INT 7F - Alloy NTNX, MW386 - CHANNEL CONTROL - CLOSE CHANNEL                    
	AH = 10h
	CL = 01h
	AL = channel number
Return: AL = status (00h-03h,0Ah) (see #03951)
Note:	may not be invoked from within a hardware interrupt handler
SeeAlso: AH=10h/CL=00h,AH=10h/CL=05h