Int D4 Fn 1B  - Pc-mos/386 V5.01 - Get/set Time Slice                      [O]

   AH = 1Bh
   AL = subfunction (00h read, 01h set, 02h get and set)
   BX = task ID (FFFFh for current task) (see AH=19h)
   CL = new time slice value

Return: CF clear if successful
       CL = current time slice value
   CF set on error
       AX = error code (see #1366 at INT 21/AH=59h/BX=0000h)

See Also: AH=1Ah,AH=1Ch