Category: <b>serial I/O</b>
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<pre><b>INT 14 - X00 FOSSIL - DESTRUCTIVE READ WITH NO WAIT</b>

	AH = 20h
	DX = port number
Return: AH = 00h if character was available
	    AL = next character (removed from receive buffer)
	AX = FFFFh if no character available
SeeAlso: AH=0Ch,AH=21h"X00"
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