Category: <b>network</b>
<br>Flags: callout or callback (usually hooked rather than called)<p>
<pre><b>INT 21 - LANtastic - GET DOS SERVICE VECTOR</b>

	AX = 5FE0h
Return: CF clear if successful
	    ES:BX -&gt; current FAR service routine
	CF set on error
	    AX = error code
Note:	the service routine is called by the LANtastic redirector whenever DOS
	  may safely be called, permitting external TSRs and drivers to hook
	  into LANtastic's DOS busy flag checking
SeeAlso: AX=5FE1h,INT 28,INT 2A/AH=84h
</pre>