Format of SPX status buffer:
Offset	Size	Description	)
 00h	BYTE	connection state
		01h waiting to establish connection
		02h starting (attempting to create connection)
		03h connection established
		04h terminating
 01h	BYTE	watchdog flag
		bit 0: used internally by SPX
		bit 1: SPX watchdog is monitoring connection
		bits 2-7 used internally by SPX
 02h	WORD	(big-endian) source connection ID
 04h	WORD	(big-endian) destination connection ID
 06h	WORD	(big-endian) sequence number of next packet sent
 08h	WORD	(big-endian) acknowledge number, expected sequence number of
		  next received packet
 0Ah	WORD	(big-endian) maximum sequence number remote SPX may send
		  without ACK from local SPX
 0Ch	WORD	(big-endian) remote acknowledge number, next sequence number
		  remote SPX expects to receive
 0Eh	WORD	(big-endian) remote allocation number, maximum sequence number
		  local SPX may send
 10h	WORD	(big-endian) connection socket
 12h  6 BYTEs	immediate node address--bridge on local network to destination
 18h 10 BYTEs	destination internetwork address (see #03824 at INT 7A/BX=000Bh)
 22h	WORD	(big-endian) retransmit count
 24h	WORD	(big-endian) estimated roundtrip delay
 26h	WORD	(big-endian) retransmitted packets
 28h	WORD	(big-endian) suppressed packets
 2Ah 12 BYTEs	??? (v2.15)