$PDP11: README,v 1.1.1.1 2014/06/08 00:09:21 form Exp $

Time Over Ethernet Protocol
~~~~~~~~~~~~~~~~~~~~~~~~~~~
Protocol type is 0x757E (^RTIM), Function codes are 0x5971 (^RREQ) for
time request, and 0x8308 (^RANS) for server answer.

RT-11 and RSX-11 date/time blocks are ignored for time requests.

Hertz value should be in range 1-1000, and if it's not equal to 50 or 60,
then RT-11 .SDTTM block is filled with -1's.

System ID must be null-terminated string (and may be empty).

	+---------------+
000	|               |
002	|  dst address  |
004	|               |
	+---------------+
006	|               |
010	|  src address  |
012	|               |
	+---------------+
014	| ptotocol type |
	+---------------+
016	| function code |
	+---------------+
020	|     hertz     |
	+---------------+
022	|     date      |
024	|    time hi    | RT-11 .SDTTM format
026	|    time lo    |
	+---------------+
030	|     year      |
032	|     month     |
034	|      day      |
036	|      hour     | RSX-11 GTIM$ format
040	|     minute    |
042	|     second    |
044	|      tick     |
046	|      tkps     |
	+---------------+
050	|   System ID   |
	|  256. bytes   |
	+---------------+
