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<pre>)
Call NLCACHE/NWCACHE "sideband function" API entry point with:
	BX = function
	    0000h flush request from server
		Return: CF clear if successful at flushing deferred writes
			    AX = 0000h
			CF set on error
			    AX = error code
	    0001h (NWCACHE only) get cache statistics
		ES:DI -&gt; buffer for statistics (see <a href=../../it/22/41.html>#04122</a>)
		Return: CF clear if successful
			AX = 0000h
			ES:DI buffer filled
	    other
		Return: CF set
			AX = 0001h (invalid function)

</pre>
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