[time-nuts] GPS for Nixie Clock

Vlad time at patoka.org
Tue Jul 12 16:43:12 EDT 2016

DHCP is handy to provide the IP address and specify which NTP server to 
use. Using DHCP I don't need to setup all the network settings for my 
project. The NTP packet parser itself is really small and doing its duty 
very well. Using such setup, it gives me flexibility to choose the 
different NTP servers as a time source. It could be my own NTP or it 
could be NTP pool.

On 2016-07-12 16:21, Hal Murray wrote:
> time at patoka.org said:
>> In addition, even MCU has not enough resources to handle TCP/IP, DHCP  
>> and
>> NTP, it is some solutions available to outsource it to dedicated  
>> chips. I
>> was using WIZ5100 (assembled as a modules) with great success.
> NTP is pretty simple.  If you are willing to take a few shortcuts,
> things get even simpler.  If you have a NTP server on your LAN, you
> can skip routing and DHCP by broadcasting a request.  It would be
> interesting to see how small you could make a set-the-time package.
> The Xerox Alto had an Ethernet boot loader in microcode.  (and space
> in the microcode ROM was tight)  When bringing up a new machine, we
> figured out that it was much simpler and faster to debug the Ethernet
> before the disk controller.  The debugger worked over the Ethernet.
> That gave you a solid place to stand early in the debugging process.



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