Category: <b>serial I/O</b>
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<pre><b>INT 14 - HUNTER 16 - EXTENDED CONTROL</b>

	AH = 21h
	AL = command
	    01h force transmission of buffer
	    02h clear transmit buffer
	    03h clear receive buffer
	DX = port (00h COM1, 01h COM2)
Return: AH = extended status
Desc:	executes the command on the selected port
SeeAlso: AH=1Eh"HUNTER",AH=20h"HUNTER",AH=22h"HUNTER",AH=24h"HUNTER"
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