Int 1F Fn F5  U - C&t "superstate" Bios - Set Password                     [b]

   AH = F5h
   BL = FEh
   CX:SI -> input string
   BH = length of input string (if BH = 00h, clear password)

Return: CF set on error

Note:  the input string must be encrypted by INT 1Fh/AH=F5h/BL=FDh

See Also: AH=F5h/BL=FDh,AH=F5h/BL=FFh