Category: <b>serial I/O</b>
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<pre><b>INT 14 - Digiboard - CCB COMMAND - SET HANDSHAKE</b>

	AX = 164Bh
	BL = bits to set
	BH = bits to clear
	CL = byte 1
	DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AH = status
	    00h successful
	    80h error
	    FFh error
SeeAlso: AH=16h"Digiboard",AX=1649h,AX=164Ch
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