Category: <b>resident utilities</b>
<br>Flags: Undocumented function<p>
<pre><b>INT 16 - PC Tools v6.0+ PCRUN API - INSTALLATION CHECK</b>

	AX = FFDDh
	BX = 000Ah
Return: CX = 5555h if running
	DX = 5555h
Note:	also sets a flag
</pre>