INT 7F - Alloy NTNX, MW386 - CHANNEL CONTROL - OPEN CHANNEL                     
	AH = 10h
	CL = 00h
	AL = channel number
	DX:DI -> channel buffer
Return: AL = status (00h-03h,0Dh) (see #03951)
Note:	may not be invoked from within a hardware interrupt handler
SeeAlso: AH=10h/CL=01h,AH=10h/CL=04h,AH=14h/CL=02h


(Table 03951)
Values for Alloy function status:
 00h	successful
 01h	busy
 02h	channel range error (not 00h-3Fh)
 03h	invalid subfunction
 0Ah	channel not open
 0Ch	channel already locked
 0Dh	unable to open