[time-nuts] Best OS for small time server

[Robert Vassar]

Eric,



It doesn't have full flow control.  No DCD pin.  I was thinking USB  
serial dongle, but I don't think that would work.  It doesn't  
implement an a high priority interrupt like a traditional PC com  
port.  I think some of the antique versions of NTPD supported using  
RD.  The GPIO pin might be made to work, but you're off in to custom  
refclock coding.


Rob


On Feb 24, 2008, at 4:45 AM, Eric Fort wrote:

> serial port for the slug:
>
> http://www.rwhitby.net/projects/nslu2
>
> my slug has one.  I believe the slug also has some gpio pins that  
> may be
> usefull for pps.
>
> Eric
>
> On Fri, Feb 22, 2008 at 12:55 AM, Matthew Smith  
> <matt at smiffytech.com> wrote:
>
>> Hi Rob
>>
>>> I live in Texas, so I have something more than a passing familiarity
>>> with oppressive heat.  In essence, every watt imported into my den
>>> has to be forcibly removed 9 months of the year, if not more.
>> Yup - sounds like here, probably just shifted by six months.
>>
>>> ...  I picked up a
>>> Linksys NSLU2 network storage widget and hacked into it.  It runs a
>>> minimal Linux system on a very low power ARM processor, and uses USB
>>> attach disk storage.
>> Hmm - interesting.  I know of these 'slugs' being used as the  
>> heart of
>> 1-Wire (R) weather systems.  Think there is a way of fitting a serial
>> port, with a little hardware hacking, but will have to check on that.
>>
>>> ...But I thought you'd fine the
>>> flash disk results interesting.
>> And was my concern, but the atime thing mentioned in other posts  
>> may be
>> a way around it.
>>
>>> Beyond this, Dave Mills, the author of NTP has a great paper on high
>>> resolution timekeeping in Unix kernels.  It's a bit dated, circa
>>> 1994, but it might be worth a read.
>> I thank you - I'll have a look at this.
>>
>> Cheers
>>
>> M
>>
>>
>> --
>> Matthew Smith
>> Smiffytech - Technology Consulting & Web Application Development
>> Business: http://www.smiffytech.com/
>> Personal: http://www.smiffysplace.com/
>> LinkedIn: http://www.linkedin.com/in/smiffy
>>
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