INT 14 - Connection Manager - RETURN COMMUNICATION PORTIBM PC Portable (uses same BIOS as XT) STATUS
	AH = 03h
	DX = FFFFh
	AL = connection ID
Return: AH = return code (00h-02h) (see #00303)
	BH = line status (see #00306)
	BL = modem status (see #00305) (only bits 4,5,7; all others zero)
Notes:	if DX is 0-3 on entry, Connection Manager emulates the standard BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly.
	  function, but redirects the port over the network; if DX is any other
	  value, the call is chained
SeeAlso: AH=00h/DX=FFFFh,AH=04h/DX=FFFFh,AH=0Ah/DX=FFFFh


Bitfields for Connection Manager line status:
Bit(s)	Description	(Table 00306)
 7	CTS changed
 6	current CTS state
 5	timeout
 4	break
 3	framing error
 2	parity error
 1	overrun
 0	current carrier state (0 active, 1 no carrier)