Int 15 Fn DA14  U - Ami Pci Bios - Get/set ???                             [-]

   AX = DA14h
   CL = subfunction
       00h read
       01h write
       DH = new value for ??? (00h-02h)
   DL = index of ??? (00h-03h, but not range-checked)
   ???

Return: CF clear if successful
       DH = current value of ??? if reading
   CF set on error
       AH = error code (86h unsupported subfunction)

Note:  the values for indexes 00h and 01h are stored in CMOS RAM location 19h,
     and the values for 02h and 03h are stored in location 36h
BUG:   the v1.00.05.AX1 BIOS range-checks DH on subfunction 00h instead of
     subfunction 01h, even though DH is never used by subfunction 00h