INT 15 - IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911. SurePath BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. - ACCESS LOADABLE-ABIOS SIGNATURE 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: IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911. classifies this function as optional SeeAlso: AH=08h"IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911."