Category: <b>file/disk compression</b>
<p>
<pre><b>INT 21 - DIET v1.43e - READ EMS STATUS</b>

	AX = 37DEh
	BX = 899Dh ('DI' + 'ET')
Return: AX = 0000h
	CX = EMS status
	    0000h not used
	    0001h used as work area
	    0002h used for code and as work area
	DX = EMM handle when EMS is in use
</pre>