INT 7F - Alloy NTNX, MW386 - CHANNEL CONTROL - LOCK ALL OPEN CHANNELS           
	AH = 10h
	CL = 06h
Return: AL = status (00h-03h) (see #03951)
Note:	may not be invoked from within a hardware interrupt handler
SeeAlso: AH=10h/CL=02h,AH=10h/CL=08h