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."