Int 1F Fn 19  U - C&t "superstate" Bios - Enable Auto Wakeup And Set Time  [b]

   AH = 19h
   AL = hour in BCD
   BH = minutes in BCD
   BL = seconds in BCD
   CH = year century in BCD (must be 19h)
   CL = year low in BCD
   DH = month in BCD
   DL = date in BCD

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