Category: <b>sound/speech</b>
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<pre><b>INT 1A - Tandy 2500, Tandy 1000L series - DIGITAL SOUND - INSTALLATION CHECK</b>

	AX = 8100h
Return: AL &gt; 80h if supported
	AX = 00C4h if supported (1000SL/TL)
	    CF set if sound chip is busy
	    CF clear  if sound chip is free
Note:	the value of CF is not definitive; call this function until CF is
	  clear on return, then call AH=84h"Tandy"
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