Category: <b>serial I/O</b>
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<pre><b>INT 14 - PC-MOS/386 v5.01 $serial.sys v5.04 - REGISTER A PORT WITH A TERMINAL</b>

	AH = 13h
	DX = port number
Return: AH = status
	    FFh port number invalid
	    else
		ES:BX -&gt; BYTE flag (00h buffer empty, FFh buffer contains data)
SeeAlso: AH=17h"PC-MOS"
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