Int 15 Fn DA19  U - Ami Pci Bios - Get/set ???                             [-]

   AX = DA19h
   CL = subfunction
       00h get first ???
       01h get second ???
       02h set first ???
       BX = ???
       DX = ???
       03h set second ???
       BX = ???
       DX = ???

Return: CF clear if successful
       AX = 0000h
       BX,DX = ??? (subfunctions 00h and 01h only)
   CF set on error
       AH = error code (86h unsupported subfunction)

Note:  the first ??? is stored in CMOS RAM locations 1Bh-1Eh, the second in
     locations 1Fh-22h in the v1.00.05.AX1 BIOS