,AH=01h,AH=02h,AH=04h,AH=06h,AH=08h,AH=0Ah,AH=0Bh