Int 1A Fn FF01  - Snd - Pause                                              [s]

   AX = FF01h
   DX = number of clock ticks to delay

Return: AH = status
       00h successful
       01h SND busy

Notes: if successful, execution returns to the caller after the delay expires;
     if SND is busy, execution returns immediately
   the IC v2.0 implementation of this API makes no special allowance for
     time rollover at midnight, which can cause the delay to be over one
     hour if this function is called just before the BIOS time count
     rolls over and the delay extends into the next day

See Also: AX=FF00h,INT 15/AH=86h,INT 62/AX=0096h,INT 7F/AH=E8h,INT 80/BX=0009h

See Also: INT E0/CL=BDh