INT 10 - Chips & Technologies Extended 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. - SAVE SUPERVGA STATE
	AX = 5F91h
	CX = state mask (see #00185)
	ES:BX -> save buffer
Return: AL = 5Fh if function supported
	    buffer at ES:BX filled
SeeAlso: AH=1Ch,AX=5F03h,AX=5F90h,AX=5F92h,AX=5FA1h