Int 48 Fn 00  - Ti Professional Pc - Speaker Device - Sound Speaker        [b]

   AH = 00h
   AL = number of 25ms ticks sound should last

Return: nothing
Desc:  sound the speaker at the current frequency setting (see AH=02h) for
     the indicated duration

Notes: this function returns immediately; the sound is terminated by the
     timer interrupt handler
   if a new sound is requested while one is already in progress, the
     previous sound is terminated immediately and the new sound takes
     its place

See Also: AH=01h,AH=02h,AH=03h,AH=04h,AH=06h,AH=08h,AH=0Ah,AH=0Bh

See Also: INT 40"TI Professional",INT 49/AH=01h"TI"

See Also: INT 4A/AH=00h"TI",INT 4C"TI Professional",INT 4D/AH=00h