Category: <b>other operating systems</b>
<p>
<pre><b>INT 2F - FreeDOS - FDAK-DDT - SWITCH BLOCK DEVICE TO READ-ONLY</b>

	AX = 12FFh
	BL = 03h
	???
SeeAlso: AX=12FFh/BL=00h,AX=12FFh/BL=04h
</pre>