Bitfields for EV_NETWORK_STATUS in register DX:
Bit(s)	Description	)
	Token-Ring		FDDI
 15	SIGNAL_LOSS		SIGNAL_LOSS
 14	HARD_ERROR		HARD_ERROR
 13	SOFT_ERROR		SOFT_ERROR
 12	TRANSMIT_BEACON		TRANSMIT_BEACON
 11	LOBE_WIRE_FAULT		PATH_TEST_FAILED
 10	AUTO_REMOVAL		SELF_TEST_REQUIRED
 9	reserved		reserved
 8	REMOVE_RECEIVED		REMOTE_DISCONNECT
 7	COUNTER_OVERFLOW	reserved
 6	SINGLE_STATION		DUPLICATE_ADDRESS
 5	RING_RECOVERY		NO_RING_OP_STATUS
 4	reserved		VERSION_MISMATCH
 3	reserved		STUCK_BYPASS
 2	reserved		FDDI_EVENT
 1	reserved		RING_OP_CHANGE
 0	reserved		reserved
Note:	EV_NETWORK_STATUS is not supported on Ethernet