Category: <b>non-traditional input devices</b>
<p>
<pre><b>INT 66 - PenDOS - PKEYUS - ???</b>

	AH = 43h
	BX = ???
	DX = ???
Return: AX = status
	    0000h if AH=41h flag set
	    else
		AH = ???
		AL = ???
		BX = ???
		DX = ???
SeeAlso: AH=41h
</pre>