Category: <b>other operating systems</b>
<br>Flags: obsolete (no longer present in current versions)<p>
<pre><b>INT 21 - DR DOS 5.0-6.0 - DETERMINE DOS TYPE</b>

	AX = 4412h
	CF set
Return: CF set if not DR DOS
	    AX = error code (see <a href=../../it/80/16.html>#01680</a> at AH=59h/BX=0000h)
	CF clear if DR DOS
	    DX = AX = version code (see <a href=../../it/80/15.html>#01580</a>)
Note:	this obsolete call, which is no longer supported in Novell DOS 7, is
	  identical to AX=4452h
SeeAlso: AX=4452h
</pre>