INT 10 - ATI Mach64 BIOS - ???

	AX = A013h
	???
Return: AH = status
	    00h successful
	    01h failed
	???
Note:	not implemented in examined Mach64 BIOS, always returns AH=01h; NOP in
	  examined All-in-Wonder 128 BIOS
SeeAlso: AX=A000h,AX=A002h