Category: <b>resident utilities</b>
<br>Flags: callout or callback (usually hooked rather than called)<p>
<pre><b>INT 2F - NLSFUNC.COM - INSTALLATION CHECK</b>

	AX = 1400h
	BX &lt;&gt; 0EDCh
Return: AL = status
	    00h not installed, OK to install
	    01h not installed, not OK to install
	    FFh installed
Notes:	this function is called by the DOS v3.3+ kernel
	supported by OS/2 v1.3+ compatibility box, which always returns AL=FFh
	supported by DR DOS 5.0+ NLSFUNC v3.0+
	documented for MS-DOS 5+, but undocumented in prior versions
	DR DOS 5.0+ NLSFUNC 3.00+ returns CF set and AX=0001h, if AL was not
	  00h, FEh, or FFh on entry.
SeeAlso: AX=1400h/BX=0EDCh,AX=1401h"NLSFUNC",AX=1402h"NLSFUNC"
</pre>