Re: [ts-7000] time at power on

[joel garner <>]

dear all,

 

i am not talking about the optional real time clock.

my qureries were about the on board realtime clock.

does the kernel by default has patches whereby it operates the on-board RTC as soon as it is switched on or these patches are required to be installled as and when one needs them?

 

chill,

Joel.

Jim Jackson <> wrote:

> On Mon, 6 Mar 2006, joel garner wrote:
>
> > ts-7250 has no real time clock,
>
> It can have - it is an oiptional extra.
>
> > so is it that whever the board is powered on the time starts from 00:00.
> > and what is the accuracy of this time..minutes, seconds, microseconds?
>
> When it starts it start at 0 exactly :-)
>
> A description of how unix !
>  systems
>  handle normal time is at....
>
> http://en.wikipedia.org/wiki/Unix_epoch
>
> However the system clocks can provide more accurary, dependant on the
> hardware, and to some extent the kernel configuration. The kernel keeps a
> "jiffy" timer count of the number of system timer interrupts. These are
> usually arranged to be at 100HZ, but can be patched to other values
> (1024HZ is a common value).
>
> This ref has some info....
>
> http://www.xml.com/ldd/chapter/book/ch06.html
>
> Use of Specific hardware counters may allow more accurate resolution. As
> to Accuracy, that depends on the many factors.
>
> I've found the free running timers on the ts7200 allow my box to keep an
> accuracy of the order of 1 sec in a couple of days.
>
> There have been some discussions on this in this list in the early days -
> I suggest you search the list a!
>  rchive at
>  yahoo

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