Int 15 Fn A0  - Ibm Surepath Bios - Access Loadable-abios Signature        [B]

   AH = A0h
   AL = function
       00h get loadable-ABIOS signature

       Return: BL = signature value
               00h loadable-ABIOS prompting not required
               A1h loadable-ABIOS prompting is required
       01h write loadable-ABIOS signature
       BL = new signature value
           00h loadable-ABIOS prompting not required
           A1h loadable-ABIOS prompting is required

Return: CF clear if successful
   CF set on error
   AH = status
       00h successful
       01h invalid subfunction
       02h unable to read/write signature
       86h function not supported

Note:  IBM classifies this function as optional

See Also: AH=08h"IBM"