INT 7F - Alloy NTNX - SET FILE I/O CHECKING LEVEL                               
	AH = 26h
	CL = check type to set/reset
	    01h directory protection
	    02h extended open
	    03h flush on every disk write
	    04h flush on disk write if any lock set during write
	    05h flush on all reads if file written
	AL = new state (00h off, 01h on)
SeeAlso: AH=26h/CL=00h,AH=26h/CL=06h