)
Call driver "send output data to port" function with:
	AH = 04h
	AL = port number (00h-0Fh)
	CX = number of bytes to send
	ES:BX -> buffer containing data
	interrupts disabled
Return: CF clear if successful
	CF set on error
	interrupts disabled
	CX = number of bytes actually written
SeeAlso: #02912,#02914