INT 61 - Banyan VINES - ASYNC TERMINAL EMULATION - START/STOP TRACING TRAFFIC   
	AX = 0003h subfn 13h
	DS:BX -> argument block (see #03397)
Return: AX = status (see #03369)
SeeAlso: AX=0003h/SF=00h,AX=0003h/SF=0Eh


Format of VINES argument block:
Offset	Size	Description	(Table 03397)
 00h	BYTE	session ID (00h)
 01h	BYTE	13h (function "start/stop tracing data traffic in session")
 02h	BYTE	trace flag (00h=off, 01h=on)